Method and system for improving denitrification efficiency of underflow artificial wetlands

A technology of artificial wetland and denitrification efficiency, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of low carbon and nitrogen in sewage and low denitrification efficiency

Inactive Publication Date: 2011-09-07
ANHUI ACADEMY OF ENVRIONMENTAL SCIENCE RESEARCH
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Problems solved by technology

[0004] The present invention aims to provide a method and system for improving the denitrification efficiency of subsurface constructed wetlands, aiming at the problems of low denitrification efficiency of subsurface flow constr

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  • Method and system for improving denitrification efficiency of underflow artificial wetlands
  • Method and system for improving denitrification efficiency of underflow artificial wetlands
  • Method and system for improving denitrification efficiency of underflow artificial wetlands

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[0019] The present invention will be described in detail below in conjunction with the accompanying drawings of the specification. However, the scope of the present invention is not limited to this.

[0020] Such as figure 1 Shown are grid well 1, anaerobic hydrolysis tank 2, filtration unit 6, micro-aeration and oxygenation unit 7, first-level constructed wetland 3, carbon source supplementary pool 8, second-level constructed wetland 4, carbon source supplementary pool 9 , Micro-aeration and oxygenation unit 7 and three-level constructed wetland 5. This treatment method can achieve high-efficiency treatment of sewage, especially improving the denitrification efficiency of sewage through multiple effects such as microbial degradation of domestic sewage, filter adsorption of fillers, and absorption of aquatic plants.

[0021] figure 2 These are the plan and sectional views of the grid well 1 and the anaerobic hydrolysis tank 2 of the present invention. The grid well 1 is provided...

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Abstract

The invention relates to a method and a system for improving the denitrification efficiency of underflow artificial wetlands. The system comprises a grating well 1, an anaerobic hydrolytic pond 2, a filter unit 6, a micro-aeration oxygenating unit 7, a primary artificial wetland 3, a carbon source replenishing pond 8, a secondary artificial wetland 4, a carbon source replenishing pond 9 and a third artificial wetland 5 which are connected in series with one another. By the system, a carbon nitrogen ratio of sewage can be improved, the denitrification efficiency of the sewage can be improved, and the sewage can be treated at high efficiency. The method and the system have the advantages of low investment cost and operating cost, high impact load resistance, convenience of maintenance and management and the like.

Description

1. Technical field [0001] The invention relates to a sewage treatment method and a system thereof, in particular to a method and a system for improving denitrification efficiency of an underflow constructed wetland. 2. Background technology [0002] As a sewage treatment technology, constructed wetlands have been widely promoted and applied all over the world. Constructed wetlands have low energy consumption and low management requirements during operation. Since West Germany built the first constructed wetland in 1974, constructed wetlands have developed rapidly in the 1980s. According to statistics, there were 174 constructed wetlands in North America until the 1970s. By 2006, there were more than 10,000 constructed wetlands in Europe, and nearly 20,000 constructed wetlands in North America. Domestic research on constructed wetlands started relatively late. Since the late 1980s, constructed wetland sewage treatment projects have been built in Tianjin, Beijing Changping, S...

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Application Information

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IPC IPC(8): C02F9/14
Inventor 张浏陈云峰巫建光谢贤政张彦辉朱慧娈
Owner ANHUI ACADEMY OF ENVRIONMENTAL SCIENCE RESEARCH
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