Terminal treatment system and method for purifying urban non-point source organic pollution

Abstract

The invention discloses a terminal treatment system and method for purifying urban non-point source organic pollution. The system comprises a biological reaction device and a soil infiltration device; the biological reaction device comprises a heat preservation container, and the heat preservation container is filled with a porous three-dimensional net bubble microorganism symbiotic carrier material, a microorganism enzyme preparation and a nutrient solution in a mixed mode; an aeration device for supplying oxygen to the heat preservation container is further arranged at the bottom of the heat preservation container; the soil percolation device comprises a soil layer, a filler layer, a sand layer and a gravel layer which are sequentially arranged from top to bottom, and emergent aquatic plants are planted on the soil layer; sewage to be treated is led in from the bottom of the biological reaction device and and led out from the top of the biological reaction device, then falls into the soil infiltration device from top to bottom, and is discharged after being purified by the soil infiltration device. The system and the method can deeply degrade organic matters and ammonia nitrogen in a water body, improve a water body environment and restore a water ecosystem, so that the self-purification capacity of the water body is restored.

Description

technical field [0001] The invention relates to a system and method for water pollution treatment, in particular to a terminal treatment system and method for purifying urban non-point source organic pollution. Background technique [0002] The rapid development of urbanization has caused a series of ecological and environmental problems, among which urban non-point source pollution cannot be underestimated. [0003] Urban non-point source pollution refers to the serious pollution of rivers caused by pollutants entering rivers under the action of precipitation and runoff. At present, the restoration methods for heavily polluted rivers mainly include biological methods, chemical methods and physical methods. Among them, the biological method has the advantages of high efficiency, low cost and no secondary pollution, and is widely used. It has achieved certain results in practice in some areas of my country, but the purification effect on organic matter is not ideal. [0004...

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Problems solved by technology

Among them, the biological method has the advantages of high efficiency, low cost and no secondary pollution, and is widely used. It has achieved certain results in practice in some areas of my country, but the purification effect on organic matter is not ideal.

[0004] On the one hand, it is because the removal effect of organic matter is often only evaluated by indicators such as COD and BOD. These indicators are difficult to reflect the change characteristics of the composition and content of dissolved organic matter (DOM) in the process of biological treatment of heavily polluted water bodies, and DOM plays an important role in water bodies. It is an important carbon source and energy source for heterotrophic microorganisms in water; secondly, matrix filler is one of the key factors affecting the effect of bioremediation, while common matrix fillers on the market have low biocompatibility, The specific surface area is small and easy to age, which cannot meet the requirements of heavily polluted rivers.

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