1. project background hehe town sewage plant is located in hehe town, binzhou city, shandong province, with a sewage treatment capacity of 3,000 tons per day. construction unit shandong narui environmental protection technology co., ltd. 2. sewage from the process flow enters the coarse grid from the external pipeline, and enters the fine grid through the lifting pump after first-level screening. after being screened by a fine grid, the sewage enters the cyclone grit sink, and after aeration and sand-water separation, the sewage enters the homogeneous tank. the sewage in the homogenization tank is fully mixed by the push pump and then enters the anaerobic tank, anoxic tank and aerobic tank in sequence, and finally enters the secondary grit tank. the effluent from the secondary sedimentation tank enters the flocculation sedimentation tank, and pac and pam are added to the tank for flocculation
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