In order to meet first-level standard in"Part 4 of Water Pollution Comprehensive Emissions Part 4:Haihe Basin"(DB 37/3416.4-2018)for an industrial park wastewater treatment plant in Bingzhou,the combined process of hydrolytic acidification,primary sedimentation tank,modified Bardenpho,Fenton flocculation sedimentation tank,sand filter,ozone contact oxidation,Activated carbon filter and contact disinfection was used.Among them,the sewage treatment plant(second phase)has been put into operation,the hydraulic retention time of modified Bardenpho is 37.54 h,the reflux ratio in the mixed liquid is 200%to 300%,using an increased aeration method.The surface load of the secondary sedimentation tank is 0.64 m3/(m2·h).Fenton's reaction time is 90min.And the surface load of the high-efficiency sedimentation tank is 3.43 m3/(m2·h).The residence time of ozone contact tank is 60 min with dosaging of 60 kg/h.The residence time of contact disinfection is 30 min.The actual effluent quality meets the design requirement.
维普
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