Sewage treatment system and method based on vortex separation
A sewage treatment system, eddy current separation technology, applied in the environmental field, can solve the problems of difficult separation of sludge particles and activated sludge, difficulty in sedimentation treatment in secondary settling tanks, easy loss of sludge particles, etc.
Active Publication Date: 2022-07-15
湖南五方环境科技研究院有限公司
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Problems solved by technology
[0012] The main purpose of the present invention is to provide a sewage treatment system and method based on eddy current separation, aiming at solving the problem of sludge particles and Activated sludge is difficult to separate, resulting in the easy loss of sludge particles and the technical problem of difficult sedimentation treatment in the secondary settling tank
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[0076] The present invention provides a specific embodiment as follows: the influent water is taken from the fine grille effluent of the urban sewage treatment plant, and the water quality characteristics are as follows: COD is 200-424 mg / L; ammonia nitrogen (NH 4 + -N) concentration is 32.3-48.6mg / L; total nitrogen (TN) concentration is 35.6-52.7mg / L; total phosphorus (TP) concentration is 3.29-6.12mg / L; pH is 6.9-7.7; From the activated sludge at the end of the aerobic tank, the concentration of inoculated sludge is 3000mg / L. The functional carrier is composed of expanded perlite and pyrite powder. The particle size distribution is between 50-100um, and the dosage is 8g / L. L; the inoculated sludge, functional carrier and sewage are fully mixed in the biochemical tank 10, the hydraulic retention time is controlled at 5h, the dissolved oxygen in the aerobic zone is controlled at 2mg / L, after culturing and domestication for 20d, the microorganisms complete the film formation on...
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The invention relates to a sewage treatment system and method based on vortex separation, the sewage treatment system comprises a biochemical pool, a centrifugal separation device, a secondary sedimentation tank and a drainage device, the centrifugal separation device is used for centrifugally separating a material introduced by the drainage device into active sludge with light specific gravity and sludge particles with large specific gravity, and the particle size distribution of the sludge particles is 50-500 [mu] m; the centrifugal separation device comprises a rotary driving part, a rotary connecting piece, a curved-surface centrifugal blade and a rotational flow barrel with a barrel inner cavity, the first end of the rotary connecting piece extends into the rotational flow barrel to be connected with the first side of the curved-surface centrifugal blade, and the second end of the rotary connecting piece is connected with the rotary driving part. According to the sewage treatment system based on vortex separation, sludge particles are intercepted at the front end of the secondary sedimentation tank, so that the microbial biomass of the biochemical tank is increased; all sludge particles are prevented from entering the secondary sedimentation tank, the actual operation load of the secondary sedimentation tank is reduced, the treatment capacity of the secondary sedimentation tank is improved, the sludge particles are recycled, and the cyclic utilization rate of the functional carrier is improved.
Description
technical field [0001] The invention relates to the field of environmental technology, and in particular, to a sewage treatment system and method based on vortex separation. Background technique [0002] With the increasingly prominent environmental capacity and water environment problems, the requirements for environmental protection continue to increase. Existing sewage treatment plants are faced with the requirement to upgrade the effluent quality from the first-class B standard to the first-class A standard or even higher standards. There are two types of wastewater biological treatment methods currently commonly used: [0003] (1) One is the activated sludge method, which is characterized in that the microorganisms that treat the sewage are in a suspended state in the bioreactor; [0004] (2) The second type is the microorganism attachment growth method for sewage treatment, in which microorganisms are attached to a certain form of carrier surface to immobilize and gr...
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Patent Timeline
Login to View More IPC IPC(8): C02F3/12C02F3/30B04B5/12
CPCC02F3/1226C02F3/302B04B5/12C02F2209/08Y02W10/10
Inventor 万丽张淞萱
Owner 湖南五方环境科技研究院有限公司