摘要
A2/O工艺是一种广泛使用的生物脱氮工艺,但在城市污水有机物浓度偏低的情况下,其存在反硝化碳源不足、全程硝化反硝化能耗高以及脱氮效果不稳定的问题,而控制溶解氧是解决上述问题的关键措施。为了研究溶解氧控制措施对A2/O工艺处理效果的影响,优化工艺运行,在成都航空港污水处理厂进行工程调试,并对溶解氧水平与风机能耗之间的关系进行定量分析。结果表明,A2/O工艺的好氧区采取低溶解氧策略(1.6 mg/L)能够改善脱氮效果,并能够保证其他主要污染物达标排放;同时,采用低溶解氧措施也有利于节能降耗,好氧区中点的DO为1.6mg/L较DO为2.0 mg/L时的风机能耗降低约8%。
A^2/O process is a biological nitrogen removal process widely used in municipal sewage treatment. However, there are problems with the process including insufficient denitrification carbon source caused by low organic concentration in the influent, high energy consumption for full nitrification and denitrification, and unstable nitrogen removal. DO control is the key measure to solve these problems. To study the influence of DO control on A^2/O process treatment efficiency and to optimize A^2/O process operation, the engineering commissioning was carried out at the Chengdu Aviation Port Sewage Treatment Plant. The relationship between DO and blower energy consumption was quantitatively analyzed. The results showed that the low DO level strategy （ 1.6 mg/L） could improve the nitrogen removal efficiency and guarantee that the other main pollutants met the national standard. The blower energy con- sumption at DO of 1.6 mg/L was 8% less than that at DO of 2.0 mg/L.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第19期89-91,共3页
China Water & Wastewater
关键词
城市污水处理
A^2
O工艺
脱氮
溶解氧控制
municipal sewage treatment
A^2／O process
nitrogen removal
dissolved oxygen control
