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脱窒に関する一説への疑問

2015-10-30View Original

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曝気槽から出た活性汚泥スラリーの溶存酸素が0.5未満で、かつ炭素窒素比が著しく不均衡な場合、二次沈殿池に留まっている活性汚泥は浮上する現象が起こります。では、溶存酸素が0.5低下することで後に脱窒が起こるのは理解できますが、その後の炭素窒素比の深刻な不均衡はどう説明すればいいのでしょうか?
Reply #22015-10-30
脱窒細菌が脱窒を行うには炭素源が必要であり、つまり処理水のBODが非常に低い場合、溶存酸素が低くても脱窒は起こりにくい。

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