Superimposed Composite Vertical Flow Constructed Wetland Sewage Treatment Device

Abstract

The invention aims to provide an overlap type composite sewage treatment device used for vertical flow artificial wetland and having a high efficient denitrification function. The main structure of the device comprises an upper aerobic tank, a lower anaerobic tank and an external communication pipeline, wherein the aerobic tank and the anaerobic tank are vertically overlapped, separated in the middle and communicated through the external communication pipeline. According to the device, the nitrogen removal rate of the wetland system can be effectively increased through artificial creation of necessary conditions for denitrification, the removal rate of nitrate nitrogen and total nitrogen in sewage treatment plant tail water after deep denitrification treatment with the device is increased by 20%-50%, the occupied area is reduced by half, and the water environment quality of receiving water is effectively improved; meanwhile, with the adoption of the device, the pollution load of wetland feed water can be effectively increased, and the area occupied by the wetland is remarkably reduced.

Description

technical field [0001] The patent of the invention relates to the technical field of water pollution control, in particular to a superimposed compound vertical flow artificial wetland sewage treatment device, which has the advantages of high denitrification efficiency, small footprint and convenient management. [0002] technical background [0003] As an irreplaceable natural resource, water resources play an important role in economic development and people's lives. my country is a seriously water-scarce country, and the spatial-temporal distribution of water resources, as well as the intra-year and inter-annual distribution, are seriously uneven. At the same time, my country's water environment pollution situation is grim. The latest report on the state of the environment shows that the seven major water systems, lakes, reservoirs and groundwater in some areas in China have been polluted to varying degrees, which has further exacerbated the shortage of available water res...

AI Technical Summary

Problems solved by technology

[0006] In engineering applications, constructed wetlands have the problem of occupying a large area, which greatly limits the promotion and application of constructed wetlands in cities, etc.

[0007] Based on the above problems, the predecessors have made a lot of attempts to solve this difficulty, and there have been wave-shaped submerged flow, falling flow, compound vertical flow, aeration type, combined artificial wetland and other technologies, but they have not fundamentally solved this problem.