传统推流式曝气池对印染废水氨氮去除效果的研究  

Performance of Traditional Plug Flow Aeration Tank on Ammonia Nitrogen Removal from Printing and Dyeing Wastewater

作　　者：奚晓东 XI Xiao-dong(Shaoxing Sewage Treatment Development Co. Ltd., Shaoxing 312073, China)

机构地区：[1]绍兴水处理发展有限公司,浙江绍兴312073

出　　处：《中国给水排水》2017年第4期63-66,共4页China Water & Wastewater

摘　　要：浙江省某污水处理厂处理以印染废水为主的工业废水及少量生活污水,其一期工程设计处理能力为30×10~4m^3/d,好氧处理采用传统推流式曝气池,2010年出水氨氮在20 mg/L左右,从2011年起每年10月至次年5月出水氨氮季节性升高至40~50 mg/L。通过分析认为,除水温影响外,推流式曝气池前半池供风供氧是影响氨氮生物降解效果的关键因素。通过增设内回流系统,将推流式曝气池改为半混合式曝气池,提高了氨氮降解效果及其稳定性。The mixture of printing-dyeing wastewater and less proportion of domestic sewage was treated in a wastewater treatment plant （WWTP） in Zhejiang Province. The WWTP employed the tradi- tional plug flow aeration tank with capacity of 30 ×10^4m^3/d. The effluent ammonia nitrogen concentra- tion remained a relatively low level around 20 mg/L during 2010, while it increased to 40 -50 mg/L from October to May since 2011. The fluctuation of effluent ammonia nitrogen content was due to seasonal changing （ mainly temperature）. But it is believed that the key factor responsible for ammonia nitrogen removal was oxygen supply level in the inlet part of the aeration tank. In this study, has been demonstrated that ammonia nitrogen removal could be improved via some modifications of aeration tank by adopting the internal reflux pipelines, thus changing the tank from plug flow to semi-mixed tank.

关 键 词：印染废水 推流式曝气池 氨氮降解 

分 类 号：X791[环境科学与工程—环境工程]