微小電極を用いた活性汚泥内の酸素消費機構の解析  [in Japanese] In Situ Analysis of Oxygen Consumption in Activated Sludge as Determined by the Use of Microelectrodes  [in Japanese]

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Author(s)

    • 佐藤 久 SATOH Hisashi
    • 八戸工業大学工学部環境建設工学科 Department of Environmental and Civil Engineeiing, Hachinohe Institute of Technology
    • 小野 英樹 ONO Hideki
    • 八戸工業大学工学部環境建設工学科 Department of Environmental and Civil Engineeiing, Hachinohe Institute of Technology

Abstract

Microelectrode was used to investigate oxygen consumption mechanism in activated sludge. Oxygen fluxes and distributions of oxygen consumption activity were determined from the microprofiles. The spatial distributions of oxygen and nitrate consumption activity were heterogeneous. Under conditions in which oxygen concentration in the bulk liquid was less than 120<i>μ</i>M, oxygen consumption activity was high in the outer zone and anoxic zone developed in the center part of the activated sludge. Oxygen consumption activity of the activated sludge was comparable to that of the domestic wastewater biofilm. Distribution of nitrate consumption activity showed that denitrification occurred in the anoxic zone of the activated sludge. Oxygen consumption activity increased as oxygen concentration in the bulk liquid increased, which resulted in increase in oxygen fluxes of the activated sludge. In contrast, when oxygen concentration in the bulk liquid was more than 120<i>μ</i>M, oxygen fluxes were unchanged due to limitation of microbial density. Oxygen fluxes at more than 120<i>μ</i>M of oxygen in the bulk liquid were lower than those at about 120<i>μ</i>M of oxygen.

Journal

  • Journal of Japan Society on Water Environment

    Journal of Japan Society on Water Environment 25(1), 27-32, 2002-01-10

    Japan Society on Water Environment

References:  18

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008006292
  • NII NACSIS-CAT ID (NCID)
    AN10372439
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    09168958
  • NDL Article ID
    6042308
  • NDL Source Classification
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL Call No.
    Z16-1045
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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