摘要
结合安庆城东污水厂的实际运行情况,对A-A2/O工艺处理低浓度城市污水的效果进行了分析和研究。结果表明,A-A2/O工艺对COD、氨氮的去除效果好,对TP的去除效果与排泥有关,反硝化效果差会增加出水TP浓度。预缺氧选择池的设置使厌氧池中几乎不发生脱氮,而在传统A2/O工艺中有50的氮是通过厌氧池脱除的。分格曝气池的第1格已具备较好的推流流态,3池中的活性污泥浓度呈上升趋势,而污泥的SOUR递减。提高活性污泥浓度,并不能作为提高对COD、氨氮去除效果的措施,相反会导致除磷效果变差。
Based on the operation situation of Anqing Chengdong WWTP, the performance of A- A^2/O process for treatment of low-strength municipal wastewater was studied. The results show that the removal efficiencies of COD and NH3 - N are good, the TP removal is correlated with the sludge discharge, and the inefficient denitrification may result in increase of effluent TP. The denitrification does not occur in the anaerobic tank due to pre-anoxie selector while 50% of nitrogen is removed by the anaerobic tank in the conventional A^2/O process. The first cell of aeration tank has good plug flow, MISS concentration is increased and SOUR of activated sludge is decreased. Increasing MISS concentration cannot improve the removal efficiencies of COD and ammonia nitrogen, on the contrary, it can result in poor phosphorus removal efficiency.
出处
《中国给水排水》
CAS
CSCD
北大核心
2008年第23期16-19,共4页
China Water & Wastewater
关键词
A—A^2/O工艺
低浓度城市污水
分格曝气池
污泥浓度
污水处理
A-A^2/O process
MISS concentration low-strength municipal wastewater
serial aeration tank
MLSS concentration
