Combined town sewage treatment constructed wetland system and town sewage treatment method

Abstract

The invention relates to a combined town sewage treatment constructed wetland system and a town sewage treatment method. The system comprises a biological regulation pool unit, an aerobic degradation and microbe culture pool, a subsurface wetland and a surface flow wetland in sequential connection, wherein the biological regulation pool unit comprises a pretreatment pool A1, a pretreatment pool A2 and a mixed regulation pool, the pretreatment pool A1 and the pretreatment pool A2 are parallel, the mixed regulation pool is serially connected behind the pretreatment pool A1 and the pretreatment pool A2, floating type aquatic plants are put and cultivated in the biological regulation pool unit, a vermiculite mineral layer is paved at the bottom of the aerobic degradation and microbe culture pool, and substrates in the subsurface wetland respectively comprise a gravel layer, a fine sand layer, a gravel and fine sand mixed layer and a fine sand and red soil mixing layer form bottom to top. The system has the advantages that the advantage complementation of the treatment effect among all units can be realized, and the advantage complementation of the treatment effects in all seasons can also be realized, so TN, TP and CODcr can respectively reach better removal effect, finally, the wetland area is greatly reduced, and the goal of enhancing the decontamination effect is reached under the condition of saving the building cost and the maintenance cost.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a combined urban sewage treatment artificial wetland system and an urban sewage treatment method. Background technique [0002] Unorganized discharge of domestic sewage from villages, towns and small cities along river basins in my country is one of the important factors causing surface water pollution and eutrophication, and it is also an important and arduous task of water pollution control in my country. With the continuous expansion of the scale of cities and towns, the water consumption and drainage of cities and towns are constantly increasing, which further aggravates the shortage of water use and the pollution of water quality. The only way out to solve water pollution in vast villages and small cities is to develop and use low-cost, high-efficiency sewage treatment technologies. The rapid development of constructed wetland sewage treatment technology provides a possibl...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a combined process that can overcome the defects of a single process, realize complementary advantages, and has the advantages of low investment and operating costs, simple maintenance and management, strong impact load resistance, and obvious ecological landscape improvement effects. Constructed wetland system for urban sewage treatment, and discloses an efficient urban sewage treatment method

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