农村分散式生活污水处理终端治理效果研究

Study on the Treatment Effect of Rural Decentralized Domestic Sewage Treatment Terminal

针对农村分散式生活污水产生和排放的特点,生活污水处理终端采用无动力处理设施,具体工艺为调节池——厌氧池——沉淀池——人工湿地。研究结果表明:无动力处理设施运行成本极低,对水质水量适应性较好,出水pH值稳定,且对水体中的COD、NH 3-N、TP和SS去除效率较高。连续10个月监测结果显示,当水量为60 t/d时,COD、NH 3-N、TP和SS平均去除效率为63.56%,63.24%,63.80%,73.15%;当水量为90 t/d时,COD、NH 3-N、TP和SS平均去除效率为63.05%,68.54%,66.09%,73.14%;当水量为110 t/d时,COD、NH 3-N、TP和SS平均去除效率为62.23%,60.60%,60.91%,70.96%。经处理后出水均能达到《农村生活污水处理设施水污染物排放标准》一级标准。

According to the characteristics of the generation and discharge of distributed domestic sewage in rural areas,the domestic sewage treatment terminal adopts non-power treatment facilities,and the specific technology is regulating tank——anaerobic tank——sedimentation tank——artificial wetland.The research results show that the non-power treatment facility has low operating cost,good adaptability to water quality and quantity,stable effluent pH,and high removal efficiency for COD,NH 3-N,TP and SS in water.The monitoring results for 10 months show that when the water volume is 60t/d,the average removal efficiency of COD,NH 3-N,TP and SS is 63.56%,63.24%,63.80%and 73.15%.When the water volume is 90t/d,the average removal efficiencies of COD,NH 3-N,TP and SS are 63.05%,68.54%,66.09%and 73.14%.When the water volume is 110t/d,the average removal efficiencies of COD,NH 3-N,TP and SS are 62.23%,60.60%,60.91%and 70.96%.After treatment,the effluent can meet the first-level standard of"Discharge Standard for Water Pollutants of Rural Domestic Sewage Treatment Facilities".