以农田灌溉为目的的城市污水处理工艺研究

Research on Municipal Wastewater Treatment Process for Farmland Irrigation

[目的]通过试验研究开发以农田灌溉为目的的城市污水处理工艺。[方法]采用高负荷活性污泥法处理城市污水,以满足《农田灌溉水质标准》的要求。[结果]高负荷活性污泥法不设初次沉淀池,负荷高,泥龄短,污泥沉降性能良好,不存在污泥膨胀,对有机物的去除以絮凝、吸附、沉淀作用为主,CODCr、BOD5、SS、氮、磷等出水水质指标均可满足《农田灌溉水质标准》的要求。[结论]高负荷活性污泥法可作为污水资源化利用-回用于农田灌溉的处理工艺。

[Objective] The study aimed to develop municipal wastewater treatment process for farmland irrigation.[Method] The high-load activated sludge process was studied to treat municipal wastewater and the effluent must meet the demand of Standards for Irrigation Water Quality.[Result] The high-load activated sludge process has such merits as no primary sedimentation basin,high load,low resident time,good sludge-settlement ability,no sludge swell.The mechanism of the process removing the pollutant is mainly flocculation,adsorption and precipitation.CODCr,BOD5,SS,nitrogen,phosphorus and other water quality indicators meet the demand of Standards for Irrigation Water Quality.[Conclusion] The high-load activated sludge process can be used as the sewage resource utilization process for farmland irrigation.