抑制二沉池出水复氧的技术改造实践  

Technical Transformation Practice of Inhibiting Reoxygenation of Effluent from Secondary Sedimentation Tank

作　　者：于益群 王庆 卢仙林 陈辰 刘国文 YU Yiqun;WANG Qing;LU Xianlin;CHEN Chen;LIU Guowen(Tianjin TEDA Water Industry Co.,Ltd.,Tianjin 300457,China;Tianjin TEDA New Water Technology Development Co.,Ltd.,Tianjin 300457,China)

机构地区：[1]天津泰达水业有限公司,天津300457 [2]天津泰达新水源科技开发有限公司,天津300457

出　　处：《天津科技》2021年第7期102-104,共3页Tianjin Science & Technology

摘　　要：传统二沉池的构造易于使其出水受到跌水复氧现象影响而导致溶解氧升高。在仅依靠A2O工艺不能满足脱氮需求的情况下,跌水复氧现象使得A2O后续连接反硝化滤池的运行成本大幅上升。通过对二沉池出水口进行改造,抑制跌水复氧现象的发生,使得溶解氧年度平均值从9.19 mg/L下降至3.48 mg/L,后续连接的反硝化滤池碳源消耗量节约了30%~60%。改造方式也为后续研究及二沉池设计提供了参考。The structure of the traditional secondary sedimentation tank is likely to cause the effluent to be affected by the phenomenon of waterfall reoxygenation,which leads to an increase in dissolved oxygen.In the case that the A2O process alone cannot meet the demand for denitrification,the phenomenon of waterfall reoxygenation greatly increases the operating cost of the subsequent denitrification filter of A2O process.By transforming the outlet of the secondary sedimentation tank,the phenomenon of waterfall reoxygenation is inhibited.The annual average value of dissolved oxygen decreases from 9.19 mg/L to 3.48 mg/L,and the carbon source consumption of the subsequent denitrification filter is saved by 30%to 60%.The transformation method also provides a reference for subsequent research and the design of the secondary sedimentation tank.

关 键 词：二沉池 反硝化生物滤池 溶解氧 跌水复氧 

分 类 号：X703.1[环境科学与工程—环境工程]