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Last Updated :2024/07/25

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Master

Affiliation (Master)

  • Research Faculty of Agriculture　Fundamental AgriScience Research　Bioresource and Environmental Engineering

Affiliation (Master)

  • Research Faculty of Agriculture　Fundamental AgriScience Research　Bioresource and Environmental Engineering

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Profile and Settings

Degree

  • Doctor(Agriculture)（Hokkaido University）

Profile and Settings

  • Name (Japanese)

    Iwabuchi

  • Name (Kana)

    Kazunori

  • Name

    200901064810291024

Alternate Names

Achievement

Research Interests

  • SDGs (1, 2, 6, 7, 9, 13, 15)   Sustainable society   Torrefaction   Bio char   Solid biomass fuel   PM2.5 reduction   Crop production using biochar   Composting   

Research Areas

  • Environmental science/Agricultural science / Agricultural environmental and information engineering / Bioresource Engineering

Research Experience

  • 2020/10 - Today 北海道大学 総長補佐（国際連携機構）
  • 2020/09 - Today NPO法人 浄化槽ナビゲーター認証機構 理事長
  • 2012/04 - Today 北海道大学 大学院 教授（農学研究院）
  • 2010/04 - 2012/03 Utsunomiya University Faculty of Agriculture
  • 2006/11 - 2012/03 Utsunomiya University
  • 2008/04 - 2010/03 Tokyo University of Agriculture and Technology United Graduate School of Agricultural Science
  • 2000/08 - 2006/10 Utsunomiya University Faculty of Agriculture Associate Professor
  • 2002/04 - 2004/03 Utsunomiya University Faculty of Agriculture
  • 1993 - 2000/07 Yamagata University Faculty of Agriculture Associate Professor
  • 1996 - 1997 Visiting Professor, School of Engineering, University of Guelph (CANADA)
  • 1987 - 1993 Yamagata University Faculty of Agriculture Assistant Professor

Awards

  • 2022/09 （一社）農業食料工学会 学術賞
     「資源循環と低環境負荷を基軸とした廃棄物系バイオマスの炭化による再資源化」 
    受賞者: 岩渕和則
  • 2022/05 日本農業工学会フェロー
  • 2010/02 平成21年度宇都宮大学 ベストレクチャー賞
     
    受賞者: 岩渕 和則
  • 2008/12 平成20年度宇都宮大学 優秀講義賞
     
    受賞者: 岩渕 和則
  • 2006 神戸大学農学部食料環境システム学科 生産環境工学コースBest Teacher Award
     
    受賞者: 岩渕 和則
  • 1997 農業機械学会東北支部奨励賞

Published Papers

  • Low-temperature biochars are more effective in reducing ammonia emissions through various mechanisms during manure composting
    Yunsik Shin, Kazunori Iwabuchi, Takanori Itoh
    Journal of Material Cycles and Waste Management accepted  2023/08 [Refereed][Not invited]
  • Mahmudul Islam Piash, Koki Uemura, Takanori Itoh, Kazunori Iwabuchi
    Journal of Environmental Management Elsevier 336 117612 - 117612 0301-4797 2023/03/07 [Refereed]
  • Takanori Itoh, Teppei Ogawa, Kazunori Iwabuchi, Katsumori Taniguro
    Waste Management 162 1 - 7 0956-053X 2023/03 [Refereed]
  • Davaajav Dalkhsuren, Kazunori Iwabuchi, Takanori Itoh, Takumi Narita, Mahmudul Islam Piash, Baatarbileg Nachin, Gerelbaatar Sukhbaatar
    BioEnergy Research 1939-1234 2022/10/22 [Refereed]
  • Improvement of the fuel properties of dairy manure by increasing the biomass-to-water ratio in hydrothermal carbonization
    Aliyu, M, Iwabuchi, K, Itoh, T
    PLoS ONE 2022/06/18 [Refereed]
  • Mahmudul Islam Piash, Kazunori Iwabuchi, Takanori Itoh
    Science of The Total Environment 822 153509 - 153509 0048-9697 2022/01 [Refereed]
  • Yoichiro Kojima, Ryoh Nakakubo, Kazunori Iwabuchi
    Journal of Material Cycles and Waste Management 1438-4957 2021/11/12 [Refereed]
  • Mohammed Aliyu, Kazunori Iwabuchi, Takanori Itoh
    Biomass Conversion and Biorefinery 2190-6815 2021/10/28 [Refereed]
     
    AbstractThis study investigated co-hydrothermal carbonisation (co-HTC) of dairy manure (DM) and wood shavings from Larix kaempferi, commonly known as the Japanese larch (JL) to enhance the fuel properties of the resulting hydrochar. The JL was mixed with the DM at 25, 50 and 75 wt.% ratios. Co-HTC was conducted at 260 °C for 20 min. The resulting hydrochars were characterised based on the physicochemical properties and the thermal behaviour. Results showed that the hydrochar solid biofuel properties improved as the ratio of JL was increased. The produced hydrochars were in the region of lignite and closed to the region of the coal with increased fixed carbon, carbon contents and lowered H/C and O/C ratios. Hydrochar with ash content of 7.2 ± 0.5% was obtained at 75 wt.% JL. In addition, the HHV of hydrochar increased remarkably to 26.4 ± 0.02 MJ/kg as the mass ratio of the JL was increased. The surface morphology of the hydrochars were altered and became distinct while the specific surface area (SSA) and the total pore volume (TPV) of the hydrochars increased at increasing the mass ratio of the JL. The surface functional groups were also altered by the co-HTC process. A decline in the combustion performance was observed after the HTC process but improved at 75 wt.% JL after the co-HTC process. The kinetic analysis also revealed that the activation energy decreased after the HTC process but increased to a higher value at 50 wt.% JL after the co-HTC process. Therefore, hydrochar production by co-HTC of DM and JL has proved to be an effective and promising solid biofuel source. Graphical abstract
  • Improvement in the operational stability of biogas plants utilizing dairy cow manure and the development of a simple operational status monitoring method
    Ishikawa, S, Iwabuchi, K, Takahashi, K, Suzuki, T, Hara, R, Kita, H, Hoshiba, S
    The Journal of the Society of Agricultural Structures, Japan 52 (3) 10 - 21 2021/09 [Refereed]
  • Mahmudul Islam Piash, Kazunori Iwabuchi, Takanori Itoh, Koki Uemura
    Geoderma 397 115100 - 115100 0016-7061 2021/09 [Refereed]
  • Rika Kitamura, Toshinori Kozaki, Kazuo Ishii, Masayuki Iigo, Takeshi Kurokura, Kenji Yamane, Isamu Maeda, Kazunori Iwabuchi, Takahiro Saito
    Microbes and Environments 36 (2)  - n/a 1342-6311 2021/04/27 [Refereed]
  • Shoki Ochiai, Kazunori Iwabuchi, Takanori Itoh, Toshihiro Watanabe, Mitsuru Osaki, Katsumori Taniguro
    Journal of Soil Science and Plant Nutrition 21 276 - 285 0718-9508 2021 [Refereed][Not invited]
  • Takanori Itoh, Kazunori Iwabuchi, Naohiro Maemoku, Siyao Chen, Katsumori Taniguro
    PLOS ONE 15 (5) e0233027 - e0233027 2020/05/29 [Refereed][Not invited]
  • Takanori Itoh, Nana Fujiwara, Kazunori Iwabuchi, Takumi Narita, Dolgormaa Mendbayar, Mitsushi Kamide, Shinobu Niwa, Yutaka Matsumi
    Fuel Processing Technology 2020/03 [Refereed][Not invited]
  • Shiho Ishikawa, Kazunori Iwabuchi, Keiji Takahashi, Ryoichi Hara, Hiroyuki Kita
    Engineering in Agriculture, Environment and Food 12 (2) 155 - 161 2019/04 [Refereed][Not invited]
     
    © 2018 Asian Agricultural and Biological Engineering Association In this study, we report the long term operation results of analyses of characteristics of the Rakuno Gakuen University Biogas generation plant (BGP), which has been in operation since March 2000. We evaluated using data for the 11-year period between April 2000 (FY2000), when BGP was built, and March 2011 (FY2010). The average biogas production per unit showed substantial fluctuations during this period, increasing from 20 m 3 during the trial operation period in FY2000 to 30–40 m 3 in FY2001–FY2006, and then decreasing to 15–25 m 3 in FY2007–FY2010. The optimal methane fermentation facility temperature for steady methane gas production was approximately 40 °C. In FY2007, this BGP experienced its first localized functionality decline in energy use, including methane fermentation and power generation facilities. This resulted from changes in the substrate characteristics, inputs, and methane fermentation facility temperature, indicating that operations need to accommodate such changes in the long term.
  • Takanori Itoh, Kazunori Iwabuchi, Naohiro Maemoku, Izumi Sasaki, Katsumori Taniguro
    Waste Management 85 66 - 72 0956-053X 2019/02 [Refereed][Not invited]
  • Koki Maeda, Fumihito Miyatake, Ryoki Asano, Kei-ichi Nakajima, Takeki Maeda, Kazunori Iwabuchi
    Chemosphere 206 310 - 319 1879-1298 2018/09/01 [Refereed][Not invited]
     
    Animal manure is a source of the greenhouse gas nitrous oxide (N2O), therefore understanding the mechanisms underlying its production is essential for developing mitigating strategies and sustainable livestock production system. In this study, microbial communities potentially involved in multiple emission peaks during initial stage of laboratory-scale dairy manure composting with forced aeration system were investigated. Mature compost was used for the bulking agent. Change of overall bacterial community and nitrification-denitrification gene abundance were monitored by using 16S rRNA gene amoA, nirS, nirK or nosZ genes, respectively. Three N2O emission peaks were observed when the temperature reached at 45, 60 and 72 °C, at the same timing of oxygen consumption peaks. The maximum N2O emission peak was 3.86 mg h−1 kg−1 TS when the temperature reached at 60 °C. The shift of bacterial community among these experimental periods was significant, orders Flavobacteriales, Burkholderiales and Xanthomonadales increased, while orders belong to Bacillales, Lactobacillales, Clostridiales and Bacteroidales decreased. In addition, abundance of two denitrification genes (nirS and nosZ) significantly increased during this period. Clone library analysis of these genes showed that significantly increased sequences belonged to Pseudomonas-like clusters for both genes, indicates that denitrifiers possesses these genes are involved for these N2O emission peaks caused by mature compost addition.
  • Takanori Itoh, Kazunori Iwabuchi, Kumpei Ota
    PLOS ONE 13 (4) e0196249 - e0196249 1932-6203 2018/04/23 [Refereed][Not invited]
  • Naoto Shimizu, Joko Nugroho Wahyu Karyadi, Michio Harano, Kazunori Iwabuchi, Toshinori Kimura
    Engineering in Agriculture, Environment and Food 11 (2) 65 - 73 1881-8366 2018/04/01 [Refereed][Not invited]
     
    The aim of this study was to determine the appropriate strategy for cattle manure composting with forced aeration. The composting of cattle manure was conducted using an 18.8 L reactor with three different amounts of total air supplied (1080, 3240 and 10,800 L/kg dry mass) during 360 h of composting using continuous and on/off sequencing (20 min/h) aeration methods and three turning patterns (no turning, full turning and turning with position change). The degradation of organic matter in three-stage systems (the compost was turned every 120 h over the 360 h period) was significantly affected by total air supply volume and was large in the case of on/off sequence aeration. The pattern of moisture change was more affected by turning than by aeration modes. The optimal composting conditions for organic matter degradation (maximum of 37.7%) were aeration rate: 0.45 L/min kg dm, aeration mode: on/off sequencing process and full turning. The total accumulated weight losses and heat generated during composting indicated significant effects of the total air supplied and were large in the case of the continuous process.
  • Torrefaction of high moisture content biomass in an industrial rotary kiln combustion type reactor
    Bakri, S. N. S, Iwabuchi, K, Yoshimoto, R, Taniguro, K
    J. of JSAM 80 (2) 123 - 132 2018/03 [Refereed][Not invited]
  • Shiho Ishikawa, Kazunori Iwabuchi, Michio Komiya, Ryoichi Hara, Jun Takano
    Engineering in Agriculture, Environment and Food 9 (2) 165 - 170 1881-8366 2016/04/01 [Refereed][Not invited]
     
    In order to consider the potential for electricity supply from a biogas power generation system (BGP) located adjacent to a livestock barn, the power balance was determined by using both simulation and actual measurement. Examination of power balances at the barn and the BGP showed that a certain amount of electricity for supply could be secured based on load leveling in both tie-stall barns and free-stall barns. BGPs are a viable renewable energy (RE) power source that can produce enough electricity for system operation and maintenance as well as a significant surplus of supply for power companies and other users. BGPs have the potential to allow output control appropriate for the relevant amount of gas storage. Further, output control based on the use of a gas holder in combination with changes in the number of biogas generators could allow more efficient usage of biogas. Specifically, the range of power output adjustment can be widened through parallel operation of several biogas generators, instead of a single generator. In other words, one biogas generator uses a constant power supply, and the other uses it to control the output for the related amount of gas storage. In this way, the possibility of achieving a constant electricity output through biogas power generation system and a regulated power supply was demonstrated.
  • Shiho Ishikawa, Kazunori Iwabuchi, Jun Takano
    Engineering in Agriculture, Environment and Food 9 (1) 56 - 63 1881-8366 2016/01/01 [Refereed][Not invited]
     
    In this study, power demand leveling technologies were evaluated through the adjustment of electrical equipment operating times based on the results of a measurement survey on livestock feeding management system electricity usage. The results showed peak power demand at two specific times. One was during milking time, when a pipeline milker, a bulk cooler and other milking equipment were used. In the other case, power demand peaked early in the morning and at night, when electric water heaters were in operation, due to the large number of milking cows and the time-consuming milking method used. In either case, it was found that ventilation fans and other incidental facilities used over extended periods were major consumers and accounted for the base of power demand, and that power consumption would definitely be reduced by peak power demand leveling through adjustment of operational methods for this equipment. It was found that operational control involving the introduction of inverters and the operation of ventilation fans only in parlors and holding areas during milking reduced daily power consumption by utmost 40% on farms with milking parlors and by approximately 30% on farms without. The use of an ice builder to pre-cool raw milk on large-scale farms could reduce daily power consumption by approximately 13%. When combined with the reduced power consumption from operational control of ventilation fans, power consumption could be reduced by over 50%.
  • Rika Kitamura, Kazuo Ishii, Isamu Maeda, Toshinori Kozaki, Kazunori Iwabuchi, Takahiro Saito
    JOURNAL OF BIOSCIENCE AND BIOENGINEERING 121 (1) 57 - 65 1389-1723 2016/01 [Refereed][Not invited]
     
    Biofiltration technology based on microbial degradation and assimilation is used for the removal of malodorous compounds, such as ammonia. Microbes that degrade malodorous and/or organic substances are involved in composting and are retained after composting; therefore, mature composts can serve as an ideal candidate for a biofilter medium. In this study, we focused on different types of raw compost materials, as these are important factors determining the bacterial community profile and the chemical component of the compost. Therefore, bacterial community profiles, the abundance of the bacterial ammonia monooxygenase gene (amoA), and the quantities of chemical components were analyzed in composts produced from either food waste or cattle manure. The community profiles with the lowest beta diversity were obtained from single type of cattle manure compost. However, cattle manure composts showed greater alpha diversity, contained higher amounts of various rRNA gene fragments than those of food waste composts and contained the amoA gene by relative quantification, and Proteobacteria were abundantly found and nitrifying bacteria were detected in it. Nitrifying bacteria are responsible for ammonia oxidation and mainly belong to the Proteobacteria or Nitrospira phyla. The quantities of chemical components, such as salt, phosphorus, and nitrogen, differed between the cattle manure and food waste composts, indicating that the raw materials provided different fermentation environments that were crucial for the formation of different community profiles. The results also suggest that cattle manure might be a more suitable raw material for the production of composts to be used in the biofiltration of ammonia. (C) 2015, The Society for Biotechnology, Japan. All rights reserved.
  • エネルギーの安定的供給を目的としたバイオガス発電施設併設型畜舎における需要電力の平準化
    石川志保, 岩渕和則, 高野準, 松田從三
    農業施設 45 (2) 54 - 61 2014 [Refereed][Not invited]
  • 乳牛ふん尿の灌水同時施肥を可能とする固液分離機併用型好気性ふん尿発酵
    山下善道, 福原資雄, 岩田晃一郎, 佐藤達雄, 荒木肇, 近江谷和彦, 清水直人, 岩渕和則
    農業施設 45 (1) 8 - 13 2014 [Refereed][Not invited]
  • 塩化マグネシウムの添加が堆肥化早期のstruvite生成とアンモニア揮散とに及ぼす影響
    前田武己, 佐久間雅紀, 工藤洋晃, 立石貴浩, 築城幹典, 宮竹史仁, 岩渕和則, 前田高輝
    農業施設 44 (3) 100 - 106 2013 [Refereed][Not invited]
  • 中久保亮, 小島陽一郎, 岩渕和則, 門間崇広, 松田従三, 近江谷和彦
    農業機械学会誌 75 (1) 45 - 51 2013 [Refereed][Not invited]
  • 戻し堆肥の混合が堆肥化初期過程の一酸化二窒素（N2O）排出速度に及ぼす影響
    宮竹史仁, 鈴木康浩, 谷昌幸, 加藤拓, 前田高輝, 前田武己, 岩渕和則
    農業施設 43 (1,2) 41 - 48 2012 [Refereed][Not invited]
  • 和田芳彦, 野呂瀬幸政, 岩渕和則, 谷黒克守
    廃棄物資源循環学会論文誌 22 (3) 225 - 230 2011 [Refereed][Not invited]
  • 乳牛ふんの含水率が堆肥化初期過程の一酸化二窒素およびメタンの排出速度に及ぼす影響
    宮竹史仁, 久保田峻野, 谷昌幸, 加藤拓, 岩渕和則, 前田武己, 前田高輝
    農業施設 42 (1) 18 - 25 2011 [Refereed][Not invited]
  • 異なる副資材の混合が乳牛ふん堆肥化の温度，酸素消費速度，アンモニアガス濃度および堆肥成分に及ぼす影響
    宮竹史仁, 阿部佳之, 本田善文, 岩渕和則, 谷昌幸, 加藤拓
    農業施設 41 (3) 111 - 117 2010 [Refereed][Not invited]
  • Iwabuchi, K
    J. of JSAM 71 (1) 131 - 132 2009 [Refereed][Not invited]
  • 野呂瀬幸政, 岩渕和則, 池田喜雄, 倉島太一, 宮竹史仁
    農業施設 39 (4) 279 - 284 2009 [Refereed][Not invited]
  • 野呂瀬幸政, 岩渕和則, Saludes, R
    農業施設 39 (4) 285 - 294 2009 [Refereed][Not invited]
  • 宮竹史仁, 阿部佳之, 本田善, 岩渕和則
    農業施設 39 (4) 295 - 302 2009 [Refereed][Not invited]
  • 含水率管理による食品廃棄物の飼料化
    野呂瀬幸政, 岩渕和則, Saludes, R
    農業施設 40 (3) 167 - 176 2009 [Refereed][Not invited]
  • Ronaldo B. Saludes, Kazunori Iwabuchi, Fumihito Miyatake, Yoshiyuki Abe, Yoshifumi Honda
    BIORESOURCE TECHNOLOGY 99 (15) 7285 - 7290 0960-8524 2008/10 [Refereed][Not invited]
     
    The aim of this research was to evaluate the use of manufacturing wallboard paper scraps as an alternative bulking agent for dairy cattle manure composting. The characteristics of the composting process were studied based on the changes in physico-chemical parameters and compost quality. Composting of dairy cattle manure with wallboard paper was performed in a 481-L cylindrical reactor with vacuum-type aeration. Rapid degradation of organic matter was observed during the thermophilic stage of composting due to high microbial activity. High temperature and alkaline pH conditions promoted intense ammonia emission during the early stage of composting. The number of mesophilic and thermophilic microorganisms were found to be affected by changes in temperature at different composting stages. The total nitrogen (N), phosphorus (P), potassium (K), and sodium (Na) concentrations of the mixture did not change significantly after 28 days of composting. However, the presence of gypsum in the paper scraps increased the calcium content of the final compost. The wallboard paper had no phyto-inhibitory effects as shown by high germination index of final compost (GI = 99%). (C) 2008 Elsevier Ltd. All rights reserved.
  • 宮竹史仁, 岩渕和則, 阿部佳之, 本田善文
    農業機械学会誌 70 (2) 97 - 103 2008 [Refereed][Not invited]
  • 宮竹史仁, 阿部佳之, 本田善文, 岩渕和則
    農業施設 39 (1) 33 - 40 2008 [Refereed][Not invited]
  • R. B. Saludes, K. Iwabuchi, A. Kayanuma, T. Shiga
    BIOSYSTEMS ENGINEERING 98 (2) 198 - 205 1537-5110 2007/10 [Refereed][Not invited]
     
    A thermophilic-mesophilic sequence of composting was compared with continuous thermophilic composting in a small-scale laboratory reactor. Dairy cattle manure was allowed to self-heat adiabatically for one week prior to individual temperature treatments at 20, 37, and 55 degrees C. Preliminary self-heating was carried out to naturally activated indigenous compost microorganisms to attain thermophilic condition. Microbial activity during composting was monitored by measuring oxygen uptake rate (OUR). Total active microbial biomass was measured using the adenosine triphosphate (ATP) bioluminescence technique. Organic matter degradation was determined by measuring the volatile solids content of compost samples. Results showed that composting at 55 degrees C promotes the rapid degradation of organic matter as shown by high cumulative oxygen uptake. Composting at 37 degrees C also exhibited high microbial activity probably due to degradation of complex organic compounds. Microbial biomass was found to be high at 20 and 37 degrees C, indicating larger microbial communities at lower compost temperatures. Organic matter degradation analysis revealed no large differences in the final solid degradation rate at 55 and 37 degrees C. The study suggests the importance of a thermophilic-mesophilic sequence in composting to maximise the extent of organic matter degradation. (C) 2007 IAgrE. Published by Elsevier Ltd. All rights reserved.
  • Iwabuchi. K, L. Otten
    J. of JSAM 69 (1) 86 - 88 2007 [Refereed][Not invited]
  • 宮竹史仁, 岩渕和則, 阿部佳之, 本田善文
    農業機械学会誌 69 (2) 48 - 54 2007 [Refereed][Not invited]
  • F Miyatake, K Iwabuchi
    BIORESOURCE TECHNOLOGY 97 (7) 961 - 965 0960-8524 2006/05 [Refereed][Not invited]
     
    Investigations were carried out to find out the relationship between temperature and microbial activity in dairy cattle manure composting using oxygen uptake rate, specific growth rate and enzymatic activities during autothermal and isothermal composting experiments. In autothermal composting, oxygen uptake rate and specific growth rate were found to be most intensive in order of 43 degrees C, 60 degrees C and 54 degrees C. Isothermal composting at 54 degrees C resulted highest levels of enzymatic activity and promoted the volatile solids reduction. Based on the maximum enzymatic activity, specific growth rate appeared to be more closely linked with microbial activity in compost than with oxygen uptake rate. The enhancement of specific growth rate, enzymatic activity and volatile solids reduction were induced at 54 degrees C in cattle manure composting. (c) 2005 Elsevier Ltd. All rights reserved.
  • 池川直樹, 岩渕和則, 宮竹史仁, 関本均, 柏嵜勝
    農業機械学会誌 68 (5) 41 - 51 2006 [Refereed][Not invited]
  • F Miyatake, K Iwabuchi
    BIORESOURCE TECHNOLOGY 96 (16) 1821 - 1825 0960-8524 2005/11 [Refereed][Not invited]
     
    To clarify the characteristics of thermophilic bacteria in cattle manure compost, enzymatic activity and species diversity of cultivated bacteria were investigated at 54, 60, 63, 66 and 70 degrees C, which were dependent on composting temperature. The highest level of thermophilic bacterial activity was observed at 54 degrees C. Following an increase in temperature to 63 degrees C, a reduction in bacterial diversity was observed. At 66 degrees C, bacterial diversity increased again, and diverse bacteria including Thermus spp. and thermophilic Bacillus spp. appeared to adapt to the higher temperature. At 70 degrees C, bacterial activity measured as superoxide dismutase and catalase activity was significantly higher than at 66 degrees C. However, the decomposition rate of protein in the compost was lower than the rate at 66 degrees C due to the higher compost temperature. (c) 2005 Elsevier Ltd. All rights reserved.
  • 宮竹史仁, 岩渕和則, 木村俊範
    農業機械学会誌 65 (2) 101 - 105 2003 [Refereed][Not invited]
  • 宮竹史仁, 岩渕和則
    農業機械学会誌 65 (3) 146 - 148 2003 [Refereed][Not invited]
  • Iwabuchi, K, Miyatake, F
    J. of JSAM 63 (6) 85 - 89 2001 [Refereed][Not invited]
  • 中野 芳雄, 岩渕 和則
    農業機械学会誌 62 (5) 120 - 122 0285-2543 2000 [Refereed][Not invited]
  • K Iwabuchi, T Kimura, L Otten
    BIORESOURCE TECHNOLOGY 70 (3) 293 - 297 0960-8524 1999/12 [Refereed][Not invited]
     
    This paper describes the thermal properties (effective thermal conductivity and thermal diffusivity) of an organic waste used to model the composting process in relation to volumetric water content at 20 degrees C. The organic waste was a mixture of fresh dairy cattle feces and sawdust with a ratio of one-to-one on a dry weight basis. The thermal probe method was used to determine the effective thermal diffusivity. The effective thermal conductivities were found to increase with volumetric water content, and ranged from 0.0500 to 0.202 W m(-1) K-1 at volumetric water contents of 0% and 44.2%, respectively. The thermal diffusivity was not affected by the volumetric water content, and was found to have a mean value of 1.08 x 10(-7) m(2) s(-1). (C) 1999 Elsevier Science Ltd. All rights reserved.
  • 岩渕 和則, 木村 俊範
    農業機械学会誌 59 (5) 29 - 35 0285-2543 1997 [Refereed][Not invited]
  • Matsushima, U, Iwabuchi, K
    Environ. Control in Biol. 34 (4) 335 - 338 1996 [Refereed][Not invited]
  • 岩渕 和則, 木村 俊範, 上出 順一
    農業機械学会誌 56 (2) 135 - 138 0285-2543 1994 [Refereed][Not invited]
  • 岩渕 和則, 木村 俊範
    農業機械学会誌 56 (2) 67 - 74 0285-2543 1994 [Refereed][Not invited]
  • 廃棄物学会論文集 5 (1) 36 - 38 1994 [Refereed][Not invited]
  • K KANAHAMA, M SUDA, K IWABUCHI
    JOURNAL OF THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE 62 (2) 377 - 382 1882-3351 1993/09 [Refereed][Not invited]
     
    The angle of divergence between each pair of neighboring leaves on wild tomato plants, Lycopersicon pimpinellifolium (Jusl.) Mill., was measured with a semicircular protractor with an accuracy of +/- 2.5 degrees. Not only in individual plants but in different plants with 10 leaves, the angles between pairs of mature leaves that developed sequentially on the main shoot with left-handed phyllotaxis ranged widely, from a maximum of 154.7 degrees between the first leaf and the second leaf and a minimum of 119.3 degrees between the second and the third leaf. The angle between the each pair of neighboring leaves from the third and the tenth leaf was intermediate, ranging between 120.3 to 141.3 degrees. The mean angle of divergence on one plant was calculated to be 135.3 degrees. The same pattern was observed also in plants with right-handed phyllotaxis that developed 10 or 11 leaves on the main shoot. The angle of divergence between the terminal leaf and the first inflorescence was almost identical as that of pairs of leaves on the main shoot. The arrangement of nodes 7 to 12 of leaf primordia on the main shoot was similar. These results indicate that the phyllotaxis of tomato plants was 3/8, with an angle of divergence of 135 degrees, as calculated by the orthostichy system. Because the accuracy of measurement was within +/- 2.5 degrees, our results would also be compatible with phyllotaxis of 5/13 (about 138.4 degrees), 8/21 (about 137.1 degrees), 13/34 (about 137.6 degrees), or the limiting value of the main series in Schimper-Braun's law, (3-square-root 5)/2, (about 137.5 degrees).
  • 金浜 耕基, 須田 実, 岩渕 和則
    園芸学会雑誌 62 (2) 377 - 382 0013-7626 1993 [Refereed][Not invited]
  • 岩渕 和則, 上出 順一
    農業機械学会誌 55 (3) 73 - 79 0285-2543 1993 [Refereed][Not invited]
  • Iwabuchi,K, Matsuda,J
    J. of Agric. Struc., Japan 23 (3) 111 - 116 1993 [Refereed][Not invited]
  • 岩渕和則, 上出順一, 木村俊範
    農業機械学会誌 55 (5) 59 - 66 1993 [Refereed][Not invited]
  • 牛糞搾汁液によるメタンガス生成−回分操作による実験−
    岩渕和則, 松田従三
    農業施設 19 (1) 5 - 9 1988 [Refereed][Not invited]

Books etc

  • あぐり博士と考える北海道の食と農
    岩渕 和則 (Contributor)
    北海道新聞社 2014
  • 最新 畜産ハンドブック
    岩渕 和則 (Contributor)
    講談社サイエンティフィク 2014
  • バイオマス技術入門
    岩渕 和則 
    社）地域資源循環技術センター 2009
  • コンポスト化技術による資源循環の実現
    岩渕 和則 (Contributorコンポスト化および材料の熱的解析)
    シーエムシー 2009
  • バイオマス用語事典
    岩渕 和則 
    オーム社 2006
  • 栃木から世界をのぞく
    岩渕 和則 (Contributorふん尿の隠れた力)
    下野新聞社 2005
  • A Study of the Heat Production Rate during Composting of Dairy Cattle Feces
    Proceeding of International Symposium on Automation and Robotics in Bioproduction and Processing 1995
  • Relation between micro and macro phase phenomena during composting of biological wastes such as animal wastes and kitchen residues(共著)
    ASAE, Proceeding of Seventh International Symposium on Agricultural and Food Processing Waste 1995
  • Thermal Properties of Agricultural Organic Wastes
    ASAE, Proceeding of Seventh International Symposium on Agricultural and Food Processing Waste 1995

Presentations

  • 循環社会と糞尿利用  [Not invited]
    岩渕和則
    地球研・北大合同地球環境セミナー  2015/11  北海道大学農学部大講堂，札幌市  北海道大学工学研究院，総合地球環境学研究所
  • Reinvigoration of the regional agriculture and energy industries in the Philippines through effective utilization of unused resources  [Invited]
    IWABUCHI Kazunori
    International Conference on Harnessing Environment-Friendly Technologies on Waste Utilization  2013/12  Legazpi City, Republic of the Philippines  Bicol University
  • 堆肥化技術概論  [Invited]
    岩渕 和則
    バイオマスタウン形成促進のための地域における人材育成事業、バイオマス利活用中央研修会  2009/05  東京都港区  (社)地域資源循環技術センター

Teaching Experience

  • Regional Environmental Science VIRegional Environmental Science VI Kyoto University

Association Memberships

  • JAPAN ASSOCIATION OF INTERNATIONAL COMMITTEE OF AGRICULTURAL AND BIOSYSTEMS ENGINEERING   JAPAN SOCIETY OF THERMOPHYSICAL PROPERTIES   JAPANESE SOCIETY OF ANIMAL SCIENCE   米国農業生物工学会(ASABE)   JAPAN SOCIETY OF MATERIAL CYCLES AND WASTE MANAGEMENT   農業施設学会   THE JAPANESE SOCIETY OF AGRICULTURAL MACHINERY AND FOOD ENGINEERS   ASAE   Japanese society of Agri. Machinery   

Research Projects

  • 文部科学省：科学研究費補助金(基盤研究(B))
    Date (from‐to) : 2014 -2016 
    Author : 岩渕 和則
  • 文部科学省：科学研究費補助金(萌芽研究)
    Date (from‐to) : 2007 -2008 
    Author : 岩渕 和則
     
    有機廃棄物は高濃度の栄養源を蓄えているが、酸素については外部からの供気によって溶存化する必要がある。しかし高水分有機廃棄物の場合は,水分が多いため廃棄物内部までは酸素が供給されずに分解、減量化が阻害される。本研究で用いられる微細気泡は気泡直径杢約100μm以下に微細化させることによって、溶液中の酸素保持時間が数ヶ月もの長期になると言う報告があり、この特長によって汚泥分解に必要な酸素供給が効率的になり分解速度も飛躍的に高くなると考えている。本研究では以下の2点について検討した。まず高水分材料における微生物活性について検討を行った。高水分状態が酸素貯蔵庫となることの検証実験を、酸素供給が律速とならないように数グラムの高水分有機廃棄物を試料として分解発熱する好気性微生物の活性データを,マイクロヒートカロリーメータによる発熱量を計測し比増殖速度を求めた。この結果高水分状態は、低水分状態にくらべて明らかに微生物活性が高くなることが観測された。これは試料周囲からの酸素拡散による酸素供給が妨げられない限り、高水分状態は溶存酸素を豊富に貯留することが可能であることを示している。ただし37℃の環境下では対照区と比較して約2倍の微生物活性が表れたが、55℃では差が表れなかった。また微細気泡水と汚水と混合して有機物分解に与える影響を検討した結果、対照区である蒸留水混合区と比較して有機物分解に差は表れなかった。これは連続的に微細気泡が生ずるような反応方法を採用せず、バッチ式で微細気泡水を供給したためと考えられ、有機物分解に必要な酸素量に対し微細気泡の酸素量が小さかったためと考えられる。
  • Ministry of Education, Culture, Sports, Science and Technology：Grants-in-Aid for Scientific Research(基盤研究(B))
    Date (from‐to) : 2001 -2002 
    Author : Kazunori IWABUCHI
     
    This paper describes acceleration of degradation rate for high-moisture dairy manure with no bulking agent. High-moisture dairy manure has much dissolved oxygen, then first we have investigated dissolved oxygen content of dairy manure liquid.It was determined the relationship between dissolved oxygen and compost bacteria growth rate constant with nano-heat calorimeter. The Growth rate constant of compost bacteria increased with the increase of moisture content. And heat production rate of composting using high-moisture material was higher than that of composting using optimal-moisture material in the early stage reaction of composting. It means that the dissolved oxygen with high-moisture material induce the early stage, of composting reaction to accelerate degradation rate.This shows a possibility of innovative composting system for high-moisture biological wastes without any bulking agent.
  • 文部科学省：科学研究費補助金(奨励研究(A))
    Date (from‐to) : 1996 -1996 
    Author : 岩渕 和則
     
    基質濃度や、菌体濃度が測定可能な系や、比較的基質濃度の変化が測定されやすい活性汚泥プロセスなどの溶液反応においては微生物の動力学的検討が数多くなされ、測定データの蓄積がある。しかし、コンポスト化のような固体反応においてはその直接測定が困難であることが影響し、動力学的検討はされにくく、活性汚泥法による比増殖速度のデータをそのまま用いているものが多く、その値は0.013から0.17(1/h)である。筆者らが断熱条件下で詳細にコンポスト化反応速度を検討した結果、比増殖速度が従来の10倍以上に相当する1.7(1/h)にも達する能力を持ち合わせていた。この能力を引き出す最適環境として、試料含水率約55%w.b.があげられる。これは試料固体周囲に付着する水膜厚さによる酸素供給速度の支配と微生物活性に及ぼす水分ポテンシャルの両因子の結果である(農業機械学会誌投稿中)。水膜厚さは材料固有の表面積に、水ポテンシャルは水分特性に左右されるため、これのデータをいろいろな材料を対象として収集する必要がある。また水分状態を、より一般化するためには重量含水率による表示ではなく、水膜と水分ポテンシャルによる関数化が必要である。最適環境としての酸素濃度、菌種等は現在研究を継続中である。
  • 文部科学省：科学研究費補助金(奨励研究(A))
    Date (from‐to) : 1994 -1994 
    Author : 岩渕 和則
     
    コンポスト化を行う場合、材料の最適含水率がよく問題となるが実験的に50〜60%といわれており、ハンドリングに適した含水率であることも相まって、都市ごみや農産廃棄物コンポストプラントではこれに従って運転されている。筆者はこれを実験的に確認するため、牛ふんを材料に、含水率の上下限界に近い30〜80%の広い範囲でコンポスト化反応速度を測定した。この結果、反応速度の最大値が含水率50〜60%に存在した。では、なぜ反応速度の最大値が含水率50〜60%に存在するのか。本研究はこの疑問を解決するために行った。反応速度の最大値を引き起こす水分環境は存在するが他の水分条件でも肥化反応が停止してしまうような強い反応阻害ではなく、反応は十分進行する。水は溶媒としての役割をもっているだけなので、上記の現象が起きる原因を有機質資材粒子周辺に存在する水膜中の酸素移動量が変化するためではないかと考えた。反応速度の最大値を有機質資材粒子周辺の水膜厚さ(d_L)を変数として整理したのが結果、水膜が3.87×10^<-9>mより厚くなると酸素移動量が漸減し、酸素消費速度が制限されるが、一方水膜厚さが3.87×10^<-9>mより小さくても、水分による微生物活性が徐々に低下したため酸素消費速度が次第に低くなった。したがって水膜厚さ3.87×10^<-9>m付近が最も酸素消費速度(反応速度)が大きくなり、酸素供給の面からと微生物活性の面を総合した堆肥化反応の最適条件と考えられた。
  • 文部科学省：科学研究費補助金(奨励研究(A))
    Date (from‐to) : 1993 -1993 
    Author : 岩渕 和則
     
    生態系保全型農業を展開する場合、農産有機廃棄物の高度な利用がポントとなり、ここでは1.土壌環境に対して負荷抑制できる、良質な堆肥の生成。2.酸化分解発生熱の利用。を目的にしている。これまで、目的に適合した反応制御を行うために好気生分解反応モデルの構築が必要とされるため、反応のメカニズムを検討する目的で、試料の比熱を用いて熱収支解析および酸素ガス収支解析によって熱発生速度および酸素消費速度を求め、これを指標として好気性分解反応過程を考察した。この結果、微生物依存の反応速度は等しくも、試料物性や通気量等の影響を大きく受けた結果、堆肥化過程で生ずる酸化熱による試料温度変化速度は大きく異なる場合があることが指摘された。そこで、試料水分条件の変化が反応速度に及ぼす影響を調べた結果、試料水分条件によって反応速度に差が生じ、特定の水分条件下で最大値をとることが明らかになった。ただし、反応速度の低下といっても堆肥化反応が停止してしまうような強い反応阻害ではなく、反応は十分進行するが熱発生速度や酸素消費速度の値にやや影響がでる程度であることや、水は溶媒としての役割をもっているだけなので、上記の現象が起きる原因を有機質資材粒子周辺に存在する水膜中の酸素移動量の変化に原因があると考えた。堆肥粒子の水膜外周から微生物が付着している粒子表面への酸素移動コンダクタンスは、Fickの第一法則を援用して計算した結果、水膜厚さが薄くなると伴に増加する結果が得られた。また、さらに水分が低い場合に、反応速度の低下が観察されるのは、微生物の水分活性が原因と考えられた。

Industrial Property Rights

  • 特許第4382856号:有機性廃棄物の処理方法及び熱エネルギー利用方法  
    岩渕 和則
  • 特許第4538595号:バイオマス材料の処理方法及び処理装置並びに熱エネルギー利用方法  
    岩渕 和則

Social Contribution

  • バイオマスの資源化とエネルギー化
    Date (from-to) : 2015/08/26
    Role : Lecturer
    Sponser, Organizer, Publisher  : 北海道大学
    Event, Program, Title : 神奈川県議会環境農政常任委員会訪問団への講座
  • 「うんこやごみの有効利用」
    Date (from-to) : 2015/04/22
    Role : Lecturer
    Sponser, Organizer, Publisher  : 北海道大学農学部
    Event, Program, Title : 第２５回時計台サロン 「捨てるにはもったいないー農山村資源の可能性ー」
  • 「うんちがエネルギー？」
    Date (from-to) : 2014/09/06
    Role : Commentator
    Sponser, Organizer, Publisher  : 北海道大学農学部、北海道新聞社編集局
    Event, Program, Title : あぐり大学・親子講座 第５回
  • 地域資源の活用に関する講習会
    Date (from-to) : 2013/11/12-2013/11/15
    Role : Lecturer
    Sponser, Organizer, Publisher  : 北海道平取町
  • 北海道の資源・エネルギーに関するバイオマス利活用の現状と課題
    Date (from-to) : 2013/10/03
    Role : Lecturer
    Sponser, Organizer, Publisher  : （公社）日本技術士会農業部会
    Event, Program, Title : 第40回技術士全国大会農業部会講演会
  • 平成22年度農芸フォーラム講演
    Date (from-to) : 2011/03
    Role : Lecturer
    Sponser, Organizer, Publisher  : 東京都立農芸高等学校
  • 栃木県立真岡高等学校 模擬講義
    Date (from-to) : 2010/10
    Role : Lecturer
    Sponser, Organizer, Publisher  : 宇都宮大学
  • 群馬県立桐生高等学校 出前授業
    Date (from-to) : 2009/11
    Role : Lecturer
  • 平成21年度SPP 「首都圏“食農学”サポーター」育成講座
    Date (from-to) : 2009/07-2009/08
    Role : Presenter
    Sponser, Organizer, Publisher  : 宇都宮大学農学部
    High school students 宇都宮市 東京都立農芸高等学校，東京都立園芸高等学校，東京都立瑞穂農芸高校，東京都立農産高校の生徒約３０名の宿泊型体験学習を企画，運営
  • 群馬県立大泉高等学校 出前授業
    Date (from-to) : 2009/07
    Role : Lecturer
  • 宇都宮大学農学部アグリ支援機構について
    Date (from-to) : -2008/09/05
    Role : Lecturer
    Event, Program, Title : 第２１回国立大学法人共同研究センター専任教員会議
  • バイオマス資源リサイクルを支えるコンポスト化技術
    Date (from-to) : -2008/03
    Role : Lecturer
    Sponser, Organizer, Publisher  : 熊本県八代市
    Event, Program, Title : 八代市バイオマスタウン検討プロジェクト会議
  • 炭酸ガス濃度低減化を目的とした農地からの石油代替資源の生産
    Date (from-to) : -2008/02
    Role : Lecturer
    Sponser, Organizer, Publisher  : 独)北海道農業研究センター
    Event, Program, Title : 平成19年度北海道農業試験研究推進会議 畜産草地部会
  • 生物系廃棄物のリサイクル
    Date (from-to) : 2005/11/18
    Role : Lecturer
    Sponser, Organizer, Publisher  : 宇都宮東高等学校
    Event, Program, Title : 平成17年度高大連携大学講座
  • 地域振興に関する大学の取り組みについて（宇都宮大学アグリ支援機構の取り組み）
    Date (from-to) : 2005/11/17
    Role : Lecturer
    Sponser, Organizer, Publisher  : 農林水産省 農林水産技術会議
    Event, Program, Title : 平成17年度農業中核研究員養成研修会
    農林水産技術会議筑波事務所
  • 生物系廃棄物のリサイクル
    Date (from-to) : 2005/08/24-2005/08/25
    Role : Lecturer
    Event, Program, Title : 宇都宮女子高校 出張講義
  • 地域研究における都県・大学，独法の新しい連携を求めて－宇都宮大学農学部の取り組みー
    Date (from-to) : 2005/01
    Role : Lecturer
    Event, Program, Title : 関東東海北陸試験研究推進会議
    中央農業研究センター
  • 第３回農学系JABEE 審査員研修会
    Date (from-to) : 2004/07/31-2004/08/01
    Role : Others
    Sponser, Organizer, Publisher  : JABEE （日本技術者教育認定機構）
  • シンポジウム「農業機械・施設・利用技術の『人類技術史』への文脈化と接合」実行委員
    Date (from-to) : 2004/07/09
    Role : Organizing member
    Sponser, Organizer, Publisher  : 日本学術会議農業機械学研究連絡委員会，日本学術会議農業機械学研究連絡委員会農業機械・施設・利用技術の状況への文脈化と接合専門委員会実行委員会委員
    日本学術会議大会議室

Media Coverage

  • 活かそうバイオマス 創ろう循環型社会
    Date : 2005/10/30
    Publisher, broadcasting station: 栃木テレビ
    Program, newspaper magazine: クローズアップとちぎ
    Media report
  • 農業試験研究の展開
    Publisher, broadcasting station: 栃木テレビ
    Program, newspaper magazine: クローズアップとちぎ
    Media report

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