Multiple-component filler matrix undercurrent wet land purifying and processing apparatus and undercurrent wet land purifying method

Abstract

The invention discloses a purifying equipment and method of multi-component fill base underflow wetland, which is characterized by the following: the purifying pond displays cubic box with baffle in the middle to separate pond into upgoing pond and descending pond; the fill is filled with pond, which is rough grain size layer, high-effective dephosphorization layer and middle grain size layer to fill upgoing pond and descending pond alternatively; the filling course forms the composition of diafiltrating material with different grain sizes and diafiltrating coffeciency, which produces wave flow-running shape to proceed anaerobic and consumptive procedure reciprocally in the effluent purifying course.

Description

technical field [0001] The invention relates to an underflow wetland purification treatment equipment, in particular to a multi-component filler matrix underflow wetland purification treatment equipment and an underflow wetland purification method. Background technique [0002] Since the 1970s, water treatment technology of constructed wetlands has attracted people's attention. It has the advantages of low investment and low energy consumption, and has become a research hotspot in water environment technology. Subsurface flow wetland is a new technology of artificial wetland sewage treatment, which is an artificially constructed, controllable and engineered wetland system. [0003] Currently, existing subsurface wetlands include three key components: plants, microorganisms, and substrates. Fillers with different particle sizes are artificially constructed to form a bed for the matrix. Water-resistant plants with high decontamination efficiency are planted on the surface of ...

AI Technical Summary

Problems solved by technology

However, there are still many defects and deficiencies. Plants and microorganisms in subsurface wetlands are greatly affected by climate, especially in the improvement of water environment in northern cities. Due to the impact of winter freezing period, the wetland system cannot operate due to the freezing of aquifer layers; subsurface wetlands The microorganisms in the wetland rely on the natural formation during the operation process, and high-efficiency microbial bacteria cannot be added artificially, and the role of microbial degradation in subsurface wetlands cannot be fully exerted, especially the treatment effect in the early stage of wetland construction is poor, and the recovery process of microorganisms in spring is slow.

Under the low dissolved oxygen content inside the subsurface wetland, the aerobic microbial action in the surface aerobic zone is weakened, the water quality of the effluent is poor, and the dissolved oxygen concentration of the effluent is low, which is not conducive to the self-purification of the receiving water body

Most of the matrix fillers are made of gravel packing beds. The variety and composition of the matrix fillers are relatively simple. The single composition of the matrix fillers forms a relatively uniform permeation system. The operation process of the water body is a simple horizontal movement, and the exchange between the upper and lower water bodies is poor. The water flow exchange between the upper aerobic and lower anaerobic zones is weak, resulting in a decrease in the purification treatment effect

In order to increase the exchange of upper and lower water bodies and prolong the water flow path in some horizontal flow wetlands, weirs are artificially set up at the bottom of the wetland treatment pool. Although the exchange intensity of the upper and lower water bodies is increased and the water flow path is extended, it is easy to form dead water areas and cause overall purification. Processing efficiency drops

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