MBBR+磁混凝+反硝化滤池工艺用于全地下污水厂

Application of MBBR,Magnetic Coagulation and Denitrification Deep Bed Filter Process in an Underground Wastewater Treatment Plant

针对全地下污水处理厂建成后出水标准可能需要进一步提高的技术难题,汕尾市东部水质净化厂采用“MBBR+磁混凝沉淀池+反硝化深床滤池”处理工艺,使出水COD、BOD5、氨氮、总磷指标稳定达到《地表水环境质量标准》(GB 3838—2002)的Ⅳ类标准,总氮、SS指标满足《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准,且通过调整MBBR填料填充比、反硝化深床滤池运行工况,可使出水水质进一步提升。根据进水水质、水量波动的情况,采用精确曝气、智能加药及智慧化管控平台等技术精细化运行,使电耗降低约7.8%、药耗降低约9%,节约了运营成本。

In view of the technical problem that the discharge standard may need to be further improved after the completion of underground wastewater treatment plant,the combined treatment process of MBBR,magnetic coagulation sedimentation tank and denitrification deep bed filter was adopted in the Dongbu wastewater treatment plant in Shanwei City.The COD,BOD5,ammonia nitrogen and total phosphorus in effluent reached the classⅣlimit specified in the Environmental Quality Standards for Surface Water(GB 3838-2002),and the total nitrogen and SS met the first class A limit specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).The effluent quality can be further improved by adjusting the carrier filling ratio of MBBR,modifying the operating conditions of denitrification deep bed filter.Due to the fluctuation of influent quality and quantity,precise aeration,intelligent dosing and intelligent management and control platform were adopted to achieve fine operation,which reduced the power consumption by approximately 7.8%and chemical consumption by approximately 9%,thus saved the operational cost.