Sequence batch reactors (SBR) with simultaneous feeding/draw mode and low-strength wastewater were used for the cultivation of aerobic granules, and analysis of bacterial community diversity were conducted. Results revealed that the ratio of chemical oxygen demand/total nitrogen removal amount for R1 with real wastewater and R2 with synthetic wastewater decreased from 9.9 to 8.7 and, 29.9 to 21.1, respectively, when volumetric exchange ratio (VER) decreased from 90% (stage I) to 50% (stage II), indicating that organic matter in real and low-strength wastewater was fully utilized with lower VER by denitrifying bacteria. Relative abundances of the genus Dechloromonas, Pseudomonas, Bacillus in R1, which are responsible for denitrifying phosphorus removal, were much higher than that in R2, accounting for the high efficiency of nitrogen and phosphorus removal from real wastewater with low influent C/N ratio of 3.6 on average. These results provide useful information for improving wastewater treatment efficiency in the future.

同时进料/出料方式和低浓度废水的顺序分批反应器（SBR）用于需氧颗粒的培养，并对细菌群落多样性进行了分析。结果表明，当体积交换率（VER）从90％降低时，实际废水中的R1和合成废水中的R2的化学需氧量/总脱氮率分别从9.9降低到8.7，从29.9降低到21.1（阶段） I）至50％（第二阶段），表明通过反硝化细菌可以充分利用低VER的真实和低强度废水中的有机物。绿藻属，假单胞菌属，芽孢杆菌属的相对丰度R1中负责反硝化除磷的比R2中的要高得多，这是因为从真实废水中去除氮和磷的效率很高，而进水C / N比平均仅为3.6。这些结果为将来提高废水处理效率提供了有用的信息。