Method and apparatus for intensifying denitrification in coupling microorganism electrolytic tank of upstream vertical flow artificial wetland

A technology of microbial electrolytic cell and constructed wetland, which is applied in the field of uplink vertical flow constructed wetland coupled with MEC to strengthen denitrification, can solve the problems of high construction cost of microbial electrolytic cell, difficulty in popularization and application, high operating cost, etc., and achieve the goal of increasing total nitrogen Removal effect, avoid frequent replacement, enhance the effect of removal efficiency

Active Publication Date: 2016-01-13
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, a single microbial electrolysis cell requires high construction costs and high operating costs, making it difficult to promote and apply it on a large scale in China
[0010] At present, there are no reports at home and abroad on the application of MEC to the denitrification of constructed wetlands.

Method used

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  • Method and apparatus for intensifying denitrification in coupling microorganism electrolytic tank of upstream vertical flow artificial wetland

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Effect test

Embodiment 1

[0039] A method for strengthening denitrification with an upward vertical flow constructed wetland coupled with a microbial electrolytic cell (MEC), the steps are as follows:

[0040] A. The water is evenly distributed from the bottom of the system, and the waste water first rises in a plug flow along the non-conductive filler layer 1 at the bottom. Due to the adsorption, retention and oxidation of fillers and microorganisms, most of the organic matter can be effectively degraded, and heterotrophic denitrification Bacteria use organic carbon sources as electron donors to reduce part of nitrate nitrogen to nitrogen gas;

[0041] B. Then the waste water flows into the anode conductive filler layer 2, and the unoxidized organic matter can be completely removed in this layer, and part of the nitrate nitrogen is further removed due to heterotrophic denitrification;

[0042] C, then waste water flows into the non-conductive filler isolation layer 3, the function of this layer is mai...

Embodiment 2

[0046] An ascending vertical flow artificial wetland coupled with a microbial electrolytic cell (MEC) enhanced denitrification device, the device is laid with a bottom non-conductive filler layer 1, an anode conductive filler layer 2, a non-conductive filler isolation layer 3, and a cathode conductive filler layer from bottom to top. Layer 4 and the upper non-conductive filler layer 5 are characterized in that: the anode conductive filler layer 2 is connected to the bottom non-conductive filler layer 1 and the non-conductive filler isolation layer 3 respectively, and the cathode conductive filler layer 4 is respectively connected to the non-conductive filler isolation layer 3, The upper non-conductive filler layer 5 is connected, wetland plants 6 are planted in the upper non-conductive filler layer 5, the anode collector 7 and the cathode collector 10 are respectively connected to the negative pole and the positive pole of the DC power supply 8 through wires 9 to form a closed l...

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Abstract

The invention discloses a method and apparatus for intensifying denitrification in a coupling microorganism electrolytic tank of an upstream vertical flow artificial wetland. The method comprises the following steps: A, uniformly distributing water at the bottom of a system, raising waste water in a pushing flow manner along a bottom non-conducting filler layer firstly; B, enabling the waste water to flow in an anode conducting filler layer; C, then enabling the waste water to flow in a non-conducting filler isolated layer which is a separator between a cathode conducting filler layer and the anode conducting filler layer; D, enabling the waste water to flow in the cathode conducting filler layer, and carrying out autotrophic denitrification removal on nitrate nitrogen; and E, enabling the waste water to flow out of a drain pipe in the upper non-conducting filler layer. The anode conducting filler layer is connected with the non-conducting filler isolated layer and the bottom non-conducting filler layer respectively, the cathode conducting filler layer is connected with the upper non-conducting filler layer and the non-conducting filler isolated layer respectively, and a cathode collector and an anode collector are placed in the cathode conducting filler layer and the anode conducting filler layer respectively. The operation is simple, and the removal capability of the upstream vertical flow artificial wetland for the waste water containing low carbon and high nitrate nitrogen is greatly improved.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and more specifically relates to a method for enhancing denitrification by coupling an upward vertical flow constructed wetland with a microbial electrolytic cell (MEC), and also relates to a device for enhancing denitrification by coupling an upward vertical flow constructed wetland to a MEC. Background technique [0002] In China's current water pollution, nitrogen has gradually risen as the main pollutant. A large amount of nitrogen-containing sewage is discharged into water bodies without treatment or incomplete treatment, leading to eutrophication of water bodies. Therefore, the removal of nitrogen is one of the urgent problems in the field of sewage treatment, and the research and application of nitrogen removal technology has attracted widespread attention. In the actual sewage biological denitrification process, only when the C / N ratio is greater than 6 can the denitrifying bacteria’s need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F3/34C02F3/30C02F101/16
CPCY02W10/10
Inventor 吴振斌许丹肖恩荣周银徐栋贺锋周巧红
Owner INST OF AQUATIC LIFE ACAD SINICA
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