多种物化生化组合工艺处理印染电镀混合废水

Treatment for Printing and Dyeing-Electroplating Mixed Wastewater by a Variety of Physicochemical and Biochemical Combined Processes

通过“混凝+预处理曝气+预处理沉淀+A^(2)/O生化法+物化”组合工艺对污水处理厂废水进行处理,对COD、TP、TN、NH3-N等测定数据进行分析,评价污水处理厂运行效果。结果表明:COD、TP、TN、NH_(3)^(-)N的平均去除率分别为97%、96%、70%、97%,出水各项指标的平均值分别为:COD浓度为46 mg/L、TP浓度为0.06 mg/L、TN浓度为8 mg/L、NH_(3)^(-)N浓度为0.6 mg/L,出水满足《城镇污水处理厂污染物排放标准》(GB 18918-2002)中的一级A标准要求,在进水浓度低于设计值的情况下,出水污染物浓度不易受进水量增加的影响。

The combined process of"coagulation+pretreatment aeration+pretreatment sedimentation+A^(2)/O Biochemical Method+physicochemical"was used to treat wastewater from wastewater treatment plant.The determination data of COD,TP,TN and NH_(3)-N were analyzed to evaluate the operation effect of wastewater treatment plant.The results showed that the average removal rates of COD,TP,TN and NH_(3)-N were 97%,96%,70%and 97%,respectively.The average values of effluent indexes were as follows:COD concentration was 46 mg/L,TP concentration was 0.06 mg/L,TN concentration was 8 mg/L,and NH_(3)-N concentration was 0.6 mg/L.The effluent meets the requirements of class A standard in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).When the influent concentration was lower than the design value,the effluent pollutant concentration was not easily affected by the increase of inflow.