Enhanced denitrification subsurface flow wetland with half-way aeration coupled with iron carbon and operation method of the enhanced denitrification subsurface flow wetland

Abstract

The invention provides an enhanced denitrification subsurface flow wetland with half-way aeration coupled with iron carbon and an operation method of the enhanced denitrification subsurface flow wetland. The enhanced denitrification subsurface flow wetland comprises a wetland pool, an aeration device, a dissolved oxygen monitoring system, wetland plants, an upper filler layer, a middle filler layer, a lower filler layer, a bottom impermeable layer, a water inlet pipe communicated with the upper filler layer and a water outlet pipe communicated with the lower filler layer, wherein the wetland plants, the upper filler layer, the middle filler layer, the lower filler layer and the bottom impermeable layer are sequentially arranged in the wetland pool from top to bottom, and the aeration device comprises an aeration pump, an aeration pipe and an aeration head. In order to solve the problems of bed anoxia, insufficient carbon source, easy blockage of matrix, low denitrification efficiency and the like in the subsurface flow constructed wetland treatment process, different anoxic, anaerobic and oxygen-enriched areas are created by arranging the iron-carbon functional layer and optimizing filler grading, aeration mode, aeration strength and the like, the nitrification and denitrification strength of the subsurface flow constructed wetland is remarkably improved, and the denitrification effect is improved.

Description

technical field [0001] The invention relates to the technical field of subsurface flow constructed wetlands for treating agricultural non-point source pollution, in particular to a semi-aeration coupled iron-carbon enhanced denitrification subsurface flow wetland and an operating method, which are suitable for agricultural non-point source sewage, rural domestic sewage, and sewage plant tailings. The ecological treatment of different types of sewage such as water is especially suitable for the purification of agricultural non-point source pollution with high nitrogen and phosphorus loads and the reduction of pollution loads. Background technique [0002] Non-point source pollution, as a typical non-point source pollution, means that during the rainfall process, rainwater and its runoff flow through the ground, gather a series of pollutants, and then enter the water body, polluting surface water and groundwater mainly in rivers and lakes. With the characteristics of wide geog...

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide an enhanced denitrification underflow wetland with half-cycle aeration coupled with iron-carbon, aiming at the above-mentioned problems about the packing design and operating conditions of the high-efficiency denitrification of the subsurface wetland. This sewage treatment technology is simple in structure, low in treatment cost, and has good purification and landscape effects. It is suitable for the purification and treatment of high-nitrogen farmland discharge water in irrigation areas, sewage plant tail water, polluted surface water, and rural domestic sewage. and control the serious pollution of rivers and lakes by non-point sources

Images