| 分段进水对改良A2/O-BAF双污泥系统反硝化除磷脱氮的影响 |
| 摘要点击 2322 全文点击 747 投稿时间：2017-09-28 修订日期：2017-10-18 |
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| 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 feed denitrifying phosphorus and nitrate removal utilization of carbon sources material balance low C/N |
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| 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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