活性汚泥の管理指標に関する研究(第1報)汚泥の還元条件下の亜硝酸性窒素生成パタン

概要

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For the purpose of finding a control index of activated sludge, the time course patterns of nitritenitrogen content in the anaerobically treated activated sludge were tested. Four kinds of the time course patterns of NO_2-N content were found, termed A, B, C, and D. In type A, NO_2-N content increased and the NO_2-N content after 5 hr was higher than the initial. Type B was similar to type A, but NO_2-N content after 5 hr was lower the initial. In type C, NO_2-N content decreased with time. In type D, NO_2-N was not detected for 5 hr. When the condition of activated sludge became worse, the time course patterns of NO_2-N content changed from type A, type B, and type C to type D, and as the condition recovered, the time course patterns changed from type D, to type C, type B, and to type A. The time course patterns of NO_2-N content as a control index for activated sludge indicates the conditions of activated sludge as do SVI and removal rate of BOD, indices used commonly. The change of the patterns shows the change in the conditions of activated sludge more quickly than that of other indices.
公益社団法人日本薬学会の論文
1979-02-28