为建立城市污水主流厌氧氨氧化脱氮系统并研究其温室气体N₂O排放特征，采用低氧SBBR处理模拟生活污水并获得了94.1%的TN去除率。连续试验及批量试验结果表明，高效脱氮是部分硝化-短程反硝化耦合厌氧氨氧化共同耦合作用结果。典型周期内N₂O排放呈快速上升、波动式快速下降、缓慢消失的规律，其中第75 min N₂O排放速率最高，达6.7 μg/（L·min），推测是由于低氧硝化过程中羟胺氧化作用所致。高通量测序揭示了体系内同时存在着厌氧氨氧化、好氧异养、反硝化、硝化等功能菌属，与系统脱氮和N₂O产生密切相关。

To establish a mainstream anammox denitrification system for municipal wastewater and study its characteristics of N₂O release,a low-oxygen SBBR is used to treat with the simulated domestic wastewater,achieving a 94.1% of total nitrogen removal efficiency.It is found from continuous and batch experiments that efficient nitrogen removal is contributed by the coupling of partial nitrification-shortcut denitrification and anammox.The emission of nitrous oxide in a typical cycle experiences a pattern of rapid rise,sharply fluctuated drop and slow disappearance.The release speed of N₂O reaches the highest,6.7 μg/(L·min) at the 75^th min,which is speculated to be caused by hydroxylamine oxidation during low-oxygen nitrification.High-throughput sequencing test reveals that the co-existence of functional bacteria of anammox,aerobic heterotrophs,denitrifiers,nitrifiers is closely associated with the denitrification and N₂O production of the system.

宋晶晶(1994-),女,硕士研究生,研究方向为污水脱氮温室气体控制,282622547@qq.com