A sewage treatment process and sewage treatment system
A sewage treatment and process technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, biological sludge treatment, etc., can solve the problems of increasing sewage treatment costs, lack of carbon sources, and low efficiency.
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Embodiment 1
[0083] Sewage is taken to the living area of Renmin University of China, and the treatment water volume is designed to be Q=4m 3 / d, according to the following steps for sewage treatment:
[0084] Step 1: Sewage is pretreated through grid grit settling to remove grid slag and sand with larger particle size;
[0085] Step 2: The sewage after grid grit treatment enters the anaerobic-aerobic unit, and the volume ratio of the anaerobic tank and the aerobic tank in the anaerobic-aerobic unit is 1:4;
[0086] In the anaerobic-aerobic unit, the sludge age is 3 days, and the hydraulic retention time is 1.5 hours;
[0087] Step 3: The mixed solution in the anaerobic-aerobic unit enters the first sedimentation tank for mud-water separation, the supernatant enters the anoxic tank in the anoxic-aerobic unit, and the activated sludge after settling and concentrating partly flows back to In the anaerobic tank in the anaerobic-aerobic unit, the remaining sludge is discharged into the slu...
Embodiment 2
[0105] Sewage is taken to the living area of Renmin University of China, and the treatment water volume is designed to be Q=4m 3 / d, according to the following steps for sewage treatment:
[0106] Step 1: Sewage is pretreated through grid grit settling to remove grid slag and sand with larger particle size;
[0107] Step 2: The sewage after grid grit treatment enters the anaerobic-aerobic unit, and the volume ratio of the anaerobic tank and the aerobic tank in the anaerobic-aerobic unit is 1:5;
[0108] In the anaerobic-aerobic unit, the sludge age is 0.5d, and the hydraulic retention time is 0.5h;
[0109] Step 3: The mixed solution in the anaerobic-aerobic unit enters the first sedimentation tank for mud-water separation, the supernatant enters the anoxic tank in the anoxic-aerobic unit, and the activated sludge after settling and concentrating partly flows back to In the anaerobic tank in the anaerobic-aerobic unit, the rest is discharged into the sludge hydrolysis dige...
Embodiment 3
[0128] Sewage is taken to the living area of Renmin University of China, and the treatment water volume is designed to be Q=4m 3 / d, according to the following steps for sewage treatment:
[0129] Step 1: Sewage is pretreated through grid grit settling to remove grid slag and sand with larger particle size;
[0130] Step 2: The sewage after grid grit treatment enters the anaerobic-aerobic unit, and the volume ratio of the anaerobic tank and the aerobic tank in the anaerobic-aerobic unit is 1:3;
[0131] In the anaerobic-aerobic unit, the sludge age is 5 days, and the hydraulic retention time is 3 hours;
[0132] Step 3: The mixed solution in the anaerobic-aerobic unit enters the first sedimentation tank for mud-water separation, the supernatant enters the anoxic tank in the anoxic-aerobic unit, and the activated sludge after settling and concentrating partly flows back to In the anaerobic tank in the anaerobic-aerobic unit, the rest is discharged into the sludge hydrolysis...
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