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Theoretical and practical considerations on optimal design & operation conditions for the step-feed anoxic-oxic activated sludge process

Research Project

Project/Area Number 06650611
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Civil and environmental engineering
Research InstitutionRitsumeikan University

Principal Investigator

FUJII Shigeo  Ritsumeikan Univ., Fac of Scie.& Engg., Associate Prof., 理工学部, 助教授 (10135535)

Co-Investigator(Kenkyū-buntansha) ICHIKI Atsushi  Ritsumeikan University Fac.of Scie.& Engg., Instructor, 理工学部, 助手 (90268152)
HIGUCHI Takashi  Ritsumeikan University Fac.of Scie.& Engg., Assistant Prof., 理工学部, 講師 (60288628)
AMANO Kouji  Ritsumeikan University Fac.of Scie.& Engg., Associate Prof., 理工学部, 助教授 (80167957)
YAMADA Kiyoshi  Ritsumeikan University Fac.of Scie.& Engg., Professor, 理工学部, 教授 (80066696)
合田 健  立命館大学, 理工学部, 教授 (70101037)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1996: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1995: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1994: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsBiological nitrogen removal / Step-feed / Activated sludge / Stoichiometry / Simulation / Laboratory experiments / Nitrification / Denitrification / 活性汚泥法 / 理論解析 / 数値計算 / 循環 / 学論解析 / 数値実験
Research Abstract

The main objective of this project is to establish the optimal design and operation conditions for the step-feed anoxic-oxic activated sludge process. To achieve this objective, we conducted four kinds of research work, (1) review of experimental reports, (2) stoichiometrical analysis, (3) laboratory experiment and (4) numerical calculation. Then, the following results are obtained :
(1) In the work of literature review, more than one hundred experiments were collected from journals and conference proceedings, and the quantitative relationships between nitrogen removal efficiency and many design/operation conditions were obtained.
(2) In the stoichiometrical analysis, chemical and biological reactions in reactors were simplified to make all chemical changes the mathematical functions of substrate, DO,NH_4-N,NO_3-N and alkalinity. Then, effluent water quality were formulated with such water quality concentrations in influent and operational conditions such as step ratio and recycle ratio. Consequently, the operational conditions which make the effluent T-N minimum were proposed.
(3) To verify the above theory, laboratory tests were conducted more than 20 times with artificial sewage. In a series of experiments, step ratio, recycle ratio and influent intensity were selected as experimental parameters and changed in each run. The experimental results approximately supported the above theory, although some gabs remained a little.
(4) Numerical calculation was conducted to explain the gabs between experimental results and theoretical values. The models used for this calculation have 18 variables and express many types of water quality items. The simulation showed the gabs are mainly caused by the reactions related to activated sludge, which were not included in the theoretical analysis.
Finally, it was demonstrated that the equations obtained from the stoichiometrical analysis are available to know the optimal conditions for step-feed anoxic-oxic activated sludge process.

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] 藤井 滋穂, 李 丙大: "嫌気好気循環活性汚泥法の理論的窒素除去率の検討" 土木学会年次学術講演会講演概要集. 49. 1118-1119 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 藤井 滋穂: "ステップフィード嫌気好気活性汚泥法の最適ステップ率の理論及び数値解析" 土木学会年次学術講演会講演概要集. 50. 1104-1105 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Shigeo FUJII: "Theoretical analysis on nitrogen of the step-feed anoxic-oxic activated sludge process and its application for the optimal operation" Water Science and Technology. 34. 459-466 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 藤井 滋穂, 中西 康弘, 常岡 信希: "ステップフィード嫌気好気活性汚泥法におけるステップ率の窒素除去率に対する影響" 生物利用新技術研究シンポジウム論文集. 4. 6-10 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 奥村 豪彦, 藤井 滋穂, 中西, 常岡: "ステップフィード嫌気好気活性汚泥法の操作条件の影響に関する実験的検討" 土木学会関西支部年次学術講演会. (印刷中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.Fujii, Y.Nakanishi, N.Tsuneoka: "The effects of step ratio and recycle ratio on nitrogen removal of the step-feed anoxic-oxic activated sludge process" Int.l Conf.on Biological Nitrogen Removal. 3(in Printing). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Shigeo FUJII & Byoung-Dea Lee: "On the theoretical nitrogen removal efficiency of the anoxic-oxic recycling activated sludge process (in Japanese)" Proc of annual conference of the Japan Society of Civil Engineers. Vol.49, No.2. 1118-1119 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Sigeo FUJII: "Theoretical analysis and numerical calculation for nitrogen removal efficiency in the step-feed anoxic-oxic activated sludge process (in Japanese)" Proc of annual conference of the Japan Society of Civil Engineers. Vol.50, No.2. 1104-1105 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Sigeo FUJII: "Theoretical analysis on nitrogen of the step-feed anoxic-oxic activated sludge process and its application for the optimal operation" Water Science and Technology. Vol.34, No.1/2. 459-466 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.FUJII,Y.NAKANISHI & N.TSUNEOKA: "Effects of the step ratio on nitrogen removal efficiency in the step-feed anoxic-oxic activated sludge process (in Japanese)" Proc.of the Symposium on New Biotechnology. Vol.4. 6-10 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.OKUMURA,S.FUJII,Y.NAKANISHI & N.TSUNEOKA: "Laboratory study on the effects of operational conditions to performance of the step-feed anoxic-oxic activated sludge process (in Japanese)" Proc of Kansai regional conference of the Japan Society of Civil Engineers. (in Printing). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.FUJII,Y.NAKANISHI N.TSUNEOKA: "The effects of step ratio and recycle ratio on nitrogen removal of the step-feed anoxic-oxic activated sludge process" Intl.Conf.on Biological Nitrogen Removal. Vol.3 (in Printing). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 奥村豪彦・藤井滋穂他: "ステップフィード嫌気好気活性汚泥法の操作条件の影響に関する実験的検討" 土木学会関西支部年次学術講演会. (印刷中). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 藤井滋穂・中西康弘・常岡信希: "ステップフィード嫌気好気活性汚泥法におけるステップ率の窒素除去率に対する影響" 生物利用新技術研究シンポジウム論文集. Vol.10. 6-10 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Shigeo FUJII: "Theoretical analysis on nitrogen of the step-feed anoxic-oxic activated sludge process and its application for the optimal operation" Water Science and Technology. Vol.34,Nol-2. 459-466 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] S FUJII: "Theoretical Analysis on Nitrogen Remoual of the Step-Feed Anoxic-Oxic Actiuated Studge Process and its Application for the Optimal Operation" Biennial IAWQ International Conference. 18(in printing). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 藤井滋穂・安藤武智他: "処理場水質管理ソフトへの汎用汚泥処理モデルの組み込みと汚泥プロセスの機能評価" 日本水環境学会年会講演集. 30(印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 藤井滋穂・李炳大: "嫌気好気循環活性汚泥法の理論的窒素除去率の検討" 土木学会年次学術講演会講演概要集II. 49. 118-119 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 藤井滋穂・川崎重純・浦野敦只: "ビジュアルバイミックによる下水処理場水質管理ソフトの開発" 下水道研究発表会講演集. 32(印刷中). (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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