Vertical undercurrent artificial wetland system capable of reinforcing removal of total nitrogen without obstruction

Abstract

The invention relates to a vertical undercurrent artificial wetland system capable of reinforcing removal of total nitrogen without obstruction. The vertical undercurrent artificial wetland system is mainly composed of a filtration column, an upward flow wetland, a downward flow wetland, a sewage backflow apparatus and an aeration apparatus. The aeration apparatus is disposed at the bottom of the downward flow wetland, and effluent flows back to a water inlet of the upward flow wetland. The sewage is subjected to grille treatment. Firstly, the sewage is introduced to the filtration column so as to remove most of the suspended materials, and then is introduced to the upward flow wetland and the downward flow wetland. The upward flow wetland is an oxygen-deficient environment that is beneficial to a denitration reaction; due to the additionally arrangement of the aeration apparatus, the downward flow wetland is an aerobic environment that is beneficial to a nitration reaction; and the effluent from the downward flow wetland flows back to the water inlet of the upward flow wetland according to a proportion. The whole process combines a conventional A/O process and the artificial wetland and forms a novel process that is used for sewage treatment and is capable of efficiently removing the total nitrogen without obstruction. The system can efficiently reduce suspension concentration of intake water of the wetland, increases removal capacity of the total nitrogen of the artificial wetland, and has strong capacity of resisting impact load. The wetland has long service life.

Description

technical field [0001] The invention relates to a non-blocking vertical flow constructed wetland system for strengthening total nitrogen removal, which is a combination of the purification features of an A / O device and a constructed wetland device. It is a vertical flow constructed wetland sewage treatment technology to improve the denitrification efficiency. Background technique [0002] Constructed wetland sewage treatment technology is a sewage ecological treatment technology that emerged in the 1970s. It has the advantages of less investment, low operating costs, convenient management, and no secondary pollution. In recent years, it has been successfully used in domestic sewage and rural point sources. and non-point source pollution, rainstorm runoff, and lake eutrophication, etc., and have achieved remarkable results. [0003] However, the low denitrification (total nitrogen) efficiency of constructed wetlands and easy blockage limit their popularization and applicatio...

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in this treatment process, as follows: 1) The process is relatively scattered and occupies a large area; 2) The process pipeline is complex and consumes a lot of energy; 3) The management is difficult

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