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A study on the control of sewage activated sludge bulking

Research Project

Project/Area Number 61550394
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 都市工学・衛生工学
Research InstitutionUniversity of Yamanashi

Principal Investigator

KOHNO Tetsuro  Dept. of Environmental Engineering, Faculty of Engineering, Yamanashi University, Associate Professor, 工学部環境整備工学科, 助教授 (50111779)

Co-Investigator(Kenkyū-buntansha) KAZAMA Futaba  ibid, Assistant, 工学部環境整備工学科, 助手 (00115320)
NAKAYAMA Ooki  ibid, Professor, 工学部環境整備工学科, 教授 (50020334)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1988)
Budget Amount *help
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1987: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1986: ¥800,000 (Direct Cost: ¥800,000)
KeywordsActivated sludge / Bulking / Type II-3 / Type 021N / Physiology / Sulfur-bacteria / A / O operation / 膨化 / 混合栄養 / II-3 / 021N / 糸状性バルキング / イオウ細菌 / 【II】-3タイプ / O21N / 硫化水素 / チオ硫酸 / 嫌気・好気法
Research Abstract

The aim of the present study is to find a novel way in the control of bulking with special interest in sewage activated sludge. For this, the study was conducted both with isolates of Type II-3 which is the main causative organism for sewage, and with activated sludge.
<In axenic culture with isolates of Type II-3>
Type II-3 is gram-negative, and deposits both poly-phosphate and PHB. Oxidase is positive but catalase is positive or negative. Its unique nature is to deposit sulfur granules in the cell by oxidation of hydrogen sulfide and thiosulphate. Fifty-five strains were isolated in axenic culture from activated sludge. Morphology, physiology, and dissimilatory nutrition on inorganic sulphur compounds were clarified with eight isolates.
<Bulking control by means of A/O operation of activated sludge>
Bulking activated sludge by Type II-3 developed by continuous feeding of wastewater containing glucose and polypeptone as carbon sources was further cultivated under different modes of A/O operation to find the exact conditions to suppress filamentous bacteria including Type II-3 by observing both metabolisms of phosphate and organic matter, and the fate of each type of filamentous bacteria under microscopy. As the result, it was confirmed that A/O operation is a novel way to suppress filamentous bacteria when organic matter was simultaneously removed with the release of cellular poly-phosphate in the anaerobic phase. Although the reasons why filamentous bacteria are suppressed by A/O operation are still not fully understood, it was clarified that phosphate released under the anaerobic phase associates with suppression of filamentous bacteria including Type II-3, Sphaerotilus, and Thiothrix(Type II-10) by pure culture study. Its high concentration is toxic to their growth, and also release of phosphate lowers the pH of activated sludge suspensions to a range in which these filamentous bacteria are suppressed.

Report

(3 results)
  • 1988 Final Research Report Summary
  • 1987 Annual Research Report
  • 1986 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] 河野哲郎: 用水と廃水. 29. 354-362 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 河野哲郎, 佐藤伸: 用水と廃水. 29. 246-249 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Tetsuro Kohno: Proceedings of IAWPRC's International Conference on Microfiolugy of Water and Wastewater. 39-1-39.7 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] Tetsuro,: Wat.Si.Technol.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 河野哲郎,中山大樹,猪又正一: 用水と廃水.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 河野哲郎,中山大樹,猪又正一: Water Research.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T. Kohno.: "Control of bulking in a batch activated sludge process" J. Water and Wastewwater. 29. 354-362 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T. Kohno; S. Satoh.: "Rapid determination of PHB in activated sludge by the disk assay" J. Water and Wastewater. 29. 246-249 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T. Kohno.: "Morphology, Physiology, and nutrition of a sulphur-oxidizing filamentous organism isolated from activated sludge" Proceedings of IAWPRC's International Conference on Microbiology of Water and Waste Water,. 1. 39-1-39-7 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T. Kohno.: "ibid" Wat. Sci. Tecnol.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] T. Kohno,; O. Nakayama,; S. Inoamata.: "Discrimination, physiology, dissimilatory sulfur nutrition of filamentous sulfur bacteria in activated sludge" J. Water Wastewater.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1988 Final Research Report Summary
  • [Publications] 河野哲郎: 用水と排水. 29. 354-362 (1987)

    • Related Report
      1987 Annual Research Report
  • [Publications] Tetsuro Kohno: Proceeding of IAWPRC International Conterence on water and waste water Microbiology. 39-1-39-7 (1988)

    • Related Report
      1987 Annual Research Report
  • [Publications] 河野, 中山, 風間: Water Research.

    • Related Report
      1987 Annual Research Report
  • [Publications] 河野, 中山, 風間: 水質汚濁研究.

    • Related Report
      1987 Annual Research Report
  • [Publications] 河野哲郎: 京都大学環境衛生工学研究会第8回シンポジュウム講演論文集. 163-169 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 河野哲郎: 用水と廃水. 29. 32-35 (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 河野哲郎: 用水と廃水. 29. (1987)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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