A low-energy domestic sewage treatment system
A domestic sewage and treatment system technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of high energy consumption, large surplus sludge production, etc., and achieve removal efficiency High, good removal efficiency, good removal effect
Active Publication Date: 2021-12-10
DONGHUA UNIV
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Problems solved by technology
[0004] The technical problems to be solved by the present invention are: the existing domestic sewage treatment system has high energy consumption, excessive sludge production and other technical problems
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[0025] Such as figure 1 As shown, it is a kind of low-energy domestic sewage treatment system provided by the present invention (wherein, the solid line is the sewage pipe, the dotted line is the dosing pipe, the dotted line is the sludge pipe, the dotted line is the biogas pipe, and the three dots and one dashed line is an air pipe), the process is divided into a first-level pretreatment part, a second-level biochemical treatment part and a third-level advanced treatment part;
[0026] The primary treatment part includes a grid well 1 and a regulating tank 2, wherein the outlet pipe of the grid well 1 is connected with the water inlet pipe of the regulating tank 2.
[0027] The secondary treatment part includes a new enhanced external circulation anaerobic reactor 3, a water distribution well 7, a sedimentation tank 8, and a sludge dewatering machine room 18. The water outlet pipe of the enhanced circulation anaerobic reactor 3 is connected with the water distribution well 7...
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Abstract
The invention discloses a low-energy domestic sewage treatment system, which is characterized in that it includes a first-level pretreatment part, a second-level biochemical treatment part and a third-level advanced treatment part connected in sequence through a sewage pipe; the first-level pretreatment part includes grid well and regulating tank; the secondary biochemical treatment part includes an enhanced external circulation anaerobic reactor, a water distribution well, a sedimentation tank and a sludge dewatering pump room; the tertiary treatment part includes a second-stage tower biofilter, Dephosphorization reaction sedimentation tank, disinfection tank and filtration device. The invention has the advantages of high and stable treatment efficiency of domestic sewage, low energy consumption, less sludge production, and small system occupation area, and is suitable for standard treatment and advanced treatment of domestic sewage in large, medium and small towns.
Description
technical field [0001] The invention relates to a low-energy domestic sewage treatment system, which belongs to the field of sewage biological treatment. Background technique [0002] The main components of domestic sewage include sucrose, protein, starch, oil, etc., and the content of nitrogen and phosphorus in sewage is relatively high. Generally speaking, its COD is 300-500mg / L, NH 3 -N is 30-40mg / L, TP is 3-5mg / L, and the pH value is about 7. Nitrogen and phosphorus elements are one of the main reasons for the harmfulness of domestic sewage. On the one hand, high-content nitrogen and phosphorus sewage may cause eutrophication of water bodies; Health hazards are enormous. [0003] At present, the commonly used biological treatment processes for urban domestic sewage include A2 / O, oxidation ditch, SBR and various improved processes. While the above-mentioned process realizes the purification of sewage water quality, it also has problems of high energy consumption, larg...
Claims
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IPC IPC(8): C02F9/14C02F101/10C02F101/30
Inventor 杨波徐辉贾丽娟卫瑞红
Owner DONGHUA UNIV