A sewage treatment process
A sewage treatment and process technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of increasing sewage treatment costs, lack of carbon sources, low efficiency, etc.
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Embodiment 1
[0084] 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:
[0085] Step 1: Sewage is preliminarily treated through grid grit settling to remove suspended solids with larger particle sizes, and the grid gap is 16-25mm;
[0086] Step 2: The sewage after grid grit treatment enters the anaerobic-aerobic unit, and the volume ratio of anaerobic and aerobic units in the anaerobic-aerobic unit is 1:4; the sludge age in the anaerobic-aerobic unit The water retention time is 3d, and the hydraulic retention time is 1.5h; the dissolved oxygen in the anaerobic tank is controlled below 0.2mg / L, and the dissolved oxygen in the aerobic tank is controlled at about 2mg / L;
[0087] Step 3: The mixed solution in the anaerobic-aerobic unit enters the first sedimentation tank for mud-water separation, the supernatant enters the anaerobic ammonium oxidation reactor, an...
Embodiment 2
[0101] 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:
[0102] Step 1: Sewage is preliminarily treated through grid grit settling to remove suspended solids with larger particle sizes, and the grid gap is 16-25mm;
[0103] Step 2: The sewage after grid grit treatment enters the anaerobic-aerobic unit, and the volume ratio of anaerobic and aerobic units in the anaerobic-aerobic unit is 1:3; the sludge age in the anaerobic-aerobic unit is 0.5d, and the hydraulic retention time is 3h; the dissolved oxygen in the anaerobic tank is controlled below 0.2mg / L, and the dissolved oxygen in the aerobic tank is controlled at about 2mg / L;
[0104] Step 3: The mixed solution in the anaerobic-aerobic unit enters the first sedimentation tank for mud-water separation, the supernatant enters the anaerobic ammonium oxidation reactor, and part of the activated s...
Embodiment 3
[0119] 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:
[0120] Step 1: Sewage is preliminarily treated through grid grit settling to remove suspended solids with larger particle sizes, and the grid gap is 16-25mm;
[0121] Step 2: The sewage after grid grit treatment enters the anaerobic-aerobic unit, and the volume ratio of anaerobic and aerobic units in the anaerobic-aerobic unit is 1:5; the sludge age in the anaerobic-aerobic unit 5d, hydraulic retention time is 0.5h; the dissolved oxygen in the anaerobic tank is controlled below 0.2mg / L, and the dissolved oxygen in the aerobic tank is controlled at about 2mg / L;
[0122] Step 3: The mixed solution in the anaerobic-aerobic unit enters the first sedimentation tank for mud-water separation, the supernatant enters the anaerobic ammonium oxidation reactor, and part of the activated sludge after...
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