Artificial wetland purifying system for free waterfall aeration

Abstract

The invention discloses an artificial wetland purifying system for free waterfall aeration. The system consists of multiple stages of stepped artificial wetlands, wherein the gradient of a bed bottom (3) of each stage of wetland bed is between 3 percent and 6 percent; the included angle between a back side wall (5) and the bed bottom (3) is alpha which is more than 90 degrees and less than or equal to 120 degrees; a guide plate (10) is vertically arranged at the upper end of the back side wall (5); a baffle plate (6) with equal width to the wetland bed is vertically arranged on the middle back part of the wetland bed, and partitions the wetland bed into a filler pool (7) and a collecting basin (8); a water flow channel is reserved between the lower end of the baffle plate (6) and the bed bottom (3); and the top end of the back side wall (5) is lower than the top end of the baffle plate (6). The system makes full use of free waterfall aeration and oxygenation, has the characteristics of small floor area, high dissolved oxygen level, good treatment effect, difficulty in causing dead angles and the like, and is particularly suitable for special terrains with gradients.

Description

technical field [0001] The invention relates to an artificial wetland sewage purification system, which belongs to the technical fields of artificial wetland, water body ecological restoration and sewage treatment. Background technique [0002] With the development of economy and society and the improvement of human awareness of environmental protection, people have higher and higher requirements for environmental quality, especially water environment quality. The water quality improvement of natural rivers, natural lakes, urban inland rivers and urban park inner lakes is urgently to be solved. , Rural non-point source pollution also urgently needs to be controlled. Constructed wetland is a sewage treatment technology with plants as the core, which can effectively remove pollutants such as nitrogen and phosphorus in sewage, and promote the circulation and reuse of nutrients in sewage; it can improve the regional climate and provide a good environment for various organisms. ...

AI Technical Summary

Problems solved by technology

However, due to the biochemical processes such as root zone absorption and microbial degradation in the process of plant adsorption, dissolved oxygen is required. At present, most of the constructed wetlands at home and abroad adopt a planar structure. Soaked in water, resulting in low level of dissolved oxygen in the constructed wetland matrix, which limits the effect of wetland sewage treatment

At the same time, planar constructed wetlands are prone to dead angles, and their clogging problem has become one of the important factors restricting the development of constructed wetlands

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