Jun. 2021, 土木学会, 土木学会論文賞　　　　　　　　　　　　　　　
一般廃棄物ガス化溶融および灰溶融施設で生成される溶融メタルの金属資源性評価[土木学会論文集G（環境）Vol.76, No.1, pp.1-8, 2020.]
山口 直久;松藤 敏彦;東條 安匡;仲嶺 彰人

Sep. 2020, 環境大臣表彰（令和2年度廃棄物・浄化槽研究開発功労者）　　　　　　　　　　　　　　　
東條安匡

Mar. 2020, Journal of Material Cycle and Waste Management, Leading Reviewer Award 2020　　　　　　　　　　　　　　　
Yasumasa Tojo

IMPROVEMENT OF INSOLUBILIZATION EFFICIENCY OF CESIUM IN FLY ASH BY ALKALI FELDSPAR USING ROTARY KILN
TOJO Yasumasa, OKUBO Haruo, HWANG In-Hee, MATSUO Takayuki
Japanese Journal of JSCE, 79, 25, n/a, Japan Society of Civil Engineers, 2023
Japanese, At present, to reduce the volume of decontamination waste, thermal treatment is carried out. In the thermal treatment, cesium (Cs) is volatilized and separated, resulting in fly ash containing much radioactive Cs. Cs in this fly ash is a chloride and is soluble. For safe final disposal, it is preferable that Cs in fly ash is insoluble. In this study, applying the mechanism that alkali feldspar makes Cs insoluble under heating conditions, whether the efficiency of insolubilization of Cs in fly ash improves was investigated by using rotary kiln. Indian feldspar, fly ash, and cesium chloride were mixed and heated at 700°C in a rotary kiln. No effect of rotating speed on Cs insolubilization was observed. After heating at 4 rpm of rotating speed and 700°C of temperature for 15 hours, 99% of the added cesium became insoluble. Even the addition ratio of Indian feldspar is reduced to about 80% of the amount of fly ash, by heating the mixture for 15 hours, 96% insolubilization of Cs was achieved.

Dry scrubbing of municipal solid waste incineration flue gas using porous sodium carbonate produced via vacuum thermal treatment of sodium bicarbonate
In-Hee Hwang, Takayuki Matsuo, Toshihiko Matsuto, Yasumasa Tojo, Ryoji Sameshima
Journal of Material Cycles and Waste Management, 23, 4, 1609, 1616, Springer Science and Business Media LLC, Jul. 2021
Scientific journal

Insolubilization of Cesium contained in fly ash by co-heating with potassium feldspar　　　　　　　　　　　　　　　
Yasumasa Tojo
Global Environmental Research, 24, 2, 173, 180, Jun. 2021, [Peer-reviewed], [Invited], [Lead author, Corresponding author]
English, Scientific journal

Simultaneous effects of airflow and temperature increase on water removal in bio-drying
Geun-Yong Ham, Dong-Hoon Lee, Toshihiko Matsuto, Yasumasa Tojo, Jae-Ram Park
Journal of Material Cycles and Waste Management, 22, 4, 1056, 1066, Springer Science and Business Media LLC, Jul. 2020, [Peer-reviewed]
English, Scientific journal

THE EFFECT OF INSIDE CIRCUMSTANCE OF THE HAZARDOUS WASTE LANDFILL ON THE LEACHING BEHAVIOR OF HARMFUL HEAVY METALS
Yasumasa Tojo
International Journal of GEOMATE, 18, 69, International Journal of Geomate, 01 May 2020, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

Effect of phosphate compound on the reduction of the pressure drop of laboratory-scale fabric filter
Shigetoshi Takahashi, In-Hee Hwang, Takayuki Matsuo, Yasumasa Tojo, Toshihiko Matsuto
Environmental Technology, 1, 8, Informa UK Limited, 23 Apr. 2020, [Peer-reviewed]
English, Scientific journal

パレスチナにおける廃棄物処分場環境監査マニュアルの作成　　　　　　　　　　　　　　　
東條安匡
廃棄物資源循環学会誌, 31, 2, Mar. 2020, [Invited], [Lead author]
Japanese, Symposium

EVALUATION OF METAL RESOURCE POTENTIAL OF MOLTEN METAL PRODUCED IN MUNICIPAL SOLID WASTE GASIFICATION MELTING FURNACES AND ASH MELTING FURNACES
Naohisa YAMAGUCHI, Toshihiko MATSUTO, Yasumasa TOJO, Akihito NAKAMINE
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 76, 1, 1, 8, Japan Society of Civil Engineers, 2020, [Peer-reviewed]
Japanese, Scientific journal

Material and moisture balance in a full-scale bio-drying MBT system for solid recovered fuel production
Geun-Yong Ham, Toshihiko Matsuto, Yasumasa Tojo, Takayuki Matsuo
Journal of Material Cycles and Waste Management, 22, 1, 167, 175, Springer Science and Business Media LLC, Jan. 2020, [Peer-reviewed]
English, Scientific journal

An on-site survey on household-scale anaerobic digestion in Sri Lanka
Kotte Hewa, Praween Madusanka, Toshihiko Matsuto, Yasumasa Tojo
Journal of Material Cycles and Waste Management, 2018, [Peer-reviewed], [Last author]
English, Scientific journal

Study on the Drying Process of the Solid Waste in Landfill under Arid Climate　　　　　　　　　　　　　　　
Kanta Okamoto, Yasumasa Tojo, Takayuki Matsuo
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 74, 7, 305, 316, 2018, [Peer-reviewed], [Corresponding author]
Scientific journal

Questionnaire and onsite survey on municipal solid waste composting in Sri Lanka
Kotte Hewa Praween Madusanka, Toshihiko Matsuto, Yasumasa Tojo, In-Hee Hwang
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT, 19, 2, 804, 814, SPRINGER, Apr. 2017, [Peer-reviewed]
English, Scientific journal, This study was conducted to evaluate the composting processes in Sri Lanka and to identify essential improvements. The study consisted of a questionnaire survey, field observations, and interviews. The main shortcomings identified by this study were: no source separation at origin, and no monitoring for temperature, moisture, stability, or maturity during processes of composting. These problems hinder the smooth operation of the composting processes and lead to low demand for compost. Based on the findings, the recommendations for increasing the demand for compost are performing source separation during waste collections, improvement of processes by monitoring the temperature and moisture, and marketing compost so as to improve the popularity of the compost among farmers.

Study on the drying process of the waste in the landfill under arid climate
Momose Hirotaka, Tojo Yasumasa, Matsuo Takayuki, Matsuto Toshihiko
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 28, 453, 453, Japan Society of Material Cycles and Waste Management, 2017
Japanese, Drying process of waste in landfill located in arid region was investigated from column experiment and numerical calculation. The concrete objective is to confirm whether the drying progresses to the inside of the landfill layer under the conditions in which evaporation is dominant. Drying experiments were conducted using four types of simulated waste. In the sand used as a control, drying in the deeper region did not proceed. This is because drying of the surface causes a drastic decrease in unsaturated hydraulic conductivity which makes liquid water transfer difficult. It is also caused by the condition in which internal evaporation hardly occurs. On the other hand, in case of waste which has larger voids inside, since internal evaporation occurred due to the heat transferred to the deep part, drying progressed. Excluding liquid water movement, coupled model considering only internal evaporation could reproduce experimental results roughly. This result suggests that stabilization is restrained by drying in landfill in arid region.

Immobilization and insolubilization of cesium contained in waste by coincineration with alumino-silicates
Sakamotto Sakura, Tojo Yasumasa, Matsuo Takayuki, Matsuto Toshihiko
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 28, 463, 463, Japan Society of Material Cycles and Waste Management, 2017
Japanese, Previous studies had revealed that the mineral which captures Cs as hardly-soluble form in the incineration bottom ash is the microcline or albite. In this study, the possibility whether this alkali feldspar can capture Cs as hardly soluble form when it coexists in the thermal treatment process of combustible decontamination waste was investigated. Three kinds of feldspars of ceramic raw materials and two types of reagent sets synthesizing feldspar were added to artificially created decontamination waste and incineration tests were carried out. As a result, the proportion of the hardly soluble Cs in the incineration residue increased. In particular, in the series using reagents synthesizing feldspar, the capturing rate of Cs to the bottom ash and the proportion of the hardly soluble Cs increased. This implies that these materials can be utilized to capture Cs into bottom ash as a hardly soluble form. Furthermore, in order to investigate the capturing of Cs in the fly ash, CsCl was added to these materials and the heating test was carried out. As a result, it was found that Cs can be captured as the hardly soluble form at a high rate in the series using reagent synthesizing feldspar.

Reaction mechanism of gaseous hydrogen chloride and calcium hydroxide in dry scrubbing of incineration flue gas
Hwang In-Hee, Sudo Wataru, Matsuo Takayuki, Tojo Yasumasa, Matsuto Toshihiko
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 28, 331, 331, Japan Society of Material Cycles and Waste Management, 2017
Japanese, ごみ焼却排ガス中の塩化水素は粉末の消石灰を煙道に吹き込む乾式法により処理されることが多い。本研究ではBF内のろ布堆積層を模擬したラボスケール実験より消石灰と塩化水素の反応機構を明らかにすることを目的とした。実験結果から消石灰と塩化水素の主な反応生成物はCaClOHであり，消石灰より過剰量の塩化水素が供給される条件でもCaCl₂生成しないことがわかった。系内に未反応の消石灰が存在すると，先に塩化水素と反応してしまい，CaClOHと塩化水素の反応によるCaCl₂の生成まで進まなかった。また，BF温度条件(約170℃)でCaCl₂と消石灰はお互いに短時間で反応しCaClOHを生成することがわかった。消石灰の効率的利用を考えると，CaCl₂まで反応を進行させることが望ましいが，現在の乾式処理条件ではCaClOH生成に留まっている可能性が高いと判断した。  

Removal and speciation of mercury compounds in flue gas from a waste incinerator
In-Hee Hwang, Hiroshi Minoya, Takayuki Matsuo, Toshihiko Matsuto, Yasumasa Tojo
ENVIRONMENTAL TECHNOLOGY, 37, 21, 2723, 2730, TAYLOR & FRANCIS LTD, Nov. 2016, [Peer-reviewed], [Last author]
English, Scientific journal, The management and control of mercury emissions from waste incinerators have become more significant, because waste incinerators are sinks to treat mercury-containing consumer products. This study investigated the effects of mercury concentrations and waste incineration temperatures on mercury speciation using a lab-scale experimental instrument. The removal characteristics of different mercury species were also investigated using an apparatus to simulate the fabric filter with a thin layer of additives such as Ca(OH)(2) and NaHCO3, activated carbon (AC), and fly ash. HgCl2 generation rates peaked at 800 degrees C for initial Hg-0 concentrations of 0.08-3.61mg/Nm(3) in the presence of 400ppm HCl. A linear relationship was established between the generation rate of HgCl2 and the logarithmic value of initial mercury concentration. Fly ash proved highly efficient in mercury removal, being equal or superior to AC. On the other hand, Ca(OH)(2) and NaHCO3 were shown to have no effects on mercury removal. In the dry-scrubbing process, alkali agent is often sprayed in amounts beyond those stoichiometrically required to aid acidic gas removal. The research suggests, however, that this may hinder mercury removal from the flue gas of solid waste incinerators.

Municipal solid waste management in Tehran: Changes during the last 5 years
Tahereh Malmir, Yasumasa Tojo
WASTE MANAGEMENT & RESEARCH, 34, 5, 449, 456, SAGE PUBLICATIONS LTD, May 2016, [Peer-reviewed]
English, Scientific journal, The situation of waste management in Tehran was a typical example of it in developing countries. The amount of municipal solid waste has been increasing and the city has depended on landfill for municipal solid waste management. However, in recent years, various measures have been taken by the city, such as collecting recyclables at the source and increasing the capacity of waste-processing facilities. As a result, significant changes in the waste stream are starting to occur. This study investigated the nature of, and reasons for, the marked changes in the waste stream from 2008 to 2012 by analysing the municipal solid waste statistics published by the Tehran Waste Management Organization in 2013 and survey data on the physical composition of the municipal solid waste. The following trends were identified: Although the generation of municipal solid waste increased by 10% during the 5-year period, the amount of waste directly disposed of to landfill halved and resource recovery almost doubled. An increase in the capacity of a waste-processing facility contributed significantly to these changes. The biodegradable fraction going to landfill was estimated by using the quantity and the composition of each input to the landfill. The estimated result in 2012 decreased to 49% of its value in 2008.

Influence of weathering of bottom ash on the leaching behavior of cesium　　　　　　　　　　　　　　　
Y. TOJO, S. IWAMOTO, M. ISHII, T. MATSUTO, AND, T. MATSUO
International Journal of GEOMATE, 12, 32, 43, 49, 2016, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal

安全・安心な埋立地の要件 「特集 埋立地の安全を考える―埋立地の安全性の検証方法に関わる昨今の動向と概念の整理―」　　　　　　　　　　　　　　　
東條安匡
廃棄物資源循環学会誌, Vol. 27, No. 1, 10, 17, 2016, [Invited], [Lead author, Corresponding author]
Japanese, Research society

中間処理残渣主体埋立地に対応した安定化促進技術の開発　　　　　　　　　　　　　　　
東條安匡
生活と環境, Vol.60, No.12, 64, 69, 01 Dec. 2015, [Invited], [Lead author, Corresponding author]
Japanese, Research society

Prediction of long-term leachate generation at municipal solid waste landfill under arid climate
Nomura Hiroshi, Tojo Yasumasa, Matsuo Takayuki, Matsuto Toshihiko
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 26, 445, 445, Japan Society of Material Cycles and Waste Management, 2015
In arid climates, evaporation considerably exceeds precipitation so that the source of leachate is mainly limited to the water derived from the waste in the landfill. This also implies that leachate generation will eventually cease, and that the waste inside the landfill will gradually dry out. In this study, a simple water balance model was created and applied to estimate the time period for which leachate was generated using meteorological data obtained in an arid climate. Several meteorological stations located in arid climates were selected according to the Koppen-Geiger climate classification. The results showed that leachate was generated only for the period in which municipal solid waste (MSW) was disposed of, and the greater part of the precipitation was consumed by evaporation. Almost no leachate was generated after the end of the disposal operation. This scenario applied for all of the modeled regions. The quantity of water inside the landfill was also calculated. The results from all locations indicated that the quantity of water in the landfill started to decrease after the completion of the waste disposal operation, which implies that the waste inside the landfill will subsequently dry out.

Study on the accumulation mechanism of cesium in the amorphous phase around mineral particle in incineration bottom ash
Sakamotto Sakura, Tojo Yasumasa, Matsuo Takayuki, Matsuto Toshihiko
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 26, 533, 533, Japan Society of Material Cycles and Waste Management, 2015
Authors had elucidated the reason why cesium (Cs) in bottom ash becomes hardly-soluble. From the observation by scanning electron microscope and polarization microscope, it was found that Cs accumulates at peripheral area of specific mineral. In its location, glassy amorphous phase formed and Cs was captured in it physically. However, from where the specific mineral was derived was not known. Was it contained in original waste subjected to combustion? Or was it formed from elements contained in the waste during combustion? In this study, origin of the specific mineral that captures Cs in bottom ash on the amorphous surface was investigated. Inorganic material such as clay etc. and organic matter such as paper, wood etc was selected as the samples subjected to the combustion. Cesium carbonate was added to these samples and then the samples were combusted. After combustion, residues were collected and thin section was created for microscopic analysis. As consequences, the following findings were obtained. Although clay samples captured Cs completely after combustion, these particles were too small compared to the specific mineral that was identified in the past study. When glass was heated with Cs, Cs accumulated at the edge of melted region.

Effectiveness of the vertical gas ventilation pipes installed after the landfill closure for promoting waste stabilization in post-closure phase　　　　　　　　　　　　　　　
Yasumasa Tojo, Natsuki Kishizawa, Toshihiko Matsuto, Takayuki Matsuo
Jurnal Rekayasa Kimia dan Lingkungan, 10, 3, 116, 258, 2015, [Peer-reviewed], [Invited], [Lead author]
Scientific journal

Prediction of Long-term Leachate Generation in a Municipal Solid Waste Landfill in an Arid Climate　　　　　　　　　　　　　　　
Tahereh MALMIR, Hiroshi NOMURA, Yasumasa TOJO
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 71, 7, 247, 258, 2015, [Peer-reviewed]
Scientific journal

早期安定型最終処分場技術−廃棄物特性や中間覆土が埋立地や浸出水に与える影響−　　　　　　　　　　　　　　　
小野雄策, 遠藤和人, 東條安匡, 山田正人
廃棄物資源循環学会誌, Vol.26, No.1, 22, 34, 2015, [Invited]
Japanese, Research society

Identification of the Existing Form of Cesium in Bottom Ash and Fly Ash in Municipal Solid Wastes
Yuka Watanabe, Amirhomayoun Saffarzadeh, Yasumasa Tojo, Takayuki Shimaoka
Spring-8/SACLA Research Report, 2, 1, 89, 93, 2014, [Peer-reviewed]
Japanese, Scientific journal

EFFECT OF pH AND TEMPERATURE ON LEACHING OF CESIUM FROM MUNICIPAL SOLID WASTE BOTTOM ASH
Yutaka DOTE, Tomoo SEKITO, Ryo MOROOKA, Takayuki SHIMAOKA, Yasumasa TOJO, Hideki YOSHIDA, Takashi KAWANO
Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), 70, 7, 217, 223, Japan Society of Civil Engineers, 2014, [Peer-reviewed]
Japanese, Scientific journal, In order to clarify the leachability of cesium from bottom ash of municipal solid waste, sequential extraction, pH dependence test, and temperature dependence test were conducted. Bottom ash was obtained by incinerating RDF or wood chips to which stable cesium solution was added. It was found that the cesium fraction distribution pattern of bottom ash from wood chips except water soluble fraction was similar to that of actual bottom ash. Less than a pH of 5, cesium leaching ratio was largely increased with decrease in pH. Over a pH of 5, cesium leaching ratio was almost same as that at natural pH. Increase of cesium leaching ratio at 60°C was 1.2 times higher than that at 20°C in average. Therefore, the effect of pH and temperature on cesium leaching would be negligible in actual landfill conditions. Cesium in residual state would be present with aluminum and iron that were insoluble in reduction condition.

Strategy for separation and treatment of disaster waste: a manual for earthquake and tsunami disaster waste management in Japan
Misuzu Asari, Shin-ichi Sakai, Toshiaki Yoshioka, Yasumasa Tojo, Tomohiro Tasaki, Hidetaka Takigami, Kohei Watanabe
JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT, 15, 3, 290, 299, SPRINGER, Sep. 2013, [Peer-reviewed]
English, Scientific journal, Shortly after the March 11th earthquake and tsunami in eastern Japan, a Task Team for Disaster Waste Management and Reconstruction was established within the Japan Society of Material Cycles and Waste Management (JSMCWM). One of the major tasks undertaken by the team was to create a manual entitled, Strategies for Separation and Treatment of Disaster Waste. In this paper, this JSMCWM manual is introduced, followed by a review of existing guidelines for disaster waste management in various countries. We identify useful guidelines created by international agencies, national and local governments. The JSMCWM manual adds our new experiences, especially characterized by a huge scale of disaster and tsunami information, to the existing knowledge with an emphasis on separation and subsequent treatment options. It should be desirable to share our knowledge and experiences, not only domestically but also with other countries in the world, especially regions that could be affected by large earthquake and tsunami events.

Study on the influence of solidification of MSWI bottom ash on the emission of easily mobile elements　　　　　　　　　　　　　　　
Yasumasa Tojo, Mikako Ishii, Toshihiko Matsuto, Takayuki Matsuo
2nd International Conference on Final Sinks, 16 May 2013, [Lead author]
English, International conference proceedings

震災廃棄物処理特集(1)岩手県における災害廃棄物処理―処理計画を中心に―
佐々木秀幸, 颯田尚哉, 東條安匡, 鈴木拓也
廃棄物資源循環学会誌, 23, 1, 40, 46, 31 Jan. 2012, [Invited]
Japanese, Research society

Study on the influence of hardening of MSWI bottom ash on the emission of easily mobile salts
Tojo Yasumasa, Ishii Mikako, Matsuo Takayuki, Matsuto Toshihiko
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 23, 527, 527, Japan Society of Material Cycles and Waste Management, 2012
In the landfills at where MSWI bottom ash is mainly disposed of, hardening of bottom ash after landfilled was frequently identified. If hardening of bottom ash occurs in landfill, hydraulic conductivity and air permeability decrease. Then, degradation and stabilization of waste are thought to be delayed as the result of inhibition of air intrusion and rain infiltration. In addition, hardening of a part of ash layer causes preferential flow and it results in partial wash out of mobile elements. If stabilization of ash landfill is defined to be complete elimination of pollutants, hardening is not preferable phenomena. However, if the stabilization is defined to be the minimization of emission of pollutants and stable capturing of mobile elements, hardening leads to early stabilization. In this study, to evaluate the effect of hardening on the wash out of easily mobile salts, evolution of hydraulic conductivity and change of leaching characteristics according to hardening were experimentally investigated.

Prediction on the long-term fate of polycyclic aromatic hydrocarbons in landfill brought by MSWI residues
Sato Masahiro, Tojo Yasumasa, Matsuo Takayuki, Matsuto Toshihiko
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 23, 535, 535, Japan Society of Material Cycles and Waste Management, 2012
多環芳香族炭化水素（PAHs）は焼却残渣に含まれ、埋立地に持ち込まれる。本研究では、埋立地における長期的なPAHsの放出予測を行うために、 PAHsの有機炭素への親和性を考慮したモデル式と既存の物質挙動予測モデルを用いて、焼却残渣埋立層内の有機物消長に伴うPAHｓの挙動について数値計算を行い、放出を予測した。約50年で層内のpHが低下し生分解が生じる条件で100年間の計算を行った結果、経過約45年までは、焼却灰から洗い出される有機炭素へ収着して放出されるPAHsは10%以下であり，固相への収着が支配的であった。一方、分解条件下では、固相の有機炭素が減少するものの、PAHsの生分解が支配的となるために放出の増加は見られなかった。放出濃度につても生態系に影響を及ぼす濃度での放出は起こらないと予測できた。

Feasibility of hydrothermal treatment for recovery of liquid fertilizer from scallop entrails
Hwang In-Hee, Aoyama Hiroya, Matsuo Takayuki, Matsuto Toshihiko, Tojo Yasumasa
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 23, 619, 619, Japan Society of Material Cycles and Waste Management, 2012
English, Scallop entrails include a lot of nutrient such as nitrogen, phosphorus, and potassium, which contain toxic heavy metal such as cadmium in digestive gland. In this work, the current situation of scallop entrails recycling was investigated. Besides, hydrothermal treatment using subcritical water (HTSW) was examined as a recovery method of liquid fertilizer from scallop entrails. 59 wt% of scallop entrails was recycled by composting and 34 wt% of that was recycled by feedstuff manufacturing respectively. In composting facilities, scallop entrails have been commonly mixed with other input wastes to adjust cadmium concentration of compost under 5 mg/kg. Some facilities have proven to be suffered from lack of input waste to mix with scallop entrails in some case. On the other hand, at the HTSW of scallop entrails and digestive gland in the condition of 200^oC, RT=20 min, and L/S ratio=10, the extraction of fertilizer components such as nitrogen, phosphorus, and potassium to liquid product was maximized whereas the release of cadmium tended to be suppressed. The concentrations of heavy metals were lower than maximum permissible concentration of Fertilizer Regulation Act. From these results, HTSW was considered as one of feasible recycling methods for scallop entrails with separating cadmium from product.

Dechlorination of mono-chlorobenzene in flue gas of municipal solid waste incinerator using activated clay
Takahashi Shigetoshi, Hwang In-Hee, Matsuo Takayuki, Matsuto Toshihiko, Tojo Yasumasa
Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management, 23, 417, 417, Japan Society of Material Cycles and Waste Management, 2012
In MSWI, various treatment processes are performed for decreasing fly ash, acid gas, heavy metals and dioxins. Nowadays, the review of each processes and the development of new technologies are done because it is needed to restraint emission of environmental pollutant substances and optimization of running cost and energy in the flue gas treatment. As one of them, the high temperature dust collection using the ceramic filter is expected to decrease running cost and energy in the plant, owing to omit the process of gas cooling and reheating. In this study, it was investigated that the decomposition availability of dioxins by dechlorination using activated clays as inorganic matters substituted for activated carbon at 300^oC, the dust collecting operation temperature. As the basic study of it, using activated clays made in Japan, it was confirmed the removal rate of mono-chlorobenzene, the removal special characteristic and the effect of dechlorination, depending on temperature conditions.As a result, activated clays are divided according to their ability of dechlorination.

Distribution characteristics of polycyclic aromatic hydrocarbons when solid waste coexists with the dissolved organic carbon
Masahiro SATO, Yasumasa TOJO, Takayuki MATSUO, Toshihiko MATSUTO
Environmental Engineering Research, JSCE, 48, III.553-III.563, 25 Nov. 2011, [Peer-reviewed]
Japanese, Scientific journal

An investigation of carbon release rate via leachate from an industrial solid waste landfill
Hee Jong Kim, Toshihiko Matsuto, Yasumasa Tojo
WASTE MANAGEMENT & RESEARCH, 29, 6, 612, 621, SAGE PUBLICATIONS LTD, Jun. 2011, [Peer-reviewed]
English, Scientific journal, Long-term behaviour of leachate pollutants is a key factor to estimate time and cost required for the leachate treatment in landfills. Estimating carbon release via leachate can be a good way by which to understand the long-term behaviour, however, most studies have had a timeline of only several months or years. In this study, a release rate of carbon via leachate for 20 years was estimated at an industrial solid waste landfill. The total carbon content in dumped waste was estimated based on combustible contents determined by collecting samples from other industrial landfills and pretreatment facilities, and carbon contents in literature values. Leachate quantity data, which were not recorded for the first ten years, were estimated using a macro-moisture balance model including the effect of snow melt. Because leachate quantity and quality at each site were only measured after leachates were mixed, the quantity at each site was calculated by assuming infiltration rates with and without final cover. Results indicated that less than 2% of total input carbon was released from each site via leachate regardless of landfill age.

Monitoring of leachate quality stored in gas ventilation pipes for evaluating the degree of landfill stabilization
Yasumasa Tojo, Masahiro Sato, Takayuki Matsuo, Toshihiko Matsuto
WASTE MANAGEMENT & RESEARCH, 29, 1, 41, 49, SAGE PUBLICATIONS LTD, Jan. 2011, [Peer-reviewed], [Lead author, Corresponding author]
English, Scientific journal, Monitoring of leachate quality is the essential measure in aftercare for evaluating landfill stabilization. Generally, the most common way of leachate monitoring is executed at the inlet of the leachate treatment facility. However, it does not necessarily reflect the actual state of the site. Thus, methodologies which focus on both the discharge, in order to determine when the post-closure care of the facility should terminate, and on the degree of waste stabilization in the landfill are required. In the present study, monitoring of leachate quality stored in 68 gas ventilation pipes was conducted and the degree of waste stabilization at each location in the landfill was estimated by a statistical approach using the results obtained by monitoring. Leachate characteristics varied significantly for each pipe but seemed to reflect the waste condition of the nearby location. Correlation among the analysed items was quite high. Namely, the difference of leachate quality seemed to be categorized only by the level of concentration but not by the specific characteristics. To confirm this, Euclidean distances of dissimilarity were calculated by multidimensional scaling using six items of leachate quality and temperature. Two factors (thickness of leachate and concentration of total organic carbon (TOC) and electric conductivity (EC)) that distinguish leachate characteristics appeared. To indicate the degree of stabilization by location, the spatial distribution of TOC, total nitrogen (TN), inorganic carbon (IC), and chloride ion were estimated by using the ordinary Kriging methodology. As the result, it was estimated that the concentration of leachate existing within the landfill, especially TN, was higher than the completion criteria for leachate in most parts of the investigated area.

Investigation of Polycyclic Aromatic Hydrocarbons (PAHs) Content in Bottom Ashes from some Japanese Waste Incinerators and Simple Estimation of their Fate in Landfill　　　　　　　　　　　　　　　
Masahiro Sato, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
Sustainable Environment Research, 21, 4, 219, 227, 2011, [Peer-reviewed]
Scientific journal

Air and landfill gas movement through passive gas vents installed in closed landfills
Hee-Jong Kim, Hideki Yoshida, Toshihiko Matsuto, Yasumasa Tojo, Takayuki Matsuo
WASTE MANAGEMENT, 30, 3, 465, 472, PERGAMON-ELSEVIER SCIENCE LTD, Mar. 2010, [Peer-reviewed]
English, Scientific journal, In a closed landfill, Japan, remedial actions have been undertaken to address the inadequate leachate collection and drainage systems. Part of this process included installing many passive gas vents in the landfill to promote stabilization of landfilled waste. This study focused on the gas velocity in vents by conducting tracer tests to elucidate the gas flow via passive gas vents. The gas composition and gas temperature in the vents was also measured.
As the gas vents pass through the waste layer, both landfill gas and air flows through the vents. Therefore, passive gas vents can be used to aerate landfilled waste as well as to collect and release landfill gas. Aerobic biodegradation occurs when air migrates through the waste layer if organic matter is present; this increases the temperature of the waste layer. Inflow of air into the gas vents can occur at a wide range of depths, even 10-20 m below ground level. Air is induced not from the surface of the landfill, but horizontally along the waste layer. The driving force of air induction from outside is a buoyancy effect caused by the temperature rise due to aerobic biodegradation. (c) 2009 Elsevier Ltd. All rights reserved.

Gypsum and organic matter distribution in a mixed construction and demolition waste sorting process and their possible removal from outputs
A. Montero, Y. Tojo, T. Matsuo, T. Matsuto, M. Yamada, H. Asakura, Y. Ono
JOURNAL OF HAZARDOUS MATERIALS, 175, 1-3, 747, 753, ELSEVIER SCIENCE BV, Mar. 2010, [Peer-reviewed]
English, Scientific journal, With insufficient source separation, construction and demolition (C&D) waste becomes a mixed material that is difficult to recycle. Treatment of mixed C&D waste generates residue that contains gypsum and organic matter and poses a risk of H(2)S formation in landfills. Therefore, removing gypsum and organic matter from the residue is vital. This study investigated the distribution of gypsum and organic matter in a sorting process. Heavy liquid separation was used to determine the density ranges in which gypsum and organic matter were most concentrated. The fine residue that was separated before shredding accounted for 27.9% of the waste mass and contained the greatest quantity of gypsum; therefore, most of the gypsum (52.4%) was distributed in this fraction. When this fine fraction was subjected to heavy liquid separation, 93% of the gypsum was concentrated in the density range of 1.59-2.28, which contained 24% of the total waste mass. Therefore, removing this density range after segregating fine particles should reduce the amount of gypsum sent to landfills. Organic matter tends to float as density increases; nevertheless, separation at 1.0 density could be more efficient. (C) 2009 Elsevier B.V. All rights reserved.

Fate of Elements at Quasi-stabilization and the Need for Elucidation on Substance Behavior for Complete Landfill Stabilization
TOJO Yasumasa
Material cycles and waste management research, 20, 6, 278, 282, 廃棄物資源循環学会, 30 Nov. 2009, [Invited], [Lead author, Corresponding author]
Japanese, Research society, Elements in waste that are disposed of are eventually transferred to either of three destinations : into the atmosphere by landfill gas, into the surface water by leachate, or into a solid waste body within a landfill. Past studies indicate that the ratio of elements that remain in a landfill is rather high even twenty years after disposal. And they also found that these elements diminish from the landfill very slowly even when several centuries are taken into consideration. This implies that many elements remain even after intense reaction phases cease and emission drops to a level where no treatment is required. It must be important to guarantee that these residual elements never cause a negative impact, over long-range period of time. Most of the numerical models for simulating substance behavior in landfills have, up to now, mainly dealt with the degradation process and generation of landfill gas. For long-term prediction, especially with regard to hazardous elements, the model which can deal with the formation of the high molecular organic compounds such as humic substances needs to be developed.

Gypsum distribution in a mixed construction and demolition waste sorting process and its composition in residue　　　　　　　　　　　　　　　
A. Montero, Y. Tojo, T. Matsuo, T. Matsuto, M. Yamada, H. Asakura, Y. Ono
Proceedings of Twelfth International Waste Management and Landfill Symposium, SARDINIA 2009, 09 Oct. 2009
English, International conference proceedings

Study on Spontaneous Combustion of Wastes Caused by Moisture Adsorption during Storage
KAKUTA Yoshitada, MACHIDA Takao, MATSUTO Toshihiko, TOJO Yasumasa, MATSUO Takayuki
Journal of the Japan Society of Material Cycles and Waste Management, 20, 1, 39, 51, 一般社団法人 廃棄物資源循環学会, 29 Jan. 2009, [Peer-reviewed]
Japanese, Scientific journal, Heat generation caused by moisture adsorption was investigated experimentally and the possibility of spontaneous combustion was evaluated through numerical simulation of the storage of large quantities of waste fuels such as wood chips and RDF. The equilibrium moisture content of each waste sample, as the main parameter for the numerical simulation, was measured in this experiment. We confirmed that the change in pyrolysis residue was different from that occurring in other samples. When the model of adsorption rate was examined in the moisture adsorption experiment, the model in which the r...

External Factors Affecting Leaching Characteristics of Heavy Metals from Recycled Material Produced for Construction Use　　　　　　　　　　　　　　　
Yasumasa Tojo, Shinya Mizubayashi, Takayuki Matsuo, Hirofumi Sakanakura, Masahiro Osako, Toshihiko Matsuto
Proceedings of APLAS Sapporo 2008, The 5th Asian-Pacific Landfill Symposium, 22 Oct. 2008, [Lead author]
English, International conference proceedings

Characterization of Melting Fly Ash from MSW by X-ray Photoelectron Spectroscopy　　　　　　　　　　　　　　　
Hiroyuki Inano, Kohji Itabashi, Takashi Okada, Yasumasa Tojo
Proceedings of APLAS Sapporo 2008, The 5th Asian-Pacific Landfill Symposium, 22 Oct. 2008, [Last author]
English, International conference proceedings

Material Flow Analysis of Mixed C&D Waste Treatment Facility for Indentifying the Factor Affecting Residue Quality　　　　　　　　　　　　　　　
Jose Alfaro Montero, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto, Masato Yamada, Yusaku Ono
Proceedings of APLAS Sapporo 2008, The 5th Asian-Pacific Landfill Symposium, 22 Oct. 2008

Investigation of Material Separation of Mixed Construction and Demolition Waste by Sorting Process
Alonso Montero, Yasumasa TOJO, Takayuki MATSUO, Toshihiko MATSUTO, Masato YAMADA, Hiroshi ASAKURA, Yusaku ONO
Environmental Engineering Research, JSCE, 45, 271, 278, Japan Society of Civil Engineers, 2008, [Peer-reviewed]
English, Scientific journal, The final disposal ratio of mixed construction and demolition waste (MCDW) remains high in Japan, while progress has been made in the recycling of other construction and demolition waste. Sorting facilities are expected to play an important role in better management of MCDW. In this study, the feasibility of sorting facilities for the separation of material and of pretreatment for fmal disposal was investigated by conducting a batch experiment at a real operational facility. The material flow of each output fraction was determined based on the mass distribution and on analysis of the ignition loss and metal content. The separation of organic matter and ferrous metal achieved by the sorting process was excellent; almost 70% was separated out for recycling and did not go for disposal. Although the distribution ratios of heavy metals, such as Pb and Zn, sent to landfill were still high, their content little changed from the condition of the original mixed waste. The process of sorting MCDW achieved reduction of mass for disposal, reduction of the organic load directed to the landfill, and the diversion of iron from MCDW to recycling.

Compartment model of aerobic and anaerobic biodegradation in a municipal solid waste landfill
Sang-Yul Kim, Yasumasa Tojo, Toshihiko Matsuto
WASTE MANAGEMENT & RESEARCH, 25, 6, 524, 537, SAGE PUBLICATIONS LTD, Dec. 2007, [Peer-reviewed]
English, Scientific journal, The mathematical formulations in a one-dimensional compartment model of the biodegradation of organic landfill components are described. The model is designed to switch between anaerobic and aerobic conditions, depending on the local oxygen concentration. The model also includes the effect of environmental factors, such as moisture content, pH, and temperature, on reaction rates. The model includes not only biodegradation processes for carbon compounds (acetate, CO2 CH4), but also for nitrogen compounds involved in nitrification and denitrification due to their significance in landfills. Two example runs to simulate anaerobic and aerobic waste were conducted for a single landfill unit cell by changing the organic content and diffusion coefficient.

Removal of Chlorine from Melting Fly Ash by Solvent Washing Methods
OKADA Takashi, MATSUTO Toshihiko, TOJO Yasumasa
Journal of the Japan Society of Waste Management Experts, 18, 6, 357, 366, 一般社団法人 廃棄物資源循環学会, 30 Nov. 2007, [Peer-reviewed]
Japanese, Scientific journal, Fly ash generated from MSW ash-melting and gasification-melting plants, known as Melting Furnace Fly Ash (MFA), is a valuable resource due to the high content of Lead and Zinc in MFA. This study aimed to find the optimal solvent washing method to remove chlorine, the major contaminant for the refinery process. Four kinds of solvent were used in this study : distilled water, sodium carbonate (Na2CO3), sodium sulfate (Na2SO4), and distilled water with CO2 bubbling. After solvent concentration, gas flow rate, number of washings, temperature and washing time were determined, twenty-three MFA fr...

Characterization of residual carbon influencing on de novo synthesis of PCDD/Fs in MSWI fly ash
Y. Kakuta, T. Matsuto, Y. Tojo, H. Tomikawa
CHEMOSPHERE, 68, 5, 880, 886, PERGAMON-ELSEVIER SCIENCE LTD, Jun. 2007, [Peer-reviewed]
English, Scientific journal, Using 19 samples of fly ash collected from various MSW incineration facilities, residual carbon was characterized by gasifiable fraction at 450 degrees C (C-450), and the correlations with de novo synthesis of PCDD/Fs were experimentally examined. Fly ashes were classified into three groups by the ratio of C-450 to total residual carbon. By comparison of CO and CO2 generation patterns with those of reference materials, unburnt carbon of solid waste and activated carbon powder injected into flue gas were identified as a carbon source in fly ash. In the experiment of de novo synthesis of PCDD/Fs, the content of PCDD/F synthesis depended on C-450 regardless of the origin of carbon. In addition, the model to predict the content of PCDD/F synthesis, Delta PCDD/F = 0.989(.)CU(.)C(450), fitted well with experimental values. (c) 2007 Elsevier Ltd. All rights reserved.

Characterization of Shredder Residues Derived from End-of-Life Vehicles and Home Electrical Appliances
MATSUTO Toshihiko, NAKAJIMA Shohei, TOJO Yasumasa, KAKUTA Yoshitada, MATSUO Takayuki
Journal of the Japan Society of Waste Management Experts, 18, 2, 126, 136, 一般社団法人 廃棄物資源循環学会, 31 Mar. 2007, [Peer-reviewed]
Japanese, Scientific journal, Shredder residues derived from ELV (End of Life Vehicles), home electrical appliances, automatic vending machines, and other products were characterized in terms of composition, heating value, and other parameters. Samples were collected from several shredding facilities that use different processes.Physical compositions are different for each kind of shredded product. While hard plastics account for 70 percent of the residue in electrical appliances, various types of combustible components are included in the residue of ELV. Material recycling, therefore, is difficult when mixed products a...

Selection of Cost-effective Zn and Pb Recovery Method from Melting Fly Ash Based on Ca and Si Contents
OKADA Takashi, MATSUTO Toshihiko, TOJO Yasumasa
Journal of the Japan Society of Waste Management Experts, 18, 1, 8, 19, 一般社団法人 廃棄物資源循環学会, 31 Jan. 2007, [Peer-reviewed]
Japanese, Scientific journal, Fly ash generated from MSW ash-melting and gasification-melting plants, known as Melting Furnace Fly Ash (MFA), is a valuable resource due to its high content of Pb (Lead) and Zn (Zinc) in MFA. In order to recover metals from MFA, pre-treatment for metal enrichment and removal of unwanted elements is necessary. Meanwhile, the elemental composition of MFA depends on the variation of furnace type, input waste, the injection of calcium hydroxide for gas treatment, etc. This study aims to find the most cost-effective recovery method according to the elemental composition of MFA, based on a meta...

DEVELOPMENT OF AN INTEGRATED RISK ASSESSMENT MODEL FOR SOLID WASTE LANDFILL
HANADA Shigehisa, MATSUTO Toshihiko, TOJO Yasumasa
Doboku Gakkai Ronbunshuu G, 62, 4, 377, 390, 20 Jan. 2007, [Peer-reviewed]
Japanese, Scientific journal

A study on hierarchical framing and standardization of leaching tests for waste utilization in Japan　　　　　　　　　　　　　　　
H. Sakanakura, M. Osako, K. Miyawaki, S. Sakita, Y. Tojo, H. Sakamoto, K. Endo, T. Tanosaki, A. Kida, S. Sakai
SARDINIA 2007 11th International Waste Management and Landfill Symposium, 2007
English, International conference proceedings

Assessment of biodegradability of waste in old landfill　　　　　　　　　　　　　　　
Yasumasa Tojo, Suthatip Pueboobpaphan, Toshihiko Matsuo, Takayuki Matsuto, Yoshitada Kakuta
SARDINIA 2007 11th International Waste Management and Landfill Symposium, 2007, [Lead author]
English, International conference proceedings

Recovery of zinc and lead from fly ash from ash-melting and gasification-melting processes of MSW - Comparison and applicability of chemical leaching methods
T. Okada, Y. Tojo, N. Tanaka, T. Matsuto
WASTE MANAGEMENT, 27, 1, 69, 80, PERGAMON-ELSEVIER SCIENCE LTD, 2007, [Peer-reviewed]
English, Scientific journal, Fly ash generated from MSW ash-melting and gasification-melting plants, known as Melting Furnace Fly Ash (MFA), contains considerable amounts of heavy metals such as Pb and Zn. These metals can be recovered using a smelting furnace after "pre-treatment" for removal of unnecessary elements such as Cl, Sn and Si. Chemical methods have been studied for pretreatment in the past. However, they have been discussed only with regard to treatment cost and the concentration of Pb and Zn recovered, but neither applicability to various types of MFA nor the environmental impact have been considered. In this study, acid, alkaline and ammonia/chloride leaching methods were compared from the standpoints of: (1) applicability to MFA, (2) concentration of Pb and Zn recovered, (3) treatment cost, and (4) environmental impact.
Twenty-three samples of MFAs were collected and classified into 4 types based on element contents. A Pb and Zn recovery experiment was conducted for the representative MFA of those types. The results showed: (1) MFA from gasification-melting plants cannot be treated by chemical methods; (2) the other MFA can be treated to an acceptable quality by existing smelting furnaces; (3) only MFA from electric resistance ash-melting plants can be treated easily by the water washing method; and (4) alkaline and ammonia/chloride leaching methods were more effective than acid leaching. (c) 2006 Elsevier Ltd. All rights reserved.

Oxygen intrusion into waste in old landfills of low organic content
A Kallel, N Tanaka, Y Tojo, T Matsuto, S Hanada
WASTE MANAGEMENT & RESEARCH, 24, 3, 242, 249, SAGE PUBLICATIONS LTD, Jun. 2006, [Peer-reviewed]
English, Scientific journal, Oxygen invasion into old landfills was studied by assuming the installation of gas venting pipes to promote stabilization of waste. In an experiment using a column pack with old incombustible waste, oxygen intrusion was observed and the oxygen consumption rate was estimated. Oxygen diffused into the waste layer very quickly in the initial stage of the experiment, but oxygen concentration increased only gradually due to reduced gradient and decreasing oxygen consumption. The maximum oxygen consumption rate in packed waste was one-third of that in loosely deposited waste in a beaker measured in a respiration test. A mathematical model was created which fitted the experimental data well and a three-dimensional simulation of a full-scale landfill and a sensitivity analysis were performed.

MODELING OF LEAKAGE THROUGH LANDFILL BOTTOM LINER AND OVERFLOW FROM WASTE STORAGE DAM UNDER VARIOUS OPTIONS FOR DESIGN, CONSTRUCTION AND MAINTENANCE
HANADA Shigehisa, TOJO Yasumasa, MATSUTO Toshihiko
Journal of Japan Society of Civil Engineers G, 62, 1, 171, 182, Japan Society of Civil Engineers, 20 Apr. 2006, [Peer-reviewed]
Japanese, Scientific journal, Leakage of leachate through landfill bottom liner and overflow of leachate from waste storage dam were modeled under various options for design, construction and maintenance. The model includes lateral flow on an intermediate cover, a bypass flow through vertical pipes (ex. gas venting pipes), and leachate accumulation in a landfill caused by clogging of leachate collection pipes and inadequate capacity of leachate storage pond. By using this model, the amounts of leakage through three types of bottom liners were calculated and compared. Moreover, the mounts of leakage and overflow were calculated under various options for design, construction, maintenance and waste characteristics. The calculation results showed that the hydraulic conductivity of sand drainage layer, the number of geomembrane sheet defects, the diameter of a sheet defect and the hydraulic conductivity of clay used in the single composite liner incresed leakage rate severely. This shows that for the reduction of leakage rate through the bottom liner, the selection of material for sand drainage layer, quality assurance of sheet, technical skill of operators and the installation of clay liner are very important. In addition, the calculation results showed that the functional failure of gas collection pipe could cause overflow of leachate from waste storage dam, particularly when the soil with low permeability was used as the cover material.

Requisite condition of F/M ratio and volumetric load for avoiding VFA accumulation on dry thermophilic anaerobic digestion　　　　　　　　　　　　　　　
Yasumasa Tojo, Toshihiko Matsuto, Yoshitada Kakuta, Takayuki Matsuto
VENICE 2006 Biomass and Waste to Energy Symposium, 2006
English, International conference proceedings

Past, present, and future of MSW landfills in Japan
Nobutoshi Tanaka, Yasumasa Tojo, Toshihiko Matsuto
Journal of Material Cycles and Waste Management, 7, 2, 104, 111, Aug. 2005, [Peer-reviewed]
English, International conference proceedings, This article focuses on the historical development of landfill technology since the beginning of the nineteenth century in Japan. The regulations and guidelines that form a framework for the technology are reviewed, and the historical background and the current state of Japanese municipal solid waste (MSW) management are described. Through the analysis of data collected from facility leaflets, changes in the leachate treatment system are surveyed. Finally, the concept of the "sustainable bioreactor landfill with low organics" is proposed. © Springer-Verlag Tokyo 2005.

Leaching behaviour of elements and evaluation of pre-treatment methods for municipal solid waste incinerator residues in column leaching tests
SY Kim, N Tanaka, T Matsuto, Y Tojo
WASTE MANAGEMENT & RESEARCH, 23, 3, 220, 229, SAGE PUBLICATIONS LTD, Jun. 2005, [Peer-reviewed]
English, Scientific journal, Two new pre-treatment methods (water-washing/carbonation and carbonation/phosphate stabilization) of municipal solid waste (MSW) incinerator residues were evaluated by column leaching tests under aerobic conditions and anaerobic conditions (which were changed to aerobic conditions after 10 months). A mixture of bottom ash and fly ash (5: 1 ratio) was pre-treated using each method. Shredded incombustible residues (SIR) were added to each ash preparation in proportions similar to the ratios present in landfills. For comparison, landfill wastes typical of Japan, namely, a mixture of bottom ash, chelating-pre-treated fly ash, and SIR, were also examined. Leachate samples were collected periodically and analysed over a 15-month period. When compared with chelating pre-treatment, both water-washing/carbonation and carbonation/phosphate stabilization reduced the leaching of Pb, Al, and Cu by about one to two orders of magnitude. Moreover, the initial concentrations of Ca and Pb in leachates from column of water-washing/carbonation were 56-57% and 84-96% less than those from the column of carbonation/phosphate stabilization. Therefore, water-washing/carbonation was considered to be a promising approach to obtain early waste stabilization and to reduce the release of heavy metals to near-negligible levels. The leaching behaviour of elements was also discussed.

Survey on Current State of Landfilled Waste, especially on Incombustible Waste
TOJO Yasumasa, TANAKA Nobutoshi, MATSUTO Toshihiko, KAKUTA Yoshitada, MATSUO Takayuki
Journal of the Japan Society of Waste Management Experts, 16, 2, 130, 140, 廃棄物学会, 31 Mar. 2005, [Peer-reviewed]
Japanese, Scientific journal

NUMERICAL MODELING OF LONG-TERM BEHAVIOR OF WASTE IN LANDFILL　　　　　　　　　　　　　　　
Yasumasa Tojo, Nobutoshi Tanaka, Toshihiko Matsuto, Masahiro Osako
The International Conference on Environmental Science and Technology, 2005
English, International conference proceedings

Optimum washing condition for condensing heavy metals in melting furnace fly ash　　　　　　　　　　　　　　　
Yasumasa Tojo, Takashi Okada, Nobutoshi Tanaka, Toshihiko Matsuto, Yoshitada Kakuta, Takayuki Matsuo
SARDINIA 2005 Tenth International Waste Management and Landfill Symposium, 2005
International conference proceedings

Risk assessments of MSW landfill under various options for design operation and maintenance　　　　　　　　　　　　　　　
Shigehisa Hanada, Yasumasa Tojo, Toshihiko Matsuto, Nobutoshi Tanaka
SARDINIA 2005 Tenth International Waste Management and Landfill Symposium, 2005
International conference proceedings

Influence of clogging on transmissivity of geosynthetic drainage material adopted for landfill leachate collection system
Yasumasa Tojo, Nobutoshi Tanaka, Toshihiko Matsuto, Takayuki Matsuo
Environmental engineering research, JSCE, 42, 219, 230, Japan Society of Civil Engineers, 2005, [Peer-reviewed], [Lead author]
Japanese, Scientific journal, Drainage of leachate is important in order to prevent leachate storage, which causes leakage risk, and to avoid the circumstance of the landfill bottom turning to the anaerobic condition. However, care must be needed when designing and constructing drainage system at landfill, because drainage material inevitably contacts biologically and chemically active leachate, which triggers clogging of drainage material. Especially in Japan, recent leachate contains salts at relatively high concentration. Such leachate quality accelerates formation of calcium carbonate. In this study, the influence of clogging on the transmissivity of geosynthetics drainage material was investigated by conducting various flow experiments. As consequences, the following results were obtained:(1) All geosynthetic material tested in this study indicated high trapping efficiency of suspended solid. And it resulted in decrease of hydraulic conductivity of them.(2) Raw leachate causes the decrease of hydraulic conductivity more severely than the physical clogging effect. And degree of the transmissivity loss was much when leachate of high pH or leachate from incineration ash was used.(3) Results of numerical simulation showed that some geosynthetic materials lose transmissivity completely within a year if it was adopted for leachate drainage system.

Dry Separation of actual shredded bulky wastes by fluidized bed technology　　　　　　　　　　　　　　　
Y.Kakuta, T.Matsuto, Y.Tojo, T.Matsuo
Selected Papers presented at the Third International Symposium on Feedstock Recycling of Plastic, 449, 455, 2005

Carbonization of Household Waste for Recycling and Thermal Pre-treatment for Landfill Disposal
MATSUTO Toshihiko, TANAKA Nobutoshi, KAKUTA Yoshitada, TOJO Yasumasa, MATSUO Takayuki
Journal of the Japan Society of Waste Management Experts, 15, 5, 408, 417, 一般社団法人 廃棄物資源循環学会, 30 Sep. 2004, [Peer-reviewed]
Japanese, Scientific journal, Residential waste was carbonized as a means of fuel production, metal recovery, and pretreatment for landfill. Tested materials were combustible waste, incombustible waste and bulky waste, which were collected from a residential area and a shredding facility.<BR>Char product from bulky waste showed good quality for fuel due to high wood content and potential recovery of metal such as Cu. The quality of char from the other two types of waste was low, but the leaching of heavy metal was minimized and organic contents were reduced, showing its effectiveness as a pretreatment for landfill dispo...

溶融処理から発生する飛灰の金属濃縮について　　　　　　　　　　　　　　　
東條安匡
財団だより，廃棄物研究財団, No.59, 22, 26, 2004, [Invited], [Lead author]
Japanese, Research society

UNSATURATED HYDRAULIC CHARACTERISTIC OF VARIOUS RESIDUES FROM INTERMEDIATE WASTE TREATMENT PROCESS
TOJO Yasumasa, TANAKA Nobutoshi, MATSUTO Toshihiko, MATSUO Takayuki
Doboku Gakkai Ronbunshu, 727, 727, 113, 118, 土木学会, 22 Feb. 2003, [Peer-reviewed], [Lead author]
Japanese, Scientific journal

ANEXPERIMENTAL STUDY OF UNSATURATED WATER MOVEMENT IN INCINERATION RESIDUE LAYER
TOJO Yasumasa, TANAKA Nobutoshi, MATSUTO Toshihiko, MATSUO Takayuki
Doboku Gakkai Ronbunshu, 720, 720, 77, 88, 土木学会, 22 Nov. 2002, [Peer-reviewed], [Lead author]
Japanese, Scientific journal

Lab Scale Experiment for Control of Incineration Residue Dispersion in MSW Landfill
MATSUTO Toshihiko, TOJO Yasumasa, MATSUO Takayuki, TANAKA Nobutoshi
Journal of the Japan Society of Waste Management Experts, 13, 4, 175, 183, 一般社団法人 廃棄物資源循環学会, 31 Jul. 2002, [Peer-reviewed]
Japanese, Scientific journal, Since most dioxins produced by the incineration process are deposited in incineration residues, MSW landfill can be a possible dioxin source to the environment through the dispersion of residues. In this study, the possibility of residue dispersion was studied by using a lab-scale wind chamber. An operational target to prevent dispersion was then proposed.<BR>Incineration ashes from four different MSW incinerators were used in the experiment. To simulate dumping residues in a landfill, ash was charged from the top upstream of the chamber. Only fine particles of less than 250 micro-meters ar...

Lateral drainage promotion at waste and intermediate cover boundary　　　　　　　　　　　　　　　
Yasumasa Tojo, Nobutoshi TANAKA, Toshihiko MATSUTO, Takayuki MATSUO
Proceedings of the 2002 spring conference of the Korea Society of waste Man agement, 267, 270, May 2002, [Lead author]
English, International conference proceedings

Active control of leachate movement using landfill structure -numerical study-
Yasumasa Tojo, Nobutoshi TANAKA, Toshihiko MATSUTO, Takayuki MATSUO
Proceedings of APLAS, 301, 308, 2002, [Lead author]
English, International conference proceedings

Control of water movement by using lateral flow at waste and cover boundary
Yasumasa Tojo, Nobutoshi Tanaka, Toshihiko Matsuto, Takayuki Matsuo
Environmental engineering research, JSCE, 39, 413, 422, 2002, [Peer-reviewed], [Lead author, Corresponding author]
Japanese, Scientific journal

AN APPLICATION OF CAPILLARY BARRIER AS A LEACHATE DRAINAGE SYSTEM AT BOTTOM OF LANDFILL - EXPERIMENTAL STUDY -
TOJO Yasumasa, TANAKA Nobutoshi, MATSUTO Toshihiko, MATSUO Takayuki
Doboku Gakkai Ronbunshu, VII-21, 692, 53, 62, 土木学会, 22 Nov. 2001, [Peer-reviewed], [Lead author, Corresponding author]
Japanese, Scientific journal, Experiments had been conducted for investigating an applicability of capillary barrier as a leachate drainage system installing at bottom of landfill. Various characteristics, which include type of material, gradient, rainfall intensity, downdip structure, and length of slope, were changed in the experiments and their influences on drainage efficiency were evaluated. As a result, following consequences were obtained. Using high gradient, low rainfall intensity, uniform sand, dragging down upper layer at downdip, and short slope length increases the drainage capacity of capillary barrier. The drainage efficiency depends upon total quantity of water, which multiplied rainfall intensity by slope length. Therefore intensity of leachate reaching at the bottom of landfill should be restrained in practical use.

An Application of Capillary barrier as a leachate drainage system at bottom of landfill -Numerical Analysis-
Yasumasa Tojo, Nobutoshi TANAKA, Toshihiko MATSUTO
Journal of Japan Society of Civil Engineers, VII-21, 692, 41, 52, Japan Society of Civil Engineers, 22 Nov. 2001, [Peer-reviewed], [Lead author, Corresponding author]
Japanese, Scientific journal, Experimental results presented in previous report was almost reproduced by numerical model, which is employing film flow expression for water movement in gravel layer. The result of real scale numerical experiments carried out by the model showed leachate can be drained completely by capillary barrier if the intensity of leachate reached at the bottom of landfill was below 0.4mm/h. Several effective parameters were altered for examining the drainage capacity. As results, 1) the effectiveness of downdip structure dragging down upper layer can not improve after it exceeds certain depth. 2) more uniform sand can increase drainage capacity. 3) barrier can drain leachate completely as far as infiltrated water is small enough against the amount of water which can decrease potential of upper layer to boundary potential.

Investigation of surface runoff and its removal on landfill cover
Yasumasa Tojo, Nobutoshi TANAKA, Toshihiko MATSUTO, Takayuki MATSUO
Environmental engineering research, JSCE, 37, 423, 433, 2000, [Peer-reviewed], [Lead author, Corresponding author]
Japanese, Scientific journal

Metal Concentrations in the Soil Surrounding MSW Landfill Sites
TOJO Yasumasa, MATSUTO Toshihiko, MATSUO Takayuki, SAKANAKURA Hirofumi, TANAKA Nobutoshi
Journal of the Japan Society of Waste Management Experts, 10, 6, 311, 320, 一般社団法人 廃棄物資源循環学会, 30 Nov. 1999, [Peer-reviewed], [Lead author, Corresponding author]
Japanese, Scientific journal, Heavy metal concentrations in the soil surrounding two MSW landfill sites were investigated. At Site-A, the proportion of incineration ash disposed of is high, whereas it is low at Site-B. Incineration ash contains various kinds of metallic elements. Calcium, Zinc, Copper, and Sodium are especially highly concentrated in the ash compared with noncontaminated soil. An 0.1 N hydrochloric acid extraction procedure was adopted to extract those metallic elements from the soil samples, and the extracted solutions were analyzed by atomic absorption spectrometry. As a result, high concentrations we...

In situ intake rate measurement for determining hydraulic conductivity of solid waste layers
東條安匡, 田中信寿, 松藤敏彦, 松尾孝之
Environmental engineering research, JSCE, 35, 11, 19, Japan Society of Civil Engineers, 1997, [Peer-reviewed], [Lead author, Corresponding author]
Japanese, Scientific journal, To determine hydraulic property of solid waste materials, in situ intake rate measurements were conducted at surface of landfill. As object layers, incineration residue layers, refuse Layers, and incombustible waste layers were selected to measure. Intake rate of incineration residue decrease suddenly after infiltration started, and then rapidly reach to constant rate, so called final intake rate, within 300 to 500 sec. Refuse layer also indicates similar intake rate transition. To confirm the relationship between final intake rate and saturated hydraulic conductivity, constant head hydraulic conductivity test was carried out for the same samples brought back to laboratory in undisturbed condition. Since good agreements are identified between them, hydraulic conductivity was estimated from the rate. Determined hydraulic conductivity is 10^-4 to 10^-1cmis for incineration residue layer, 10^-2cm/s for refuse layer, and 10⁰cm/s for incombustible waste layer. For trying to investigate the influence of matric suction to the rate curve, unsaturated water movement was simulated based on Green and Ampt theory. In respect with the curve obtained from incineration residue layer, water movement may be dominated by not suction but gravity, due to the analyses which exhibit calculated curve agree well when less suction was assumed.

Air Flow Rate in Leachate Collection Pipe of Semi-Aerobic Landfills ; The Case of a Single Pipe
KIM Youngkyu, MATSUTO Toshihiko, TOJO Yasumasa, TANAKA Nobutoshi
Journal of the Japan Society of Waste Management Experts, 6, 4, 129, 138, 一般社団法人 廃棄物資源循環学会, 31 Jul. 1995, [Peer-reviewed]
Japanese, Scientific journal, In a semi-aerobic landfill where the inlet and outlet of a leachate collection pipe are opened to the atmosphere, when there are any driving forces, atmospheric air flows easily into the pipe. Therefore it will be expected that oxygen can penetrate from the pipe to interior of landfill due to difference of oxygen concentration.<BR>The purpose of this study is to present calculation equations of air flow velocity in a single pipe, and to determine the pipe line design factors which are concerned with air flow in the pipe.<BR>Main results are as follows :<BR>1) Air velocity in a single pipe c...

The behavior of pure TRICHLOROETYLENE liquid in water unsaturated / saturated porous media -A experimental study-
Kazuei ISHII, Nobutoshi TANAKA, Toshihiko MATSUTO, Yasumasa Tojo
Environmental engineering research, JSCE, 32, 387, 396, 1995, [Peer-reviewed]
Japanese, Scientific journal

再生製品からの重金属溶出に環境因子が与える影響の把握
水林 晋哉, 東條 安匡, 松藤 敏彦, 廃棄物学会研究発表会講演論文集, 18, 987, 989, 19 Nov. 2007
廃棄物学会, Japanese

ガス抜き管内貯留水の水質による安定化モニタリングの可能性
佐藤 昌宏, 東條 安匡, 松尾 孝之, 廃棄物学会研究発表会講演論文集, 18, 769, 771, 19 Nov. 2007
廃棄物学会, Japanese

埋立後長期間を経過した廃棄物の生物分解性を把握する手法に関する基礎的研究
東條 安匡, Pueboobpaphan Suthatip, 松尾 孝之, 廃棄物学会研究発表会講演論文集, 18, 872, 874, 19 Nov. 2007
廃棄物学会, Japanese

建設資材として利用される再生製品の溶出挙動予測モデルの作成
東條 安匡, 松藤 敏彦, 大迫 政浩, 廃棄物学会研究発表会講演論文集, 17, 1125, 1127, 20 Nov. 2006
廃棄物学会, Japanese

産業廃棄物適正処理のための物質収支モデルの作成
浜田 雄平, 東條 安匡, 松尾 孝之, 廃棄物学会研究発表会講演論文集, 17, 50, 52, 20 Nov. 2006
廃棄物学会, Japanese

金属回収のための溶融炉運転条件による重金属揮発挙動に関する研究
冨川 博貴, 岡田 敬志, 東條 安匡, 廃棄物学会研究発表会講演論文集, 17, 613, 615, 20 Nov. 2006
廃棄物学会, Japanese

溶融飛灰中の塩素除去法に関する研究
岡田 敬志, 牧志 諒, 東條 安匡, 廃棄物学会研究発表会講演論文集, 17, 619, 621, 20 Nov. 2006
廃棄物学会, Japanese

埋立地由来の健康リスク評価モデルの作成
花田 茂久, 松藤 敏彦, 東條 安匡, 廃棄物学会研究発表会講演論文集, 17, 324, 326, 20 Nov. 2006
廃棄物学会, Japanese

溶融飛灰中重金属の連続抽出による形態分析に関する研究
岡田 敬志, 鈴木 賢, 東條 安匡, 松藤 敏彦, 衛生工学シンポジウム論文集, 13, 111, 114, 16 Nov. 2005
北海道大学衛生工学会, Japanese

安全安心な廃棄物処理を目指して : 田中信壽先生が残した足跡
松藤 敏彦, 角田 芳忠, 東條 安匡, 土手 裕, 吉田 英樹, 宮脇 健太郎, 肴倉 宏史, 衛生工学シンポジウム論文集, 13, 1, 17, 16 Nov. 2005
北海道大学衛生工学会, Japanese

埋立地からの浸出水漏水・溢流量推定モデルの作成
花田 茂久, 東條 安匡, 松藤 敏彦, 廃棄物学会研究発表会講演論文集, 16, 962, 964, 31 Oct. 2005
廃棄物学会, Japanese

産業廃棄物の埋立物に関する特性の調査と分類法の検討
東條 安匡, 牧志 諒, 松藤 敏彦, 廃棄物学会研究発表会講演論文集, 16, 965, 967, 31 Oct. 2005
廃棄物学会, Japanese

溶融飛灰中重金属の連続抽出による形態分析に関する研究
鈴木 賢, 岡田 敬志, 東條 安匡, 廃棄物学会研究発表会講演論文集, 16, 875, 877, 31 Oct. 2005
廃棄物学会, Japanese

産業廃棄物埋立処分場搬入物の調査と埋立負荷の将来予測に関する研究
筑紫 康男, 東條 安匡, 松藤 敏彦, 廃棄物学会研究発表会講演論文集, 16, 1063, 1065, 31 Oct. 2005
廃棄物学会, Japanese

平成16年度廃棄物学会奨励賞 廃棄物層内における水分移動現象とその制御法に関する研究 (廃棄物学会賞受賞者記念講演(奨励賞))
東條 安匡, 松藤 敏彦, 松尾 孝之, 廃棄物学会研究発表会講演論文集, 16, 5, 7, 31 Oct. 2005
廃棄物学会, Japanese

溶融飛灰からの金属回収に関する研究--溶融飛灰性状と水洗処理による山元還元の可能性
岡田 敬志, 東條 安匡, 松藤 敏彦, 廃棄物学会研究発表会講演論文集, 16, 610, 612, 31 Oct. 2005
廃棄物学会, Japanese

埋立地を発生源とする健康リスク評価モデルの作成
泉和足, 花田茂久, 松藤敏彦, 東条安匡, 松尾孝之, 角田芳忠, 廃棄物学会研究発表会講演論文集, 16th, Pt.1, 2005

一般廃棄物最終処分場における搬入物の有機物・金属負荷の実態調査
東條 安匡, 濱田 雄平, 田中 信壽, 廃棄物学会研究発表会講演論文集, 15, 1215, 1217, 17 Nov. 2004
廃棄物学会, Japanese

厨芥単独処理の高温・高固形物濃度メタン発酵の運転条件に関する検討
石原 和真, 東條 安匡, 田中 信壽, 廃棄物学会研究発表会講演論文集, 15, 471, 473, 17 Nov. 2004
廃棄物学会, Japanese

溶融飛灰からの金属回収に関する研究--化学的金属回収法の評価・比較
岡田 敬志, 東條 安匡, 田中 信壽, 廃棄物学会研究発表会講演論文集, 15, 745, 747, 17 Nov. 2004
廃棄物学会, Japanese

廃棄物埋立地内の超長期的物質挙動予測モデルの開発
東條 安匡, 田中 信壽, 大迫 政浩, 廃棄物学会研究発表会講演論文集, 14, 1064, 1066, 22 Oct. 2003
廃棄物学会, Japanese

都市ごみ溶融飛灰の水洗処理による金属濃縮に関する研究 (第14回廃棄物学会研究発表会)
津山 陽祐, 東條 安匡, 田中 信壽, 廃棄物学会研究発表会講演論文集, 14, 506, 508, 22 Oct. 2003
廃棄物学会, Japanese

埋立地浸出水水平排水材(ジオシンセティックス)の通水性能に関する研究 (第13回廃棄物学会研究発表会 講演論文集2) -- (埋立地しゃ水)
廣川 有司, 田中 信壽, 東條 安匡, 廃棄物学会研究発表会講演論文集, 13, 933, 935, 28 Nov. 2002
廃棄物学会, Japanese

埋立地内水分移動シミュレーションによる埋立構造と底部負荷水圧の関係
東條 安匡, 田中 信壽, 松藤 敏彦, 松尾 孝之, 衛生工学シンポジウム論文集, 8, 57, 62, 01 Nov. 2000
北海道大学衛生工学会, Japanese

キャピラリーバリアを利用した廃棄物処分場排水システムの開発
東條 安匡, 松藤 敏彦, 田中 信壽, 松尾 孝之, 相楽 光宏, 衛生工学シンポジウム論文集, 7, 59, 63, 01 Nov. 1999
北海道大学衛生工学会, Japanese

ごみ埋立地表面流の生成機構とその排除に関する研究
毛利 慎也, 東條 安匡, 田中 信壽, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 10, 2, 1042, 1044, 10 Oct. 1999
廃棄物学会, Japanese

各種廃棄物充填層の水分特性値の把握
寺澤 孝, 東條 安匡, 田中 信壽, 松藤 敏彦, 松尾 孝之, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 10, 2, 1051, 1053, 10 Oct. 1999
廃棄物学会, Japanese

多層型底部集排水構造の排水効果に与える影響因子に関する実験的研究
東條 安匡, 田中 信寿, 松藤 敏彦, 松尾 孝之, 菅原 淳, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 9, 2, 878, 880, 10 Oct. 1998
Japanese

焼却灰充填層の2次元不飽和水分移動とそのモデル化
東條 安匡, 松籐 俊彦, 田中 信寿, 松尾 孝之, 森田 祥子, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 8, 2, 735, 737, 10 Oct. 1997
Japanese

キャピラリーバリアを利用した廃棄物処分場底部浸出水集排水構造に関する基礎的研究
河野 孝, 田中 信寿, 東條 安匡, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 8, 2, 837, 839, 10 Oct. 1997
Japanese

都市ごみ破砕選別工場と破砕不燃残渣の組成に関する調査
関戸 知雄, 田中 信壽, 松藤 敏彦, 東條 安匡, 松尾 孝之, 衛生工学シンポジウム論文集, 4, 253, 257, 01 Nov. 1996
北海道大学衛生工学会, Japanese

北海道大学工学部における物質収支とごみ収集作業の現状
田中 信寿, 松藤 敏彦, 東條 安匡, 松尾 孝之, 松岡 秀明, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 7, 1, 168, 170, 01 Sep. 1996
Japanese

都市ごみ破砕選別工場の破砕不燃残渣の性状と変動特性に関する研究
関戸 知雄, 田中 信壽, 松藤 敏彦, 東條 安匡, 松尾 孝之, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 7, 1, 401, 403, 01 Sep. 1996
Japanese

北海道大学工学部におけるごみ発生・資源化の把握および意識調査
田中 信寿, 松藤 敏彦, 東條 安匡, 松尾 孝之, 藤田 洋司, 廃棄物学会研究発表会講演論文集 = Proceedings of the Annual Conference of the Japan Society of Waste Management Experts, 6, 1, 99, 101, 01 Oct. 1995
Japanese

災害廃棄物分別・処理実務マニュアル : 東日本大震災を踏まえて
廃棄物資源循環学会, （3-13, 3-15, 3-17, 3-19担当）
ぎょうせい, May 2012, 9784324094310, iii, 176p, 図版 [8] p, Japanese

環境工学公式・モデル・数値集
土木学会環境工学委員会環境工学に関わる出版準備小委員会, 土木学会環境工学委員会, 土木学会, 2.4.4(a)，pp.215-217
土木学会,丸善 (発売), Jun. 2004, 4810604217, 5, 727p, Japanese

廃棄物工学の基礎知識 : リサイクル・適正処分のための
田中 信壽, 松藤 敏彦, 角田 芳忠, 東條 安匡
技報堂出版, 2003, 9784765531894, Japanese

多様な自然環境下の埋立処分場の改善や今後の建設に向けた助言　　　　　　　　　　　　　　　
東條安匡
A webinar on "Sustainable Waste Management", A Technical Cooperation between Iran and Japan, 28 Apr. 2021, Nominated symposium
[Invited]

循環型社会実現のための廃棄物処理およびリサイクル技術　　　　　　　　　　　　　　　
東條安匡
Cеминар "Японский опыт работы с твердыми бытовыми отходами: переработка. использование", 16 Mar. 2021, Public discourse
16 Mar. 2021 - 17 Mar. 2021, [Invited]

Environmental Auditing of the Solid Waste Sanitary Landfills in Palestine　　　　　　　　　　　　　　　
Yousrea Ramadan, Yasumasa Tojo
4th International E-Conference on Advances in Engineering, Technology and Management - ICETM 2021, 24 Jan. 2021, English, Oral presentation

災害廃棄物処理-近年では必須となったこと-　　　　　　　　　　　　　　　
東條安匡
大規模災害時廃棄物対策北海道ブロック協議会 災害廃棄物処理に係るワークショップ, 11 Nov. 2020, Public discourse
[Invited]

Insolubilization of lead in MSW fly ash by co-heating with aluminosilicate　　　　　　　　　　　　　　　
Zihao GUAN, Yasumasa TOJO, In-Hee HWANG
第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Poster presentation
16 Sep. 2020 - 18 Sep. 2020

除染廃棄物の熱処理によって生ずる濃縮物中のCsのアルミノ珪酸塩による捕捉率向上　　　　　　　　　　　　　　　
和田航汰, 東條安匡, 松尾孝之, 松藤敏彦, 黄仁姫
第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Poster presentation
16 Sep. 2020 - 18 Sep. 2020

福島第一原子力発電所の廃炉により生ずるコンクリート廃棄物中のCs,Srの侵入状況評価手法の検討　　　　　　　　　　　　　　　
横川将也, 山田一夫, 東條安匡, 松藤敏彦, 松尾孝之, 黄仁姫
第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Poster presentation
16 Sep. 2020 - 18 Sep. 2020

アルミノケイ酸塩を用いた汚染飛灰中放射性Csの難溶性態化に関する研究　　　　　　　　　　　　　　　
坪井成浩, 東條安匡, 新井裕之, 松尾孝之, 松藤敏彦, 黄仁姫
第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Oral presentation
16 Sep. 2020 - 18 Sep. 2020

遮断型処分場に処分される耐火材からの六価クロムの長期溶出特性とその抑制対策　　　　　　　　　　　　　　　
横井理南, 東條安匡, 松尾孝之, 松藤敏彦, 黄仁姫
第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Poster presentation
16 Sep. 2020 - 18 Sep. 2020

焼却主灰中塩類の低溶出率に関する研究　　　　　　　　　　　　　　　
日下部一, 黄仁姫, 松尾孝之, 東條安匡, 松藤敏彦
第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese
16 Sep. 2020 - 18 Sep. 2020

重曹の真空加熱による酸性ガス処理用の高性能多孔質薬剤の製造　　　　　　　　　　　　　　　
黄仁姫, 松尾孝之, 東條安匡, 松藤敏彦, 増田倹吾
第31回廃棄物資源循環学会研究発表会, 17 Sep. 2020, Japanese, Oral presentation
16 Sep. 2020 - 18 Sep. 2020

Insolubilization of Cesium contained in fly ash by aluminosilicate　　　　　　　　　　　　　　　
Yasumasa Tojo, Yurika Itoga, Toshihiko Matsuto
Sardinia 2019 - 17th International Waste Management and Landfill Symposium, 02 Oct. 2019, English, Oral presentation
30 Sep. 2019 - 04 Oct. 2019

一般廃棄物焼却施設焼却灰からの鉛溶出量の影響要因に関する研究　　　　　　　　　　　　　　　
曽我孝彰, 黄仁姫, 松藤敏彦, 松尾孝之, 東條安匡
第30回廃棄物資源循環学会, 19 Sep. 2020, Japanese, Oral presentation
19 Sep. 2019 - 21 Sep. 2019

Material and moisture balance in a full-scale bio-drying MBT system　　　　　　　　　　　　　　　
Geun-Yong Ham, Toshihiko Matsuto, Yasumasa Tojo, Takayuki Matsuo
第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, English, Oral presentation
19 Sep. 2019 - 21 Sep. 2019

遮断型処分場内部の環境条件が有害重金属の溶出挙動に与える影響　　　　　　　　　　　　　　　
池田泰良, 東條安匡, 松尾孝之, 松藤敏彦, 山田正人
第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Poster presentation
19 Sep. 2019 - 21 Sep. 2019

アルミノケイ酸塩によるセシウムの難溶性態化に飛灰中アルカリ元素が与える影響　　　　　　　　　　　　　　　
小堀満代, 東條安匡, 松尾孝之, 松藤敏彦
第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Oral presentation
19 Sep. 2019 - 21 Sep. 2019

遮断型最終処分場の稼働状況と搬入物の実態調査　　　　　　　　　　　　　　　
吉川倫太郎, 東條安匡, 松尾孝之, 松藤敏彦, 山田正人
第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Oral presentation
19 Sep. 2019 - 21 Sep. 2019

覆蓋型最終処分場の構造・運転管理に関する現状分析　　　　　　　　　　　　　　　
松藤敏彦, 東條安匡
第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Oral presentation
19 Sep. 2019 - 21 Sep. 2019

竪型ストーカ炉における塩化水素ガス発生・除去に関する研究　　　　　　　　　　　　　　　
黄仁姫, 二上雄斗, 松尾孝之, 松藤敏彦, 東條安匡, 山田裕史
第30回廃棄物資源循環学会, 19 Sep. 2019, Japanese, Oral presentation
19 Sep. 2019 - 21 Sep. 2019

オンサイト製造消石灰の流動性評価手法の検討　　　　　　　　　　　　　　　
權田恭平, 黄仁姫, 松藤敏彦, 松尾孝之, 東條安匡, 木下亮
第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Oral presentation
19 Sep. 2019 - 21 Sep. 2019

一般廃棄物不燃・粗大ごみ中の希少金属量の推定　　　　　　　　　　　　　　　
髙橋悠, 松藤敏彦, 松尾孝之, 東條安匡
第30回廃棄物資源循環学会研究発表会, 19 Sep. 2019, Japanese, Oral presentation
19 Sep. 2019 - 21 Sep. 2019

建設混合廃棄物の資源化について～破砕選別処理の物質フロー～　　　　　　　　　　　　　　　
東條安匡
令和元年度（2019年度）北海道循環資源利用促進協議会総会・部会合同会議総会記念講演, 17 Jul. 2019, Japanese, Public discourse
[Invited]

アルカリ長石の非晶質化の効率化とメカノケミカル反応によるセシウムの捕捉　　　　　　　　　　　　　　　
東條安匡, 福岡大河, 松尾孝之, 松藤敏彦
第８回環境放射能除染研究発表会, 10 Jul. 2019, Japanese, Poster presentation

Study on operation and disposed wastes in hazardous waste landfill　　　　　　　　　　　　　　　
Rintaro Kikkawa, Yasumasa Tojo, Toshihiko Matsuto, Takayuki Matsuo
The 23rd Korea-Japan Joint International Session, The 2019 Spring Conference of the Korea Society of Waste Management, 20 May 2019, English, Poster presentation

Reduction of hydrogen chloride in the furnace of vertical type incinerator　　　　　　　　　　　　　　　
In-Hee Hwang, Yuto Futagami, Takayuki Matsuo, Yasumasa Tojo, Toshihiko Matsuto
The 23rd Korea-Japan Joint International Session, The 2019 Spring Conference of the Korea Society of Waste Management, 20 May 2019, English, Poster presentation

Factors affecting on leaching of lead from municipal solid waste incinerator residues　　　　　　　　　　　　　　　
Takaaki Soga, In-Hee Hwang, Toshihiko Matsuto, Takayuki Matsuo, Yasumasa Tojo
The 23rd Korea-Japan Joint International Session, The 2019 Spring Conference of the Korea Society of Waste Management, 20 May 2019, English, Poster presentation

Evaluation methodology on flowability of on-site produced slaked lime　　　　　　　　　　　　　　　
Kyohei Gonda, In-Hee Hwang, Toshihiko Matsuto, Takayuki Matsuo, Yasumasa Tojo, Ryo Kinoshita
The 23rd Korea-Japan Joint International Session, The 2019 Spring Conference of the Korea Society of Waste Management, 20 May 2019, English, Poster presentation

Material balance of bio-drying MBT facility for solid fuel production　　　　　　　　　　　　　　　
G.Y. Ham, T. Matsuto, T. Matsuo, N. Tsuboi, Y. Tojo, I. H. Hwang
IWWG-ARB 2019, The 4th Symposium of International Waste Working Group Asian Regional Branch, 20 Feb. 2019, English, Oral presentation
20 Feb. 2019 - 22 Feb. 2019

On-site production of slaked lime for the treatment of MSWI flue gas: effects of production conditions on acid gas removal and flow property　　　　　　　　　　　　　　　
I.-H. Hwang, K. Gonda, T. Matsuo, Y. Tojo, T. Matsuto
IWWG-ARB 2019, The 4th Symposium of IWWG Asian Regional Branch, 20 Feb. 2019, English, Oral presentation
20 Feb. 2019 - 22 Feb. 2019

INSOLUBILIZATION OF CESIUM CONTAINED IN FLY ASH BY ALUMINOSILICATE　　　　　　　　　　　　　　　
Y. TOJO, Y. ITOGA, T. MATSUO, T. MATSUTO
IWWG-ARB 2019, The 4th Symposium of IWWG Asian Regional Branch, 20 Feb. 2019, English, Oral presentation
20 Feb. 2019 - 22 Feb. 2019

Study on the Drying Process of the Solid Waste in Landfill under Arid Climate　　　　　　　　　　　　　　　
Kanta Okamoto, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
The 10th Asia-Pacific Landfill Symposium, 24 Nov. 2018, English, Oral presentation
24 Nov. 2018 - 26 Nov. 2018

コンバインド式メタン発酵施設におけるマテリアルフロー分析　　　　　　　　　　　　　　　
坪井成浩, 松藤敏彦, 松尾孝之, Eliza Canabal, 東條安匡, 黄仁姫
第26回衛生工学シンポジウム, 08 Nov. 2018, Japanese, Poster presentation
08 Nov. 2018 - 08 Nov. 2018

コンバインド式メタン発酵施設におけるマテリアルフロー分析　　　　　　　　　　　　　　　
坪井成浩, 松藤敏彦, 松尾孝之, カナバル エリザ, 東條安匡, 黄仁姫
2018年度 廃棄物資源循環学会北海道支部ポスター発表会, 23 Oct. 2018, Japanese, Poster presentation

オンサイト製造消石灰の流動性評価方法の提案と製造条件の影響　　　　　　　　　　　　　　　
権田恭平, 黄 仁姫, 松藤敏彦, 松尾孝之, 東條安匡
2018年度 廃棄物資源循環学会北海道支部ポスター発表会, 23 Oct. 2018, Japanese, Poster presentation

一般廃棄物焼却施設焼却灰からの鉛溶出への影響要因に関する研究　　　　　　　　　　　　　　　
曽我孝彰, 黄 仁姫, 松藤敏彦, 松尾孝之, 東條安匡
2018年度 廃棄物資源循環学会北海道支部ポスター発表会, 23 Oct. 2018, Japanese, Poster presentation

メカノケミカル反応によるアルカリ長石の粉砕過程での非結晶化とCs 捕捉　　　　　　　　　　　　　　　
福岡大河, 東條安匡, 松藤敏彦, 松尾孝之
2018年度 廃棄物資源循環学会北海道支部ポスター発表会, 23 Oct. 2018, Japanese, Poster presentation

遮断型最終処分場の長期的な環境安全性の評価に関する研究,　　　　　　　　　　　　　　　
吉川倫太郎, 東條安匡, 松藤敏彦, 松尾孝之
2018年度 廃棄物資源循環学会北海道支部ポスター発表会, 23 Oct. 2018, Japanese, Poster presentation

Introduction on the guideline of the landfill environmental auditing　　　　　　　　　　　　　　　
Yasumasa Tojo
National Seminar at Tehran Waste Management Organization, 10 Oct. 2018, English, Public discourse
10 Oct. 2018 - 10 Oct. 2018, [Invited]

コンバインド式メタン発酵施設におけるマテリアルフロー分析　　　　　　　　　　　　　　　
坪井成浩, 松藤敏彦, 松尾孝之, カナバル エリザ, 東條安匡, 黄 仁姫
第29回廃棄物学会研究発表会, 13 Sep. 2018, Japanese, Oral presentation
12 Sep. 2018 - 14 Sep. 2018

消石灰の焼却施設オンサイト製造における高反応化およびハンドリング性の改善に関する研究　　　　　　　　　　　　　　　
黄 仁姫, 酒井裕太郎, 松尾孝之, 東條安匡, 松藤敏彦
第29回廃棄物学会研究発表会講演論文集, 13 Sep. 2018, Japanese, Poster presentation
12 Sep. 2018 - 14 Sep. 2018

乾燥地域の埋立地における廃棄物の乾燥化メカニズムの解明　　　　　　　　　　　　　　　
岡本侃大, 東條安匡, 松尾孝之, 松藤敏彦
第29回廃棄物資源循環学会研究発表会, 12 Sep. 2018, Japanese, Oral presentation
12 Sep. 2018 - 14 Sep. 2018

アルミノ珪酸塩による飛灰中セシウムの難溶性態化　　　　　　　　　　　　　　　
糸賀悠里香, 東條安匡, 松尾孝之, 松藤敏彦
第29回廃棄物学会研究発表会講演論文集, 12 Sep. 2018, Japanese, Poster presentation
12 Sep. 2018 - 14 Sep. 2018

What hindered the smooth disaster waste disposal　　　　　　　　　　　　　　　
Yasumasa Tojo
The 10th Intercontinental Landfill Research Symposium, 27 Jun. 2018, English, Nominated symposium

Study on the drying process of the solid waste in landfill under arid climate　　　　　　　　　　　　　　　
Yasumasa Tojo, Kanta Okamoto, Takayuki Matsuo, Toshihiko Matsuto
The 10th Intercontinental Landfill Research Symposium, 27 Jun. 2018, English, Poster presentation

Influencing factor on acid gas removal and flow characteristics of slaked lime in onsite production process　　　　　　　　　　　　　　　
In-Hee Hwang, Yutaro Sakai, Takayuki Matsuo, Yasumasa Tojo, Toshihiko Matsuto
22nd Korea-Japan Joint International Session, The 2018 Spring Conference of the Korea Society of Waste Management, 10 May 2018
10 May 2018 - 10 May 2018

Investigation of the effect of Electrocoagulation operational parameters on the leachability of arsenic in sludge　　　　　　　　　　　　　　　
Wani Lukak, Yasumasa Tojo
22nd Korea-Japan Joint International Session, The 2018 Spring Conference of the Korea Society of Waste Management, 10 May 2018
10 May 2018 - 10 May 2018

Estimation of sorting efficiency and material flow in combined type anaerobic digestion facility　　　　　　　　　　　　　　　
Naruhiro Tsuboi, Toshihiko Matsuto, Takayuki Matsuo, Yasumasa Tojo, In-Hee Hwang
22nd Korea-Japan Joint International Session, The 2018 Spring Conference of the Korea Society of Waste Management, 10 May 2018
10 May 2018 - 10 May 2018

Current issues of the landfills in Palestine and how can we solve them　　　　　　　　　　　　　　　
Yasumasa TOJO
Opening Seminar of "SOLID WASTE MANAGEMENT SEMINAR FOR FUTURE ENGINEERS", 26 Mar. 2018, English, Public discourse
26 Mar. 2018 - 26 Mar. 2018, [Invited]

Urgent needs for reduction of waste being disposed of into the landfill- otherwise, the same situation continues-　　　　　　　　　　　　　　　
Yasumasa TOJO
Final Seminar of "The Project for Technical Assistance in Solid Waste Management in Palestine (Stage I), 18 Mar. 2018, English, Public discourse
18 Mar. 2018 - 18 Mar. 2018, [Invited]

焼却主灰中の難溶性態セシウムが結晶表面の非晶質相に濃集する機構の解明とその応用　　　　　　　　　　　　　　　
東條安匡
環境研究総合推進費平成２９年度終了課題成果報告会, 09 Mar. 2018, Japanese, Public discourse
09 Mar. 2018 - 09 Mar. 2018, [Invited]

下水汚泥焼却灰へのセシウム濃集機構の解明と除染廃棄物への応用　　　　　　　　　　　　　　　
小堀満代, 東條安匡, 松尾孝之, 松藤敏彦, 黄 仁姫
第25回衛生工学シンポジウム, 10 Nov. 2017, Japanese, Poster presentation
10 Nov. 2017 - 10 Nov. 2017

竪型ストーカ式焼却炉の運転特性評価　　　　　　　　　　　　　　　
山中康平, 黄 仁姫, 松尾孝之, 東條安匡, 松藤敏彦
第25回衛生工学シンポジウム, 10 Nov. 2017, Japanese, Poster presentation
10 Nov. 2017 - 10 Nov. 2017

焼却排ガス処理用の高性能消石灰製造に関する研究　　　　　　　　　　　　　　　
二上雄斗, 黄 仁姫, 松尾孝之, 東條安匡, 松藤敏彦
第25回衛生工学シンポジウム, 10 Nov. 2017, Japanese, Poster presentation
10 Nov. 2017 - 10 Nov. 2017

乾燥地における高濃度浸出水の合理的な処方法関す研究　　　　　　　　　　　　　　　
池田泰良, 東條安匡, 松尾孝之, 松藤敏彦
第25回衛生工学シンポジウム, 10 Nov. 2017, Japanese, Poster presentation
10 Nov. 2017 - 10 Nov. 2017

ものを自然に返すということ。−物質循環と廃棄物処理−　　　　　　　　　　　　　　　
東條安匡
北大セミナーinオホーツク, 07 Oct. 2017, Japanese, Public discourse
07 Oct. 2017 - 07 Oct. 2017

熱処理を介したアルミノケイ酸塩による廃棄物中セシウムの難溶性態化　　　　　　　　　　　　　　　
坂本さくら, 東條安匡, 松尾孝之, 松藤敏彦
第28回廃棄物資源循環学会研究発表会, 06 Sep. 2017, Japanese, Oral presentation
06 Sep. 2017 - 06 Sep. 2017

乾燥地域に位置する埋立地における廃棄物の乾燥過程に関する研究　　　　　　　　　　　　　　　
百瀬大峰, 東條安匡, 松尾孝之, 松藤敏彦
第28回廃棄物資源循環学会研究発表会, 06 Sep. 2017, Japanese, Poster presentation
06 Sep. 2017 - 06 Sep. 2017

ごみ焼却排ガス乾式処理での塩化水素と消石灰の反応メカニズム　　　　　　　　　　　　　　　
黄 仁姫, 須藤 航, 松尾孝之, 東條安匡, 松藤 敏彦
第28回廃棄物資源循環学会研究発表会, 06 Sep. 2017
06 Sep. 2017 - 06 Sep. 2017

海面処分場内水位以深に存在する焼却残渣埋立物におけるマンガンの動態解明(その３)　　　　　　　　　　　　　　　
東條安匡
廃棄物の適正処理・水処理に係る調査研究助成制度研究成果発表会, 19 Jul. 2017, Japanese, Public discourse

途上国、特に乾燥地域における廃棄物埋立の課題と技術協力の難しさ　　　　　　　　　　　　　　　
東條安匡
日本環境学会第43回研究発表会発表予稿集, 02 Jul. 2017, Japanese, Nominated symposium
02 Jul. 2017 - 02 Jul. 2017, [Invited]

Study of domestic scale anaerobic digestion practices in Sri Lanka　　　　　　　　　　　　　　　
Praween Madusanka, 東條安匡, 松藤敏彦
平成29年度廃棄物資源循環学会春の研究発表会, 02 Jun. 2017, English, Poster presentation
02 Jun. 2017 - 02 Jun. 2017

Future Research Needs for MBT in Asia Based on Literature Review Survey　　　　　　　　　　　　　　　
Eliza Canabal, 松藤敏彦, 東條安匡, 黄 仁姫
平成29年度廃棄物資源循環学会春の研究発表会, 02 Jun. 2017, English, Poster presentation

Evaluation of operational characteristics of vertical type incinerator　　　　　　　　　　　　　　　
Kohei Yamanaka, In-Hee Hwang, Takayuki Matsuo, Yasumasa Tojo, Toshihiko Matsuto, Yuji Yamada, Ryoji Sameshima
21th Korea-Japan Joint International Session, The 2017 Spring Conference of the Korea Society of Waste Management, 11 May 2017, English, Poster presentation
11 May 2017 - 11 May 2017

Experimental study on reaction of slaked lime and hydrogen chloride in dry scrubbing of flue gas generated from waste incinerator　　　　　　　　　　　　　　　
In-Hee Hwang, Wataru Sudo, Takayuki Matsuo, Yasumasa Tojo, Toshihiko Matsuto
21th Korea-Japan Joint International Session, The 2017 Spring Conference of the Korea Society of Waste Management, 11 May 2017, English, Poster presentation
11 May 2017 - 11 May 2017

Production of high-performance slaked lime for waste incineration flue gas treatment　　　　　　　　　　　　　　　
Yuto Futagami, In-Hee Hwang, Takayuki Matsuo, Yasumasa Tojo, Toshihiko Matsuto
21th Korea-Japan Joint International Session, The 2017 Spring Conference of the Korea Society of Waste Management, 11 May 2017, English, Poster presentation
11 May 2017 - 11 May 2017

Study on the accumulation mechanism of cesium into incineration ash of sewage sludge and its application to the decontamination waste　　　　　　　　　　　　　　　
Michiyo Kobori, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
21th Korea-Japan Joint International Session, The 2017 Spring Conference of the Korea Society of Waste Management, 11 May 2017, English, Poster presentation
11 May 2017 - 11 May 2017

Study on the feasible treatment process for highly concentrated landfill leachate generated in arid region　　　　　　　　　　　　　　　
Taira Ikeda, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
21th Korea-Japan Joint International Session, The 2017 Spring Conference of the Korea Society of Waste Management, 11 May 2017, English, Poster presentation
11 May 2017 - 11 May 2017

Future Research Needs for MBT in Asia Based on Literature Review Survey　　　　　　　　　　　　　　　
Eliza CANABAL, Yasumasa TOJO, In-Hee HWANG, Toshihiko MATSUTO
IWWG-ARB Symposium, 12 Apr. 2017, English, Oral presentation
12 Apr. 2017 - 12 Apr. 2017

海岸漂着物対策−特に災害に伴う流木（及び木くず）の処理について　　　　　　　　　　　　　　　
東條安匡
平成28年度守ろう美しい北海道！海ごみ・ポイ捨て防止大会シンポジウム, 13 Jan. 2017, Japanese, Public discourse
13 Jan. 2017 - 13 Jan. 2017, [Invited]

焼却主灰中の難溶性態セシウムが結晶表面の非晶質相に濃集する機構の解明とその応用　　　　　　　　　　　　　　　
東條安匡
平成28年度循環型社会形成推進研究発表会, 13 Dec. 2016, Japanese, Nominated symposium
13 Dec. 2016 - 13 Dec. 2016, [Invited]

INFLUENCE OF WEATHERING OF BOTTOM ASH ON THE LEACHING BEHAVIOR OF CESIUM　　　　　　　　　　　　　　　
Yasumasa Tojo, Saori Iwamoto, Mikako Ishii, Toshihiko Matsuto, Takayuki Matsuo
Sixth International Conference on Geotechnique, Construction Materials and Environment, 16 Nov. 2016, English, Oral presentation

乾燥地域を対象とした埋立地中廃棄物の乾燥化シミュレーション　　　　　　　　　　　　　　　
岡本侃大, 東條安匡, 松藤敏彦, 松尾孝之
第24回衛生工学シンポジウム, 15 Nov. 2016, Japanese, Poster presentation
15 Nov. 2016 - 15 Nov. 2016

海面処分場内水ポンド中Mn濃度低減を目的とした焼却灰層への浸出水循環果　　　　　　　　　　　　　　　
阿部知恵子, 東條安匡, 松藤敏彦, 松尾孝之
第24回衛生工学シンポジウム, 15 Nov. 2016, Japanese, Poster presentation
15 Nov. 2016 - 15 Nov. 2016

乾燥地域の蒸発依存型浸出水処理における悪臭改善に関する研究　　　　　　　　　　　　　　　
糸賀悠里香, 東條安匡, 松藤敏彦, 松尾孝之
第24回衛生工学シンポジウム, 15 Nov. 2016, Japanese, Poster presentation
15 Nov. 2016 - 15 Nov. 2016

災害時に発生する廃棄物の処理と課題−東日本大震災で経験されたこと−　　　　　　　　　　　　　　　
東條安匡
大規模災害時の災害廃棄物対策セミナー〜過去の教訓に学ぶ災害廃棄物処理計画策定等の対策について〜, 27 Oct. 2016, Japanese, Public discourse
27 Oct. 2016 - 27 Oct. 2016, [Invited]

最終処分場における物質変換と安定化について　　　　　　　　　　　　　　　
東條安匡
第27回廃棄物資源循環学会研究発表会特別セッション2「海面最終処分場の課題と役割-フェニックス事業を題材として-」, 28 Sep. 2016, Japanese, Nominated symposium
28 Sep. 2016 - 28 Sep. 2016, [Invited]

セシウムを表面に特異的に濃集する焼却主灰粒子の鉱物種の同定　　　　　　　　　　　　　　　
田村和樹, 東條安匡, 松尾孝之, 松藤敏彦
第27回廃棄物資源循環学会研究発表会, 27 Sep. 2016, Japanese, Oral presentation
27 Sep. 2016 - 27 Sep. 2016

実験および現地測定による準好気性埋立地内空気流動メカニズムに関する研究　　　　　　　　　　　　　　　
山田修平, 松藤敏彦, 東條安匡, 松尾孝之
第27回廃棄物資源循環学会研究発表会, 27 Sep. 2016, Japanese, Oral presentation
27 Sep. 2016 - 27 Sep. 2016

海面処分場内水位以深に存在する焼却残渣埋立物におけるﾏﾝｶﾞﾝの動態解明(その2)　　　　　　　　　　　　　　　
東條安匡, 阿部知恵子, 松尾孝之, 松藤敏彦
平成27年度「廃棄物・海域水環境保全に係る調査研究費助成制度」研究成果発表会要旨集, 20 Jul. 2016, Japanese, Public discourse
20 Jul. 2016 - 20 Jul. 2016

What is the appropriate strategy of landfill management in arid climate?　　　　　　　　　　　　　　　
Yasumasa Tojo, Takayuki Matsuo, Hirotaka Momose, Toshihiko Matsuto
The 9th Intercontinental Landfill Research Symposium, 13 Jun. 2016, English, Nominated symposium
13 Jun. 2016 - 13 Jun. 2016, [Invited]

Effect of leachate recirculation into incineration ash layer for lowering manganese concentration in leachate pond in sea landfill　　　　　　　　　　　　　　　
Chieko Abe, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
20th Korea-Japan Joint International Session, The 2016 Spring Conference of the Korea Society of Waste Management, 12 May 2016, English, Poster presentation
12 May 2016 - 12 May 2016

Reduction measures of odor generated from leachate treatment by evaporation in arid region　　　　　　　　　　　　　　　
Yurika Itoga, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
20th Korea-Japan Joint International Session, The 2016 Spring Conference of the Korea Society of Waste Management, 12 May 2016, English, Poster presentation
12 May 2016 - 12 May 2016

Review on the various Remediation Projects on Dumpsites in Developing Countries　　　　　　　　　　　　　　　
Harrison Odhiambo, Yasumasa Tojo, Toshihiko Matsuto
20th Korea-Japan Joint International Session, The 2016 Spring Conference of the Korea Society of Waste Management, 12 May 2016, English, Poster presentation
12 May 2016 - 12 May 2016

Simulation on the drying process of the waste in landfill under arid climate　　　　　　　　　　　　　　　
Kanta Okamoto, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
20th Korea-Japan Joint International Session, The 2016 Spring Conference of the Korea Society of Waste Management, 12 May 2016, English, Poster presentation
12 May 2016 - 12 May 2016

乾燥地域の廃棄物埋立地における有機物分解に関する研究　　　　　　　　　　　　　　　
百瀬大峰, Tahereh Malmir, 田村和樹, 東條安匡, 松尾孝之, 松藤敏彦
第23回衛生工学シンポジウム, 12 Nov. 2015, Japanese, Poster presentation
12 Nov. 2015 - 12 Nov. 2015

焼却底灰中のセシウムが結晶粒子周辺の非晶質相に濃集する機構の解明　　　　　　　　　　　　　　　
坂本さくら, 東條安匡, 松藤敏彦, 松尾孝之
第23回衛生工学シンポジウム, 12 Nov. 2015, Japanese, Poster presentation
12 Nov. 2015 - 12 Nov. 2015

乾燥気候地域に位置する都市ごみ埋立地での長期的な浸出水生成予測　　　　　　　　　　　　　　　
野村 弘, 東條安匡, 松尾孝之, 松藤敏彦
第26回廃棄物資源循環学会研究発表会, 02 Sep. 2015, Japanese, Oral presentation
02 Sep. 2015 - 02 Sep. 2015

焼却底灰における結晶粒子周辺の非晶質相へのセシウム濃集機構の解明　　　　　　　　　　　　　　　
坂本さくら, 東條安匡, 松尾孝之, 松藤敏彦
第26回廃棄物資源循環学会研究発表会, 02 Sep. 2015, Japanese, Poster presentation
02 Sep. 2015 - 02 Sep. 2015

Capturing Mechanism Of Cesium In Incineration Bottom Ash And Its Long-term Stability　　　　　　　　　　　　　　　
Yasumasa TOJO, Mikako ISHII, Saori IWAMOTO, Toshihiko MATSUTO, Takayuki MATSUO, Takayuki SHIMAOKA
3rd International Conference on Final Sinks, 23 Aug. 2015, English, Oral presentation
23 Aug. 2015 - 23 Aug. 2015

Municipal solid waste management in Tehran: the changes during the last five years　　　　　　　　　　　　　　　
T. Malmir, Y. Tojo
2nd International Conference on Waste Management and Environment (ICWME), 21 Aug. 2015, Japanese, Oral presentation

Basic Study On Wood Waste Degradation By White Rot Fungi And Synthesis Of Humic Substance　　　　　　　　　　　　　　　
Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
The 6th China-Japan Joint Conference on Material Recycling and Solid Waste Management, 06 Aug. 2015, English, Oral presentation
06 Aug. 2015 - 06 Aug. 2015

海面処分場内水位以深に存在する焼却残渣埋立物におけるマンガンの動態解明　　　　　　　　　　　　　　　
東條安匡, 田村和樹
平成26年度「廃棄物・海域水環境保全に係る調査研究費助成制度」成果発表会, 22 Jul. 2015, Japanese, Oral presentation
22 Jul. 2015 - 22 Jul. 2015

ものを自然に返すということ〜物質循環と廃棄物処理〜　　　　　　　　　　　　　　　
東條安匡
北海道滝川高等学校「オープンスクール」特別講演, 20 Jun. 2015, Japanese, Public discourse
20 Jun. 2015 - 20 Jun. 2015, [Invited]

安全・安心な埋立地の要件　　　　　　　　　　　　　　　
東條安匡
平成27年度廃棄物資源循環学会主催第1回セミナー「廃棄物処理と資源循環の課題と展望」, 29 May 2015, Japanese, Nominated symposium
29 May 2015 - 29 May 2015, [Invited]

Study on the accumulation mechanism of cesium in the amorphous phase around mineral particle in incineration bottom ash　　　　　　　　　　　　　　　
Sakura Sakamoto, Yasumasa Tojo, Toshihiko Matsuto, Takayuki Matsuo
2nd 3R International Scientific Conference, 21 May 2015, English, Poster presentation
21 May 2015 - 21 May 2015

Experimental study on the biodegradation process of organic waste in landfill under arid climate　　　　　　　　　　　　　　　
Hirotaka Momose, Tahereh Malmir, Kazuki Tamura, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
2nd 3R International Scientific Conference, 21 May 2015, English, Poster presentation
21 May 2015 - 21 May 2015

Prediction of leachate formation under arid climate by using water balance Model　　　　　　　　　　　　　　　
Tahereh Malmir, Hiroshi Nomura, Yasumasa Tojo, Toshihiko Matsuto, Takayuki Matsuo
2nd 3R International Scientific Conference, 21 May 2015, English, Poster presentation
21 May 2015 - 21 May 2015

Influence of landfilling works on the stabilization of inorganic waste residue in landfill　　　　　　　　　　　　　　　
Yasumasa TOJO, Kazuki TAMURA, Toshihiko MATSUTO, Takayuki MATSUO, Yugo ISOBE, Masatoshi TSUBAKI
2nd symposium of Asian Regional Branch of International Waste Working Group (IWWG-ARB), 13 Apr. 2015, English, Oral presentation

放射性セシウムの存在形態からみた長期挙動　　　　　　　　　　　　　　　
東條安匡, 石井三香子, 松尾孝之, 松藤敏彦, 岩本早織, 島岡隆行
廃棄物資源循環学会平成26年度第２回講演会−放射能汚染廃棄物処理に関する科学的理解−, 08 Dec. 2014
08 Dec. 2014 - 08 Dec. 2014, [Invited]

Leaching behavior of Cesium contained in incineration bottom ash and its long-term stability　　　　　　　　　　　　　　　
Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto, Takayuki Shimaoka
8th Intercontinental Landfill Research Symposium, 19 Oct. 2014, English, Poster presentation
19 Oct. 2014 - 19 Oct. 2014

埋立工法が中間処理残渣埋立物の安定化に及ぼす影響　　　　　　　　　　　　　　　
東條安匡, 田村和樹, 松尾孝之, 松藤敏彦, 磯部友護, 椿 雅俊, 小野雄策
第25回廃棄物資源循環学会研究発表会, 15 Sep. 2014
15 Sep. 2014 - 15 Sep. 2014

中間処理残さ主体埋立物の安定化遅延機構に関する生物学的な検討　　　　　　　　　　　　　　　
石垣智基, 鈴木和将, 磯部友護, 川嵜幹生, 山田正人, 東條安匡
第25回廃棄物資源循環学会研究発表会, 15 Sep. 2014
15 Sep. 2014 - 15 Sep. 2014

焼却主灰中難溶性セシウムの存在形態とその長期安定性に関する研究　　　　　　　　　　　　　　　
東條安匡, 石井美香子, 松尾孝之, 松藤 敏彦, 島岡 隆行
第25回廃棄物資源循環学会研究発表会, 15 Sep. 2014, Japanese, Oral presentation
15 Sep. 2014 - 15 Sep. 2014

Potential of Hydrogen Sulfide Formation from Fine Residue Generated from Mixed C&D Waste Sorting Process on Its Utilization　　　　　　　　　　　　　　　
Yasumasa Tojo, Yasuaki Ando, Takayuki Matsuo, Toshihiko Matsuto
Proceedings of the 5th China-Japan Joint Conference for the Community Formation on Material Recycling and Waste Management, 14 Jul. 2014
14 Jul. 2014 - 14 Jul. 2014

Influence of landfilling works on the stabilization of inorganic waste residue in landfill　　　　　　　　　　　　　　　
Kazuki Tamura, Yasumasa Tojo, Takayuki Matsuo, In-Hee Hwang, Toshihiko Matsuto
18th Korea-Japan Joint International Session, The 2014 Spring Conference of the Korea Society of Waste Management, 15 May 2014
15 May 2014 - 15 May 2014

Leaching behavior of cesium contained in incineration bottom ash　　　　　　　　　　　　　　　
Yasumasa Tojo, Ryo Kinoshita, Takayuki Matsuo, Toshihiko Matsuto
Annual Conference on Civil Engineering and Engineering, 15 Mar. 2014
15 Mar. 2014 - 15 Mar. 2014

大規模埋立実験槽の安定化に関する研究　　　　　　　　　　　　　　　
磯部友護, 渡辺洋一, 椿雅俊, 小野雄策, 東條安匡
第35回全国都市清掃研究・事例発表会, 23 Jan. 2014
23 Jan. 2014 - 23 Jan. 2014

安定化から見た管理型最終処分場の内部性状に関する研究　　　　　　　　　　　　　　　
磯部友護, 椿雅俊, 東條安匡
第34回全国都市清掃研究・事例発表会, 23 Jan. 2014
23 Jan. 2014 - 23 Jan. 2014

焼却灰の固結が重金属類の放出に与える影響　　　　　　　　　　　　　　　
野村 弘, 東條安匡, 松尾孝之, 黄 仁姫, 松藤敏彦
第24回廃棄物学会研究発表会, 02 Nov. 2013, Japanese, Poster presentation
02 Nov. 2013 - 02 Nov. 2013

焼却主灰中セシウムの存在形態と溶出挙動に関する研究　　　　　　　　　　　　　　　
木下 亮, 東條安匡, 松尾孝之, 黄 仁姫, 松藤敏彦, 島岡隆行
第24回廃棄物学会研究発表会, 02 Nov. 2013, Japanese, Poster presentation
02 Nov. 2013 - 02 Nov. 2013

風化促進試験による焼却主灰の風化変質がセシウムの挙動に与える影響　　　　　　　　　　　　　　　
東條安匡, 岩本早織, 松尾孝之, 松藤敏彦, 黄 仁姫, 島岡隆行
第24回廃棄物学会研究発表会, 02 Nov. 2013
02 Nov. 2013 - 02 Nov. 2013

金属化合物を添加した活性白土によるごみ焼却排ガス中有機塩素化合物の脱塩素化　　　　　　　　　　　　　　　
黄 仁姫, 金森 敦, 高橋 滋敏, 松尾 孝之, 松藤 敏彦, 東條 安匡
第24回廃棄物学会研究発表会, 02 Nov. 2013
02 Nov. 2013 - 02 Nov. 2013

風化促進試験による焼却主灰の風化変質がセシウムの挙動に与える影響　　　　　　　　　　　　　　　
東條安匡, 岩本早織, 松尾孝之, 黄仁姫, 松藤敏彦, 島岡隆行
第２回環境放射能除染研究発表会, 05 Jun. 2013, Japanese, Poster presentation

Study on the influence of solidification of MSWI bottom ash on the emission of easily mobile elements　　　　　　　　　　　　　　　
Yasumasa Tojo, Mikako Ishii, Toshihiko Matsuto, Takayuki Matsuo
2nd International Conference on Final Sinks, 16 May 2013, English, Poster presentation

Questionnaire survey on operation and maintenance of semi-aerobic landfill in Japan　　　　　　　　　　　　　　　
Xin Zhang, Toshihiko Matsuto, Toshihiko Matsuto, Takayuki Matsuo, Yasumasa Tojo
17th Korea-Japan Joint International Session, The 2013 Spring Conference of the Korea Society of Waste Management, 08 May 2013, English, Poster presentation
08 May 2013 - 08 May 2013

Influence of bottom ash solidification on leaching behavior of heavy metals　　　　　　　　　　　　　　　
Hiroshi Nomura, Yasumasa Tojo, Takayuki Matsuo, In-Hee Hwang, Toshihiko Matsuto
17th Korea-Japan Joint International Session, The 2013 Spring Conference of the Korea Society of Waste Management, 08 May 2013, English, Poster presentation
08 May 2013 - 08 May 2013

Dechlorination of organochlorine compound in flue gas from municipal solid waste incinerator using metal compound added activated clay　　　　　　　　　　　　　　　
In-Hee Hwang, Atsushi Kanamori, Shigetoshi Takahashi, Takayuki Matsuo, Yasumasa Tojo, Toshihiko Matsuto, Masaharu Ohue, Yoshitada Kakuta
17th Korea-Japan Joint International Session, The 2013 Spring Conference of the Korea Society of Waste Management, 08 May 2013, English, Poster presentation
08 May 2013 - 08 May 2013

Assessment of aerobic condition in a roofed landfill with semi-aerobic structure　　　　　　　　　　　　　　　
Xin Zhang, Toshihiko Matsuto, Takayuki Matsuo, Yasumasa Tojo
The 12th Expert Meeting on Solid Waste Management in Asia and Pacific Islands (SWAPI), 26 Feb. 2013
26 Feb. 2013 - 26 Feb. 2013

Dechlorination of mono-chlorobenzene in flue gas of municipal solid waste incinerator using activated clay　　　　　　　　　　　　　　　
Shigetoshi Takahashi, In-Hee Hwang, Takayuki Matsuo, Toshihiko Matsuto, Yasumasa Tojo
The 12th Expert Meeting on Solid Waste Management in Asia and Pacific Islands (SWAPI), 26 Feb. 2013
26 Feb. 2013 - 26 Feb. 2013

戻し堆肥を行う生ごみ堆肥化施設の処理特性と運転改善に関する研究　　　　　　　　　　　　　　　
西俊輔, 黄仁姫, 松藤敏彦, 松尾孝之, 東條安匡
第20回衛生工学シンポジウム, 04 Dec. 2012, Japanese, Poster presentation
04 Dec. 2012 - 04 Dec. 2012

埋立地における焼却灰固結機構の解明および洗い出し効果に与える影響　　　　　　　　　　　　　　　
石井三香子, 東條安匡, 松尾孝之, 黄仁姫, 松藤敏彦
第20回衛生工学シンポジウム, 04 Dec. 2012, Japanese, Poster presentation
04 Dec. 2012 - 04 Dec. 2012

廃棄物埋立地における多環芳香族炭化水素の好気性微生物分解に関する研究　　　　　　　　　　　　　　　
長谷川健太, 東條安匡, 松藤敏彦, 松尾孝之, 黄仁姫
第20回衛生工学シンポジウム, 04 Dec. 2012, Japanese, Poster presentation
04 Dec. 2012 - 04 Dec. 2012

活性白土を用いたごみ焼却排ガス中クロロベンゼンの脱塩素効果に関する研究
高橋滋敏, 黄仁姫, 松尾孝之, 松藤敏彦, 東條安匡
第23回廃棄物資源循環学会研究発表会, 22 Oct. 2012, Japanese
22 Oct. 2012 - 22 Oct. 2012

Feasibility of hydrothermal treatment for recovery of liquid fertilizer from scallop entrails　　　　　　　　　　　　　　　
In-Hee Hwang, Hiroya Aoyama, Takayuki Matsuo, Toshihiko Matsuto, Yasumasa Tojo
Proc. f the 23rd Annual Conference of Japan Society of Material Cycles and Waste Management, 22 Oct. 2012
22 Oct. 2012 - 22 Oct. 2012

各種粘土鉱物及び自然土壌を用いたセシウム・ストロンチウムの吸脱着反応　　　　　　　　　　　　　　　
加古賢一郎, 鈴木和将, 川嵜幹生, 東條安匡, 小野雄策
第23回廃棄物学会研究発表会, 22 Oct. 2012
22 Oct. 2012 - 22 Oct. 2012

焼却残渣埋立地における多環芳香族炭化水素の長期的な放出予測　　　　　　　　　　　　　　　
佐藤昌宏, 佐藤昌宏, 東條安匡, 松尾孝之, 松藤敏彦
第23回廃棄物学会研究発表会, 22 Oct. 2012
22 Oct. 2012 - 22 Oct. 2012

焼却主灰の固結化が塩類洗い出しに与える影響に関する基礎的検討　　　　　　　　　　　　　　　
東條安匡, 石井美香子, 松尾孝之, 松藤敏彦
第23回廃棄物学会研究発表会, 22 Oct. 2012
22 Oct. 2012 - 22 Oct. 2012

Verification by Coupled Simulation on the Effect of Vertical Gas Ventilation Pipes Installed for Promoting Waste Stabilization　　　　　　　　　　　　　　　
Yasumasa Tojo, Natsuki Kishizawa, Toshihiko Matsuto
Seminar and Workshop on Landfill Operation & Management in Tropical Country, 26 Aug. 2012, English, Invited oral presentation
[Invited]

最終処分場の中間覆土におけるセシウム・ストロンチウム吸脱着　　　　　　　　　　　　　　　
加古賢一郎, 村上大, 小野雄策, 鈴木和将, 東條安瓠
第34回全国都市清掃研究・事例発表会抄録集, 24 Jul. 2012
24 Jul. 2012 - 24 Jul. 2012

建設混合廃棄物破砕選別施設における疼下残渣の安定型処分または資源利用可能性の検討　　　　　　　　　　　　　　　
東條安匡, 安藤泰明, 松尾孝之, 松藤敏彦, 黄仁姫
平成24年度廃棄物資源循環学会研究討論会, 31 May 2012
31 May 2012 - 31 May 2012

埋立地における多環芳族炭化水素の長期的放出予測に関する研究　　　　　　　　　　　　　　　
佐藤昌宏, 東條安匡, 松尾孝之, 松藤敏彦
平成24年度廃棄物資源循環学会研究討論会, 31 May 2012
31 May 2012 - 31 May 2012

ホタテ内臓処理の現状および亜臨界水熱処理によるホタテ内臓からの液肥回収可能性の検討　　　　　　　　　　　　　　　
黄仁姫, 青山普哉, 松藤敏彦, 東條安匡, 松尾孝之
平成24年度廃棄物資源循環学会研究討論会, 31 May 2012
31 May 2012 - 31 May 2012

Investigation on the solidification process of MSW bottom ash and their effect on the washout　　　　　　　　　　　　　　　
Mikako Ishii, Yasumasa Tojo, Takayuki Matsuo, Hwang In-Hee, Toshihiko Matsuto
16th Korea-Japan Joint International Session, The 2012 Spring Conference of the Korea Society of Waste Management, 10 May 2012
10 May 2012 - 10 May 2012

Prediction on the long-term fate of polycyclic aromatic hydrocarbons in the landfill brought by municipal solid waste incineration residue　　　　　　　　　　　　　　　
Masahiro Sato, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
16th Korea-Japan Joint International Session, The 2012 Spring Conference of the Korea Society of Waste Management, 10 May 2012
10 May 2012 - 10 May 2012

Aerobic biodegradation of polycyclic aromatic hydrocarbons in landfill　　　　　　　　　　　　　　　
Kenta Hasegawa, Yasumasa Tojo, Toshihiko Matsuto, Takayuki Matsuo, Hwang In-Hee
16th Korea-Japan Joint International Session, The 2012 Spring Conference of the Korea Society of Waste Management, 10 May 2012
10 May 2012 - 10 May 2012

広域処理の難しさ（被災県の窮状―岩手県を例に）　　　　　　　　　　　　　　　
東條安匡
平成23年度廃棄物資源循環学会北海道支部セミナー, 10 Dec. 2011, Public discourse
10 Dec. 2011 - 10 Dec. 2011

廃棄物最終処分場におけるセシウムの吸脱着特性の評価　　　　　　　　　　　　　　　
鈴木和将, 川嵜幹生, 渡辺洋一, 加古賢一郎, 小野雄策, 遠藤和人, 山田正人, 東條安匡
全国都市清掃研究・事例発表会講演論文集, Dec. 2011
Dec. 2011 - Dec. 2011

東日本大震災発生後早期に生じた多くの課題（災害廃棄物を中心に）　　　　　　　　　　　　　　　
東條安匡
第19回衛生工学シンポジウム, 18 Nov. 2011
18 Nov. 2011 - 18 Nov. 2011

亜臨界水熱処理によるホタテ内蔵からの液肥回収に関する研究　　　　　　　　　　　　　　　
黄 仁姫, 阿部夏季, 松藤敏彦, 東條安匡, 松尾孝之
第22回廃棄物学会研究発表会, 03 Nov. 2011, Japanese, Oral presentation
03 Nov. 2011 - 03 Nov. 2011

建設混合廃棄物破砕選別残渣中の生物分解性有機炭素の分画と硫化水素生成能　　　　　　　　　　　　　　　
東條安匡, 斎藤隆生, 松尾孝之, 黄 仁姫, 松藤敏彦
第22回廃棄物学会研究発表会, 03 Nov. 2011, Japanese, Oral presentation
03 Nov. 2011 - 03 Nov. 2011

Resource Recovery from Mixed Construction and Demolition Waste　　　　　　　　　　　　　　　
Yasumasa Tojo
The 3rd China-Japan Joint Conference for the community formation on material recycling and waste management, 27 Aug. 2011
27 Aug. 2011 - 27 Aug. 2011

埋立廃棄物由来の溶存有機炭素への多環芳香族炭化水素の吸着特性　　　　　　　　　　　　　　　
佐藤昌宏, 東條安匡, 岩本早織, 松藤敏彦, 松尾孝之
平成23年度廃棄物資源循環学会研究討論会, 31 May 2011
31 May 2011 - 31 May 2011

硫化水素生成に寄与する建設混合廃棄物破砕選別残渣中の生物分解性有機物の定量　　　　　　　　　　　　　　　
東條安匡, 松尾孝之, 黄 仁姫, 松藤敏彦
平成23年度廃棄物資源循環学会研究討論会, 31 May 2011
31 May 2011 - 31 May 2011

Sorption characteristics of PAHs on the dissolved organic carbon derived from waste　　　　　　　　　　　　　　　
Saori Iwamoto, Yasumasa Tojo, Masahiro Sato, Toshihiko Matsuto, Takayuki Matsuo
15th Korea-Japan Joint International Session, The 2011 Spring Conference of the Korea Society of Waste Management, May 2011
May 2011 - May 2011

さまざまな有機性廃棄物のメタン発酵処理における炭素および肥料成分収支　　　　　　　　　　　　　　　
板倉彩夏, 松藤敏彦, 張会均, 東條安匡
第21回廃棄物学会研究発表会講演論文集, 04 Nov. 2010
04 Nov. 2010 - 04 Nov. 2010

都市ごみ焼却残渣からの多環芳香族炭化水素抽出溶媒の検討　　　　　　　　　　　　　　　
佐藤昌宏, 東條安匡, 倉田泰人, 松尾孝之, 松藤敏彦
第21回廃棄物学会研究発表会講演論文集, 04 Nov. 2010
04 Nov. 2010 - 04 Nov. 2010

建設混合廃棄物破砕選別施設における資源分離能に関する調査　　　　　　　　　　　　　　　
東條安匡, 安藤泰明, モンテロ アロンソ, 松尾孝之, 松藤敏彦, 山田 正人
第21回廃棄物学会研究発表会講演論文集, 04 Nov. 2010
04 Nov. 2010 - 04 Nov. 2010

Leaching Characteristics of Organic Compounds from Mixed C&D Waste Residue　　　　　　　　　　　　　　　
Alonso Montero, Yasumasa Tojo, Matsuo Takayuki, Matsuto Toshihiko, Masato Yamada
Proc. Of the 21st Annual Conference of Japan Society of Material Cycles and Waste Management, 04 Nov. 2010
04 Nov. 2010 - 04 Nov. 2010

Characterization of Fly Ash from Municipal Solid Waste Melting Furnace in Hokkaido
INANO HIROYUKI, ITABASHI KOJI, AKAZAWA TOSHIYUKI, HORIKAWA HIROYOSHI, TOMITA KEIICHI, OKADA TAKASHI, TOJO YASUMASA
北海道立総合研究機構工業試験場報告, 31 Aug. 2010, Japanese
31 Aug. 2010 - 31 Aug. 2010

Investigation of PAHs concentration in several incineration residues and simple estimation of their fate in landfill　　　　　　　　　　　　　　　
Masahiro Sato, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
Proceedings of the 6th Intercontinental Landfill Research Symposium, 08 Jun. 2010
08 Jun. 2010 - 08 Jun. 2010

Efficiency of resource recovery in mixed construction and demolition waste sorting process　　　　　　　　　　　　　　　
Yasuaki Ando, Yasumasa Tojo, Tosihiko Mastuto, Takayuki Matuo
Proceedings of the 14th Korea-Japan Joint International Session in the 2010 Spring Conference of the Korea Society of Waste Management, May 2010
May 2010 - May 2010

Experimental Study on the Effect of Forced Aeration on Carbon Fate in Landfill　　　　　　　　　　　　　　　
Natsuki Kishizawa, Yasumasa Tojo, Toshihiko Matsuto
Proceedings of the 14th Korea-Japan Joint International Sessionin the 2010 Spring Conference of the Korea Society of Waste Management, May 2010
May 2010 - May 2010

COMPARISON OF LEACHING CHARACTERISTICS OF SULFATE AND TOC FROM MIXED C&D WASTE RESIDUE, AGRICULTURAL FERTILIZERS AND SOIL CONDITIONERS　　　　　　　　　　　　　　　
A. Montero, Y. Tojo, T. Matsuo, T. Matsuto, M. Yamada
2ND INTERNATIONAL CONFERENCE ON WASTE ENGINEERING MANAGEMENT, ICWEM 2010, 2010, R I L E M PUBLICATIONS, English
2010 - 2010, Inoue (2005) reported that H2S generation in landfills significantly increases by disposal of waste gypsum board because it contains sulfate and organic matter Shredded residue generated from sorting facility of mixed construction and demolition (C&D) waste is also suspected of the source of sulfate and organic matter so that it became difficult to dispose of It into non controlled landfill However H2S generation was hardly identified in Inoue's study Then, it is deemed that potential of H2S generation from the residue must be evaluated from the viewpoint of releasing sulfate and organic matter Several fertilizers and soil conditioners contain both sulfate and organic matter Therefore, the purpose of this research is to investigate the leaching behavior of materials containing both sulfate and organic matter and to compare it against the residue s For this eleven samples including C&D waste residue fertilizers and soil conditioners will be used in a serial batch test, to evaluate its long-term leaching behavior For the obtained leachate, sulfate ton, TOC, VFA (acetic, lactic and propionic acid) and glucose were measured in order to determine how they are different among the samples

Landfill Management-2, Post-closure Care and its Completion　　　　　　　　　　　　　　　
Yasumasa TOJO
China-Japan Joint Conference for the Community Formation on Material Recycling and Solid Waste Management, Dec. 2009
Dec. 2009 - Dec. 2009

建設混合廃棄物からの石膏回収の可能性と選別残渣からの溶出ポテンシャル把握　　　　　　　　　　　　　　　
東條安匡, Alonso Montero, 松尾孝之, 松藤敏彦
「廃石こうボード」リサイクル シンポジウム, 26 Oct. 2009
26 Oct. 2009 - 26 Oct. 2009

埋立処分される廃棄物中の多環芳香族炭化水素 (PAHs) に関する研究　　　　　　　　　　　　　　　
佐藤昌宏, 東條安匡, 松尾孝之, 松藤敏彦
第20回廃棄物資源循環学会研究発表会, 17 Sep. 2009
17 Sep. 2009 - 17 Sep. 2009

Comparison of leaching characteristics of sulfate and TOC from shredded residue of mixed C&D waste and some recycled materials　　　　　　　　　　　　　　　
Jose Alonso Montero Alfaro, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto, Masato Yamada
Proceedings of the 20th Annual Conference of Japan Society of Material Cycles and Waste Management, 17 Sep. 2009
17 Sep. 2009 - 17 Sep. 2009

Study on the long-term carbon balance in an industrial solid waste landfill　　　　　　　　　　　　　　　
Hee Jong Kim, Toshihiko Matsuto, Yasumasa Tojo
Proc. Of the 20th Annual Conference of Japan Society of Material Cycles and Waste Management, 17 Sep. 2009
17 Sep. 2009 - 17 Sep. 2009

建設混合廃棄物破砕選別施設の物質フローに果たす役割と残渣品位の向上　　　　　　　　　　　　　　　
東條安匡
第17回衛生工学シンポジウム論文集, 29 Jun. 2009
29 Jun. 2009 - 29 Jun. 2009

Investigation on material separation of mixed construction and demolition waste by sorting process　　　　　　　　　　　　　　　
A. Montero, Y. Tojo, T. Matsuo, T. Matsuto, M. Yamada, H. Asakura, Y. Ono
Proceedings of the Second International Conference on Environmental Management, Engineering, Planning and Economics (CEMEPE 09), 2009
2009 - 2009

都市ごみ焼却施設における高温・低温二段階集じんによる塩類と重金属類の分離捕集に関する研究　　　　　　　　　　　　　　　
西本薫, 岡田敬志, 東條安匡, 松藤敏彦, 松尾孝之, 鮫島良二
第19回廃棄物学会研究発表会講演集, 19 Nov. 2008
19 Nov. 2008 - 19 Nov. 2008

Gypsum distribution in mixed C&D waste sorting process and its state of existence in residue　　　　　　　　　　　　　　　
Alonso Montero, Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto, Hiroshi Asakura, Masato Yamada, Yusaku Ono
Proceedings of the 19th Annual Conference of THe Japan Society of Waste Management Experts, 19 Nov. 2008
19 Nov. 2008 - 19 Nov. 2008

都市ごみ焼却施設における高温・低温二段階集じんによる塩類と重金属類の分離捕集に関する研究　　　　　　　　　　　　　　　
西本薫, 岡田敬志, 東條安匡, 松藤敏彦, 松尾孝之, 鮫島良二, 稲野浩行
第16回衛生工学シンポジウム, 13 Nov. 2008
13 Nov. 2008 - 13 Nov. 2008

重金属濃度の異なるごみ溶融飛灰のXPSによる化学状態分析　　　　　　　　　　　　　　　
稲野浩行, 板橋孝至, 岡田敬志, 東條安匡
第16回衛生工学シンポジウム, 13 Nov. 2008
13 Nov. 2008 - 13 Nov. 2008

Basic study on wood waste degradation by white rot fungi and synthesis of humic substance　　　　　　　　　　　　　　　
Junpei Kawata, Yasumasa Tojo, Toshihiko Matsuto
The 12th Korea-Japan Joint International Session, Proceedings of the 2008 Spring Conference of the Korea Society of Waste Management, May 2008
May 2008 - May 2008

Separation of salt and heavy metals by two-stage particulate collection in municipal solid waste incinerators　　　　　　　　　　　　　　　
Kaoru Nishimoto, Takashi Okada, Yasumasa Tojo, Toshihiko Matsuto, Takayuki Matsuo
The 12th Korea-Japan Joint International Session, Proceedings of the 2008 Spring Conference of the Korea Society of Waste Management, May 2008
May 2008 - May 2008

X線光電子分光分析法、遂次抽出法による溶融飛灰中Pbの化合物形態分析　　　　　　　　　　　　　　　
岡田敬志, 東條安匡, 稲野浩行, 板橋孝至
平成19年度土木学会北海道支部年次技術研究発表会, Feb. 2008
Feb. 2008 - Feb. 2008

産業廃棄物フローのデータベース化と制御方法の検討 (社会システムとして持続可能な最終処分:高規格最終処分とは)
山田 正人, 東條 安匡, 朝倉 宏
廃棄物学会研究討論会講演論文集, 2008, Japanese
2008 - 2008

ごみ溶融飛灰のXPSによる化学状態分析　　　　　　　　　　　　　　　
稲野浩行, 板橋孝至, 岡田敬志, 東條安匡
化学系学協会北海道支部2008年冬季研究発表会, Jan. 2008
Jan. 2008 - Jan. 2008

ガス抜き管内貯留水の水質による安定化モニタリングの可能性　　　　　　　　　　　　　　　
佐藤昌宏, 東條安匡, 松尾孝之, 松藤敏彦
第18回廃棄物学会研究発表会講演集, 19 Nov. 2007
19 Nov. 2007 - 19 Nov. 2007

埋め立て後長期間を経過した廃棄物の生物分解性を把握する手法に関する基礎的研究　　　　　　　　　　　　　　　
東條安匡, Pueboobpaphan Suthatip, 松尾孝之, 松藤敏彦
第18回廃棄物学会研究発表会講演集, 19 Nov. 2007
19 Nov. 2007 - 19 Nov. 2007

再生製品からの重金属溶出に環境因子が与える得る影響の把握　　　　　　　　　　　　　　　
水林晋哉, 東條安匡, 松藤敏彦, 肴倉宏史, 大迫政浩
第18回廃棄物学会研究発表会講演集, 19 Nov. 2007
19 Nov. 2007 - 19 Nov. 2007

高温集塵を採用した二段階捕集における焼却排ガス中重金属と塩類の分離　　　　　　　　　　　　　　　
牧志諒, 東條安匡, 岡田敬志, 松尾孝之, 松藤敏彦, 角田芳忠, 鮫島良二, 渡辺 純
第15回衛生工学シンポジウム, 08 Nov. 2007
08 Nov. 2007 - 08 Nov. 2007

Study on moisture storage and movement in a municipal solid waste landfill under works for promoting stabilization　　　　　　　　　　　　　　　
Masahiro Sato, Toshihiko Matsuto, Yasumasa Tojo, Takayuki Matsuo
The 2007 Environmental Societies Joint Conference, The 11th Korea-Japan Joint International Session, May 2007
May 2007 - May 2007

Study on production of humic substances in the process of biodegradation of organic matters　　　　　　　　　　　　　　　
Ai Shinbori, Yasumasa Tojo, Toshihiko Matsuto
The 2007 Environmental Societies Joint Conference, The 11th Korea-Japan Joint International Session, May 2007
May 2007 - May 2007

Case analysis on generation and management of solid waste generated by natural disaster　　　　　　　　　　　　　　　
Yasumasa Tojo, Yuko Inoue, Toshihiko Matsuto
The 2007 Environmental Societies Joint Conference, The 11th Korea-Japan Joint International Session, May 2007
May 2007 - May 2007

建設系リサイクル製品を対象とした環境安全性評価試験のシステム規格化研究　　　　　　　　　　　　　　　
肴倉宏史, 大迫政浩, 遠藤和人, 貴田晶子, 宮脇健太郎, 坂本広美, 東條安匡, 崎田省吾, 田野崎隆雄, 酒井伸一
全国環境研協議会廃棄物研究発表会, 2007
2007 - 2007

産業廃棄物適正処理のための物質収支モデルの作成　　　　　　　　　　　　　　　
浜田雄平, 東條安匡, 松尾孝之, 松藤敏彦, 角田芳忠
第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
20 Nov. 2006 - 20 Nov. 2006

埋立地由来の健康リスク評価モデルの作成　　　　　　　　　　　　　　　
花田茂久, 松藤敏彦, 東條安匡
第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
20 Nov. 2006 - 20 Nov. 2006

金属回収のための溶融炉運転条件による重金属揮発挙動に関する研究　　　　　　　　　　　　　　　
冨川博貴, 岡田敬志, 東條安匡, 松藤敏彦, 角田芳忠, 倉田昌明, 鮫島良二
第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
20 Nov. 2006 - 20 Nov. 2006

溶融飛灰中の塩素除去法に関する研究　　　　　　　　　　　　　　　
岡田敬志, 牧志涼, 東條安匡, 松藤敏彦
第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
20 Nov. 2006 - 20 Nov. 2006

建設資材として利用される再生製品の溶出挙動予測モデルの作成　　　　　　　　　　　　　　　
東條安匡, 松藤敏彦, 大迫政浩, 肴倉宏史
第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
20 Nov. 2006 - 20 Nov. 2006

再生製品を対象とした環境安全性評価試験の規格化研究（第１法）　　　　　　　　　　　　　　　
肴倉宏史, 大迫政浩, 宮脇健太郎, 崎田省吾, 東條安匡, 坂本広美, 遠藤和人, 田野崎隆雄, 貴田晶子, 酒井伸一
第17回廃棄物学会研究発表会講演集, 20 Nov. 2006
20 Nov. 2006 - 20 Nov. 2006

Effect of operational condition on the behavior of metals in melting furnace　　　　　　　　　　　　　　　
Takashi Okada, Hiroki Tomikawa, Yasumasa Tojo, Toshihiko Matsuto, Yoshitada Kakuta, Masaaki Kurata, Ryoji Samejima
4th International Conference on Combustion, Incineration/Pyrolysis and Emission Control, 26 Sep. 2006
26 Sep. 2006 - 26 Sep. 2006

Basic study on spontaneous ignition characteristics driven by low temperature oxidation in waste fuel storage　　　　　　　　　　　　　　　
Yoshitada Kakuta, Toshihiko Matsuto, Yasumasa Tojo, Takayuki Matsuo
4th International Conference on Combustion, Incineration/Pyrolysis and Emission Control, 26 Sep. 2006
26 Sep. 2006 - 26 Sep. 2006

Study on promotion of waste plastic recycling based on material flow analysis　　　　　　　　　　　　　　　
Yoshitada Kakuta, Toshihiko Matsuto, Yasumasa Tojo, S.Ohnuma
2nd International Conference on Environmental Science and Technology, 19 Aug. 2006
19 Aug. 2006 - 19 Aug. 2006

Investigation on characteristic of waste and leachate in semi-aerobic landfill under closure operation　　　　　　　　　　　　　　　
Yasumasa Tojo, Toshihiko Matsuo, Takayuki Matsuto
Proc. of the 4th Intercontinental Landfill Research Symposium, 14 Jun. 2006
14 Jun. 2006 - 14 Jun. 2006

Effect of operational condition on the behavior of heavy metals in melting furnace　　　　　　　　　　　　　　　
Takashi Okada, Hiroki Tomikawa, Yasumasa Tojo, Toshihiko Matsuo, Takayuki Matsuto
The 2006 Spring Conference of the Korea Society of Waste Management, May 2006
May 2006 - May 2006

安全安心な廃棄物処理を目指して−田中信壽先生が残した足跡−(企画セッション１）埋立地内の水分移動と長期モデリング　　　　　　　　　　　　　　　
東條安匡
第１３回衛生工学シンポジウム, 17 Nov. 2005
17 Nov. 2005 - 17 Nov. 2005

溶融飛灰中重金属の連続抽出による形態分析に関する研究　　　　　　　　　　　　　　　
岡田敬志, 鈴木賢, 東條安匡, 松藤敏彦
第１３回衛生工学シンポジウム, 17 Nov. 2005
17 Nov. 2005 - 17 Nov. 2005

『平成16年度廃棄物学会奨励賞』廃棄物層内における水分移動現象とその制御法に関する研究　　　　　　　　　　　　　　　
東條安匡
第16回廃棄物学会研究発表会講演集, 31 Oct. 2005
31 Oct. 2005 - 31 Oct. 2005

溶融飛灰からの金属回収に関する研究−溶融飛灰性状と水洗処理による山元還元の可能性−　　　　　　　　　　　　　　　
岡田敬志, 東條安匡, 松藤敏彦
第16回廃棄物学会研究発表会講演集, 31 Oct. 2005
31 Oct. 2005 - 31 Oct. 2005

埋立地からの浸出水漏水・溢流量推定モデルの作成　　　　　　　　　　　　　　　
花田茂久, 東條安匡, 松藤敏彦
第16回廃棄物学会研究発表会講演集, 31 Oct. 2005
31 Oct. 2005 - 31 Oct. 2005

産業廃棄物の埋立物に関する特性の調査と分類法の検討　　　　　　　　　　　　　　　
東條安匡, 牧志諒, 松藤敏彦, 松尾孝之, 角田芳忠
第16回廃棄物学会研究発表会講演集, 31 Oct. 2005
31 Oct. 2005 - 31 Oct. 2005

産業廃棄物埋立処分場搬入物の調査と埋立負荷の将来予測に関する研究　　　　　　　　　　　　　　　
筑紫康男, 東條安匡, 松藤敏彦
第16回廃棄物学会研究発表会講演集, 31 Oct. 2005
31 Oct. 2005 - 31 Oct. 2005

Ideal Feature of Landfill in Recycle Oriented Society - Japan's Strategy　　　　　　　　　　　　　　　
Yasumasa Tojo
WORKSHOP "LANDFILL MANAGEMENT IN SYRIA", 19 Sep. 2005
19 Sep. 2005 - 19 Sep. 2005

Forecasting long-term waste stabilization Process through the use of landfill simulator　　　　　　　　　　　　　　　
Yasumasa Tojo
NATIONAL SEMINAR ON UNIVERSITIES ENVIRONMENTAL ENGINEERING RESEARCH RESULTS (Bandung, Indonesia), 01 Aug. 2005
01 Aug. 2005 - 01 Aug. 2005

Characterization of organics and heavy metals in industrial waste in final disposal site　　　　　　　　　　　　　　　
Ryo Makishi, Yasumasa Tojo, Takayuki Matsuto, Toshihiko Matsuto, Nobutoshi Tanaka
The 2005 Spring Conference of the Korea Society of Waste Management, Korea, 12 May 2005
12 May 2005 - 12 May 2005

Effect of waste paper addition in thermophilic and dry methane fermentation of food waste　　　　　　　　　　　　　　　
Moon Chung-Man, Yasumasa Tojo, Takayuki Matsuto, Nobutoshi Tanaka, Toshihiko Matsuto
The 2005 Spring Conference of the Korea Society of Waste Management, 12 May 2005
12 May 2005 - 12 May 2005

Improvement of char in quality by chlorine removal and ash separation　　　　　　　　　　　　　　　
In-Hee Hwnag, Toshihiko Matsuto, Nobutoshi, Yasumasa Tojo
The 2005 Spring Conference of the Korea Society of Waste Management, 12 May 2005
12 May 2005 - 12 May 2005

Assessment of short-term and long-term gas generation potential of solid waste　　　　　　　　　　　　　　　
Suthatip Pueboobpaphan, Yasumasa Tojo, Toshihiko Matsuto
The 2005 Spring Conference of the Korea Society of Waste Management, May 2005
May 2005 - May 2005

都市ごみ埋立処分における量の大幅削減と質の適正化戦略に関する研究　　　　　　　　　　　　　　　
東條安匡
平成16年度廃棄物対策研究推進事業，第4回廃棄物対策研究発表会成果発表抄録集, 08 Dec. 2004
08 Dec. 2004 - 08 Dec. 2004

Investigation on Organic Load and Heavy Metal Content in Landfilled Waste　　　　　　　　　　　　　　　
Yasumasa Tojo, Yuhei HAMADA, Toshihiko MATSUTO, Takayuki MATSUO, Yoshitada KAKUTA, Nobutoshi TANAKA
The 3rd Intercontinental Landfill Research Symposium, 29 Nov. 2004
29 Nov. 2004 - 29 Nov. 2004

Numerical modeling of long-term behavior of waste in landfill　　　　　　　　　　　　　　　
Yasumasa Tojo, Nobutoshi TANAKA, Toshihiko MATSUTO, Masahiko OSAKO
The 3rd Intercontinental Landfill Research Symposium, 29 Nov. 2004
29 Nov. 2004 - 29 Nov. 2004

厨芥単独処理の高温・高固形物濃度メタン発酵の運転条件に関する検討　　　　　　　　　　　　　　　
石原和真, 東條安匡, 田中信壽, 松藤敏彦, 松尾孝之
第15回廃棄物学会研究発表会講演論文集, 17 Nov. 2004
17 Nov. 2004 - 17 Nov. 2004

炭化処理による産業廃棄物の資源化と埋立前処理の可能性　　　　　　　　　　　　　　　
佐々木通充, 松藤敏彦, 東條安匡, 角田芳忠, 松尾孝之, 田中信壽
第15回廃棄物学会研究発表会講演論文集, 17 Nov. 2004
17 Nov. 2004 - 17 Nov. 2004

溶融飛灰からの金属回収に関する研究−化学的金属回収法の評価・比較　　　　　　　　　　　　　　　
岡田敬志, 東條安匡, 田中信壽, 松藤敏彦
第15回廃棄物学会研究発表会講演論文集, 17 Nov. 2004
17 Nov. 2004 - 17 Nov. 2004

各種焼却飛灰のカーボン特性とDXN加熱処理特性　　　　　　　　　　　　　　　
角田芳忠, 松藤敏彦, 田中信壽, 東條安匡, 松尾孝之, 富川博貴, 増田孝弘
第15回廃棄物学会研究発表会講演論文集, 17 Nov. 2004
17 Nov. 2004 - 17 Nov. 2004

一般廃棄物最終処分場における搬入物の有機物・金属負荷の実態調査　　　　　　　　　　　　　　　
東條安匡, 爛田雄平, 田中信壽, 松藤敏彦, 松尾孝之, 角田芳忠
第15回廃棄物学会研究発表会講演論文集, 17 Nov. 2004
17 Nov. 2004 - 17 Nov. 2004

埋立物の土壌還元を目指す−焼却残渣の土壌化と長期挙動　　　　　　　　　　　　　　　
大迫政浩, 田中信壽, 東條安匡
廃棄物学会研究討論会講演論文集, 27 May 2004
27 May 2004 - 27 May 2004

Effect of parts recovery from End-of-Life Vehicle on the characteristics of Automobile Shredder Residue　　　　　　　　　　　　　　　
Nobuyuki NAKAMURA, Toshihiko MATSUTO, Yoshitada KAKUTA, Yasumasa Tojo, Takayuki MATSUO, Nobutoshi TANAKA
The 2004 Spring Conference of the Korea Society of Waste Management, 19 May 2004
19 May 2004 - 19 May 2004

Determination of organics and heavy metal contents in waste disposed of in MSW Landfill　　　　　　　　　　　　　　　
Yuhei HAMADA, Yasumasa Tojo, Toshihiko MATSUTO, Takayuki MATSUO, Yoshitada KAKUTA, Nobutoshi TANAKA
The 2004 Spring Conference of the Korea Society of Waste Management, 19 May 2004
19 May 2004 - 19 May 2004

Water Movement in Waste Landfill and its control　　　　　　　　　　　　　　　
Yasumasa Tojo, Nobutoshi TANAKA, Toshihiko MATSUTO, Takayuki MATSUO
COE International Seminar Proceedings, Water/Waste Metabolism and Groundwater pollution, 19 May 2004
19 May 2004 - 19 May 2004

都市ごみ溶融飛灰の水洗処理による金属濃縮に関する研究　　　　　　　　　　　　　　　
津山陽祐, 東條安匡, 田中信壽
第14回廃棄物学会研究発表会講演論文集, 22 Oct. 2003
22 Oct. 2003 - 22 Oct. 2003

廃棄物埋立地内の超長期的物質挙動予測モデルの開発　　　　　　　　　　　　　　　
東條安匡, 田中信壽, 大迫政浩
第14回廃棄物学会研究発表会講演論文集, 22 Oct. 2003
22 Oct. 2003 - 22 Oct. 2003

Study on Collection and Disposal Method of Incombustible Waste in Japan　　　　　　　　　　　　　　　
Takuya Ohno, Yasumasa Tojo, Toshihiko Matsuto, Takayuki Matsuo, Nobutoshi Tanaka, Yoshitada Kakuta
The 2003 Spring Conference of the Kore a Society of Waste Management, May 2003
May 2003 - May 2003

埋立地浸出水水平排水材(ジオシンセティックス)の通水性能に関する研究　　　　　　　　　　　　　　　
廣川有司, 田中信壽, 東條安匡
第13回廃棄物学会研究発表会講演論文集, 28 Nov. 2002
28 Nov. 2002 - 28 Nov. 2002

Unsaturated Hydraulic Characteristic of Various Residues from Intermediate Waste Treatment Process　　　　　　　　　　　　　　　
Yasumasa Tojo, Nobutoshi TANAKA, Toshihiko MATSUTO, Takayuki MATSUO
Proceedings of SARDINIA 2001 Eighth International Waste Management and Landfill Symposium, 2001, English, Oral presentation
2001 - 2001

埋立地内水分移動シミュレーションによる埋立構造と底部負荷水圧の関係　　　　　　　　　　　　　　　
東條安匡, 田中信寿, 松藤敏彦, 松尾孝之
第８回衛生工学シンポジウム論文集, 16 Nov. 2000
16 Nov. 2000 - 16 Nov. 2000

廃棄物・覆土互層構造での水分移動に関する実験的研究　　　　　　　　　　　　　　　
東條安匡, 田中信寿, 松藤敏彦, 松尾孝之, 古林祐正
土木学会第55回年次学術講演会講演概要集, 21 Sep. 2000
21 Sep. 2000 - 21 Sep. 2000

廃棄物の最終処分法，地域セミナー環境〜循環型社会を目指して　　　　　　　　　　　　　　　
東條安匡
北海道土木技術会コンクリート研究委員会, 2000
2000 - 2000

キャピラリーバリアを利用した廃棄物処分場排水システムの開発　　　　　　　　　　　　　　　
東條安匡, 松藤敏彦, 田中信壽, 松尾孝之, 相楽光宏
第７回衛生工学シンポジウム, 11 Nov. 1999
11 Nov. 1999 - 11 Nov. 1999

ごみ埋立地表面流の生成機構とその排除に関する研究　　　　　　　　　　　　　　　
毛利慎也, 東條安匡, 田中信寿
廃棄物学会第10回研究発表会, 26 Oct. 1999
26 Oct. 1999 - 26 Oct. 1999

各種廃棄物充填層の水分特性値の把握　　　　　　　　　　　　　　　
寺沢孝, 東條安匡, 田中信寿, 松藤敏彦, 松尾孝之
廃棄物学会第10回研究発表会, 26 Oct. 1999
26 Oct. 1999 - 26 Oct. 1999

廃棄物処分場底部の水分移動制御に関する研究　　　　　　　　　　　　　　　
東條安匡, 田中信寿, 松藤敏彦, 松尾孝之, 相楽光宏
第54回土木学会年次学術講演会（第?部）, Sep. 1999
Sep. 1999 - Sep. 1999

多層型底部集排水構造の排水効果に与える影響因子に関する実験的研究　　　　　　　　　　　　　　　
東條安匡, 田中信寿, 松藤敏彦, 松尾孝之, 菅原 淳
廃棄物学会第９回研究発表会講演論文集, 27 Oct. 1998
27 Oct. 1998 - 27 Oct. 1998

最終処分場浸出水のアンケート調査に基づくマクロ水分収支モデルの検討　　　　　　　　　　　　　　　
東條安匡, 田中信寿, 川口知司, 松藤敏彦, 松尾孝之
土木学会第53回年次学術講演会講演論文集, 10 Oct. 1998
10 Oct. 1998 - 10 Oct. 1998

キャピラリーバリアを利用した廃棄物処分場底部浸出水集排水構造に関する基礎的研究　　　　　　　　　　　　　　　
河野孝志, 田中信寿, 東條安匡
廃棄物学会第８回研究発表会講演論文集, 28 Oct. 1997
28 Oct. 1997 - 28 Oct. 1997

焼却灰充填層の２次元不飽和水分移動とそのモデル化　　　　　　　　　　　　　　　
東條安匡, 松藤敏彦, 田中信寿, 松尾孝之, 森田祥子
廃棄物学会第８回研究発表会講演論文集, 28 Oct. 1997
28 Oct. 1997 - 28 Oct. 1997

最終処分場の廃棄物層における浸透能の原位置測定　　　　　　　　　　　　　　　
東條安匡, 松尾孝之, 田中信寿, 松藤敏彦, 毛利慎也
土木学会第５２回年次学術講演会講演論文集, 10 Sep. 1997
10 Sep. 1997 - 10 Sep. 1997

Heavy Metal Concentrations in Peripheral Soil of MSW Landfill Site　　　　　　　　　　　　　　　
Yasumasa Tojo, Takayuki Matsuo, Toshihiko Matsuto
第１回韓・日廃棄物学会共同学術発表会, May 1997
May 1997 - May 1997

北海道大学工学部における物質収支とゴミ収集作業の現状　　　　　　　　　　　　　　　
田中信寿, 松藤敏彦, 東條安匡
廃棄物学会第７回研究発表会講演論文集, 07 Oct. 1996
07 Oct. 1996 - 07 Oct. 1996

焼却灰飛散による最終処分場周辺の重金属分布（第２報）　　　　　　　　　　　　　　　
松尾孝之, 東條安匡, 田中信寿他
土木学会第５１回年次学術講演会講演論文集, 17 Sep. 1996
17 Sep. 1996 - 17 Sep. 1996

焼却灰層内における含水率と不飽和移動水分の関係　　　　　　　　　　　　　　　
東條安匡, 田中信寿, 松藤敏彦, 松尾孝之, 三井奈保子
土木学会第５１回年次学術講演会講演論文集, 17 Sep. 1996
17 Sep. 1996 - 17 Sep. 1996

北海道における地震災害と廃棄物対策　　　　　　　　　　　　　　　
東條安匡
廃棄物学会災害廃棄物フォーラム講演論文集, 25 Apr. 1996
25 Apr. 1996 - 25 Apr. 1996

北海道大学工学部におけるゴミの発生・資源化の把握及び意識調査　　　　　　　　　　　　　　　
田中信寿, 松藤敏彦, 東條安匡
廃棄物学会第６回研究発表会講演論文集, 16 Oct. 1995
16 Oct. 1995 - 16 Oct. 1995

焼却灰の不飽和水分特性と不飽和透水係数の測定　　　　　　　　　　　　　　　
東條安匡, 田中信寿, 松藤敏彦, 松尾孝之, 前崎 巧
土木学会第５０回年次学術講演会講演論文集, 19 Sep. 1995
19 Sep. 1995 - 19 Sep. 1995

家庭系ゴミからの資源リサイクルに関する考察　　　　　　　　　　　　　　　
田中信寿, 松藤敏彦, 東條安匡
第４回化学工学・粉体工学北海道研究交流会発表要旨, 1995
1995 - 1995

焼却灰充填層における２次元不飽和浸透の実験的研究　　　　　　　　　　　　　　　
東條安匡, 酒井 勲, 田中信寿, 松藤敏彦, 松尾孝之
廃棄物学会第５回研究発表会講演論文集, 07 Nov. 1994
07 Nov. 1994 - 07 Nov. 1994

焼却灰飛散による最終処分場周辺の重金属分布　　　　　　　　　　　　　　　
東條安匡, 肴倉宏史, 田中信寿, 松藤敏彦, 松尾孝之
土木学会第49回年次学術講演会講演概要集, 15 Sep. 1994
15 Sep. 1994 - 15 Sep. 1994

廃棄物充填層の２次元不飽和浸透に関する研究　　　　　　　　　　　　　　　
東條安匡, 田中信寿, 松藤敏彦, 松尾孝之
廃棄物学会第４回研究発表会講演論文集, 13 Oct. 1993
13 Oct. 1993 - 13 Oct. 1993

札幌市における家庭系ごみ流れについて−発生・排出・収集原単位の推定とその影響要因−　　　　　　　　　　　　　　　
東條安匡, 田中信寿, 松藤敏彦
第１回化学工学・粉体工学北海道研究交流会発表要旨, 1992
1992 - 1992

家庭系ごみ排出原単位の推定　　　　　　　　　　　　　　　
松藤敏彦, 田中信壽, 東條安匡
衛生工学研究討論会講演集, 1992
1992 - 1992

廃棄物管理エキスパートシステムの知識ベース構築に関する基礎的研究　　　　　　　　　　　　　　　
東條安匡, 田中信寿, 松藤敏彦
廃棄物学会第２回研究発表会講演論文集, 28 Oct. 1991
28 Oct. 1991 - 28 Oct. 1991

繊維等を混入した小型模型盛土の降雨による崩壊実験　　　　　　　　　　　　　　　
川名泰之, 中村実和子, 東條安匡, 飯竹重夫, 金井太一
土木学会第16回関東支部技術研究発表会, 1988
1988 - 1988

A challenge for the establishment of the evaluation method of the penetration of minor harmful ions in concrete by using radio isotopes
Grants-in-Aid for Scientific Research
28 Jun. 2019 - 31 Mar. 2021
Yamada Kazuo
A separating quantification method for Cs and Sr simultaneous penetration of 10 μM in mortar based on the autoradiograph using imaging plate (IP) for radioisotopes (RI) has been developed. The separation was realized by using the energy difference between the beta-rays of Cs-137 and Sr-90. From the difference of the degree of attenuation when the samples were exposed under the shielded condition by aluminum plate of 0.1 mm were applied. For quantification, cement pastes containing RI whose concentration is known were fabricated separately as standards and those are exposed on IP simultaneously with mortar samples for evaluation and the signals from samples and standards were compared.
Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), National Institute for Environmental Studies, 19K21998

アルカリ長石による焼却飛灰中重金属の溶出抑制と最終安定化物化の実現　　　　　　　　　　　　　　　
科学研究費補助金（基盤研究（B））
2019 - 2021
文部科学省, 北海道大学, Principal investigator

Evaluation of Integrated waste management system based on MBT concept for municipal solid waste
Grants-in-Aid for Scientific Research
01 Apr. 2017 - 31 Mar. 2020
Matsuto Toshihiko
MBT is a combination of mechanical, biological, and thermal process as an integrated system. Two MBT systems were studied: combined system of Anaerobic Digestion (AD) and incineration, and Biodrying MBT which is followed by mechanical separation to recover solid fuel. Field study was conducted in real-scale facility, where solid waste and output material were sampled, and material balance and energy balance were clarified. Lab-experiment of biodrying was also carried out to construct moisture removal model. By taking two other system, incineration and RDF production system, four systems were evaluated in terms of energy recovery and CO2 emission. By using data obtained in our study and from literature review, material flow were drawn, and energy balance was estimated. Finally, sensitivity analysis of main parameters was carried out to find factors which should be improved for higher energy recovery rate.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 17H01917

指定廃棄物熱処理残渣中セシウムのアルミノ珪酸塩による捕捉・難溶性態化技術の確立　　　　　　　　　　　　　　　
環境研究総合推進費
2018 - 2020
環境省, 北海道大学, Principal investigator

焼却主灰中の難溶性態セシウムが結晶表面の非晶質相に濃集する機構の解明とその応用　　　　　　　　　　　　　　　
環境研究総合推進費
2015 - 2017
環境省, 北海道大学, Principal investigator

乾燥地域に位置する廃棄物埋立地の安定化シナリオの構築とその実現技術の開発　　　　　　　　　　　　　　　
科学研究費補助金（基盤研究（C））
2015 - 2017
文部科学省, 基盤研究（C）, 北海道大学, Principal investigator

Inspection methodology of solid waste landfill for knowledge develop of landfill operators
Grants-in-Aid for Scientific Research
01 Apr. 2013 - 31 Mar. 2016
Matsuto Toshihiko, TOJO Yasumasa
The main finding of this study is the air pathway in landfill and its mechanism. By use of gas tracer test in full size landfill, air is induced from leachate collection pipe, and it moves through solid waste layer, then discharged to passive gas vent. This mechanism was well matched with natural ventilation model. Because temperature and gas velocity can be index to know the magnitude of aeration around gas vent, extensive survey was conducted to know the degree of aeration in municipal and industrial solid waste landfill. Since gas flow was detected in a landfill in which leachate is accumulated at the bottom, gas vent is primarily important to provide exit and air can be induced from peripheral gas vents instead of leachate collection pipe.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 25281035

Identification of chemical form of cesium contained in incineration bottom ash and evaluation of its long term stability.
Grants-in-Aid for Scientific Research
2012 - 2013
TOJO Yasumasa
In this study, why cesium (Cs) contained in incineration bottom ash is hardly soluble, was investigated by focusing on its chemical form. By combusting simulated waste with stable Cs, artificially created bottom ash in which Cs content became high was created. From the observation by scanning electron microscope and polarization microscope, it was found that Cs accumulates at peripheral area of specific mineral. In its location, glassy amorphous phase formed and Cs is captured in it physically. The mineral is comprised of aluminum, silicon, and oxygen, mainly. To investigate the origin of the mineral, several inorganic and organic material was combusted with stable Cs and its ash was analyzed by the same method. However, the similar mineral was not identified. Clay mineral was too small when comparing to the mineral, which capture Cs in high concentration and was identified in artificially created ash.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, Principal investigator, Competitive research funding, 24510089

Evaluation of risk on hydrogen sulfide formation from recycled material and fine residue containing gypsum
Grants-in-Aid for Scientific Research
2009 - 2011
TOJO Yasumasa
Possibility of hydrogen sulfide formation was investigated for construction and demolition waste sorting residue, fertilizer, soil conditioner, and recycled material containing sulfate or gypsum, assuming that they are utilized in ordinary environment. Long-term leaching behavior of sulfate from residue was almost the same with other materials. Though leached amount of organic carbon from residue was higher than from others, it was only 1% of its original content. Occurrence of sulfate reduction in residue was prevented by maintaining high pH.
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (C), Hokkaido University, Principal investigator, Competitive research funding, 21510076

Carbon balance, gas and moisture movement in solid waste landfills for estimating stability
Grants-in-Aid for Scientific Research(基盤研究(B))
2007 - 2009
Toshihiko MATSUTO, 島岡 隆行, 吉田 英樹, Yasumasa TOJO, Takayuki SHIMAOKA, Hideki YOSHIDA
Understanding the conditions inside the landfills is critically important in terms of the estimation of long-term aftercare period. Carbon balance, and gas and water movement in landfill was estimated in this study. The most notable finding, the fact that passive gas vents can help to aerate landfilled waste as well as collect and release LFG, will help developing new design concept of landfill in the future.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 19360408

Upgrading numerical model for expressing long-term behavior of wastein landfill
Grants-in-Aid for Scientific Research(基盤研究(C))
2007 - 2008
Yasumasa TOJO
廃棄物埋立地での物質挙動を表現する数値計算モデルに有害化学物質の挙動を組み込むために, 有機物分解に伴って生成する腐植物質の挙動を実験的に追跡した. 易分解性物では分解初期に腐植物質の僅かな生成が確認されたものの, 継続的な腐植の生成は認められなかった. また白色腐朽菌による木質分解においてはリグニン減少は起こったものの腐植の生成を確認するには至らなかった. 埋立物中のPAH含有量を実測し, 長期動態モデルに組み込んだ結果, 分配係数の大きな物質は固相に長期残存することが明らかになった.
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Principal investigator, Competitive research funding, 19560816

Quality Improvement of Pyrolysis Char Derived From Various Kind of Solid Waste for Recycling
Grants-in-Aid for Scientific Research(基盤研究(B))
2005 - 2006
田中 信壽, Toshihiko MATSUTO, 東條 安匡, 恒川 昌美, 広吉 直樹, 伊藤 真由美, 角田 芳忠
In this study, sixteen kinds of char obtained from various sources including industrial waste were used for experiments. In order to use char as fuel, chlorine level should be reduced to avoid corrosion. Chlorine in char derived from MSW was characterized in terms of solubility. CO2 bubbling could reduce chorine to acceptable level for cement kiln use. Pulverization was proven to be ineffective in the dissolution of non water-soluble chlorine.Ash content is another fraction which should be lowered for fuel use of char. Ash rich fraction (r<125 um) was subjected to float-sink separation, fro...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 17360435

都市ごみ溶融飛灰中重金属の簡易抽出/高率濃縮を実現する溶融処理条件の確立
科学研究費補助金(若手研究(B))
2004 - 2006
東條 安匡
過去2年間で,実際の施設から採取した溶融飛灰中の金属濃縮法,飛灰中のPb,Znの形態分析法,溶融飛灰の金属含有量を向上させるための溶融条件の最適化に関して検討を行ってきた.本年度は,飛灰が捕集される部分に関して,高温集塵を採用して2段捕集とすることで,重金属が濃縮した飛灰と塩類を主体とした不溶化前処理不要な飛灰とに分離することを検討した.実験は,電気管状炉を用いて,飛灰を模擬した純物質からなる試料を揮発させ,その後段の500〜800℃に高温捕集部を,100℃の地点に低温捕集部を設けて飛灰の捕集を行った.まず1段捕集と2段捕集とでの捕集飛灰の品位を比較した結果,2段捕集とすることで,高温側に塩類が,低温側に重金属類が分配されることを確認した.次に高温捕集部の温度を変化させ,最も分離効率の高い設定温度域を検討した結果,高温捕集部を700℃〜800℃とすることで,Pbは90%以上が低温部で捕集され,高温部で僅かに捕集されたPbは,難水溶性であることを確認した.この結果は,低温部捕集灰は山本還元に,高温捕集灰は不溶化前処理を必要とせずに,埋立処分が可能であることを暗示するものである.次に,より多様な金属元素に対しても分離捕集の効果を検証するために,元素の揮発挙動に影響を与えるガス雰囲気,投入試料の元素組成(C,S,C1含有量)を変化させた実験を実施した.還元雰囲気とすることで,亜鉛,...
文部科学省, 若手研究(B), 北海道大学, Principal investigator, Competitive research funding, 16710042

Heavy Metal Flow in Solid Waste Management System and Evaluation of Environmental Effect
Grants-in-Aid for Scientific Research(基盤研究(C))
2003 - 2004
Toshihiko MATSUTO, 東條 安匡
Heavy metals in goods will be dispersed to the environment if end-of-life goods (solid waste) are treated inadequately. This will eventually result in (1)high environmental risk and (2)valuable resource loss. Heavy metals should therefore be given higher priority in solid waste management system. Treatment and recycling process of solid waste is last stage in goods' life cycle and also critical stage to determine whether heavy metals are released to the environment or not. So, it is significant which process is selected for solid waste management. This study aimed to estimate heavy metal fl...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Coinvestigator not use grants, Competitive research funding, 15560467

廃棄物の資源化適正処分プロセスの解析・定式化によるリサイクルシステム工学の展開
科学研究費補助金(萌芽研究)
2003 - 2004
田中 信壽, 東條 安匡, 松藤 敏彦
循環型社会を目指してさまざまな取り組みがなされているが、リサイクルの促進が大量消費・廃棄を大量リサイクルに変えるだけではないかとの懸念がある。廃棄物処理・資源化は製品ライフサイクルの最終段階であり、循環型社会の本来の目的である(1)環境負荷の低減、(2)天然資源の削減を、(3)適正なコストで実行できるシステムでなければならない。また部分的な適正化ではなく、(4)廃棄物の発生から資源化・処分に至るまでを安定的に運用できなければならない。本研究はこのような要求にこたえる「リサイクルシステム工学」のために実施した。廃棄物処理・資源化システムは、多様な廃棄物の発生、その分別、ごみ種ごとの処理選択肢の多さのため、非常に複雑である。本研究では、発生から最終処分までの各処理プロセスをモデル化し、(1)物質収支を定量的に記述し、(2)エネルギー収支、(3)電力、燃料等の用役投入、(4)コスト評価、(5)二酸化炭素排出量推定を行うプログラムを作成した。本プログラムは、分別方法、収集方法、分別されたごみの処理方法を任意に選択できるもので、さまざまな処理シナリオを環境影響、コストの点から評価できるものである。このプログラムを用い、資源化処理、堆肥化処理、メタン発酵、RDF製造、破砕選別処理、焼却、ガス化溶融、埋立、収集輸送の詳細な検討を行った。さらに、さまざまな処理シナリオを想定し、循環型社会にふ...
文部科学省, 萌芽研究, 北海道大学, Coinvestigator not use grants, Competitive research funding, 15656228

浸出水の高塩類化が最終処分場排水システムに与える影響
科学研究費補助金(奨励研究(A), 若手研究(B))
2001 - 2002
東條 安匡
昨年度の研究の結果,ジオシンセティック排水材に浸出水を長期間通水していると,間隙が閉塞し,通水能が低下していく事を確認した.本年度は,昨年度の研究を継統し,浸出水中のスケール生成ポテンシャルが排水材の通水能に与える影響について検討した.排水材の物理的目詰まり以外の主要な閉塞要因は,CaCO_3沈殿が排水材繊維に付着堆積することと考えられたが,このCaCO_3沈殿の生成式は,(Ca^<2+>+2OH^-)+(2H^++CO_3^<2->)→CaCO_3+2H_2Oで表され,この式が平衡状態になるときのpH(飽和pH[pHS])は,pHs=pCa^<2+>+pAlK+(pK_2'-pK_s')で表される.そこで,実験には浸出水のLIの異なる5種類の試料水(A, B, C, D, E)を作成して通水実験を行い,浸出水の水質による通水能の低下について検討した.試料水は毎週作成し,水質の分析を平行して行った.試料水のLIの経日変化は,(A)埋立地浸出水原水および(B)高Ca浸出水はおよそ2で推移し,常にCaCO_3沈殿の生成域にあった.(C)高pH浸出水および(D)焼却灰浸出水も常に正の値を示しCaCO_3沈殿の生成域にあったが,(C)がおよそ4で推移したのに対し,(D)は6週目までは2〜5の範囲で変動し,7週目以降は6以上と更に大きい値を示した.一方,(E)低pH浸出水は1〜5週目で...
文部科学省, 奨励研究(A), 若手研究(B), 北海道大学, Principal investigator, Competitive research funding, 13750519

Experimental study on Dispersion of incineration residue at MSW Landfill
Grants-in-Aid for Scientific Research(基盤研究(C))
2000 - 2001
Toshihiko MATSUTO, 東條 安匡
In Japan dioxin has been a big environmental concern. Incineration residue contains dioxin, and pose an environmental risk when dumped in a landfill. In this study, the possibility of dispersion of residues was studied by using lab-scale wind chamber, with moisture content as an main variable. Bottom ash from several MSW incinerators were injected in a wind chamber to simulate dumping practice in a landfill. Moisture content was main control variable in this study, and particle size of ash samples and dispersed ash captured by air samplers in the chamber were determined.Particle size and mo...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Coinvestigator not use grants, Competitive research funding, 12650541

効率的集排水を目的とした廃棄物処分場底部構造の開発
科学研究費補助金(奨励研究(A))
1997 - 1998
東條 安匡
廃棄物処分場からの浸出水漏洩は処分場の底部に浸出水が貯留し正の水圧が付加されることに起因する。本研究ではこの水分貯留を抑制するためにキャピラリーバリアを用いた排水構造を底部に設け,水分を迅速に排除する機構を開発した。上部層試料,下部層試料に種々の材料の組み合わせを採用し,数段階の勾配,降水量で小規模実験(幅60cm,奥行き15cm,高さ55cm),及び大規模実験(幅350cm,奥行き20cm,高さ95cm)を行い,排水効率とそれを左右する影響因子について検討した結果,バリアの効率には上部から供給される水量が最も大きな影響を与えることが明らかとなった。バリアが効率的に機能し,100%の水分を鉛直方向へ通過させることなく側方へ排除できる限界の水量は概ね100cm^3/h/cmであった。これは,例えば,距離20m程度の実規模を想定した場合,約0.5mm/h程度の水量に相当する。従って,処分場底部に到達する水量を,覆土による排除,廃棄物層内における水量変動のピークカットによって0.5m/h程度にまで低減させることができたならば,処分場底部においては,浸出水が遮水シートに到達することはなくなり,漏洩リスクは低減するものと考えられる。本研究では,さらに,バリアの排水機能を向上させるために二層境界部にジオテキスタイルを敷設した条件,及び下部引き込み深さを変化させた条件についても検討を行い,...
文部科学省, 奨励研究(A), 北海道大学, Principal investigator, Competitive research funding, 09750628

Environmental Impact from Urban Activities
Grants-in-Aid for Scientific Research(基盤研究(C))
1997 - 1998
Toshihiko MATSUTO, 東條 安匡
There are many possible sources of environmental impact in a city. In this study, all kinds of activities in urban area were categorized into four groups, and energy consumption, which is one of the major index of environmental load used in LCA research, was estimated for human activities in a city of Sapporo.The four groups defined in this research are : (A) household activity, (B) industrial & commercial activity , (C) transportation, and (D)environmental pollution control facilities. Citizen's life, A, are supported by the latter three. Water treatment, sewage water treatment, and solid ...
Ministry of Education, Culture, Sports, Science and Technology, 基盤研究(C), 北海道大学, Coinvestigator not use grants, Competitive research funding, 09650596

焼却灰飛散による最終処分場周辺の重金属分布に関する研究
科学研究費補助金(奨励研究(A))
1995 - 1995
東條 安匡
焼却灰中の微細な粒子は乾燥することによって大気中に舞い上がり、風などで輸送されて周辺環境へ飛散することが懸念される。本研究では実際に最終処分場の周辺土壌をサンプリングし、その金属含有量を調査した。周辺土壌を採取するために選定した処分場はA(焼却灰主体埋立地、即日覆土等はなされず、長期間露天投棄)、B(不燃ごみ主体埋立地、焼却灰割合13%、サンドイッチ方式埋立、即日覆土はあるものの覆土に焼却灰が混合されている)の2処分場である。両処分場ともに平地に造成されており、直接風の影響を受けるような立地条件にある。A処分場については93年に南東側で調査が行われているので、本研究では北西側にサンプリングフィールドをとった。B処分場ではAブロックの西側に調査地点を決め、試料を採取した。試料採取地点はA処分場で70地点、B処分場で54地点である。採取した試料は炉乾燥し、2mmふるい通過分について四分法によって代表試料を得た。それを塩酸抽出法によって金属を抽出した後、原子吸光法によって分析した。なお、各代表試料について3回の分析を行っている。定量した元素は、Ca,Zn,Cu.Na,K,Fe,Mn,Mgである。焼却灰中には一般の土壌と比較してCa,Zn,Cu,Naが2桁から3桁多く含まれている。一方Fe,Mg,Mn等は土壌と比較して含有量差はほとんどない。そのことを基に土壌の金属濃度分析結果を検討...
文部科学省, 奨励研究(A), 北海道大学, Principal investigator, Competitive research funding, 07750631

Developmental of Calculation Scheme for Municipal Solid Waste Management to Minimize Solid Waste Volume and Maximize Resource Recovery
Grants-in-Aid for Scientific Research(試験研究(B))
1994 - 1995
Nobutoshi TANAKA, 羽原 浩史, 手島 肇, 樋口 壮太郎, 東條 安匡, 松藤 敏彦
The object of this research is the construction of calculation scheme about mass and energy balance, cost evaluation, resource recovery and emission of hazardous materials for municipal solid waste management to minimize solide waste volume and maximize resource recovery. It must be comprehensive and be composed of all subsystems, such as waste generation, recycle, reduction, treatment and ultimate disposal.The following results are obtained.1.The calculation model for estimating the collection weight of some kind of solid wastes, such as combustible refuse, imcombustible refuse, bulky wast...
Ministry of Education, Culture, Sports, Science and Technology, 試験研究(B), 北海道大学, Coinvestigator not use grants, Competitive research funding, 06555160

廃棄物充填層における2次元不飽和水分移動及び溶質輸送に関する研究
科学研究費補助金(奨励研究(A))
1994 - 1994
東條 安匡
幅32cm、奥行き6cm、高さ85cmの直方体で、下部を7つのコンパートメントに分割したカラムを試作し、その中に、任意の高さに焼却灰を充填した。そして、その上部中央へ線上の降水を行い、下端の各流出口からの流出水量を時間経過と共に測定した。供給した水分は、焼却灰層内を鉛直下方に移動しながら横方向へも拡散しつつ浸透し、最終的に下端より流出して、2次元的な流出分布を形成する。このようにして、焼却灰層に於ける2次元の不飽和水分移動実験を実現した。実験は、充填層厚さ、降水量、充填密度等を様々に変化させて、同様の測定を繰り返した。そして、得られたこの2次元流出分布に対し、土壌の不飽和浸透理論の適用性の検討を試みた。まず、水分特性曲線、飽和透水係数を実測し、Van Genuchtenの方法で不飽和透水係数を推定した。そして、2次元に拡張したRichardsの不飽和浸透式をコンパートメントモデルを用いて解くことで、理論上の2次元流出分布を得た。その結果と実験値を比較すると、対照実験として用いた砂の場合は、比較的良好な一致を見たが、焼却灰の場合、全く一致しなかった。焼却灰の場合、計算値は実験値に対し、横方向拡散がほとんど進行せず、また、定常に至るまでの時間が10倍以上も長くなった。このような焼却灰層の場合に理論値が実験値と一致しなくなった理由として考えられたのが、不飽和透水係数の極端な小ささで...
文部科学省, 奨励研究(A), 北海道大学, Principal investigator, Competitive research funding, 06750577

難溶環境有害金属含有粉末およびその製造方法　　　　　　　　　　　　　　　
Patent right, 東條安匡, 国立大学法人北海道大学
特願2021- 11762, 28 Jan. 2021

飛灰の重金属類除去方法
Patent right, 田中 信壽, 松藤 敏彦, 東條 安匡, 杉本 富男, 山本 誠, 竹内 和則, 三井造船株式会社, 国立大学法人 北海道大学
特願2005-072610, 15 Mar. 2005
特開2006-255501, 28 Sep. 2006
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