东太湖岛屿分散型农村生活污水长效治理对策

Long-term Treatment Strategy of Decentralized Rural Domestic Sewage in East Taihu Lake Island

为有效保护太湖水体环境,加强农村生活污水治理,以东太湖某大型岛屿为研究对象,对当地分散型农村生活污水的水质水量特征、管网布置和处理设施运行情况等开展实地调查,并结合生态敏感区保护要求,制订了分散型污水处理设施分级分类管理方案;同时,建议加强农家乐聚集区餐饮类废水的隔油预处理,并在外排太湖和沿岸河流的设施末尾增设人工湿地,以提升其抗冲击和脱氮除磷性能。此外,通过建立区域型智慧水务管理平台,将设施的电耗与进水水质水量动态匹配,可以使运行能耗降低25%以上,长期运行率超过95%。

To effectively protect the water environment of Taihu Lake and strengthen the treatment of rural domestic sewage,a field investigation was carried out in a large island located in East Taihu Lake to investigate the water quality and quantity characteristics of local decentralized rural domestic sewage,collection pipe network layout and operation of treatment facilities.According to the protection requirements of ecological sensitive areas,the partition and classification management scheme of decentralized sewage treatment facilities was developed.It was suggested to strengthen the oil separation pretreatment of catering wastewater in farmhouse tourism regions,and constructed wetlands should be added at the end of the facilities that discharged tail water to Taihu Lake and rivers to improve their impact resistance and nitrogen and phosphorus removal performance.In addition,the energy consumption of the facilities was reduced by more than 25%and the long-term operation rate exceeded 95%by establishing an intelligent regional water management platform and dynamically matching the unit power consumption of the facilities with the influent quality and quantity.