【摘要】 以华北寒冷地区某典型城镇污水处理厂CASS工艺为研究对象，对污水处理厂不同季节活性污泥样品进行微生物分析，考察不同季节活性污泥的群落结构变化，探究脱氮效果与氮转化功能基因赋存的相关性。结果显示，秋冬季节，Bacteroidetes相对丰度上升至31.45%和30.47%,冬季CASS池内Methylotenera(12.94%)、Zoogloea(8.74%)、Dechloromonas(2.15%)、Arcobacter(7.43%)、Thauera(2.11%)、Pseudomonas(0.43%)共占已知微生物菌属的33.80%。由微生物结果可以看出，春夏季节过渡到秋季稳定运行，冬季时期系统内反硝化细菌均有大幅增加。本研究对生物脱氮系统中的菌群结构和多样性做了系统分析，可为优化寒冷地区城镇污水处理厂脱氮效果提供理论基础。更多还原

【Abstract】 Taking the CASS process of a typical urban sewage treatment plant in the cold region of North China as an example, the microbial analysis of the activated sludge samples was carried out to investigate the community structure changes of activated sludge in different seasons, and to explore the correlation between nitrogen removal efficiency and nitrogen transfer function genes. The results showed that the relative abundance of Bacteroidetes increased to 31.45% and 30.47% in autumn and winter. In winter, Methylotenera(12.94%), Zoogloea(8.74%), Dechloromonas(2.15%), Arcobacter(7.43%), Thauera(2.11%) and Pseudomonas(0.43%) occupied the CASS pool 33.80% of the known microbial genera. It can be seen from the microbial results that the system operated stably from spring and summer to autumn, and the denitrifying bacteria increased significantly in winter. This study systematically analyzed the structure and diversity of microbial community in the biological nitrogen removal system, which can provide a theoretical basis for optimizing the nitrogen removal effect of urban sewage plants in cold areas.更多还原