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Method and device for in-situ and interactively relieving biological clogging of artificial wetland

A constructed wetland and interactive technology, applied in chemical instruments and methods, biological water/sewage treatment, special treatment targets, etc., to avoid biological clogging, reduce clogging maintenance costs, and solve the effect of effluent water quality degradation

Active Publication Date: 2020-10-16
INST OF AQUATIC LIFE ACAD SINICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an interactive in-situ method for relieving biological clogging in constructed wetlands, which is simple, easy to operate, and effectively improves the problem of biological clogging in constructed wetlands

Method used

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  • Method and device for in-situ and interactively relieving biological clogging of artificial wetland
  • Method and device for in-situ and interactively relieving biological clogging of artificial wetland

Examples

Experimental program
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Effect test

Embodiment 1

[0039] An interactive in-situ method for alleviating biological clogging in constructed wetlands, the steps are as follows:

[0040] A. Fill the anode filler layer 2 on the top of the non-conductive filler layer 1, and set the bottom anode collector 6 in the anode filler layer 2;

[0041] B, fill the non-conductive filler separation layer 3 above the anode filler layer 2, the main function of this layer is as a separator between the anode filler layer 2 and the cathode filler layer 4;

[0042] C, fill the cathode filler layer 4 on the top of the non-conductive filler isolation layer 3, set the cathode collector 7 in the cathode filler layer 4, plant wetland plants 5 at the same time, the upper surface of the cathode filler layer 4 and the cathode collector 4 are exposed to the air ;

[0043] D, one end of the anode collector 6 and one end of the cathode collector 7 are connected with a load 9 or an external power supply 10 through a wire 8;

[0044] E, a switch 11 is set in ...

Embodiment 2

[0055] An interactive in-situ device for alleviating biological clogging in constructed wetlands, the device is laid with a non-conductive filler layer 1, an anode filler layer 2, a non-conductive filler isolation layer 3, and a cathode filler layer 4 from bottom to top; it is characterized in that: the anode The filler layer 2 is connected to the non-conductive filler layer 1 and the non-conductive filler isolation layer 3 respectively, the cathode filler layer 4 is connected to the non-conductive filler isolation layer 3, wetland plants 5 are planted in the cathode filler layer 4, and the anode filler layer 2 and the cathode filler layer are connected to each other. An anode collector 6 and a cathode collector 7 are respectively arranged in the packing layer 4, and the anode collector 6 is connected to the cathode collector 7 through a wire 8, a load 9 or an external power source 10, and the switch 11 is adjustable. When the switch connected to the external power source is clo...

Embodiment 3

[0068] For high-concentration COD (600-1000mg / L) sewage, the experiment compares the blockage after 60 days of operation using the method and device of the present invention and the conventional vertical flow constructed wetland (under the open circuit state). The results show that the conventional vertical flow artificial wetland has a porosity of 20-25% and a filtration rate of 20-23mL / s; the device of the present invention has a porosity of 28-31% and a filtration rate of 35-40mL / s. Compared with the conventional vertical flow constructed wetland (under the open circuit state), the relative abundance of Acinetobacter (Acinetobacter) closely related to EPS degradation in the bottom anode packing layer in the method and device of the present invention is increased by 40-110 times. The abundance of Syntrophomonas increased by 2-4 times; the abundance of Petrimonas with polysaccharide fermentation function in the middle anode packing layer increased by 4-5 times, and the proteop...

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Abstract

The invention discloses a method for in-situ and interactively relieving biological clogging of an artificial wetland. The method sequentially comprises the following steps: filling the upper part ofa non-conductive filler layer with an anode filler layer; filling a non-conductive filler isolation layer above the anode filler layer; filling the upper part of the non-conductive filler isolation layer with a cathode filler layer, arranging a cathode collector in the cathode filler layer; connecting the anode collector and the cathode collector with a load or an external power supply through wires; and arranging an adjusting switch in the connecting wire to form an external power supply mode, an internal power generation mode and an open circuit mode. In the operation process of an artificial wetland, the symptoms of filtration rate reduction, porosity reduction, and blockage happen, and the switch is adjusted to be in the internal power generation mode or the external power supply mode.The anode filler layer is connected with the non-conductive filler layer and the non-conductive filler isolation layer, and the cathode filler layer is connected with the non-conductive filler isolation layer. The biological blockage of an artificial wetland is effectively reduced, the water passing efficiency of the artificial wetland running for a long time is remarkably improved, the purification effect is maintained, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering sewage ecological purification, and more specifically relates to an interactive in-situ method for relieving biological clogging in constructed wetlands, and an interactive in-situ device for relieving biological clogging in constructed wetlands. Background technique [0002] Clogging of constructed wetlands (CW) is a bottleneck problem that limits its efficient and long-term operation, which will shorten the life of constructed wetlands and increase management and maintenance costs. Compared with physical clogging caused by influent suspended matter, chemical clogging caused by colloids or precipitation caused by chemical reactions between filler pores, biological clogging in constructed wetlands is more common, and its consequences are more serious. It is the long-term operation of CW. main limiting factor. Even if preventive measures such as influent pretreatment, substrate g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCC02F3/32C02F2303/14
Inventor 肖恩荣林莉莉吴振斌陈宇华鲁汭荣鹏李志伟
Owner INST OF AQUATIC LIFE ACAD SINICA