A device and process for enhanced denitrification of constructed wetlands suitable for northern cold regions

A technology for constructed wetlands and cold areas, applied in aerobic and anaerobic process treatment, chemical instruments and methods, biological water/sewage treatment, etc., can solve problems such as uneven water replenishment and poor denitrification effect in constructed wetlands

Active Publication Date: 2021-07-06
XI AN JIAOTONG UNIV
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Problems solved by technology

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a device and process for strengthening denitrification of constructed wetlands suitable for cold regions in the north, and to strengthen the removal effect of ammonia nitrogen and total nitrogen in constructed wetlands in cold regions by setting a backflow water system. Significantly improve the poor denitrification effect, uneven water replenishment and winter freezing in constructed wetlands

Method used

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  • A device and process for enhanced denitrification of constructed wetlands suitable for northern cold regions
  • A device and process for enhanced denitrification of constructed wetlands suitable for northern cold regions

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Embodiment Construction

[0023] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0024] Such as figure 1 and figure 2 As shown, a backflow type denitrification strengthening device for artificial wetlands in cold regions includes a rectification area 17, and a number of deflectors 3 are arranged inside the rectification area 17 along the width direction, and the rectification area 17 is evenly divided into several sub-areas. The aspect ratio of each commutator sub-region is controlled to be ≥4. The space between the deflectors 2 is filled with asphalt-wrapped gravel packing 1 with a particle size of 1-2 cm.

[0025] At the bottom of the rectification area 17, a large-resistance water distribution pipe 4 and an aeration pipe 5 are laid, wherein the large-resistance water distribution pipe system 4 is arranged at the front of the rectification area 17, and the aeration pipe 5 is arranged at the middle and rear of the rectif...

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Abstract

An artificial wetland enhanced denitrification device and process suitable for the northern cold region, including a rectification area, the rectification area is evenly watered through the perforated flower wall, a number of deflectors are arranged along the width direction inside the rectification area, and large Resistance water distribution pipes and aeration pipes, the large resistance water distribution pipes are arranged in the front of the rectification area, and the aeration pipes are arranged in the middle and rear of the rectification area. The outlet water in the rectification area is connected with the artificial wetland through the perforated flower wall. Partially return the effluent water from the constructed wetland to the front end of the rectification area through the large-resistance water distribution pipeline, and aerate the middle and rear parts of the rectification area. The invention can realize the enhanced removal of ammonia nitrogen and total nitrogen in the artificial wetland and high-efficiency operation in winter, and can effectively save the occupied area and energy consumption of the artificial wetland.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an artificial wetland enhanced denitrification device and process suitable for northern cold regions. Background technique [0002] The eutrophication of lakes and other water environments has brought many damages to human beings, such as the environment, ecology and economy. Nitrogen is one of the main nutrients that cause eutrophication of water environments. Exogenous nitrogen load (point source and non-point source) is an important part of water environmental pollution load. The cost of traditional sewage treatment technology is too high when it is applied to the treatment of non-point source pollution where the collection system is lacking. Constructed wetlands are an important technical means to effectively reduce the exogenous nitrogen load in the water environment, and are often used in the prevention and control of eutrophication in the water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/32C02F7/00C02F101/16
CPCC02F3/302C02F3/32C02F7/00C02F2101/16C02F2301/106Y02W10/10
Inventor 王文东毛忠安刘思琪刘宗宽孙婴婴陈志文王皓
Owner XI AN JIAOTONG UNIV
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