生态处理系统处理村镇污水工程实践

Engineering Practice of Ecological Treatment System for Rural Sewage Treatment

随着对村镇污水处理要求日趋严格,村镇污水处理技术探索的需求也日益迫切。以连云港市云台中学生活污水处理工程为例,介绍一种用于村镇污水的生态处理系统。工程实践表明,生态处理系统可以有效降低污水中的COD、氨氮和总磷浓度,COD去除率≥85%,氨氮去除率≥90%,总磷去除率≥80%,出水COD和氨氮可以达到《地表水环境质量标准》(GB 3838—2002)的Ⅳ类标准,而总磷也可以满足《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。该工程减少污水排放15000 m^(3)/a,减少碳排放13.5 t/a,电费为0.525元/m^(3)。

In view of the increasingly stringent requirement of sewage treatment and urgent need of its technology in villages and towns,this paper introduces the process and technology of ecological treatment system applied in Yuntai Middle School of Lianyungang and studies its operation and treatment effect.Engineering practice shows that the system can effectively reduce the pollutant concentrations of COD,ammonia nitrogen and total phosphorus in sewage with their removal rates of over 85%,90%and 80%respectively.The effluent COD and ammonia nitrogen can meet the levelⅣcriteria of Environmental Quality Standards for Surface Water(GB 3838-2002),meanwhile the effluent TP also can meet the first level A criteria in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).About 15000 m^(3)/a of sewage discharge and 13.5 t/a of carbon emission are reduced per year in this project.The electricity cost is 0.525 yuan/m^(3).