Feasibility Research And Design Of The Shuangqing Sewage Treatment Plant In Beichen District Tianjin

The project of Tianjin Beichen district Shuangqing sewage treatment plantcomprises sewage pretreatment，biological treatment，advanced treatment，sludgetreatment and odor treatment.According to the comprehensive water index method and the water consumptionof different land usage properties index method. The total scale of this project is about150000m3/day. It is estimated that the scale of first stage is40000m3/day and secondstage is110000m3/day in further.The project is located in Shuangkou town which is northeast corner of theintersection of Beichen Road and WeiHe River. The sewage treatment process of thisproject is the process route of separate quality inflow and pretreatment process. Thedomestic sewage pretreatment adoptcoarse and fine screen+aerated grit chamber"; theindustrial wastewater pretreatment apopts"coarse and fine screen+aerated grit chamber+water quality regulating reservoir+hydrolysis acidification pond".The biochemical treatment adopts "the improved AAO process with reflux sludgedenitrification+the secondary sedimentation tank from the peripHery". The advancedprocessing part adopts"mechanical coagulation+inclined plate sedimentation+fiberrotary filter". The disinfection adopts the process of chlorine dioxide disinfection. Thesludge treatment adopts belt type concentrating dehydration all-in-one machine. Thedeodorant adopts biofilter deodorization process.Shuangqing sewage treatment plant project will be benefit for the infrastructurelevel of Tianjin development；solving the problem of the sewage discharge of Beicangdrainage system；improving and raise the level of environmental quality. It is beneficialto improve the investment environment，to attract foreign capital and play a positiverole for sustained economic steady development in Tianjin.