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Biological and ecological sectional method for purifying and treating domestic sewage

Inactive Publication Date: 2009-12-16
袁伟刚
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Problems solved by technology

The disadvantage of the above technical solution is that the aeration tank uses the natural contact between the water surface of the earth pond and the air to supply oxygen to the biochemical aeration pond, the aeration efficiency is low, and the earth pond occupies a large area

Method used

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Embodiment Construction

[0030] 1. The first stage processing system

[0031] The domestic sewage flows into the biochemical reaction device after being treated by regulating tank and grid sedimentation. The biochemical reaction device is composed of three parts: hydrolytic acidification tank, contact oxidation tank and facultative sedimentation tank. There are biofilm belts inside.

[0032] A. Hydrolysis and acidification pool: The depth of the hydrolysis and acidification pool is 4 meters, and the residence time of sewage is 3 hours. There is a water distribution system to realize uniform water distribution, so that the sewage can fully contact with the biofilm belt. Dissolved oxygen is controlled at 0.2mg / L, so that the microbial community on the biofilm belt is dominated by anaerobic microorganisms. Through the metabolism of anaerobic microorganisms, some organic matter is degraded, and the refractory macromolecular organic matter is decomposed into small molecular organic matter. The follow-up pr...

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Abstract

The invention discloses a biological and ecological sectional method for purifying and treating domestic sewage, comprising the following steps: sending the sewage into a first treatment system, comprising a hydrolysis acidification pool, a contact oxidation pond and a anaerobic settling tank, then sending the sewage into a second treatment system, comprising a biofilm belt aeration pipe oxidation pond; finally sending the sewage into a third treatment system, comprising a biofilm belt deep processing oxidation pond. The organisms for purifying and treating domestic sewage in three stage continuously comprises bacteria, algae, protozoa, metazoan, large-scale plants, fish, benthic animals and the like which form complete food chains and ecosystems and the organisms can deeply treat domestic sewage and has high nitrogen and phosphorus removal rate. By using the invention, the degradation function of natural organisms can be fully achieved, thus the water quality purification and improvement can be realized. The method has the advantages that the system has stable running, strong impact resistant and load resistant ability, high safety and high system controlling and regulating, the systematic upgrading of water quantity and water quality can be easily realized and a park-like sewage treatment plant can be established by combine the system with landscapes.

Description

technical field [0001] The invention relates to a method for purifying and treating domestic sewage, in particular to a method for adopting biological and ecological segmental purification and treating domestic sewage. Background technique [0002] The traditional method of purification and treatment of domestic sewage is to use gravel, gravel, soil, etc. as the matrix, plant wetland plants in it to form an artificial wetland, and purify domestic sewage through matrix adsorption, microbial degradation and plant absorption. The disadvantages of the above-mentioned methods are that the purification and treatment efficiency of domestic sewage is low, the constructed wetland occupies a large area, and the system management is complex and requires a large amount of management. Advanced methods of purification and treatment of domestic sewage, such as Chinese Invention Patent No. 200410051577.1, titled: "A Method of Efficient Constructed Wetland Treatment of Domestic Sewage" discl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F3/32C02F3/34
CPCY02W10/10
Inventor 李颖
Owner 袁伟刚
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