中文关键词分段进水比反硝化除磷脱氮碳源利用率物料平衡低C/N比 英文关键词ratio of step feeddenitrifying phosphorus and nitrate removalutilization of carbon sourcesmaterial balancelow C/N

作者	单位	E-mail
南彦斌	兰州交通大学环境与市政工程学院, 兰州 730070	2474347552@qq.com
彭永臻	北京工业大学城镇污水深度处理与资源化利用技术国家工程实验室, 北京 100124
曾立云	兰州交通大学环境与市政工程学院, 兰州 730070
赵智超	兰州交通大学环境与市政工程学院, 兰州 730070
刘宏	兰州交通大学环境与市政工程学院, 兰州 730070
李慧	兰州交通大学环境与市政工程学院, 兰州 730070
陈永志	兰州交通大学环境与市政工程学院, 兰州 730070	476411589@qq.com

中文摘要 采用改良A²/O-BAF双污泥系统处理低C/N比生活污水，为提高碳源利用率，研究了两段进水（预缺氧段和缺氧段）对反硝化除磷脱氮的影响，同时根据COD的物料衡算公式，分析评价了不同进水比下，碳源的利用情况.结果表明当分段进水比为7：3时，平均进水COD、NH₄⁺-N、TN、TP浓度分别为174.99、58.19、59.10、5.15 mg·L^-1，出水COD、NH₄⁺-N、TN、TP浓度分别为29.48、4.07、14.10、0.44 mg·L^-1，去除率分别为82.12%、92.76%、75.45%、91.20%；系统中反硝化聚磷菌占聚磷菌的比例（DPAOs/PAOs）为98.81%，此时系统反硝化除磷脱氮最佳，同时碳源的有效利用率达85.77%，平衡百分比为92.33%.通过优化分段进水，碳源被有效利用，提高了同步脱氮除磷效率，为改良A²/O-BAF双污泥系统处理低C/N比污水提供理论依据. 英文摘要 A modification of the two sludge A²/O-BAF system was used to treat low C/N real domestic sewage. In order to improve the utilization of the carbon source, the effects of two step feeds (pre-anoxic zone and anoxic zone) on denitrifying phosphorus and nitrate removal were studied. According to the formula of material balance for COD, the utilization of carbon source was analyzed and evaluated under different ratios of step feed, simultaneously. The results showed that when the ratio of step feed was 7:3 and the influent concentrations of COD, NH₄⁺-N, TN, and TP were 174.99, 58.19, 59.10, and 5.15 mg·L^-1, respectively, their effluent concentrations were 29.48, 4.07, 14.10, and 0.40 mg·L^-1, and the removal rates were 82.12%, 92.76%, 75.45%, and 91.20%, respectively. It was found that when the ratio of the denitrifying phosphorus accumulation organisms to the phosphorus accumulation organisms(DPAOs/PAOs) was 98.81%, the efficiencies of denitrifying phosphorus and nitrate removal were optimum. By optimizing step feed, the carbon source was utilized effectively, and the efficiencies of nitrogen and phosphorus removal were improved simultaneously. The theoretical basis has thus been provided for the modification of the two sludge A²/O-BAF system to treat low C/N waste water.

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