| 长期低聚磷条件对AO-SBR系统Accumulibacter代谢特性的影响 |
| 摘要点击 960 全文点击 345 投稿时间：2018-10-16 修订日期：2018-11-29 |
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| 中文关键词 Accumulibacter 聚磷代谢(PAM) 聚糖代谢(GAM) 荧光原位杂交(FISH) 代谢迁移 |
| 英文关键词 Accumulibacter polyphosphate accumulating metabolism (PAM) glycogen accumulating metabolism (GAM) fluorescence in situ hybridization (FISH) metabolic shift |
| 作者 | 单位 | E-mail | | 王少坡 | 天津市水质科学与技术重点实验室, 天津 300384
天津城建大学环境与市政工程学院, 天津 300384 | wspfr@sina.com | | 李柱 | 天津市水质科学与技术重点实验室, 天津 300384
天津城建大学环境与市政工程学院, 天津 300384 | | | 赵乐丹 | 天津市水质科学与技术重点实验室, 天津 300384
天津城建大学环境与市政工程学院, 天津 300384 | | | 于静洁 | 天津市水质科学与技术重点实验室, 天津 300384
天津城建大学环境与市政工程学院, 天津 300384 | | | 赵明 | 哈尔滨工业大学环境学院, 哈尔滨 150001 | | | 郑胜达 | 天津三博水科技有限公司, 天津 300384 | | | 孙力平 | 天津市水质科学与技术重点实验室, 天津 300384
天津城建大学环境与市政工程学院, 天津 300384 | |
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| 中文摘要 |
| 为了考察长期低聚磷（Poly-P）条件下Accumulibacter的菌群结构及其代谢特性的变化，采用两个SBR反应器，分别采用乙酸钠和丙酸钠为有机碳源，接种富含Accumulibacter的活性污泥，在进水PO43--P浓度为2.5 mg·L-1的低磷进水条件下运行60 d，对系统除磷性能、污泥浓度、主要菌群结构的变化进行研究.结果表明，长期低Poly-P条件下两个SBR系统均表现出良好的除磷和去除有机物的性能，但两个系统内的菌群代谢均表现出聚糖菌代谢特征；运行60 d后，丙酸盐系统中Accumulibacter Ⅰ型仍保持了较高的丰度（40%±7%），表明丙酸盐SBR系统中Accumulibacter Ⅰ型不仅具有较高的代谢活性，还能够在长期低聚磷条件下以一种不依赖Poly-P的代谢方式进行生存；对比发现，丙酸盐碳源更有利于Accumulibacter适应低磷负荷的运行环境，且在低磷负荷的运行环境下AccumulibacterⅠ型比Ⅱ型更具竞争优势. |
| 英文摘要 |
| To investigate the changes in microbial community structure and metabolic properties of Accumulibacter under long-term Poly-P deficiency, an activated sludge enriched with Accumulibacter was inoculated into two SBR reactors, where sodium acetate and sodium propionate were used separately as organic carbon sources. The two reactors were operated for 60 days with an influent PO43--P concentration of 2.5 mg·L-1. The phosphorus removal performance, sludge production, and changes in the microbial community structure of the systems were analyzed. The results indicated that both SBR systems showed good performance of phosphorus and organic matter removal. However, microorganisms in both systems showed glycogen-accumulating metabolism properties under long-term Poly-P deficiency. In the unfavorable environment of long-term Poly-P deficiency, Accumulibacter Ⅰ maintained a high abundance (40%±7%) in the propionate SBR system, indicating that Accumulibacter Ⅰ had higher metabolic activity and its metabolic properties could be independent of Poly-P for survival under Poly-P deficiency for a long period. In comparison, propionate is more conducive to Accumulibacter adaptation to lower phosphorus loads, and Accumulibacter Ⅰ is more competitive than Accumulibacter Ⅱ under lower phosphorus loads. |
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