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1996 Fiscal Year Final Research Report Summary

Simultaneous nitrification and denitrification treatment using a bio-electro reactor

Research Project

Project/Area Number 07650635
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Civil and environmental engineering
Research InstitutionGUNMA UNIVERSITY

Principal Investigator

KURODA Masao  Gunma University, Faculty of Eng., Professor, 工学部, 教授 (40008446)

Co-Investigator(Kenkyū-buntansha) WATANABE Tomohide  Gunma University, Faculty of Eng., Research Associate, 工学部, 助手 (60251120)
Project Period (FY) 1995 – 1996
KeywordsAdvanced treatment / Nitrification / Denitrification / Bio-electro reaction system / Nitrifying bacteria / Denitrifying bacteria / Electrolysis / Hydrogen
Research Abstract

Feasibility of a novel simultaneous nitrification and denitrification treatment using a bio-electro reactor to which was applied biological and electrochemical reactions was investigated. The following results were obtained in this study.
1.Nitrification proceeded by nitrifying bacteria immobilized on the anode when electric current was applied to the electrodes in ammonia-nitrogen contained water. The nitrification rate promoted with an increase in the applied electric current, but decreased under the condition of current density over 0.15 mA/cm^2. Therefore, there may be the optimum operational condition of current density.
2.Nitification and denitrification proceeded simultaneously by using a bio-electro reactor which consisted of the carbon electrodes immobilized nitrifying bacteria and denitrifying bacteria as anode and cathode, respectively, when an electric current was applied. The nitrification and denitrification occurred by utilizing oxygen and hydrogen produced by eletrolysis of water, respectively and promoted with an increase in the applied electric current. However, these efficiencies decreased under the condition over a certain value of the applied electric current.
3.DO concentration in the bulk liquid influenced both nitrification and denitrification rates. The high-DO concentration in the bulk liquid led to high nitrification and low denitrification efficiencies in the bio-electro reactor. However, nitrification was promoted and denitrification occurred in the cathodic biofilm by the applied electric current even at high DO concentration in the bulk liquid.
4.Performance of the bio-electro reaction method for the treatment of the municipal wastewater was investigated by setting the electrodes immobilized nitrifying bacteria and denitrifying bacteria into an aerated biofilter reactor. Nitrification and denitrification efficiency increased by the applied electric current and the degradation of BOD constituents was also enhanced.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] Kuroda,M.et al.: "Simultaneous Oxidation and Reduction Treatments of Polluted Water by aBio-electro Reactor" Water Science and Technology. 34. 101-108 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 渡辺智秀ら: "バイオエレクトロ法によるアンモニア性窒素の硝化特性" 土木学会第50年次学術講演会講演概要集第2部(B). 1112-1113 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 黒田正和ら: "バイオエレクトロ法による廃水の硝化脱窒同時処理" 化学工学会第28回秋季大会研究発表講演要旨集. 第1分冊. 297-297 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 黒田正和ら: "バイオエレクトロ法の接触曝気プロセスへの応用-低温時の処理特性-" 第30回日本水環境学会年会講演集. 469-469 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kuroda,M.et al.: "Simultaneous Oxidation and Reduction Treatments of Polluted Water by a Bio-electro Reactor" 18th I.A.W.Q.Biennal International Conference. Preprint Book 5. 81-88 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 史 紅ら: "アンモニア性窒素の硝化・脱窒同時処理への固定化微生物電極法の適用" 土木学会第33回環境工学研究フォーラム講演集. 66-68 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kuroda, M.et al.: "Simultaneous Oxidation and Reduction Treatments of Polluted Water by a Bio-electro Reactor" Wat.Sci.and Tech. Vol.34. 101-108 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Watanabe, T.et al.: "Nitrification of ammonia-nitrogen by a bio-eletro reaction method in Japanese" Preprint of 50th annual meeting of JSCE. 1112-1113 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kuroda, M.et al.: "Simultaneous nitrification and denitrification treatments of wastewater by bio-electro reactor in Japanese" Preprint of 28th antumn meeting of SCEJ. 297 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kuroda, M.et al.: "Effect of electrochemical method in an aerated biofilter process in Japanese" Preprint of 30th annual meeting of JSWE. 469 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kuroda, M.et al.: "Simultaneous oxidation and reduction treatments of polluted water by a bio-electro reactor" Water Quality International '96-18th I.A.W.Q.Biennal International Conference, Preprint Book 5. 81-88 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shi, P.et al.: "Application of bio-eletro reaction system to treatment of simultaneous nitrification and denitrification in Japanese" Preprint of 33rd forum of environmental engineering research. 66-68 (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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