摘要
针对重庆市鸡冠石污水处理厂的倒置A2/O工艺在低温条件下处理低碳源污水时脱氮效果不稳定的问题进行了生产性试验研究。在低温时有针对性地采取了提高污泥浓度到5 500～6 000 mg/L、控制曝气池的DO在1.2 mg/L左右等措施,使出水TN稳定在15.5 mg/L左右,对TN的去除率达到62%左右,与前两年的低温脱氮效率相比提高了8%,实现了出水TN的稳定达标排放。同时通过优化对二沉池的运行管理,确保了刮泥机的正常工作与出水SS的达标。
A full scale experiment was conducted to study the unstable nitrogen removal efficiency from low-carbon and low-temperature wastewater by the reversed A2/O process in Chongqing Jiguanshi WWTP. At low temperature, the sludge concentration is increased to 5 500 - 6 000 nag/L, and DO in the aeration tank is controlled at about 1.2 mg/L. After these measures, the effluent TN is stable at about 15.5 mg/L, and the TN removal rate reaches about 62% , a 8% improvement from two years ago. The up-to-standard discharge of the effluent is achieved. At the same time, the operation of the secondary sedimentation tank is optimized to ensure that the mud scraper works normally and the effluent SS reaches the standard.
出处
《中国给水排水》
CAS
CSCD
北大核心
2010年第1期6-8,12,共4页
China Water & Wastewater
基金
水体污染控制与治理科技重大专项(2009ZX07315-002-01)
关键词
倒置A2/O工艺
低温
低碳源
高污泥浓度
脱氮
reversed A2／O process
low temperature
low carbon source
high sludge concentration
nitrogen removal
