江南某小城镇污水处理工程实例

Engineering Case of Sewage Treatment Project in a Small Town in South of Yangtze River

江南某小城镇污水处理厂采用预处理/初沉消化池/(A/O)生化池/液氯消毒工艺,出水COD≤50 mg/L、BOD_5≤10 mg/L、SS≤10 mg/L、TP≤0.5 mg/L,达到了《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。运行表明,该工艺具有基建投资省、运行费用低、操作管理方便、处理效果稳定的特点。

The combined process of pretreatment, primary sedimentation digestion tank, A/O bio- chemical tank and chlorine disinfection is used in the sewage treatment plant in a small town in South of Yangtze River. The concentrations of COD, BOD5, SS and TP in the effluent were equal to or less than 50 rag/L, 10 rag/L, 10 mg/L and 0.5 mg/L respectively, meeting the first class A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918 -2002）. The combined process has the characteristics of low investment and operation cost, simple operation and management, and stable treatment effect.