Sewage treatment system and method for combined tidal flow artificial wetland

Abstract

The invention discloses a sewage treatment system for combined tidal flow artificial wetland, belonging to the technical field of sewage treatment. The system comprises a non-powered automatic water charging device (9), an artificial wetland bed and a non-powered automatic water discharging device (2), wherein the non-powered automatic water charging device (9) is positioned above the artificial wetland bed and is communicated with the artificial wetland bed through a siphon water inlet pipe (10); the artificial wetland bed is provided with a water discharging layer (5), a denitrification reinforcing layer (7), a reinforcing reaeration layer (8) and an aerobic ecological sand layer (17) from the bottom up; and the non power automatic water discharging device (2) and the artificial wetlandbed form a connector and are connected with each other through the bottom water discharging layer (5). The invention further discloses a sewage treatment method using the system, comprising two stepsof waterflooding absorption and emptying reaeration. Compared with the traditional combined wetland, the sewage treatment system for the combined tidal flow artificial wetland increases daily sewage treatment amount and reduces construction cost.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a combined tidal flow artificial wetland sewage treatment system and method. Background technique [0002] With the increase of population and the rapid development of economy, the amount of sewage discharge has also increased rapidly in recent years, leading to the increasingly serious water pollution, eutrophication of water body and the deterioration of environmental water quality in my country. At present, my country's sewage treatment mainly relies on the traditional centralized water treatment process. Although the technology and process are becoming more and more perfect, it is facing the problem of high construction and operation costs, which makes many places simply unable to build large sewage treatment plants or many have already Due to the shortage of operating funds and idle use, only 24% of industrial wastewater and 4% of domestic sewage in our c...

AI Technical Summary

Problems solved by technology

In the traditional vertical flow constructed wetland bed, the sewage flows through the surface of the microbial film attached to the substrate by gravity, and the effective contact area and contact time with the microbial film are limited, so that the pollutants in the wastewater cannot be completely absorbed and decomposed, thereby affecting Wetland removal effect

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