Metabolic Behavior of Denitrifying Phosphate-Accumulating Organisms under Nitrate and Nitrite Electron Acceptor Conditions
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概要
- 論文の詳細を見る
The effects of various types of electron acceptors on anoxic phosphorus uptake were investigated in detail to obtain a better insight into the metabolic behavior of denitrifying phosphate-accumulating organisms. Batch experimental tests under three different electron acceptor conditions, i.e., nitrate, nitrite and mixtures of nitrate and nitrite, were carried out using activated sludge cultivated in a sequencing batch reactor. The experimental results confirmed no inhibition of the utilization of nitrate or nitrite as an electron acceptor for anoxic phosphorus uptake. Anoxic phosphorus uptake occurred provided there was an electron acceptor present regardless of whether it was nitrate or nitrite. However, for nitrite a relatively small amount of anoxic phosphorus was taken up per nitrogen denitrified compared to nitrate. On the other hand, the amount of anoxic phosphorus taken up per nitrogen denitrified increased with an increase in the initial loading amount of electron acceptor in the case of nitrate, whereas it slightly decreased nitrite. Moreover, the amount of phosphorus taken up per nitrogen denitrified decreased with increasing mixed liquor suspended solid (MLSS) concentration in the case of nitrate, while it slightly increased for nitrite. From these results, it was confirmed that the activity of anoxic phosphorus uptake is strongly associated with the type and the initial loading amount of electron acceptor and the MLSS concentration under anoxic conditions.
- 公益社団法人日本生物工学会の論文
- 2001-11-25
著者
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Tsuneda Satoshi
Department of Life Science and Medical Bioscience, Waseda University
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HIRATA Akira
Department of Medical Biochemistry, Graduate School of Medical Science, Kyushu University
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常田 聡
早稲田大学理工学部生命医科学科
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Tsuneda Satoshi
Department Of Chemical Engineering Waseda University
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AHN JOHWAN
Department of Chemical Engineering, Waseda University
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DAIDOU TOMOTAKA
Department of Chemical Engineering, Waseda University
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Hirata Akira
Department Of Chemical Engineering Waseda University
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Ahn Johwan
Department Of Chemical Engineering Waseda University
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Daidou Tomotaka
Department Of Chemical Engineering Waseda University
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