Alcaligenes faecalis を導入した活性汚泥法の通性嫌気条件におけるN_2O放出および排水処理特性 Characteristics of N_2O Emission and Wastewater Treatment in An Anoxic Activated Sludge Process Added with Alcaligenes faecalis

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Alcaligenes faecalis, a typical heterotrophic nitrifying and denitrifying bacterium, was added into activated sludge and was made to be a dominant species in the activated sludge ecosystem under anoxic conditions. Influent COD to total nitrogen ratios (C:N) and quantities of the inoculated A. faecalis were changed to test the responses of the systems. The systems' behaviors of N2O emission and wastewater treatment were evaluated. On the other hand, a batch experiment was also conducted in which Helium (He) was used to bubble an activated sludge system. Characteristics of N2O emission from the system were tested. Experimental results showed that N2O production of the systems containing A. faecalis was generally about 50% less than those of the control reactors containing only activated sludge. In addition, the former systems had a higher total nitrogen removal capability, and their average total nitrogen removal efficiencies were about 7-56% higher than those of the control activated sludge systems. Moreover, TOC removal efficiencies of the systems containing A. faecalis were a little higher than those of the control systems. On the other hand, more alien A. faecalis addition and higher influent C:N ratio led to lower N2O emission and better effluent water qualities. Therefore, increasing A. faecalis' population in activated sludge should be encouraged for controlling N2O emission and upgrading wastewater treatment capability under anoxic conditions. Batch experiments showed that bubbling led to higher N2O production. A critical He flowrate existed corresponding to the highest N2O production yield.

収録刊行物

  • 水環境学会誌 = Journal of Japan Society on Water Environment  

    水環境学会誌 = Journal of Japan Society on Water Environment 22(6), 511-517, 1999-06 

    公益社団法人 日本水環境学会

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各種コード

  • NII論文ID(NAID)
    10004452652
  • NII書誌ID(NCID)
    AN10372439
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09168958
  • NDL 記事登録ID
    4768698
  • NDL 雑誌分類
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL 請求記号
    Z16-1045
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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