An Annular Horizontal Underflow Constructed Wetland with Adjustable Operation Mode

Abstract

The invention discloses an annular horizontal subsurface flow artificial wetland with an adjustable operation mode, which belongs to the technical field of sewage treatment. The invention includes a water distribution canal and a wetland pool. The inner side of the water distribution canal is divided into a water distribution canal inlet area and a water distribution canal outlet area. The input end is connected to the upstream wetland pool, and the outlet area of ​​the distribution channel is provided with a water outlet hole of the distribution channel, and the output end of the outlet hole of the distribution channel is connected to the downstream wetland pool, and the input end of the distribution channel is provided with a water inlet tee device. The output end of the water channel is provided with a water outlet tee device. The invention allows the internal water flow to run alternately clockwise and counterclockwise periodically through the PLC valve control system to enhance the self-cleaning function of the wetland. Through the built-in program of the PLC valve control system, the starting point pool or the ending point pool can be set arbitrarily, and can take turns Multiple wetland pools prolong the service life of wetlands and reduce wetland operation and maintenance costs.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an annular horizontal subsurface flow artificial wetland with adjustable operation mode. Background technique [0002] Constructed wetland is a kind of natural wetland system that is artificially built and controlled. Through the flow of sewage in the constructed wetland, it uses the physical, chemical and biological synergies of soil, artificial media, plants, microorganisms, etc. to purify sewage. This technology has the advantages of good treatment effect, low construction and operation costs, and good landscape effects, and is currently a research hotspot in the field of sewage treatment. The traditional constructed wetland has a single structure and a fixed operation mode. When there are many suspended solids in the tail water of the sewage treatment plant and large residual chemicals, it is easy to cause devastating damage to the front wetland pool - the filling la...

AI Technical Summary

Problems solved by technology

The traditional constructed wetland has a single structure and a fixed operation mode. When there are many suspended solids in the tail water of the sewage treatment plant and large residual chemicals, it is easy to cause devastating damage to the front wetland pool - the filling layer is blocked, the plants die, and artificial The wetland loses its purification ability, and when the artificial wetland is continuously inflowing water, a single wetland pool is in a state of high pollution load for a long time, which will easily lead to irreversible damage to the wetland, or even loss of purification ability

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