Search Results 1-20 of 591

  • A Laboratory Experiment System for Developing Mine Drainage Treatment Technologies Using Constructed Wetlands : Sequencing Batch Treatment of Cd-Containing Neutral Mine Drainage

    SODA Satoshi , SASAKI Ryo , NGUYEN Thi Thuong , HAYASHI Kentaro , KANAYAMA Akihiro

    環境資源工学 = Resources processing : 資源処理技術 67(3), 111-116, 2021

  • Simple Pretreatment Method for Tritium Measurement in Environmental Water Samples using a Liquid Scintillation Counter

    NAKASONE Shunya , SHIMA Nagayoshi , ATARASHI-ANDOH Mariko , FUKUTANI Satoshi , NAKAMURA Kaori , ISHIMINE Akinobu , FURUKAWA Masahide , TANAKA Masahiro , AKATA Naofumi , YOKOYAMA Sumi , TAKAHASHI Tomoyuki , OTA Masakazu , KAKIUCHI Hideki , SUGIHARA Shinji , HIRAO Shigekazu , MOMOSHIMA Noriyuki , TAMARI Toshiya

    … however, the same level of results was achieved in 5 min. The tritium concentration in each experiment was within the standard deviation. … These results suggested that proposed batch method involving ion exchange resins and activated carbon had negligible effect on tritium measurement. …

    Plasma and Fusion Research 16(0), 2405035-2405035, 2021

    J-STAGE 

  • Evaluation of UV Disinfection on Inactivation of Indicator Microorganisms and Ecotoxicity after Temporary Wastewater Treatment in Sewage Treatment Plants Damaged by Earthquake and Tsunami Disaster  [in Japanese]

    PARK Kyoungsoo , PARK Inkoo , YAMASHITA Naoyuki , IHARA Masaru , TAKEUCHI Haruka , TANAKA Hiroaki

    <p>　東日本大震災に伴う大津波により被災した下水処理場では，流入水を沈殿や接触酸化法などで処理後，塩素消毒を行ったが，それらの暫定処理と塩素消毒ではウイルスの消毒効果が小さく，塩素消毒では残留塩素による生態毒性の問題がある．本研究は塩素に代わって紫外線消毒を行う場合を想定し，被災下水処理場から流入水/初沈越流水，接触酸化処理水を採水し，22Lの円筒形照射装置（波長254nm，UVラン …

    Journal of Japan Sewage Works Association 58(701), 102-113, 2021

    J-STAGE 

  • Influence of pH and Eh on Hexavalent Chromium Level which Occurs in Street Inlet Water in Komatsugawa District, Edogawa-ku, Tokyo  [in Japanese]

    MATSUDA Soichiro , WATANABE Izumi , GOMI Ayano , HOSONO Tatsuya , OZAKI Hirokazu

    … In order to explain why such high concentration of Cr(VI) has been detected under the reductive condition, influence of pH, Eh on redox reaction of Cr(VI) was investigated by batch experiment using Cr(VI) solution prepared from chemicals and the contaminated water sample collected from the polluted inlet. … The results of batch experiment also showed that, with the lower Eh condition, the more Cr(VI) was reduced when sample water collected form the polluted inlet was used. …

    Journal of Environmental Chemistry 31(0), 1-8, 2021

    J-STAGE 

  • METHOD OF LEACHING FROM SOILS IN THE GROUNDWATER NITRATE POLLUTED AREA  [in Japanese]

    中川 啓 , 竹盛 匠吾 , 朝倉 宏

    地球環境研究論文集 : 地球環境シンポジウム 28, 1-8, 2020

  • A Study on Performance Improvement of Hyperledger Fabric Through Batched Chaincode

    JungWon Lee , Park Sejin

    IEICE Proceeding Series (62), 259-262, 2020

    DOI 

  • Production Scheduling Method to Reduce Fuel Costs of Hot Rolling Processes  [in Japanese]

    DOAN Takeru , NAGAHARA Satoshi , CHIDA Takafumi , KATSUBE Junichi , ADACHI Tooru , MITA Satoru

    … <p>In order to minimize the fuel cost for heating steel ingots in hot rolling process, it is important to plan (1) batch formation to increase filling rate in furnaces and (2) work schedule to reduce stagnation of ingots in furnaces. … However, the conventional divide-and-conquer methods cannot realize both high filling rate and small stagnation because of planning batch formation and work schedule sequentially. …

    The Proceedings of Mechanical Engineering Congress, Japan 2020(0), S14202, 2020

    J-STAGE 

  • Study on Productivity Improvement and Clinker Formation Mechanism of High-density Small-diameter Biomass Solid Fuel  [in Japanese]

    Kawamura Atsuhiro , Ida Tamio

    … (1) It was found that the productivity of small-diameter bio-coke can be increased by 2.6 to 3.3 times that of the basic system by linking two semi-automated batch manufacturing systems. … (2) Combustion comparison experiment with mixed combustion rate up to about 10% suggested that clinker formation was suppressed.</p> …

    The Proceedings of the Thermal Engineering Conference 2020(0), 0141, 2020

    J-STAGE 

  • THERMOPHIRIC HIGH SOLID CO-DIGESTION OF EXCESS SLUGE AND RICE STRAW IN A OXYDATION DITCH PLANT -A PILOT SCALE PLANT EXPERIMENT-  [in Japanese]

    YAMAMOTO-IKEMOTO Ryoko , SHIMIDZU Hiroyuki , TOGARI Taketo , MISAKI Takero , MATSUURA Norihisa , HONDA Ryo

    <p>　小規模下水処理場にメタン発酵を導入するために，オキシデーションディッチ汚泥（OD汚泥）と稲わらを混合して高濃度でメタン発酵を行うプロセスを提案し，パイロットプラント実験を行った．投入基質濃度9%（OD汚泥6%+稲わら3%），SRT15日の条件で，アンモニア性窒素(TAN)濃度が2,500mg/L以上に増加したにもかかわらず，安定したメタン発酵が進行した．投入CODベースのメタン …

    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 76(7), III_471-III_479, 2020

    J-STAGE 

  • EVALUATION OF METHANE CONVERSION RATE OF SOLID BIOMASS VIA COD<sub>Cr</sub> ANALYSIS FOR INTRODUCING ANAEROBIC DIGESTION  [in Japanese]

    MISAKI Takao , YAMAMOTO-IKEMOTO Ryoko

    <p>　固形バイオマスのメタン発酵処理の導入を検討するためには，各バイオマスのメタン転換率の評価が重要である．本研究では，肥料等試験法に準拠した簡易COD<sub>Cr</sub>分析方法を提案し，142種類の様々なバイオマスのCOD<sub>Cr</sub>値を本方法で求めて，JIS方法で求めたCOD<sub>Cr</ …

    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 76(7), III_461-III_470, 2020

    J-STAGE 

  • Influence of pH and Eh on hexavalent chromium level which occurs in street inlet water in Komatsugawa district, Edogawa City, Tokyo  [in Japanese]

    Matsuda Soichiro , Ozaki Hirokazu , Gomi Ayano , Hosono Tatsuya , Watanabe Izumi

    <p>江戸川区小松川地区における工場跡地のCr(Ⅵ)汚染では, 現在も道路わき雨水ます内滞留水で高濃度のCr(Ⅵ)(＞150 mg/L)が検出される. 現場において還元的な環境(＜0 mV)ほど高濃度のCr(Ⅵ)が検出されており, その要因を考察するため, 硫酸鉄(II)によるCr(Ⅵ)の還元バッチ試験を異なる pH, Eh条件にて実施した. その結果, 汚染水試料においてpHが高くな …

    Abstracts of Annual Meeting of the Geochemical Society of Japan 67(0), 109, 2020

    J-STAGE 

  • METHOD OF LEACHING FROM SOILS IN THE GROUMDWATER NITRATE POLLUTED AREA  [in Japanese]

    NAKAGAWA Kei , TAKEMORI Shogo , ASAKURA Hiroshi

    <p>　地下水の硝酸性窒素汚染は世界中で深刻化しており，研究対象地においても，地下水環境基準の超過率は高い状態にある．一般に土壌中の成分の溶出量や含有量を調べるには，振とうによるバッチ試験が適用される．本研究では，カラム試験で得られる破過曲線から硝酸イオン溶出量を評価し，バッチ試験による溶出方法の妥当性について検討を加えた．その結果，硝酸イオンの場合，溶出カラム試験では固液比1:3で十 …

    Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 76(5), I_1-I_8, 2020

    J-STAGE 

  • Nitrogen and Oxygen Isotope Signatures of Nitrogen Compounds during Anammox in the Laboratory and a Wastewater Treatment Plant

    Kotajima Shotoku , Fujitani Hirotsugu , Ushiki Norisuke , Tsuneda Satoshi , Yoh Muneoki , Koba Keisuke , Ikeda Daisuke , Terada Akihiko , Isaka Kazuichi , Nishina Kazuya , Kimura Yuuya , Makabe Akiko , Yano Midori

    … We performed batch incubation experiments with an anammox-dominated biomass to investigate nitrogen (N) and oxygen (O) isotopic fractionation factors during anammox and also examined apparent isotope fractionation factors during anammox in an actual wastewater treatment plant. … We conducted one incubation experiment with high <i>δ</i><sup>18</sup>O of water to investigate the effects of water <i>δ</i><sup>18</sup>O. …

    Microbes and Environments 35(4), n/a, 2020

    J-STAGE 

  • Calcined Scallop Shells for Phosphate Adsorption in Aqueous Solution

    IZZA Aqidatul , KOJIMA Takashi , AMANO Yoshimasa , MACHIDA Motoi

    … The influences of calcination temperature of scallop shells, pH, adsorption time and concentration on the phosphate adsorption using CSS were studied in batch adsorption experiment. …

    Journal of Environmental Chemistry 30(0), 119-124, 2020

    J-STAGE 

  • Improving Potassium Recovery from Swine Wastewater and Evaluating the Effect of Recovered Solution on Biological Treatment  [in Japanese]

    Dote Yutaka , Sekito Tomoo

    養豚廃水からの N, P, K 同時回収における K の回収率を向上させることを目的に pH10～11 の条件で回収実験を行った。また，回収後溶液の生物処理に与える影響を明らかにすることを目的として回分式活性汚泥処理を行った。その結果，P 残存濃度を排水基準以下に保ち，80 % 以上の高い回収率で K と N を回収できる条件は，pH＝10.5, P/(N＋K)＝1.3, Mg/P＝1.2であった …

    Journal of the Japan Society of Material Cycles and Waste Management 31(0), 38-46, 2020

    J-STAGE 

  • Reaction Heat Control for Steam Reforming of Ethanol with Ni-supported Latent Heat Storage Grain  [in Japanese]

    Sakai Hiroki , Hasegawa Yuta , Kurniawan Ade , Nomura Takahiro , Akiyama Tomohiro

    … Intermittency of waste heat from batch processes is a barrier to applying heat recovery systems to steel plant. … The result of the catalytic test indicated side reaction occurred in the experiment. …

    Tetsu-to-Hagane 106(8), 534-541, 2020

    J-STAGE 

  • Preliminary Investigation of Pretreatment Methods for Liquid Scintillation Measurements of Environmental Water Samples Using Ion Exchange Resins

    NAKASONE Shunya , SHIMA Nagayoshi , ATARASHI-ANDOH Mariko , FUKUTANI Satoshi , ISHIMINE Akinobu , FURUKAWA Masahide , TANAKA Masahiro , AKATA Naofumi , YOKOYAMA Sumi , TAKAHASHI Tomoyuki , OTA Masakazu , KAKIUCHI Hideki , SUGIHARA Shinji , HIRAO Shigekazu , MOMOSHIMA Noriyuki , TAMARI Toshiya

    … This paper presents an evaluation of a rapid pretreatment method for tritium analysis, that uses ion exchange resins (the batch method). … Under the conditions of Experiment-3 (0.3 g, 0.3 g and 0.6 g of PCH, PAO and activated carbon, respectively) and with a stirring time of 5 min, electrical conductivity values of less than 1 mSm^<−1> …

    Plasma and Fusion Research 15(0), 2405027-2405027, 2020

    IR  J-STAGE 

  • Decomposition of organic matter in effluent of biological treatment of sewage by O<sub>3</sub>/H<sub>2</sub>O<sub>2</sub> Advanced Oxidation Process  [in Japanese]

    Hamasaki Tatsuhide , Chen Yunqi , Mizuno Tadao , Tsuno Hiroshi

    <p>　下水生物学的処理水を対象として，オゾン/過酸化水素処理による有機物の分解実験を，半回分式実験装置を用いて行った．通気したオゾン濃度は50mg/Lで，過酸化水素は初期に0，7.5，30，75または150mg/Lを添加した．生物学的処理水の場合，初期過酸化水素濃度は30mg/Lが最も速いTOC除去速度が得られ，反応器当たり0.08～0.11mgC/L/minであるのに対し，生物学的 …

    Journal of Japan Sewage Works Association 57(687), 116-124, 2020

    J-STAGE 

  • Effects of Elevated Irradiance, Temperature, and Rapid Shifts of Salinity on the Chlorophyll a Fluorescence (OJIP) Transient of Chattonella marina var. antiqua

    QIU Xuchun , WU Min , MUKAI Koki , SHIMASAKI Yohei , OSHIMA Yuji

    … Short–term irradiance shifts experiment showed that a 4–h exposure to elevated irradiance (EI, 1100 ± 50 μmol photons m−2 s−1) significantly decreased the Fv /Fm ratio, PIABS, and ETo/RC, while increased the ABS/RC, TRo/RC, and DIo/RC of Chattonella cells. … During batch cultures, repeated irradiance shifts (exposure to EI for 4 h per day) significantly decreased the maximum cell densities of C. …

    Journal of the Faculty of Agriculture, Kyushu University 64(2), 293-300, 2019-09-02

    IR  DOI 

  • Identification of 1-dof system based on the maximum likelihood estimation using the analytical solution of Fokker-Planck equation:(expansion to recursive algorithm)  [in Japanese]

    TAKATA Soichiro

    … At first, batch algorithm is described. … The algorithm is obtained by expansion of estimation formula of batch algorithm. … The numerical identification experiment is conducted in order to confirm the estimation operation of our proposed method. …

    The Proceedings of the Symposium on Evaluation and Diagnosis 2019.18(0), 104, 2019

    J-STAGE 

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