江南某污水厂A-A^2/O工艺生物脱氮运行过程研究  

Analysis of Nitrogen Removal Efficiency of A-A^2/O Process in Sewage Treatment Plant of Jiangnan

作　　者：李培[1] 潘杨[1] 张同祺[1] 

机构地区：[1]苏州科技学院环境科学与工程学院,江苏苏州215011

出　　处：《环境科技》2010年第5期31-35,共5页Environmental Science and Technology

基　　金："十一五"国家重大科技专项子课题(2008ZX07313-002-02)

摘　　要：污水厂采用A-A2/O工艺,采取对回流污泥预反硝化及分段进水的方法。TN平均去除率为63.2%,出水达标率为57.2%,出水TN不稳定,去除率低,达标率低。好氧池硝化效果好,污泥反硝化池没有发挥其作用,缺氧池反硝化不彻底。建议适当的增加污泥反硝化池进水碳源和停留时间;把好氧池的前段改做缺氧池;适当的降低好氧池曝气量;通过实验调试,确定最佳的硝化液回流量。The wastewater treatment plant applied A-A2/O process and used return sludge pre-denitrification and step feed. TN in the effluent were instable. The average removal efficiency of TN was 63.2% and the rate up to standard was 57.2%, both of them were lower beyond satisfaction. The nitrification were effective in aerobic tank, but the indicating sludge denitrification tank did not play its role and denitrification did not complete in the anaerobic tank. So some improved suggestions were put forward, such as to properly increase the effluent carbon concentration and HRT in sludge denitrification tank, to change the former parter of the aeration pond into an anoxic pond,to properly decrease the aeration volumn in the aeration pond and to confirm the best back flow volumn through experiments.

关 键 词：A—A2/O工艺 运行效果 脱氮问题 硝化 反硝化 脱氮优化 

分 类 号：X7[环境科学与工程—环境工程]