沙湖污水处理厂低温脱氮问题诊断与优化  

Problem Diagnosis and Optimization for Nitrogen Removal at Low Temperature in Shahu WWTP

作　　者：张雷[1,2] 李明[1,3] 汪恂 

机构地区：[1]武汉科技大学城市建设学院,湖北武汉430070 [2]武汉市水务集团有限公司,湖北武汉430077 [3]湖北省城市规划设计研究院,湖北武汉430071

出　　处：《中国给水排水》2014年第23期65-68,共4页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51272189)

摘　　要：针对武汉市沙湖污水处理厂A^2／O工艺在低温条件下脱氮效果不佳的问题，分析其原因并做出相应调整，提出了优化方案。在冬季低温时通过将污泥浓度提高到3500mg／L、内回流比上调为180％、曝气池DO提高至4．5～5．5mg／L等措施，可强化A^2／O工艺在低温条件下的脱氮效率，平均出水NH3-N、TN浓度分别为4．9、12．5mg／L，出水水质优于《城镇污水处理厂污染物排放标准》（GB18918-2002）的一级B标准。The reasons for low nitrogen removal efficiency of the A^2/O process at low temperature in Shahu WWTP were analyzed, the corresponding adjustments were made, and the optimized scheme was proposed. At low temperature in winter, the nitrogen removal efficiency of the A^2/O process could be improved by increasing the sludge concentration to 3 500 mg/L, the reflux ratio to 180% and the DO in the aeration tank to 4.5 - 5.5 mg/L. The average effluent concentrations of NH3 - N and TN were 4.9 mg/L and 12.5 mg/L respectively. The effluent quality was superior to the first level B criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918 -2002）.

关 键 词：沙湖污水处理厂 A^2/O工艺 脱氮 低温 运行优化 

分 类 号：X703[环境科学与工程—环境工程]