間欠曝気式ラグーンにおける高率窒素除去に関する研究-II : 硝化・脱窒活性について

概要

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To clarify the mechanism of the nitrogen removal at a high rate and the best aeration conditions for removing nitrogen at high rates, the activities of nitrification and denitrification and the relation between the aeration condition and the removal rate of nitrogen were examined. The nitrate N in lagoon water increased remarkably during the period of on-aeration and decreased the same way under the condition of off-aeration, but nitrite and ammonium N usually did not change so much between the on- and off-aeration conditions. A shortening of aeration time during treatment decreased nitrate N in the effluent water, but increased ammonium N. However, the operation under an adequate time of aeration was found to be able to maintain these inorganic nitrogen compounds at a very low level and to raise the removal rate of nitrogen in waste water significantly.
公益社団法人日本水産学会の論文