农村生活污水户式分散处理技术应用实例

Application Examples of Household Decentralised Treatment Technology for Rural Domestic Sewage

经现场调查及座谈,梳理了农村生活污水户式分散治理存在的问题。结合农村污水常用技术及受限因素,从处理效果好、运营维护简单方便、运行费用低等方面综合考虑,提出了“化粪池+水解酸化+生物澄清池+两级水平潜流湿地+生态塘”农村生活污水户式分散处理组合工艺,设计并建设了处理规模3 m3/d的农村生活污水户式分散处理系统。地方环境监测站连续7个月监测数据表明,该组合工艺出水COD、NH3-N、TN和TP水质指标优于《河南省农村生活污水处理设施水污染物排放标准》(DB 41/1820-2019)一级标准。

Through field investigation,problems existing in household decentralised treatment for rural domestic sewage were sorted out.Considering the commonly used rural sewage treatment technologies and their limitation factors,a combined process of household decentralised treatment for rural sewage“septic tank+hydrolytic acidification+biological clarifier+two-level horizontal subsurface flow wetland+ecological pond”was put forward whilst considering its effectiveness in treatment,easiness and convenience in operation and maintenance,low cost to run,and etc.A decentralised treatment system for rural household sewage with a capacity of 3m3/d had been designed and constructed.Successive seven-month monitoring data showed that its effluent variables such as COD,ammonia nitrogen,total nitrogen and total phosphorus could be remained below Class 1 limits of those specified in the“Henan Provincial Water Pollutant Discharge Standard for Rural Domestic Sewage Treatment Facilities(DB 41/1820-2019)”.