| Positive role of nitrite as electron acceptor on anoxic denitrifying phosphorus removal process |
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| 作者姓名： | HUANG RongXin LI Dong LI XiangKun BAO LinLin JIANG AnXi ZHANG Jie |
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| 作者单位： | [1]School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China [2]School of Architecture and Civil Engineering,Beijing Univerity of Technology, Beijing 100022, China |
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| 基金项目： | Supported by the Science and Technology Project of Heilongjiang Province （Grant No. GA01 C201-03 ） |
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| 摘 要： | Literatures revealed that the electron acceptor-nitrite could be inhibitory or toxic in the denitrifying phosphorus removal process. Batch test experiments were used to investigate the inhibitory effect during the anoxic condition. The inoculated activated sludge was taken from a continuous double-sludge denitrifying phosphorus and nitrogen removal system. Nitrite was added at the anoxic stage. One time injection and sequencing batch injection were carried on in the denitrifying dephosphorus procedure. The results indicated that the nitrite concentration higher than 30 mg/L would inhibit the anoxic phosphate uptake severely,and the threshold inhibitory concentration was dependent on the characteristics of the activated sludge and the operating conditions; instead,lower than the inhibitory concentration would not be detrimental to anoxic phosphorus uptake,and it could act as good electron acceptor for the anoxic phosphate accumulated. Positive effects performed during the denitrifying biological dephosphorus all the time. The utility of nitrite as good electron acceptor would provide a new feasible way in the denitrifying phosphorus process.
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| 关 键 词： | 脱氮除磷细菌 亚硝酸盐 电子接收体 抑制浓度 废水处理 |
| 收稿时间： | 24 October 2006 |
| 修稿时间： | 2006-12-24 |
Positive role of nitrite as electron acceptor on anoxic denitrifying phosphorus removal process |
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| HUANG RongXin LI Dong LI XiangKun BAO LinLin JIANG AnXi ZHANG Jie.Positive role of nitrite as electron acceptor on anoxic denitrifying phosphorus removal process[J].Chinese Science Bulletin,2007,52(16):2179-2183. |
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| Authors: | Huang RongXin Li Dong Li XiangKun Bao LinLin Jiang AnXi Zhang Jie |
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| Institution: | (1) School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China;(2) School of Architecture and Civil Engineering, Beijing University of Technology, Beijing, 100022, China |
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| Abstract: | Literatures revealed that the electron acceptor-nitrite could be inhibitory or toxic in the denitrifying phosphorus removal process. Batch test experiments were used to investigate the inhibitory effect during the anoxic condition. The inoculated activated sludge was taken from a continuous double-sludge denitrifying phosphorus and nitrogen removal system. Nitrite was added at the anoxic stage. One time injection and sequencing batch injection were carried on in the denitrifying dephosphorus procedure. The results indicated that the nitrite concentration higher than 30 mg/L would inhibit the anoxic phosphate uptake severely,and the threshold inhibitory concentration was dependent on the characteristics of the activated sludge and the operating conditions; instead,lower than the inhibitory concentration would not be detrimental to anoxic phosphorus uptake,and it could act as good electron acceptor for the anoxic phosphate accumulated. Positive effects performed during the denitrifying biological dephosphorus all the time. The utility of nitrite as good electron acceptor would provide a new feasible way in the denitrifying phosphorus process. |
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| Keywords: | denitrifying phosphorus removal bacteria nitrite electron acceptor inhibitory concentration |
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