Efficient nitrogen and phosphorus removal composite ecological purification system and purification method

Abstract

The invention discloses an efficient nitrogen and phosphorus removal composite ecological purification system which is of a box-shaped structure, the periphery of the system is an ecological filter bed structure with the periphery connected, the middle of the system is a vacant cavity, and an aeration sinking bed system is arranged in the vacant cavity. The ecological filter bed structure comprises a lower phosphorus removal layer, a middle quality removal layer and an upper layer structure. A water inlet device system, an aeration device system and a vegetation layer are arranged on the upper layer. The aeration sinking bed system comprises a sinking bed system and a microporous aeration disc, wherein the sinking bed system is mounted on the inner wall of the ecological filter bed structure, and the microporous aeration disc is suspended under the sinking bed system. The system is placed in a polluted riverway or lake, sewage enters the ecological filter bed structure through the water inlet device system, sequentially flows through the vegetation layer, the substance removal layer and the phosphorus removal layer to be preliminarily purified and then enters the vacant cavity to be further purified, and the treated water overflows from the upper overflow weir. The system can efficiently remove nitrogen and phosphorus, and is convenient for maintenance and management.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and specifically relates to a compound ecological purification system for efficient nitrogen and phosphorus removal. Background technique [0002] With the progress of society, the quality of river water is deteriorating day by day, and the phenomenon of black and smelly water is getting worse day by day. The formation of black and odorous water is mainly due to the eutrophication of the water, which makes the nutrients such as nitrogen and phosphorus in the water exceed the amount that the water can hold, and cannot be effectively purified. If the nutrients in the water body exceed the standard for a long time and accumulate to a certain extent, it will cause a large number of algae and other algae to multiply, consume dissolved oxygen in the water body, and reduce the transparency of the water body. [0003] At present, the main natural water purification methods in our country ...

AI Technical Summary

Problems solved by technology

The most widely used biological method is the artificial floating island water purification method. This method uses aquatic plants planted on artificial floating islands to purify water quality, and its purification effect is limited, especially for nitrogen, phosphorus and other elements. The removal efficiency is not high.

Absorbing nitrogen and phosphorus through microbial enrichment can quickly realize the transfer of nitrogen and phosphorus elements. However, traditional microbial phosphorus removal needs to transfer phosphorus through sludge discharge. Due to the lack of carbon in the river and the excess sludge will The effect of directly turning into sediment does not achieve the effect of high-efficiency phosphorus removal

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