System for treating micro-polluted water body by combining ecological wetland and plurality of ponds

Abstract

The invention provides a system for treating a micro-polluted water body by combining an ecological wetland and a plurality of ponds. The system has the key points as follows: a sedimentation pond, a buffering pond, a retention pond, a functional surface flow wetland, a stabilizing pond and an artificial surface flow wetland are sequentially constructed along the water flow direction of the micro-polluted water body; the functional surface flow wetland is an artificial wetland comprising a water distribution channel, a purifying bed, a water discharging channel and an exceeding pipe, wherein the purifying bed sequentially comprises a gravel layer with the thickness of 70cm, a packing layer with the thickness of 0.5-0.8m, a planting soil layer with the thickness of 20cm and aquatic plants from bottom to top; the water depth of an edge shallow water region of the sedimentation pond is 0.3-0.6m, and the water depth of a middle deep water region of the sedimentation pond is 1.2-2m; the water depth of a buffering region is 0.5m; the average water depth of the retention pond is 0.8-1.8m; the average water depth of the stabilizing pond is 0.6-0.8m; and the average water depth of the surface flow wetland is 0.3-0.6m. The system has the positive effects that the artificial wetland is strong in shock resistance, good in phosphorus removal effect and free of secondary pollution. Therefore, the system can be used for better taking an ecological treatment function when being compounded with the artificial wetland to treat the water body.

Description

technical field [0001] The invention relates to a system for treating slightly polluted water bodies, and the processing objects are low-concentration polluted water bodies such as sewage plant tail water and river water. Background technique [0002] In the traditional sense, oxidation ponds can be divided into aerobic ponds, facultative ponds, anaerobic ponds, aerated ponds, advanced treatment ponds, etc. according to the type of microorganisms, oxygen supply methods and functions in the ponds. However, in the application process of various oxidation ponds in actual sewage treatment projects, there are low impact load resistance, large project area, less sludge production, poor phosphorus removal effect, prone to sewage leakage and secondary pollution, and Aquatic plants are easily affected by temperature. Contents of the invention [0003] In order to solve the above technical problems, the object of the present invention is to provide a system for treating slightly po...

AI Technical Summary

Problems solved by technology

However, in the application process of various oxidation ponds in actual sewage treatment projects, there are low impact load resistance, large project area, less sludge production, poor phosphorus removal effect, prone to sewage leakage and secondary pollution, and Aquatic plants are susceptible to temperature

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