Rural sewage water quality purification system and method

Abstract

Discloses are rural sewage water quality purification system and method. The rural sewage water quality purification system comprises a first-stage sewage treatment unit and a second-stage sewage purification unit connected in sequence. The first-stage sewage treatment unit comprises a sewage collecting storage tank and an aerobic bio-membrane reaction tank; the sewage collecting storage tank is used for collecting sewage and performing anaerobic fermentation treatment, and the aerobic bio-membrane reaction tank is connected with the sewage collecting storage tank; a deflector is arranged in the aerobic bio-membrane reaction tank which is divided into an anaerobic zone and an aerobic zone through a perforated plate; an agitating pump is mounted in the anaerobic zone, an aerator coil / pipe is mounted in the aerobic zone, and a cyclic cross flow is formed in the aerobic bio-membrane reaction tank under action of the agitating pump and the aerator coil / pipe so as to remove COD and NH4+-N.The second-stage sewage purification unit comprises a wetland plant bed provided with a phosphorous-removal packing layer, a nitrogen-removal packing layer and a plant ecological layer inside, and achieves sewage purification under synergistic effect of physics, chemicals and biology. The invention further provides a purification method utilizing the rural sewage water quality purification system.

Description

technical field [0001] The invention relates to a rural sewage treatment technology, in particular to a natural multi-unit rural sewage water purification system and purification method. Background technique [0002] Natural rivers have a certain water quality self-purification ability, which can absorb and decompose pollutants through the degradation of microorganisms and aquatic plants in the water, so that the water body can be purified. However, if the drainage from rural life, livestock and poultry breeding is directly discharged into the river without effective treatment, a large amount of organic matter, nitrogen, phosphorus, and pathogenic bacteria will be brought into the river. These pollutants are far greater than the self-purification capacity of the river, which will cause eutrophication As a result, dissolved oxygen decreases, aquatic plants and fish gradually die, and the aquatic ecological environment is destroyed. However, rural areas are generally far away...

AI Technical Summary

Problems solved by technology

However, if the drainage from rural life, livestock and poultry breeding is directly discharged into the river without effective treatment, a large amount of organic matter, nitrogen, phosphorus, and pathogenic bacteria will be brought into the river. These pollutants are far greater than the self-purification capacity of the river, which will cause eutrophication The dissolved oxygen decreases, the aquatic plants and fish gradually die, and the aquatic ecological environment is destroyed

However, rural areas are generally far away from cities, and do not have the conditions for sewage to enter the municipal pipe network; resources, the production and life style of modern society lead to the one-way flow of most phosphorus elements, and its final destination is the sediment layer of the deep sea, while only a small part of the phosphorus sinking into the deep sea can return to the land through shallow sea fish or seabirds, resulting in The gradual decline of phosphorus resources

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