磁混凝分离与BAF组合工艺在溢流污水治理中的应用

Application of magnetic coagulation separation&biological aerated filter combined process in overflow wastewater treatment

采用超磁分离+曝气生物滤池(BAF)及磁混凝沉淀+曝气生物滤池的组合工艺对城市溢流生活污水进行处理,工程处理规模分别为20000 m3/d,出水主要水质指标均能达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准(除TN外)。磁混凝分离+BAF组合工艺处理效果好、占地小、施工周期短,均能满足项目要求。对比分析2种组合工艺的处理效果与技术经济性指标,磁混凝沉淀+BAF的组合工艺处理效果更优,运行费用及滤池维护频率更低。

A combination of super magnetic separation+Biological Aerated Filter(BAF)and magnetic coagulation sedimentation+BAF processes was used to treat urban overflow domestic sewage,with a treatment capacity of 20,000 m3/d.The primary water quality indicators of the effluent reached Class A of the“Discharge Standard of Pollutants for Municipal Wastewater Treatment Plants”(GB 18918—2002),except for TN.The magnetic coagulation sedimentation+BAF process demonstrated effective treatment,compact land use,and short construction time,meeting project requirements.Comparative analysis of the treatment efficiency and techno-economic indicators of the two combinations showed that the magnetic coagulation sedimentation+BAF process had superior treatment performance,lower operating costs,and reduced maintenance frequency of the filter.