曝气生物滤池工艺用于污水厂准Ⅳ类出水提标

Application of Biological Aerated Filter Process in Wastewater Treatment Plant with Effluent of Quasi-ⅣWater Standard

温岭市观岙污水处理厂现状规模已达14万m^(3)/d,主体采用A/A/O工艺+高密度沉淀池+高效纤维滤池,出水水质执行一级A排放标准。提标改造工程将出水水质提高到地表水准Ⅳ类水质。针对该厂TN、TP出水保障率较低的特点,改造工程注重对脱氮除磷功能的强化,即深度处理系统增加曝气生物滤池(BAF)。项目改造后运行稳定良好,出水水质全面优于准Ⅳ类水质标准。

The current treatment scale of Wenling Guanao WWTP is 140 000m^(3)/d.The combination process of A/A/O+high density sedimentation tank+high efficiency fiber filter process is applied.The effluent quality is required as the first class A discharge standard.The up-to-standard reconstruction project will improve the effluent quality to the surface water with Quasi-IV water standard.Aiming at the characteristics of low guarantee rate of TN and TP effluent,the reconstruction project focuses on the improvement of nitrogen and phosphorus removal functions,that is to add the biological aerated filter(BAF)in the advanced treatment system.After the reconstruction of the project,the operation is stable,and the effluent quality is better than the Quasi-Ⅳwater quality standard.