Researcher Database

Kazuei Ishii
Faculty of Engineering Division of Environmental Engineering Division of Environmental Engineering

Researcher Profile and Settings


  • Faculty of Engineering Division of Environmental Engineering Division of Environmental Engineering

Job Title

  • Professor


J-Global ID

Research Interests

  • Renewable energy   Bioenergy   Final Disposal System   Biomass   リサイクルシステム   土壌・地下水汚染   廃棄物管理   Recycling system   soil and groundwater pollution   Waste Management   

Research Areas

  • Environmental science/Agricultural science / Environmental dynamics
  • Environmental science/Agricultural science / Environmental policy and society
  • Environmental science/Agricultural science / Environmental impact assessment
  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Safety engineering
  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Social systems engineering
  • Environmental science/Agricultural science / Environmental materials/recycling technology
  • Environmental science/Agricultural science / Environmental materials/recycling technology
  • Environmental science/Agricultural science / Environmental load reduction/restoration technology
  • Social infrastructure (civil Engineering, architecture, disaster prevention) / Civil engineering (environmental systems)

Academic & Professional Experience

  • 2020/10 - Today Hokkaido University
  • 2018/04 - Today Hokkaido University Faculty of Engineering Professor
  • 2010/04 - 2018/03 Faculty of Engineering, Hokkaido University Associate Professor
  • 2005 - 2007 大学院工学研究科北方圏環境政策工学専攻循環計画システム研究室 助手
  • 2005 - 2007 Research Associate,Graduate School of Engineering, Division of Engineering and Policy for Cold Regional Environment, Laboratory of Sound Material-cycle Systems Engineering
  • 2007 - 大学院工学研究科北方圏環境政策工学専攻循環計画システム研究室 助教
  • 2007 - Assistant Professor,Graduate School of Engineering, Division of Engineering and Policy for Cold Regional Environment, Laboratory of Sound Material-cycle Systems Planning
  • 1997 - 2005 大学院工学研究科環境資源工学専攻廃棄物管理工学分野 助手
  • 1997 - 2005 Research Associate,Graduate Shool of Engineering, Division of Environemt Resource Engineering, Labratory of Solid Waste Resources Managment Engineering


  • 1995/04 - 1997/03  Graduate School of Engineering, Hokkaido Universit  Doctoral Course of Sanitary Engineering
  • 1994/04 - 1995/03  Graduate School of Engineering, Hokkaido Universit  Division of Sanitary Engineering
  •        - 1993  Hokkaido University  School of Engineering
  •        - 1993  Hokkaido University  Faculty of Engineering

Association Memberships

  • 廃棄物学会   土木学会   地下水学会   

Research Activities

Published Papers

  • 牛ふんバイオガスプラントが地域環境・社会にもたらす効果の定性評価
    谷口裕太郎, 落合知, 石井一英, 佐藤昌宏
    土木学会論文誌 76 (6) II_35 - II_46 2020/10 [Refereed]
  • 廃棄物最終処分場における長寿命化及び気候変動への問題対応の実態把握
    小山文敬, 石井一英, 阿賀裕英, 佐藤昌宏, 落合知
    土木学会論文誌 76 (6) II_23 - II\34 2020/10 [Refereed]
  • Improvement of Biomass Fuel Properties for Rice Straw Pellets Using Torrefaction and Mixing with Wood Chips
    Ryosuke Kizuka, Kazuei Ishii, Satoru Ochiai, Masahiro Sato, Atsushi Yamada, Kouei Nishimiya
    Waste and Biomass Valorization 2020 [Refereed]
  • The Effectiveness of E-money Incentive Mechanism in Promoting Separation of Recyclables at Source in Malaysia
    Faisal Bin Arifin, Kazuei Ishii, Masahiro Sato, Satoru Ochiai
    Journal of Material Cycles and Waste Management 2020 [Refereed]
  • Strategy of landfilled waste reduction by a distributed materials recovery facility system in Surabaya, Indonesia
    Afif Faiq Muhamad, Kazuei Ishii, Masahiro Sato, Satoru Ochiai
    Waste Management & Research 2020 [Refereed]
  • 中小自治体の中長期廃棄物管理シナリオに関する研究-富良野生活圏を対象にして-
    高橋 恵介, 石井 一英, 阿賀 裕英, 佐藤 昌宏, 落合 知
    土木学会論文集G 75 (6) 2019/10 [Refereed]
  • Characteristics of wood pelletss mixed with torrefied rice straw as a biomass fuel
    Ryosuke Kizuka, Kazuei Ishii, Masahiro Sato, Atsushi Fujiyama
    International Journal of Energy and Environmental Engineering 10 357 - 365 2019 [Refereed]
  • A three-dimensional simulation of 1,4-dioxane contamination in an aquifer with a complex hydrogeological setting – application of a coupled estimation method
    ISHII Kazuei, fujiyama Atsushi, Sato Masahiro, Furuichi Toru
    Journal of solid waste technology and management 2019 [Refereed][Not invited]
  • 実態調査に基づく分別収集導⼊前後の⼀般廃棄物処理システムの評価−茨城県⼟浦市を対象として−
    勝見 慧, 藤山 淳史, 小泉 達也, 佐藤 昌宏, 石井 一英
    土木学会論文集G 74 (6) 39 - 50 2018 [Refereed][Not invited]
  • strategies of Waste Reduction in Small-Scale Municipalities- A case study in SHIMUKAPPU Village -
    山中 元貴, 石井 一英, 藤山 淳史, 佐藤 昌宏
    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 74 (6) II_27 - II_38 2018 [Refereed][Not invited]
  • 藤山 淳史, 石井 一英, 佐藤 昌宏, 丑丸 進太郎
    Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management 一般社団法人 廃棄物資源循環学会 28 257 - 257 2017 
    Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management 一般社団法人 廃棄物資源循環学会 28 425 - 425 2017 
  • 佐藤 昌宏, 垣内 大輝, 藤山 淳史, 石井 一英
    Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management 一般社団法人 廃棄物資源循環学会 28 427 - 427 2017 
    The stabilization of waste in landfill should be evaluated considering whole gaseous emission and spatial distribution of gas emission. Therefore it is required that a method of monitoring of landfill gas need less work and can indicate where is gas emission more than that in the other. In this study,  focusing on underground temperature-rising with waste decomposition,  the objective is to suggest an approach to determination of landfill gases monitoring points according an underground temperature. Concentration of carbon dioxide gas in a closed system final disposal facility gradually increased as time goes by. The whole gaseous emission rate calculated by that increment was 0.564 mol per minute under the assumption of time-stable gas flux. The whole gaseous emission estimated by spatial static method (IDW). The estimated value was near to the calculated value in the case of determination of sampling points with considering underground temperature than without considering. In addition, the spatial estimation was not affected by measuring of gas flux at the center of 2 m grid over area of low ground temperature. These results indicated that diction of sampling points considering distribution of underground temperature was effective to estimate gaseous emission with less work in a landfill site.
  • Ishii Kazuei, Aga Hirohide, Kitazaki Shunpei
    Proceedings of the Annual Conference of Japan Society of Material Cycles and Waste Management 一般社団法人 廃棄物資源循環学会 28 445 - 445 2017 
  • 北海道酪農地域における物質循環・経済から見たバイオガスプラント導入効果に関する研究
    北島弘, 石井一英, 藤山淳史, 佐藤昌宏
    土木学会論文集G 73 (6) 53 - 62 2017 [Refereed][Not invited]
  • 多主体多目的意思決定問題における評価者のグルーピングと変容の可視化に関する研究
    鷲尾卓, 藤山淳史, 石井一英, 佐藤昌宏
    土木学会論文集G 73 (6) 1 - 10 2017 [Refereed][Not invited]
  • Kazuei Ishii, Toru Furuichi, Atsushi Fujiyama, Shintaro Watanabe
    BIOMASS & BIOENERGY 94 155 - 166 0961-9534 2016/11 [Refereed][Not invited]
    Rice straw is a promising renewable energy source because it is abundantly available in Asia. This study conducted a case study of logistics cost analysis for rice straw pellets by considering all stages in the supply chain to define the main factors affecting the selling price of rice straw pellets: collection (job commission or employment of part-time workers), transportation, storage (vinyl greenhouses or storage buildings with larger capacity), pelletizing, and delivery to users with biomass boilers. The selling price was found to be strongly dependent on the production capacity because the investment cost for the pellet production facility had a significant effect of economies of scale. A production capacity of larger than 1500 t y(-1) is required for rice straw pellets to compete with wood pellets and fossil fuels in the studied Japanese context if the subsidy rate for the investment is 50%, part-time workers conduct the collection, and rice straw is stored in the storage buildings. Our sensitivity analysis also showed an economically feasible spatial scale: for example, rice straw should be collected within a 20 km radius and the users should be within a 38 km radius when the production capacity is 1500 t y(-1). In addition, other critical factors related to the collection of rice straw from the paddy fields and transportation of rice straw rolls to storage were identified as planning factors to further reduce the total logistics cost of rice straw pellets. (C) 2016 Elsevier Ltd. All rights reserved.
  • Jumana Al-Mallahi, Toru Furuichi, Kazuei Ishii
    WASTE MANAGEMENT 48 430 - 439 0956-053X 2016/02 [Refereed][Not invited]
    The high methane gas production potential of two phase olive milling waste (2POMW) makes its application to biogas plants in business an economical process to increase the productivity of the plants. The objective of this study was to investigate the appropriate conditions for the codigestion of NaOH-pretreated 2POMW with food waste. NaOH pretreatment can increase the methane production by increasing the soluble chemical oxygen demand (sCOD), but it may cause inhibition because of higher levels of alkalinity, sodium ion, volatile fatty acids and long chain fatty acids (LCFAs). Therefore, the first experimental phase of this study aimed to investigate the effect of different mixing ratios of 2POMW to food waste. A continuous stirred tank reactor experiment with different mixing ratios of 3%, 4.3%, 5.7% and 8.3% (2POMW: food waste) was conducted. NaOH pretreatment in the range of 6-20% was used. A mixing ratio up to 4.3%, when 10% NaOH pretreatment was used, caused no inhibition and increased methane production by 445.9 mL/g-VS(2POMW). For this mixing ratio an additional experimental phase was conducted with the 20% NaOH pretreatment as the 20% NaOH pretreatment had the highest sCOD. The methane gas production was increased by 503.6 mL/g-VS(2POMW). However, pH adjustment was required for applying this concentration of the high alkalinity 20% NaOH-pretreated 2POMW. Therefore, we consider using 10% NaOH pretreatment in a mixing ratio of 4.3% to be more applicable. The increase in methane gas production was correlated to the oleic acid concentration inside the reactors. The high oleic acid concentration of 61.8 mg/L for the 8.3% mixing ratio was responsible for the strong inhibition. This study showed that adjusting the appropriate mixing ratio of the NaOH-pretreated 2POMW could increase the electricity production of a reactor that regularly receives food waste. (C) 2015 Elsevier Ltd. All rights reserved.
  • OKADA Shintaro, ISHII Kazuei, FUJIYAMA Atsushi, FURUITHI Toru
    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 公益社団法人 土木学会 72 (6) 217 - 228 2016 [Refereed][Not invited]
     Because of municipal solid waste reduction according to depopulation or promotion of 3R, in the future, many local governments will face the difficulty in operation of municipal waste treatment systems, depending on their population size. On the other hand, biogas plants (BP) has been focused as a one of treatment systems for combustible waste in terms of effective energy recovery. So in this study, we investigated effective waste treatment systems in terms of an effective role of BP under the condition of waste reduction , especially focusing the efficiency of costs and energy. As a result, in small scale population, an operation of BP for only kitchen waste would be impossible. A mechanical-sieving and and dry-fermentation system in the middle scale would be effective if energy recovery is prioritized. A kitchen waste separation and wet- fermentation system in large scale would be cost-effective, although it might be necessary to consider a change of separate collection.
    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 公益社団法人 土木学会 72 (6) 257 - 268 2016 [Refereed][Not invited]
     There are many cases, in which introduction of renewable energy business has to be abandoned because of negative business balance. Independent distributed renewable energy can secure the energy required in case of emergency and can provide local benefits such as employment and local industry. However, such local benefits have not been evaluated quantitatively and have not been considered in business balance. This study developed a business planning model for renewable energy including biomass energy according to regional specific conditions, considering quantitative evaluation of local benefits. The model was applied to a case study, in which a local government manages a district heat supply system using woods, a biogas plant for cow manure and a photovoltaic power generation system. As a result, the local benefits such as energy security in case of emergency, employment and local industry found to be significant, although the monetary value of them depends on kinds of renewable energies. Add of the all local benefits to the business balance showed a positive value in the total balance of an account for the local government.
  • HARIYA Shogo, ISHII Kazuei, SATO Masahiro, FUJIYAMA Atsushi, FURUICHI Toru
    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 公益社団法人 土木学会 72 (6) 15 - 22 2016 [Refereed][Not invited]
     Energy utilization of rice straw with annual generation of about 9 millon ton has been required. Continuous combustion of rice straw pellets for a long time is difficult in household wood pellet stoves, which has been becoming popular, because the large amount of ash after combustion inhibits the continuous combustion easily. This study attempted to clarify a reason of the combustion inihibition and to investigate a possibility to use wood pellets mixed with rice straw for household wood pellet stoves. As a result, combustion inhibition was caused not by a clinker formation, but by accumulation of large-particle ash with the small bulk density. The volume of accumulated ash in case of wood pellets mixed with rice straw was smaller than that in case of co-combution of wood pellets and rice straw pellets with the same ratio of rice straw to woods. In addition, when the mixiture ratio of rice straw to woods was 10%, the wood pellets mixed with rice straw was burned continuously for a loger time than rice straw pellets, whose compostion was 100% rice straw.
    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 公益社団法人 土木学会 72 (6) 229 - 240 2016 [Refereed][Not invited]
     In the field of waste, resource use and energy recovery of waste is important. Especially, organic waste, such as kitchen waste and night soil sludge, have a high potential as circulation resources. This organic waste has been treated separately in incineration facilities and human waste treatment facilities up to now. But, as one of our future directions, we can consider them resources by using an integrated treatment system. This study examined an integrated treatment system in a sludge treatment center , to target a population in a small area. As a result, the integrated treatment system in the sludge treatment center was seen to be effective in terms of energy balance, environmental load and cost. Next this study considered the difference of treatment method, in particular comparing high-rate composting and me-thane fermentation. As a resulet, methane fermentation compared to high-ratee composting turned out to have high cost, but energy balance and environmental load became better.
  • Jumana Al-Mallahi, Toru Furuichi, Kazuei Ishii
    Journal of Solid Waste Technology and Management 41 (3) 315 - 324 1088-1697 2015/08/01 [Refereed][Not invited]
    A step of pretreatment prior to anaerobic digestion has been widely studied to enhance biogas production from lingocellulosic biomass. In this study, alkaline pretreatment and mechanical pretreatment by size reduction were tested on the two phase olive mill waste (TPOMW) in order to facilitate the degradation of lignocellulosic organic matter and thereafter the subsequent bioconversion to methane. For alkaline pretreatment, NaOH and CaO with concentrations in the range of 2.4 % to 30 % were tested. Following pretreatment, anaerobic digestion was conducted in batch mode for 26 days. Mechanical pretreatment did not increase the soluble compounds, measured as soluble chemical oxygen demand (sCOD), nor improved methane production. On the other hand, both CaO and NaOH were able to degrade part of the lignocellulosic organic matter to more easily degradable organic compounds. Especially NaOH was strong enough to solubilize part of the lignocellulosic organic matter sCOD was increased to 265 ± 49.5 g O2/kg after pretreatment with 30% NaOH compared with 74.1 g O2/kg for the untreated TPOMW. However, inhibition because of high initial alkalinity or high sodium ion concentration was recognized for high NaOH dosage. Six percent NaOH increased methane production by 20.3% and 11.2% compared with the untreated and the CaO pretreated TPOMW respectively. Although NaOH concentration of 6% was found to be reasonable for improving methane production without pH neutralization, considering a full scale reactor system receiving food waste as a main substrate and the NaOH-treated TPOMW as a co-substrate, the NaOH concentration of 20% might be optimum regarding the soluble COD concentration.
  • CCA木材の処理・リサイクル技術の実用化の検討~希硫酸抽出処理からのバイオエタノール化及び同の回収・廃酸処理~
    阿賀裕英, 古市徹, 石井一英
    都市清掃 68 (326) 388 - 393 2015 [Refereed][Not invited]
  • 池田勇太, 古市徹, 石井一英, 藤山淳史
    土木学会論文集G 71 (6) 405 - 414 2015 [Refereed][Not invited]
  • 東祐樹, 古市 徹, 石井一英, 藤山淳史, 翁御棋
    土木学会論文集G 71 (6) 229 - 240 2015 [Refereed][Not invited]
  • 堀川 拳, 古市 徹, 翁御棋, 石井一英, 藤山淳史
    土木学会論文集G 71 (6) 43 - 52 2015 [Refereed][Not invited]
  • Kazuei Ishii, Toru Furuichi
    WASTE MANAGEMENT 34 (12) 2621 - 2626 0956-053X 2014/12 [Refereed][Not invited]
    A large amount of rice straw is generated and left as much in paddy fields, which causes greenhouse gas emissions as methane. Rice straw can be used as bioenergy. Rice straw pellets are a promising technology because pelletization of rice straw is a form of mass and energy densification, which leads to a product that is easy to handle, transport, store and utilize because of the increase in the bulk density. The operational conditions required to produce high quality rice straw pellets have not been determined. This study determined the optimal moisture content range required to produce rice straw pellets with high yield ratio and high heating value, and also determined the influence of particle size and the forming temperature on the yield ratio and durability of rice straw pellets. The optimal moisture content range was between 13% and 20% under a forming temperature of 60 or 80 degrees C. The optimal particle size was between 10 and 20 mm, considering the time and energy required for shredding, although the particle size did not significantly affect the yield ratio and durability of the pellets. The optimized conditions provided high quality rice straw pellets with nearly 90% yield ratio, >= 12 MJ/kg for the lower heating value, and >95% durability. (C) 2014 Elsevier Ltd. All rights reserved.
  • 佐竹 佑太, 古市 徹, 翁 御棋, 石井一英, 藤山 淳史
    土木学会論文集G 70 (6) 11 - 21 2014 [Refereed][Not invited]
  • Kazuei Ishii, Toru Furuichi
    WASTE MANAGEMENT 33 (9) 1861 - 1869 0956-053X 2013/09 [Refereed][Not invited]
    Long term methane emissions from landfill sites are often predicted by first-order decay (FOD) models, in which the default coefficients of the methane generation potential and the methane generation rate given by the Intergovernmental Panel on Climate Change (IPCC) are usually used. However, previous studies have demonstrated the large uncertainty in these coefficients because they are derived from a calibration procedure under ideal steady-state conditions, not actual landfill site conditions. In this study, the coefficients in the FOD model were estimated by a new approach to predict more precise long term methane generation by considering region-specific conditions. In the new approach, age-defined waste samples, which had been under the actual landfill site conditions, were collected in Hokkaido, Japan (in cold region), and the time series data on the age-defined waste sample's methane generation potential was used to estimate the coefficients in the FOD model. The degradation coefficients were 0.050 1/y and 0.062 1/y for paper and food waste, and the methane generation potentials were 214.4 mL/g-wet waste and 126.7 mL/g-wet waste for paper and food waste, respectively. These coefficients were compared with the default coefficients given by the IPCC. Although the degradation coefficient for food waste was smaller than the default value, the other coefficients were within the range of the default coefficients. With these new coefficients to calculate methane generation, the long term methane emissions from the landfill site was estimated at 1.35 x 10(4) m(3)-CH4, which corresponds to approximately 2.53% of the total carbon dioxide emissions in the city (5.34 x 10(5) t-CO2/Y). (C) 2013 Elsevier Ltd. All rights reserved.
  • 不法投棄現場の1,4-ジオキサンのフィールドデータによる地下水汚染特性の解析
    西田憲一, 古市徹, 石井一英
    都市清掃 66 (312) 219 - 227 2013/03 [Refereed][Not invited]
  • Kazuei Ishii, Toru Furuichi, Yukari Nagao
    WASTE MANAGEMENT 33 (2) 445 - 455 0956-053X 2013/02 [Refereed][Not invited]
    Land use at contaminated sites, following remediation, is often needed for regional redevelopment. However, there exist few methods of developing economically and socially feasible land-use plans based on regional needs because of the wide variety of land-use requirements. This study proposes a new needs analysis method for the conceptual land-use planning of contaminated sites and illustrates this method with a case study of an illegal dumping site for hazardous waste. In this method, planning factors consisting of the land-use attributes and related facilities are extracted from the potential needs of the residents through a preliminary questionnaire. Using the extracted attributes of land use and the related facilities, land-use cases are designed for selection-based conjoint analysis. A second questionnaire for respondents to the first one who indicated an interest in participating in the second questionnaire is conducted for the conjoint analysis to determine the utility function and marginal cost of each attribute in order to prioritize the planning factors to develop a quantitative and economically and socially feasible land-use plan. Based on the results, site-specific land-use alternatives are developed and evaluated by the utility function obtained from the conjoint analysis. In this case study of an illegal dumping site for hazardous waste, the uses preferred as part of a conceptual land-use plan following remediation of the site were (1) agricultural land and a biogas plant designed to recover energy from biomass or (2) a park with a welfare facility and an athletic field. Our needs analysis method with conjoint analysis is applicable to the development of conceptual land-use planning for similar sites following remediation, particularly when added value is considered. (C) 2012 Elsevier Ltd. All rights reserved.
  • AGA Hirohide, FURUICHI Touru, ISHII Kazuei, TANIKAWA Noboru
    PROCEEDINGS OF ENVIRONMENTAL AND SANITARY ENGINEERING RESEARCH Japan Society of Civil Engineers 69 (6) 391 - 400 2185-6648 2013 [Refereed][Not invited]
    Systematic investigations were performed in order to establish a proper treatment and recycling system for CCA-treated wood waste. At first, a fact-finding survey on separation of CCA-treated wood waste was conducted by questionnaire for demolishers, sampling and analysis for samples of recycled material, and literature survey. The result estimated that about 71% of CCA-treated wood waste was not separated, and that the detected CCA components in the samples were over the level which might cause hazardous effects. In addition, we also pointed out the problems on incineration or landfilling of CCA-treated wood waste which are recognized proper treatments at the present time, and suggested the necessity for thorough separation and recycling system of CCA-treated wood waste. So, assuming fully separation of CCA-treated wood waste, extracting conditions using dilute sulfuric acid were investigated for removal of CCA-components from CCA-treated wood waste. As the result, about 90% of CCA-components were removed from CCA-treated wood chips with 0.5NH2SO4 under 50°C for 8hours, suggesting possibility of reasonable recycling of wood material and metal components.
  • TSUCHIYA Sho, FURUICHI Toru, ISHII Kazuei, WEN Yu-Chi, KIM SangYul
    PROCEEDINGS OF ENVIRONMENTAL AND SANITARY ENGINEERING RESEARCH Japan Society of Civil Engineers 69 (6) 329 - 336 2185-6648 2013 [Refereed][Not invited]
    Centralized biogas plants for proper treatment and effective utilization of cow liquid manure have contributions to improvement of environmental problem such as odor or lack of capacity in reservoirs and also have secondary effects on saving farmer's labor for transportation and application of manure, and on energy recovery. However, such biogas plants are not still introduced so much because of economic liability for dairy farmers. This study revealed actual situations of improper management of cow liquid manure by questionnaire survey for daily farmers in three regions, Hokkaido, where dairy farming is active. Conjoint analysis revealed that cow farmers consider "improvement of lack of capacity in reservoirs", "improvement of odor" and "improvement of excessive application of manure" as advantage. The evalution results were also reflected by differences in regional conditions, such as change in the number of cows and existence of crop or vegetable farmers. New strategies for spreading biogas plants are required considering regionally-different dairy farmer's needs for dairy farmers.
    PROCEEDINGS OF ENVIRONMENTAL AND SANITARY ENGINEERING RESEARCH Japan Society of Civil Engineers 6 (69) 301 - 312 2185-6648 2013 [Refereed][Not invited]
    This study developed scenarios of regional circulation systems considering existing biogas plants for kitchen waste and new RDF plants for papers, plastics, textiles and woods (wastes for fuel) in Soya region, Hokkaido, which includes 5 municipalities such as Wakkanai city, Rishiri and Rebun islands, etc. The scenarios were compared in costs, recycling rate and the amount of landfilled waste with the current situation. As a result, a regional recirculation scenario, where the kitchen waste in Rishiri and Rebun islands is transported by container and ferry to the existing biogas plant in Wakkanai city, and the wastes for fuels in whole Soya region are transported by container to a new centralized RDF plant in Wakkanai city and the produced RDF is used as a heat source at the existing paper factory in Asahikawa city, was evaluated in terms of costs, recycling rate, the amount of landfilled waste and feasibility in Soya region.
  • WENG Yu-Chi, FURUITHI Toru, ISHII Kazuei
    PROCEEDINGS OF ENVIRONMENTAL AND SANITARY ENGINEERING RESEARCH Japan Society of Civil Engineers 69 (6) 313 - 320 2185-6648 2013 [Refereed][Not invited]
    The planning and mamagement of final disposal sites play an important role in proper treatment/disposalofwaste. Inrecent decades, several functions, e.g., the stockyard of potential resources, the creation of urban ecological habitats, the temporal stock for disaster waste, are particularly highlighted with regard to the life-cycle values of final disposal sites. In this sense, the development of final disposal sites is required for modern society. Nonetheless, the construction plans are often objected by residents, i.e., the NIMBY symdrom, and the remaining capacity is decresing to a great extent in most regions. In order to tackle this problem, it is important to make integrated evaluations on the functions of final disposal sites for key stakeholders. Thereby, this study made an attempt to propose an integrated evaluation approach to estimate environmental economic values of final disposal sites, with a particular emphasis on the reclamination of final disposal sites. Besides, the established approach was applied to a case study in Moerenuma Park in Sapporo city. For the further improvement of the environmental value of reclamination of case study area, concrete policy proposals could be made through the corporation among the key stakeholders, and thus the NIMBY symdrom could be eliminated.
  • Numerical Simulation for Remediation Planning for 1, 4-Dioxane-Contaminated Groundwater at Kuwana Illegal Dumping Site in Japan Based on the Concept of Verified Follow Up
    Ramrav Hem, Toru Furuichi, Kazuei Ishii, Yu-Chi Weng
    Journal of Water Resource and Protection 5 699 - 708 2013 [Refereed][Not invited]
  • Ramrav Hem, Furuichi Toru, Ishii Kazuei, Yu-Chi Weng
    PROCEEDINGS OF ENVIRONMENTAL AND SANITARY ENGINEERING RESEARCH Japan Society of Civil Engineers 69 (6) 247 - 258 2185-6648 2013 [Refereed][Not invited]
    1,4-Dioxane migrates in groundwater with low sorption, low degradation, and low volatilization according to its physicochemical properties. 1,4-Dioxane migration therefore strongly depends on groundwater flow. Hydraulic conductivities, the most uncertain parameters and critical to groundwater flow, should be precisely determined. In a conventional approach, groundwater flow is estimated by calibration to optimize hydraulic conductivities, and then the calibrated groundwater flow is used for predicting 1,4-dioxane distribution considering other parameters such as source location and concentration. Although other parameters are properly set, 1,4-dioxane distribution cannot be always precisely predicted because the calibrated groundwater flow model does not perfectly present the real groundwater flow. Thus, the calibrated groundwater flow should be reevaluated to define the most suitable hydraulic conductivities considering 1,4-dioxane distribution.
     This study proposes a new approach with verification process of groundwater flow estimation for precisely predicting 1,4-dioxane distribution in groundwater. In this approach, several acceptable sets of hydraulic conductivities in term of groundwater heads are estimated by calibration and each groundwater flow is verified to match between calculated and observed 1,4-dioxane concentrations. The effectiveness of our new approach comparing to the conventional one was proved by a case study at an illegal dumping site in Japan where three aquifers have been contaminated by 1,4-dioxane for about 15 years. Eight acceptable sets of hydraulic conductivities of the three aquifers were determined by calibration using observed groundwater heads, and then verified to minimize the errors in 1,4-dioxane concentration. As a result, 1,4-dioxane distribution was predicted by our approach more precisely than the conventional approach.
  • Takuya Wada, Toru Furuichi, Kazuei Ishii
    Journal of Solid Waste Technology and Management 38 (4) 279 - 290 1088-1697 2012/11 [Refereed][Not invited]
    Proper countermeasures are needed for remediation of illegal dumping sites of hazardous ma-terials such countermeasures should be based on the distribution of both the waste layer and contaminated groundwater. However, because of limitations in the number of borehole points, the precise distribution of the waste layer and contaminated groundwater cannot be enough de-termined only by conducting conventional bore exploration. On the other hand, a low-resistivity area obtained by the electrical resistivity survey can detect both the waste layer and contami-nated groundwater. However, distinguishing between the waste layer and contaminated groundwater is impossible by the resistivity survey alone because the resistivity is a relative value. This study proposes an estimation method of the distribution of both the waste layer and contaminated groundwater in illegal dumping sites so that the limitations of each investigation method could be compensated. Especially, this study introduces analysis of geological charac-teristics such as the permeability of soils around the waste layer to distinguish between the waste layer and contaminated groundwater. As a result of applying our method to three actual illegal dumping sites, the distribution of both the waste layer and contaminated groundwater was estimated separately.
  • 伊黒千早, 古市徹, 石井一英, 金相烈
    土木学会環境システム研究論文集 68 II265 - 272 2012 [Refereed][Not invited]
  • 藤倉まなみ, 古市徹, 石井一英
    土木学会論文集G 68 (6) II165 - 176 2012 [Refereed][Not invited]
  • 西田憲一, 古市徹, 石井一英
    土木学会論文集G 67 (6) II489 - 500 2011 [Refereed][Not invited]
  • 本間隆之, 古市徹, 石井一英
    土木学会論文集G 67 (6) II415 - 426 2011 [Refereed][Not invited]
  • 家畜ふん尿の循環利用プロセスの窒素動態評価モデルの開発
    新田省吾, 古市徹, 石井一英, 谷川昇
    土木学会環境システム研究論文集 38 401 - 412 2010 [Refereed][Not invited]
  • 動脈系・静脈系連携によるエネルギー循環のための廃棄物バイオガス化システムの提案−石狩湾新港地域でのバイオガス直接利用システムの検討−
    五島典英, 古市徹, 石井一英, 谷川昇
    土木学会環境システム研究論文集 38 389 - 400 2010 [Refereed][Not invited]
  • ホームページを用いた双方向コミュニケーション手法の有効性に関する考察−青森・岩手県境不法投棄問題を例として−
    石井一英, 古市徹, 長尾由香利, 谷川昇
    土木学会環境システム研究論文集 38 151 - 162 2010 [Refereed][Not invited]
  • Tanikawa Noboru, Furuichi Toru, Ishii Kazuei, Iwasaki Kenji
    Journal of the Japan Society of Waste Management Experts Japan Society of Material Cycles and Waste Management 21 (1) 1 - 9 1883-5856 2010 [Refereed][Not invited]
    We propose a convenient method for monitoring hazardous gas based on the determination of ppm-level concentrations of CH4 in ambient air. The proposed method can be applied during the excavation of landfill or dumped waste at reclamation sites, and we investigated its usability in an actual field. A portable open-path type analyzer and a retroreflector were used to determine the CH4 concentration.
    The hazardous gas in landfill gas emitted from final disposal and illegal-dumping sites always contains CH4 and H2S occurring together, with the latter considered to be the main hazardous component. The maximum concentration ratio (H2S/CH4) at final disposal and illegal-dumping sites was expected to be about 10−1. This study showed clearly that the ambient CH4 concentration could be useful as an indicator for the monitoring of hazardous gas for the evaluation of potential danger.
    It was also shown that the proposed method could be useful for monitoring as a safety control at a reclamation site. This method works by comparing the measured ppm concentration levels of CH4 with a management value that is decided by considering the maximum concentration ratio (of the hazardous gas that was most harmful at the site, such as H2S/CH4), its acceptable concentration and a safety ratio.
  • SUWA Yoshihide, KOTAKE Shigeo, FURUICHI Toru, TANIKAWA Noboru, ISII Kazuei, IWASAKI Kenji
    Earozoru Kenkyu 日本エアロゾル学会 25 (4) 337 - 343 0912-2834 2010 
    Recently, waste disposal facilities are constructed as closed systems (CS disposal facilities), because of consideration on the influence to the surrounding environment. In these facilities, gaseous compornents such as methane, carbon dioxide, and hydrogen sulfite, are emitted from the waste. Large ventilation is required to ensure the safety of personnel working in the facilities by keeping the gas concentrations below the admitted level. However, it is difficult to evaluate the total emission rate of these gases, and the actual air exchange rate may be different from the set value because of natural ventilation and channeling of air flow in large space such as CS disposal facilities. The authors have developed a method to evaluate both emission rate and air exchange rate through the measurement of gas concentration change. Furthermore, the effect of natural ventilation caused by outside wind and that caused by temperature difference were compared. Finally, the possibility of environmental improvement by natural ventilation was studied.
  • Kazuei Ishii, Toru Furuichi, Noboru Tanikawa
    WASTE MANAGEMENT 29 (2) 513 - 521 0956-053X 2009/02 [Refereed][Not invited]
    Bottom ash from Municipal solid waste incineration (MSWI) is a main type of waste that is landfilled in Japan. The long-term elution of organic matter from the MSWI bottom ash layers is a concern because maintenance and operational costs of leachate treatment facilities are high. In closed system disposal facilities (CSDFs), which have a roof to prevent rainfall from infiltrating into the waste layers, water must be supplied artificially and its quantity can be controlled. However, the quantity of water needed and how to apply it (the intensity, period and frequency) have not been clearly defined. In order to discuss an effective watering plan, this study proposes a new washout model to clarify a fundamental mechanism of total organic carbon (TOC) elution behavior from MSWI bottom ash layers. The washout model considers three phases: solid, immobile water and mobile water. The parameters, including two mass transfer coefficients of the solid-immobile water phases and immobile-mobile water phases, were determined by one-dimensional column experiments for about 2 years. The intensity, period and frequency of watering and other factors were discussed based on a numerical analysis using the above parameters. As a result, Our Washout model explained adequately the elution behavior of TOC from the MSWI bottom ash layer before carbonation occurred (pH similar to 8.3). The determined parameters and numerical analysis suggested that there is a possibility that the minimum amount of water needed for washing out TOC per unit weight of MSWI bottom ash layer could be determined, which depends on the two mass transfer coefficients and the depth of the MSWI bottom ash layer. Knowledge about the fundamental mechanism of the elution behavior of TOC from the MSWl bottom ash layer before carbonation occurs, clarified by this study, will help ail effective watering plan in CSDFs. (c) 2008 Elsevier Ltd. All rights reserved.
  • Kazuei Ishii, Toru Furuichi, Noboru Tanikawa, Masaru Kuboshima
    JOURNAL OF HAZARDOUS MATERIALS 162 (1) 328 - 332 0304-3894 2009/02 [Refereed][Not invited]
    We are developing a bioreactor system for treating dioxin-contaminated soil or water using the dioxin-degrading fungus, Pseudallescheria boydii (P. boydii). In order to design the bioreactor system, this study estimated the rate at which R boydii degraded 2.3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD), which is the most toxic of the dioxins. The experimental results showed that P. boydii degraded 2,3,7,8-TCDD during its logarithmic growth phase, using glucose as a carbon source for growth, and that the growth of P. boydii was not affected by 2,3,7,8-TCDD concentrations usually found at contaminated sites. These results were then used to apply successfully an existing mathematical model to the degradation of 2,3,7,8-TCDD by P. boydii. This allowed an estimation of the rate of degradation of 2,3,7,8-TCDD by P boydii that can be used in the design of the bioreactor system. (C) 2008 Elsevier B.V. All rights reserved.
  • Kazuei Ishii, Toru Furuichi
    Journal of Solid Waste Technology and Management 35 (1) 35 - 50 1088-1697 2009 [Refereed][Not invited]
    We proposed an improved numerical design method for the remediation of contaminated sites based on a sensitive tracer test using rare earth metals such as holmium. The numerical design method was then applied to a real contaminated site, where immediate counter-measures were required because of detection of high arsenic concentration in a spring near a sea line outside the site. First, the sensitive tracer test using insium, europium and holmium under natural gradient condition revealed the groundwater flow path from the three suspected source points to the sea line, and analysis of the breakthrough curve for each tracer compounds determined the parameters, such as the hydraulic conductivity and dispersivity. A site-specific model representing the distribution of aercenic concentration in groundwater identified the source points, responsible for the contamination of the spring, and revealed that contaminated groundwater might flow out of the site boundary. A vertical wall was designed to prevent contaminants spreading from the site, and the change in the arsenic concentration after the construction of the vertical wall was predicted. The prediction had similar tendency to the actual decrease in arsenic concentration over a two-year monitoring phase. Consequently, our numerical design based on the sensitive tracer test predicted that the contamination level in the groundwater around the spring would continuously decrease toward remediation.
  • Rokuta Inaba, Tohru Furuichi, Toshihiro Komatsu, Noboru Tanikawa, Kazuei Ishii
    WASTE MANAGEMENT 29 (1) 214 - 223 0956-053X 2009/01 [Refereed][Not invited]
    In Japan, most farm animal excreta has been stored directly on farmland. Runoff from this storage has often Caused water pollution. Biogasification is anticipated as an important technology to manage excreta properly, but complex problems hinder its introduction. Economic aspects of management have been especially difficult for dairy farmers. For this study, structural problems regarding introduction of biogasification into dairy farming were identified. Subsequently, a desirable system of dairy farming including biogasification was suggested, and an evaluation model of the financial balance was constructed. A case study using current financial balances of several systems of dairy farming wits evaluated using the constructed model and actual data. The systems were based on several policy alternatives including the suggested system mentioned above. Results show that a farmer can obtain sufficient income from a system featuring centralization of dairy housing and biogasification facilities and coordinated management by over six farmers. (C) 2008 Elsevier Ltd. All rights reserved.
  • Michael Angelo B. Promentilla, T. Furuichi, K. Ishii, N. Tanikawa
    JOURNAL OF ENVIRONMENTAL MANAGEMENT 88 (3) 479 - 495 0301-4797 2008/08 [Refereed][Not invited]
    The Analytic Network Process (ANP) has been proposed to incorporate interdependence and feedback effect in the prioritization of remedial countermeasures using a hierarchical network decision model, but this approach seems to be incapable of capturing the vagueness and fuzziness during value judgment elicitation. The aim of this paper is to present an evaluation method using a fuzzy ANP (FANP) approach to address this shortcoming. Triangular fuzzy numbers (TFN) and their degree of fuzziness are used in the semantic scale as human judgment expressed in natural language is most often vague and fuzzy. The method employs the alpha-cuts, interval arithmetic and optimism index to transform the fuzzy comparative judgment matrix into set of crisp matrices, and then calculates the desired priorities using the eigenvector method. A numerical example, which was drawn from a real-life case study of an uncontrolled landfill in Japan, is presented to demonstrate the process. Results from the sensitivity analysis describe how the fuzziness in judgment could affect the solution robustness of the prioritization method. The proposed FANP approach therefore could effectively deal with the uncertain judgment inherent in the decision making process and derive the meaningful priorities explicitly from a complex decision structure in the evaluation of contaminated site remedial countermeasures. (C) 2007 Elsevier Ltd. All rights reserved.
    Journal of the Japan Society of Material Cycles and Waste Management Japan Society of Material Cycles and Waste Management 19 (1) 72 - 79 1883-1648 2008 [Refereed][Not invited]
    We propose a self-restoring liner system that uses colloidal solution for landfill sites. The colloidal solution is filled in a pressurized state between a double liner. This prevents the leak of exudation water and immediately forms new liner around a damaged area when liner damage occurs. As a result, the function of the system is restored naturally.
    We carried out some basic experiments with colloidal solution of about 3-5% weight ratio. As a result of these experiments, we were able to confirm that mud cake and a penetration deposition layer were formed around a liner damage area by the colloidal solution and that the function of the system was restored.
    In addition, we confirmed the long-term continuity of colloidal particle dispersion in the colloidal solution and the fluidity performance of the colloidal solution in the double liner.
    From these experimental results, we were able to confirm the possibility of practical application of this liner system that uses colloidal solution.
    Journal of the Japan Society of Material Cycles and Waste Management Japan Society of Material Cycles and Waste Management 19 (3) 182 - 190 1883-1648 2008 [Refereed][Not invited]
    The characteristics of three currently operating kitchen-waste biogasification facilities, including the amounts of methane (CH4) generated, their environmental burdens, and the economic efficiency of each were investigated. The amounts of CH4 generated at kitchen-waste biogasification facilitis from untreated kitchen waste and from kitchen waste that which undesirable materials were removed ware 67-92m3N/ton and 83-103m3N/ton, respectively. This wade clear that evaluations of amounts of CH4 generated from kitchen waste should consider CH4 measurements errors and the ratios of undesirable materials and carbon in the kitchen waste.
    We found that concern for reduction of odor emissions was necessary and that the properties of the liquid fermentation residue depended on the change in the weight of the kitchen waste during treatment, the type of methane fermentation system used and the type of pretreatment method used on the liquid fermentation residue at kitchen-waste biogasification facilities.
    The amounts of electricity generated by the biogas were less than the total amounts of electricity consumed in the kitchen-waste biogasification facilities. The running costs, not including labor, of a facility that releases treated liquid fermentation residue into the sewage system and treats odor with the ordinary deodorization methods were estimated to be about 7500-9600yen/ton kitchen waste. In a facility that releases treated liquid fermentation residue into a river, treats odor with an advanced deodorization method and adopts a dual-fuel type generator, the running costs, not including labor, were estimated to be about 14500yen/ton of kitchen waste.
  • TANIKAWA Noboru, FURUICHI Toru, ISHII Kazuei, SHIMIZU Shinta
    Journal of the Japan Society of Material Cycles and Waste Management Japan Society of Material Cycles and Waste Management 19 (2) 141 - 149 1883-1648 2008 [Refereed][Not invited]
    A questionnaire survey was conducted of farmers in Hokkaido who had installed automatic-turning composting facilities (composting facilities) or biogasification facilities for treating cattle excreta. The purpose of this survey was to investigate the characteristics of the farmers and the advantages and disadvantages of these facilities, as well as to clarify the effects of their installation for the farmers.
    Most of the farmers who installed composting or biogasification facilities had large farms feeding about twice as many cattle as the average in Hokkaido. Their motivations for installing these facilities were determined to be, first, the need to solve cattle excreta management problems and, second, the existence of financial support for installing such facilities.
    Many farmers answered that the advantages of installing composting or biogasification facilities were that they could produce solid or liquid manure that was of high quality and low odor, and that the processing of cattle excreta in these facilities was stable even in areas with cold winters. They also said that the high construction and maintenance costs of the systems and the labor required for their operation were disadvantages. The construction and maintenance costs of the biogasification facilities were less than those of the composting facilities. There was only a small difference in the increased labor time required for management of cattle excreta between composting and biogas-ification facilities. The average increase in time for both types of facility was about 20%, although about twice as many cattle farmers who had installed biogasification facilities said that the process was laborious, compared with those who had installed composting facilities. The reason for this was assumed to be that farmers found the maintenance of the biogasification facilities more troublesome because they have many parts that need to be maintained and some repairs require experts.
  • Kazuei Ishii, Toru Furuichi
    JOURNAL OF HAZARDOUS MATERIALS 148 (3) 693 - 700 0304-3894 2007/09 [Refereed][Not invited]
    We developed a conceptual feasible design of bioreactor system for treatment of dioxin-contaminated soils that uses the dioxin-degrading fungus Pseudallescheria boydii (P. boydii) we had isolated. The dioxin-degradation conditions in bioreactor treatment was established by clarifying the inhibiting factors for the growth of P. boydii using both real contaminated and laboratory prepared soils mixed with fly ash. In addition, ethanol extraction process as post-treatment methods for the remaining dioxins, and the sterilization conditions of P. boydii, i.e., a weakly pathogenic fungus, in the residue was investigated. The better growth conditions of P. boydii were found to be chloride ion concentration of less than 10 g/L and a pH of less than 9. Under these conditions, 73 10 pg-TEQ/g of the soil was treated to 2860 pg-TEQ/g by the bioreactor process, and the dioxin concentration was further decreased to 580 pg-TEQ/g by ethanol extraction, resulting to total removal ratio of 92%. Furthermore, development of an effective sterilization method for living P. boydii in the residue increased the applicability of our bioreactor system for practical use in dioxin-contaminated sites. (C) 2007 Elsevier B.V. All rights; reserved.
  • FURUICHI Toru, TANIKAWA Noboru, ISHII Kazuei
    Material Cycles and Waste Management Research Japan Society of Material Cycles and Waste Management 18 (3) 172 - 181 0917-0855 2007/05/31 
    European countries are currently promoting Waste-to-Energy programs whereby various forms of energy can be produced from waste as a means of preventing global warming, reducing the amount of landfill waste, and developing alternative energy sources for oil.
    This paper focuses on European trends in energy recovery, with waste incineration and biogasification being used as measures for putting the Waste-to-Energy concept to work. The background of domestic waste management in Europe and laws regarding energy are introduced here, along with the current status of domestic waste management and utilization of renewable energy. The paper also includes reporting on three biogasification facilities and a mechanical-biological treatment facility, actually doing Waste-to-Energy in Europe at present. The paper also suggests ways in which the promotion of Waste-to-Energy can be taken up in Japan.
  • FURUICHI Toru, TANIKAWA Noboru, ISHII Kazuei, KIM SangYul
    Material Cycles and Waste Management Research Japan Society of Material Cycles and Waste Management 18 (2) 77 - 83 0917-0855 2007/03/31 
    A new concept is presented for addressing illegal dumping, with an aim to establish a sound material-cycle society. Firstly, the background and issues relating to the illegal dumping of waste are discussed. Secondly, the paper introduces the Laboratory of Illegal Dumping Engineering Solution (IDES) at Hokkaido University which also address these problems. Lastly, issues such as final disposal system and "community-based land use" (Kankyo Saisei) within the framework of a "sound and sustainable material-cycle society" (Junkangata Kyosei Shakai) are described.
    In order to address illegal dumping problems and promote "sound sustainability" (Kyoseika) final disposal system, it is necessary to take a comprehensive and systematic approach that not only considers engineering (i.e., scientific investigation, prediction and analysis tools, integrated treatment technology for restoration, etc.), but also takes into account the social aspects (i.e., social and economic angles, environmental education, participation by local residents, etc.) . Cooperation among industries, universities, and governments is essential as well; and in this context, IDES is also expected to play a central role in supporting such wide cooperation.
  • TANIKAWA Noboru, FURUICHI Toru, ISHII Kazuei, TODA Yuuki, KOMATSU Toshihiro, INABA Rokuta
    Journal of the Japan Society of Material Cycles and Waste Management Japan Society of Material Cycles and Waste Management 18 (1) 30 - 36 1883-1648 2007 [Refereed][Not invited]
    We investigated the characteristics of ordinary domestic wastes, including kitchen waste, that had been disposed of directly in a landfill site about 1.5 years and about 23 years earlier. We selected the most suitable of the materials in the landfill site for biogasification treatment and investigated the characteristics of the biogas that were produced by them were investigated by batch experimental tests.
    The proportion (by wet weight) of substances that could not be classified (residuals) was from 37% to 49% and the total proportion of waste that was classified as residuals, paper or plastics was between 80% and 90%. We considered the residuals and the paper to be the most suitable materials for biogasification treatment as they contained between 5% and 14% carbon while the plastics contained little easily degradable organic matter.
    We estimated the expected methane generation from the landfilled waste based on the results of the batch tests, assuming that the biogas was generated from only the paper and the residuals. The estimated values were significantly greater than the amount of methane typically generated from livestock excreta in biogasification facilities. This demonstrated that biogasification is a useful reclamation technology for landfill sites where ordinary domestic wastes, including kitchen waste, have been disposed of directly applied to landfill.
  • Tanikawa Noboru, Furuichi Toru, Ishii Kazuei, Oda Kimiko
    Journal of Japan Society of Air Pollution Japan Society for Atmospheric Environment 42 (4) 253 - 259 1341-4178 2007 [Refereed][Not invited]
    We determined the atmospheric dinitrogen monoxide (N2O) concentration in an open type domestic waste landfill site and a closed system type domestic waste landfill site by continuously using an extractive N2O analyzer with infrared absorption (infrared N2O analyzer) and a non-extractive open-path type N2O analyzer, with infrared absorption (open-path N2O analyzer), and investigated the increase of nitrous oxide concentration caused by landfill gas.
    When the wind was blowing at over 1-2 m/s, the N2O concentrations ranged from about 0.30 to 0.33 ppm, and they were similar to ordinary concentrations in the urban area. However, when it was blowing at less than 1 m/s or was calm continuously, N2O emitted from the landfill site could increase the atmospheric N2O concentrations.
    The open-path type N2O analyzer could show a rough change of N2O concentration in a small-scale landfill site. Moreover, the N2O generating speed per unit reclamation area in the landfill site, where residue of crushed incombustible and large size wastes were landfilled, was estimated to be about 60μg/m2·h from the measured increase rate of N2O concentration.
  • ISHII Kazuei, FURUICHI Toru, TERAYAMA Takeshi, TANIKAWA Noboru, INABA Rokuta
    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) Japan Society of Civil Engineers 63 (4) 294 - 303 1880-6082 2007 [Refereed][Not invited]
    This study investigated a desirable garbage recycling system consisting attributes such as number of times for garbage collection, collection methods, charge and so on, using a conjoint analysis as multi-attribute utility analytical method, which differs from conventional questionnaire investigations to evaluate each attribute independently. Especially, the conjoint analysis was applied to residents in three local municipalities which are different in regional conditions such as the current treatment way of garbage, the urban form such as urban or rural areas, and the type of habitation. As the result, willingness to pay (WTP) for the number of garbage collection time was high for residents living in collective housings. In a large city, biogasification which can recover energy tended to be more desirable than composting.
  • TANIKAWA Noboru, FURUICHI Toru, ISHII Kazuei, SHIMIZU Shinta
    Journal of the Japan Society of Material Cycles and Waste Management Japan Society of Material Cycles and Waste Management 18 (6) 392 - 399 1883-1648 2007 [Refereed][Not invited]
    We have conducted a questionnaire survey in three areas of Hokkaido on the following two matters : 1) the present status of the compliance of cattle farmers with the livestock excreta control law, and 2) their awareness of automatic spiral agitation composting and biogasification facilities for livestock excreta, which are both effective facilities for achieving the purpose of the law. The survey results revealed problems and possible strategies in promoting the appropriate treatment of livestock excreta and its effective utilization.
    The ratio of cattle farmers using law-abiding composting facilities (LACF) as mere storage facilities for livestock excreta was about 30-60%. On the other hand, about 30% of farmers leave livestock excreta in the open before they spread it on their farms. Thus, it is important to further promote effective use of LACF and appropriate management of excreta outside of LACF.
    Most of the cattle farmers have no intention of constructing automatic turning type composting and biogasification facilities at this moment. Sufficient objective data about their merits, costs, and labor related to installation are important to promote their installation.
  • 谷川昇, 古市徹, 石井一英, 西上耕平
    においかおり環境学会誌 38 (1) 13 - 17 2007 [Refereed][Not invited]
  • TANIKAWA Noboru, FURUICHI Toru, ISHII Kazuei, MATSUO Koji, ISEKI Takaya
    Journal of the Japan Society of Material Cycles and Waste Management Japan Society of Material Cycles and Waste Management 17 (5) 305 - 312 1883-1648 2006 [Refereed][Not invited]
    We have proposed a convenient monitoring method for CH4 concentration in ambient air at landfill sites and investigated its reliability and utility. A portable open-path analyzer (POMA), which is sold as a city gas leak tester, was used together with a retroreflector.
    A strong correlation was found between the CH4 concentrations measured using the POMA and those indicated using a flame ionization detector hydrocarbon analyzer (FID) . The values of CH4 obtained from the POMA are not dependent on the distance between the instrument and the retroreflector and show good repetition of results. The reliability of the proposed monitoring method is similar to that provided by the FID. The proposed method is a convenient and practical means of monitoring the change of average CH4 concentration in ambient landfill site air. Using it, we determined the influence of landfill gas on working conditions, in addition to the degree of landfill stabilization.
  • PROMENTILLA Michael Angelo B., FURUICHI Tohru, ISHII Kazuei, TANIKAWA Noboru
    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) Japan Society of Civil Engineers 62 (3) 308 - 324 1880-6082 2006 [Refereed][Not invited]
    This paper proposes a prioritization method using hierarchical network model to capture the complexity in the multi-criteria evaluation of remedial countermeasures. Such complexity arises from the complex interdependencies in the decision structure, as well as, from the inherent subjectivity of the decision maker. The proposed method which was built from the Analytic Network Process (ANP) uses the eigenvector approach to derive the local relative priorities and the overall relative priorities from the pairwise comparison matrix and supermatrix, respectively. The processes involved are illustrated using a decision problem drawn from real-life case study of a contaminated site caused by uncontrolled landfill in Japan.
  • 谷川昇, 古市徹, 石井一英, 西上耕平
    においかおり環境学会誌 37 (1) 1 - 8 2006 [Refereed][Not invited]
  • M. A. B. Promentilla, T. Furuichi, K. Ishii, N. Tanikawa
    WASTE MANAGEMENT 26 (12) 1410 - 1421 0956-053X 2006 [Refereed][Not invited]
    The aim of this paper is to present an evaluation method to aid decision makers in the prioritization and selection of appropriate countermeasures at the planning stage of site remediation. We introduced a hierarchical network (hiernet) decision structure and applied the Analytic Network Process (ANP) supermatrix approach to measure the relative desirability of the remedial alternatives using the decision maker's value judgment as input. A simplified illustrative example is presented to elucidate the process, as it is being applied to evaluate the feasible remedial countermeasures of a contaminated site caused by uncontrolled landfill. Four decision models derived from the generalized hiernet were examined to describe the effect of hierarchic functional dependence, inner dependence and feedback cycle on the derivation of the priority weights. The ANP could provide a more flexible analytical framework to break down one's judgment through a more elaborate structure in a systematic way to understand the complexity of the decision problem. The proposed method therefore may not only aid in selecting the best alternative but also may help to facilitate communication to understand why an alternative is preferred over the other alternatives through the analysis of the derived weights and its underlying decision structure. (c) 2005 Elsevier Ltd. All rights reserved.
  • Kotani Katsumi, Furuichi Toru, Ishii Kazuei
    Journal of the Japan Society of Material Cycles and Waste Management Japan Society of Material Cycles and Waste Management 16 (6) 453 - 466 1883-1648 2005 [Refereed][Not invited]
    To construct landfill sites acceptable to regional residents, safe and reliable engineering structures are required. However, due to the fact that landfill sites require mixed techniques in the variable fields of civil engineering, the technical level of design and construction for landfill sites are not as yet mature, leading to technical troubles for many landfill sites.
    It is necessary to investigate the content of these troubles and to development countermeasures for preventing them in the future. This study analyzes real causes and effective countermeasures for problems in forty-eight cases of existent landfill sites, which authors have been involved in. Seven alternatives for trouble prevention are proposed, and evaluated by a questionnaire survey for specialists in design and construction of landfill sites. Results of this analysis reveal that many troubles arise in the process of construction and/or operation, but the causes of these points actually lie in the design stage. To prevent technical troubles, it is important that there are not only landfill site designs which are suitable to the geographical and geological features at properly selected sites but also thorough construction management and flexible countermeasures for unexpected accidents.
  • 古市徹, 石井一英, 南部稔
    土木学会論文集 (797/VII-36) 37 - 50 2005 [Refereed][Not invited]
  • 古市 徹, 石井 一英
    地下水学会誌 公益社団法人 日本地下水学会 46 (1) 61 - 74 0913-4182 2004/02/17
  • 石井一英, 古市 徹
    土木学会論文集 (762/VII-31) 33 - 47 2004 [Refereed][Not invited]
  • Kunichika Nakamiya, Toru Furuichi, Kazuei Ishii, Ikuo Souta
    Journal of Material Cycles and Waste Management 6 (1) 35 - 40 2004 [Refereed][Not invited]
  • ISHII Kazuei, FURUICHI Tohru
    Journal of groundwater hydrology 日本地下水学会 46 (1) 3 - 22 0913-4182 2004 [Refereed][Not invited]
  • K. Nakamiya, T. Furuichi, K. Ishii
    Journal of Material Cycles and Waste Management 5 (1) 63 - 68 2003 [Refereed][Not invited]
  • 中宮邦近, 古市 徹, 石井一英
    都市清掃 全国都市清掃会議 55 (247) 316 - 320 0285-4104 2002 [Refereed][Not invited]
  • 石井一英, 古市 徹, 今井紀和, 和田卓也
    廃棄物学会論文誌 13 (5) 279 - 288 2002 [Refereed][Not invited]
  • Isolation of a Fungus from Den-itrifying Activated Sludge That Degrades Highly Chlorinated Dioxins
    K. Nakamiya, T. Furuichi, K. Ishii
    Journal of Material Cycles and Waste Management 4 (2) 127 - 134 2002 [Refereed][Not invited]
  • KOTANI Katsumi, FURUICHI Tohru, ISHII Kazuei
    Journal of the Japan Society of Material Cycles and Waste Management Japan Society of Material Cycles and Waste Management 12 (4) 153 - 162 1883-1648 2001 [Refereed][Not invited]
    To obtain public acceptance for construction of landfill sites, it is important to consider not only the theoretical presentation of non-hazardousness of landfill sites, but also public confidence and public involvement at any planning stages of the landfill site construction. People living around a proposed landfill site tend to demand a non health-hazardous landfill site, which means improvement of the functions of the landfill site, on a negotiation table. On the other hand, an administration finds difficulty in constructing the improved landfill site because of budgetary restriction on public works. Therefore, those contradictory relations cause many difficulties in the negotiation.
    The objective of this paper is firstly to examine the above mentioned contradictory relations between improving functions and construction cost of landfill sites, and secondarily to demonstrate the possibility of improved and less expensive landfill sites. Namely, thirty-two typical existing landfill sites were analyzed with regard to construction cost and functions related with improved landfill sites. Based on this case study, three ideally-improved landfill site models were proposed and their costs were estimated. It is concluded that each of the three models is sufficiently equipped with non health-hazardous functions and that the construction cost is reasonable.
  • ISHII Kazuei, FURUICHI Tohru, TANAKA Nobutoshi
    Journal of groundwater hydrology 日本地下水学会 43 (3) 171 - 188 0913-4182 2001 [Refereed][Not invited]
  • 一般廃棄物焼却飛灰中のダイオキシン類処理の現状分析と方策に関する検討
    古市徹, 石井一英, 平岡正勝
    都市清掃 54 (24) 257 - 266 2001 [Refereed][Not invited]
  • FUKUMOTO Tsugiya, FURUICHI Tohru, ISHII Kazuei, EBINA Yumiko, HANASHIMA Masataka
    Journal of the Japan Society of Material Cycles and Waste Management Japan Society of Material Cycles and Waste Management 11 (2) 101 - 110 1883-1648 2000/03 [Refereed][Not invited]
    Nowadays, construction of landfill sites has become more difficult because of the opposition from residents. The reasons are : anxiety about groundwater pollution ; doubts about the results of site selection ; suspicion of the operating bodies, and so on. To settle this problem, the '1997 Amendment to the Waste Management & Public Cleansing Law' obliged all solid waste disposal facilities to carry out living environment assessment and to make the results of the assessment available to the public. But living environment assessment only can not settle this problem completely. Residents' participation in planning and site selection for landfill sites is also required. The objective of this study is: to integrate the process of site selection for landfill sites, through three real examples of site selection, by developing a procedure of site selection based on geological and hydrogeological conditions, and introducing public participation into the procedure. Effectiveness of this process is also examined through three other real examples of site selection, where opposition from residents has occurred. As a result, it is supposed that : carrying out site selection ; making proper information available to the public ; and holding public hearings ; may prevent the escalation of opposition from residents caused by poor information, and promote mutual understanding.
  • A Study of Remedial Alternatives for Soil and Groundwater-Contamination by Numerical Simulation; The First Analysis of the Inappropriate Storage Site
    Kazuei Ishii, T. Furuichi, T. Imai, Kuniyuki Ishii
    Journal of Korea Solid Wastes Engineering Society 5 (1) 25 - 30 2000 [Refereed][Not invited]
  • FURUICHI Tohru, ISHII Kazuei, TERAO Yasushi, MORISHITA Kanetoshi
    Journal of the Japan Society of Material Cycles and Waste Management Japan Society of Material Cycles and Waste Management 11 (1) 38 - 47 1883-1648 2000/01 [Refereed][Not invited]
    A recent serious environmental issue has been soil and groundwater contamination caused by waste materials. However in actuality, many local governments in Japan are experiencing trouble with development of plans to restore contaminated sites, because they have no methodology. Therefore, establishment of a methodology and procedure for investigation and remediation of contaminated sites is required. In this paper, 1) we proposed a flowchart of countermeasures for soil and groundwater contamination caused by waste materials in Japan ; 2) we introduced scoping into the countermeasures and showed the importance of developing a plan of basic remedial strategies ; and 3) we developed a diagnostic system that supported the development of an investigation plan, futhermore, by applying the diagnostic system to an actual inappropriate storage site, we proposed some remedial alternatives for contaminated sites, and we showed that the data management system with the Geographic Information System (GIS), which was part of the diagnostic system, was a very effective tool in planning the basic remedial strategies.
  • ISHII Kazuei, FURUICHI Tohru, TANAKA Nobutoshi
    Journal of Groundwater Hydrology 公益社団法人 日本地下水学会 40 (2) 105 - 120 0913-4182 1998/05 [Refereed][Not invited]
    Soil and groundwater pollutions are caused by infiltration of hazardous organic liquids into soil due to illegal dumpings and inappropriate storages. The object of this study is investigating the behavior of non-aqueous phase liquid (NAPL) in soil and ground water.
    First, one dimensional column experiments are carried out for various NAPL with glassbeads layer as porous media. The experiment includes measuring infiltration rate and vertical distribution of NAPL and water after NAPL movement stops.
    Second, capillary pressure-saturation (P-S) relations needed in the mathematical model is measured and compared with that calculated by the method of Lenhard & Parker (1988). As a result, for various NAPL, P-S relations in air-NAPL systems can be caluculated by P-S relations in air-water systems but P-S relations in air-NAPL-water systems can not be calculated in a small saturation area because of trapped NAPL. Then, an amount of residual NAPL in suspended water zone is measured and relations between residual NAPL saturation and properties of NAPL and porous media is investigated.
  • TANAKA Nobutoshi, ISHII Kazuei
    Material Cycles and Waste Management Research Japan Society of Material Cycles and Waste Management 6 (1) 24 - 33 0917-0855 1995/01/30 
    In the potential case, where solid waste containing a small amount of volatile organic compounds (VOC) and/or high density VOC liquid might be disposed of in sanitary landfill sites, the VOC transportation and attenuation process is described. The VOC transport process by unsaturated water flow caused by precipitation and landfill gas flow by anaerobic gas production is especially described in detail. After the description of distribution coefficient and absorption rate between refuse and liquid, and Henry's law constant between liquid and gas, a developed mathematical model of VOC transport by unsaturated water flow and landfill gas flow is presented.
    As a result, most VOC's, newly specified as hazardous coumpounds by the wastes disposal standards of the Waste Management Law amended in 1994 will be transported upward by landfill gas flow and then may become detectable in landfill gas.
  • 石井一英, 田中信壽, 松藤敏彦, 東條安匡
    環境工学研究論文集 32 387 - 396 1995 [Refereed][Not invited]

Books etc

  • エネルギーとバイオマス~地域システムのパイオニア~
    古市徹, 石井一英著 
    環境新聞社 2018/11
  • エコセーフなバイオエネルギー-産官学連携事業の実際-
    古市 徹, 石井一英 (Editor)
    環境新聞社 2015
  • 環境汚染現場の修復〜実務者のための新アプローチ〜
    古市徹編著 (Contributor)
    オーム社 2013/02
  • クローズドシステム処分場技術ハンドブック
    花嶋正孝, 古市徹監修 (Contributor)
    オーム社 2012/12
  • バイオマス地域循環−再生可能エネルギーのあるべき姿−
    古市徹, 西則雄編著 (Contributorpp.42-51)
    環境新聞社 2012/10
  • 循環型社会の廃棄物系バイオマス−利活用事業成功のためのシステム化−
    古市徹監修 (Contributor)
    環境新聞社 2010/09
  • 日本の最終処分場(英文対訳付き)
    花嶋正孝, 古市徹監修 (Contributor)
    環境産業新聞社 2009/12
  • 不法投棄のない循環型社会づくり−不法投棄対策のアーカイブス化−
    古市徹, 西則雄編著 (Contributor)
    環境新聞社 2009/10
  • 健康と環境の工学
    北海道大学工学部環境衛生工学コース編 (Contributor)
    技報堂出版 2008
  • 地盤環境工学ハンドブック
    嘉門雅史, 日下部治, 西垣誠編集 (Contributor)
    朝倉書店 2007
  • バイオリサイクル−循環型共生社会への挑戦−
    古市徹, 西則雄編著 (Contributor)
    環境新聞社 2006
  • 地下水・土壌汚染の基礎から応用−汚染物質の動態と調査・対策技術−
    日本地下水学会編 (Contributor)
    理工図書 2006
  • 絵で見るクローズドシステム処分場
    花嶋正孝, 古市徹監修 (Contributor)
    環境新聞社 2006
  • 土壌・地下水汚染−循環共生をめざした修復と再生−
    古市徹監修 (Contributor)
    オーム社 2006
  • みんなのクローズドシステム処分場
    花嶋正孝, 古市徹監修, クローズドシステム処分場開発研究会編 (Contributor)
    オーム社 2004
  • はじめてのクローズドシステム処分場−被覆型最終処分場の計画と事例
    古市徹, 花嶋正孝監修, クローズドシステム処分場開発研究会編 (Contributor)
    オーム社 2002
  • 有害廃棄物による土壌・地下水汚染の診断
    古市徹監修 (Contributor)
    環境産業新聞社 2000


Awards & Honors

  • 2012/10 The 7th Asian Pacific Landfill Symposium Winner of Best Paper
     A New Concept of Final Disposal Systems for MSW Management Considering Storage of Recyclable Materials and Disaster Waste 
    受賞者: ISHII Kazuei
  • 2008 平成19年度廃棄物学会奨励賞
  • 2007 第18回廃棄物学会研究発表会優秀ポスター賞
  • 2003/05 廃棄物学会 廃棄物学会論文賞
     廃棄物起因の土壌・地下水汚染現場への数値 シミュレーションと比抵抗法の適用 
    受賞者: 石井 一英

Research Grants & Projects

  • 廃棄物最終処分場の長寿命化に伴う機能検査と気候変動適応策
    Date (from‐to) : 2019/04 -2022/03
  • 1, 4-ジオキサン地下水汚染修復の予測・評価のための統合的数値判定手法の開発
    Date (from‐to) : 2015/04 -2018/03 
    Author : 石井 一英
  • メタン取扱施設における安全管理のための簡便メタンモニタリング手法の開発
    文部科学省:文部科学研究費補助金, 基盤研究(B)(一般)
    Date (from‐to) : 2009/04 -2012/03 
    Author : 石井 一英
  • 生活環境アセスメントを支援する土壌・地下水汚染予測評価手法の開発
    文部科学省:文部科学研究費補助金, 奨励研究(A)
    Date (from‐to) : 1999/04 -2001/03 
    Author : 石井 一英

Educational Activities

Teaching Experience

  • Recycling Systems of Environmental Resources
    開講年度 : 2021
    課程区分 : 修士課程
    開講学部 : 工学院
    キーワード : リサイクルシステム、廃棄物、環境保全、資源保全、バイオマス、制度設計
  • Recycling Systems of Environmental Resources
    開講年度 : 2021
    課程区分 : 修士課程
    開講学部 : 工学院
  • Solid Waste Management Systems Planning
    開講年度 : 2021
    課程区分 : 修士課程
    開講学部 : 工学院
    キーワード : 循環型社会、システムズアプローチ、共生化、住民参加、リスクコミュニケーション、不法投棄
  • Inter-Graduate School Classes(General Subject):Natural and Applied Sciences
    開講年度 : 2021
    課程区分 : 修士課程
    開講学部 : 大学院共通科目
  • Recycling Systems of Environmental Resources
    開講年度 : 2021
    課程区分 : 博士後期課程
    開講学部 : 工学院
    キーワード : リサイクルシステム、廃棄物、環境保全、資源保全、バイオマス、制度設計
  • Recycling Systems of Environmental Resources
    開講年度 : 2021
    課程区分 : 博士後期課程
    開講学部 : 工学院
  • Solid Waste Management Systems Planning
    開講年度 : 2021
    課程区分 : 博士後期課程
    開講学部 : 工学院
    キーワード : 循環型社会、システムズアプローチ、共生化、住民参加、リスクコミュニケーション、不法投棄
  • Solid Waste Management Engineering
    開講年度 : 2021
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 循環型共生社会、廃棄物管理計画、システムズアプローチ、廃棄物の質と量の流れ、リスク管理、住民合意
  • Environmental Systems Modeling
    開講年度 : 2021
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 環境問題、社会・技術システム、環境モデリング、地下水モデリング、社会・経済モデリング
  • Mathematical Method for Planning
    開講年度 : 2021
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 計画、システムズアプローチ、意思決定、統計手法
  • Environment and People
    開講年度 : 2021
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : 食のバリューチェーン、Society 5.0、エネルギー、異分野融合、持続可能性、フィールド、ロバストネス(強靱性)
  • Exercise in Numerical Analysis
    開講年度 : 2021
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : データ解析 構造解析 数値計算 モデリング
  • Environmental Engineering Laboratory II
    開講年度 : 2021
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : レポートの書き方 安全教育 流体物性 重金属 物理化学処理 下水処理 埋立地の温暖化ガス 透気係数
  • Introduction to Environmental Engineering
    開講年度 : 2021
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 環境問題の歴史,気候変動,SDGs,上下?道,?環境保全,室内環境,廃棄物処分,循環計画システム
  • Solid Waste Technology Policy
    開講年度 : 2021
    課程区分 : 専門職大学院
    開講学部 : 公共政策学教育部
    キーワード : 循環型社会、システムズアプローチ、共生化、住民参加、リスクコミュニケーション、不法投棄

Committee Membership

  • 2020/05 - Today   Japan Society of Material Cycle and Waste Management   Director

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