Sequential flow return type sewage treatment method and its treatment device
A sewage treatment method and sewage treatment device technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of affecting microbial metabolic intensity, weakening of microbial degradation function, and degradation Weakening and other problems, to achieve the effect of efficient operation of water, efficient degradation of organic matter, and improved biodegradability
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[0020] In the sewage treatment process of the present invention, taking the treatment of domestic sewage including black water and gray water as an example, on the treatment process path of the domestic sewage, an anaerobic cabinet 2, a contact oxidation cabinet 4, and an electrocoagulation sedimentation cabinet are sequentially arranged 13 and film cabinet 20. First, the sewage is transported to the anaerobic tank 2 for anaerobic biological treatment. After the anaerobic biological treatment, the sewage in the anaerobic tank 2 enters the contact oxidation tank 4 for aeration and oxygenation. The aeration and oxygenation time is T1 =50-70 minutes, then stop the aeration time T2=8-12 minutes, so that the sewage in the contact oxidation cabinet is precipitated and separated, and the supernatant in the contact oxidation cabinet after precipitation is transported to the electrocoagulation sedimentation cabinet 13, and the electrocoagulation The electrode materials of the positive ...
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