Abstract：To reduce and control of N2O production during wastewater treatment plant, both long-term and batch tests were carried out to investigate main source and pathway of N2O production during nitrogen removal via nitrite from real domestic wastewater in SBR. N2O was produced during nitrogen removal via nitrite from domestic wastewater. N2O was mainly produced during nitritition; whereas, heterotrophic denitrifiers did almost not produced N2O. Furthermore, anoxic denitrification might have the potential of reducing N2O production. During nitritition, N2O production increased obviously with the increase of the influent ammonia concentration. DO concentration also significantly influenced N2O production during nitritition. N2O production were very low when DO concentration were controlled higher than 2mg/L or lower than 0.5mg/L. DO concentration lower than 0.5mg/L reduced N2O stripping of aeration and prolonged the N2O retention time in the activated sludge. Moreover, N2O reduction was enhanced under the DO concentrations lower than 0.5mg/L due to denitrification can be accrued in the anoxic zone of the activated sludge floc.
刘秀红, 鞠然, 刘立超, 杨庆, 甘一萍, 常江, 彭永臻. 生活污水短程生物脱氮过程中N2O的产生与控制方法[J]. 中国环境科学, 2011, 31(增刊): 30-34.
LIU Xiu-Hong, JU Ran, LIU Li-Chao, YANG Qing, GAN Yi-Ping, CHANG Jiang, PENG Yong-Zhen. N2O sources and control methods during nitrogen removal from domestic wastewater. CHINA ENVIRONMENTAL SCIENCECE, 2011, 31(增刊): 30-34.
