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Artificial wetland-microbial fuel cell coupling device with multi-medium filter material and wastewater treatment method by using device

A technology of constructed wetland and coupling device, which is applied in biological water/sewage treatment, electrochemical-biological combined treatment, water/sewage treatment, etc. The lack of research on denitrification mechanism has achieved the effect of strengthening electron transfer ability, good interception effect, and optimization of film hanging ability.

Inactive Publication Date: 2019-08-20
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantages are: there are many management steps, it is more complicated, and it is easy to be blocked, which will cause it to fail to run in the later stage
Chinese patent application numbers 201110187473.3, 201410437150.9, and 201610020185.1 respectively introduce several different configurations of microbial fuel cell artificial wetland devices for sewage treatment, all of which achieve the purpose of generating electricity while treating sewage, but the sewage purification effect and Average power generation efficiency
However, due to the complex reaction process in the wetland matrix, the wetland matrix has a great influence on the degradation of pollutants and the power generation capacity of CW-MFC.
In addition, different wetland substrates will affect the mass transfer of CW-MFC
However, there are few studies on the role of wetland matrix in the removal of pollutants in CW-MFC, and the related research on the denitrification mechanism of wastewater by CW-MFC coupling system is also relatively scarce.

Method used

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  • Artificial wetland-microbial fuel cell coupling device with multi-medium filter material and wastewater treatment method by using device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The artificial wetland and microbial fuel cell coupling device of a kind of multi-media filter material of the present embodiment is diameter 30cm, the plexiglass column of height 56cm, is sieve plate, zeolite layer (20cm), anode layer (10cm) from bottom to top. The biological ceramsite layer (20cm), the cathode layer (2.5cm), the plant chooses canna, the resistance is 1000Ω, the treatment object is artificially prepared wastewater, the hydraulic retention time is 2d, and the influent flow rate is 5.21ml / min. The system has been running continuously for 3 months, the influent COD concentration is 350mg / L, the ammonia nitrogen concentration is 30.5mg / L, and the total nitrogen concentration is 32.7mg / L. By monitoring the effluent quality every day, the average voltage of the system is 345.2±84.39mV, the effluent COD concentration is 32mg / L, and the removal rate is 90.8%; the effluent ammonia nitrogen concentration is 5.75mg / L, and the removal rate is 81.2%; The nitrogen c...

Embodiment 2

[0037] The artificial wetland and microbial fuel cell coupling device of a kind of multi-media filter material of the present embodiment is diameter 30cm, the plexiglass column of height 56cm, is sieve plate, zeolite layer (20cm), anode layer (10cm) from bottom to top. The biological ceramsite layer (20cm), the cathode layer (2.5cm), the plant chooses canna, the resistance is 1000Ω, the treatment object is artificially prepared wastewater, the hydraulic retention time is 2d, and the influent flow rate is 5.21ml / min. Increase the influent load, the influent COD concentration is 400mg / L, the ammonia nitrogen concentration is 36.1mg / L, and the total nitrogen concentration is 40.3mg / L. By monitoring the effluent water quality every day, the average voltage of the system is 383.9±89.69mV, the effluent COD concentration is 35mg / L, and the removal rate is 91.25%; the effluent ammonia nitrogen concentration is 4.05mg / L, and the removal rate is 88.78%; The nitrogen concentration is 10....

Embodiment 3

[0039] The artificial wetland and microbial fuel cell coupling device of a kind of multi-media filter material of the present embodiment is diameter 30cm, the plexiglass column of height 56cm, is sieve plate, zeolite layer (20cm), anode layer (10cm) from bottom to top. The biological ceramsite layer (20cm), the cathode layer (2.5cm), the plant chooses canna, the resistance is 1000Ω, the treatment object is artificially prepared wastewater, the hydraulic retention time is 2d, and the influent flow rate is 5.21ml / min. The system has been running continuously for 3 months, the influent COD concentration is 350mg / L, the ammonia nitrogen concentration is 30.5mg / L, and the total nitrogen concentration is 32.7mg / L. By monitoring the effluent quality every day, the average voltage of the system is 345.2±20.39mV, the effluent COD concentration is 32mg / L, and the removal rate is 90.8%; the effluent ammonia nitrogen concentration is 5.75mg / L, and the removal rate is 81.2%.

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Abstract

The invention discloses an artificial wetland-microbial fuel cell coupling device with a multi-medium filter material and a wastewater treatment method by using the device, and belongs to the technical field of sewage treatment and electrochemical coupling. The artificial wetland substrate is prepared by the multi-medium filter material, and coconut shell activated carbon and stainless steel netsare used as an anode and a cathode. Emergent aquatic plants are planted, and aeration pipe are arranged. The device comprises a sieve plate, a zeolite zone, an anode zone, a ceramsite zone and a cathode zone from bottom to top; the anode zone and the cathode zone are both laid by the stainless steel meshes and are connected through an external circuit; an outer resistance is arranged between the anode and the cathode; an outflow water collecting zone and an inflow water distribution zone are respectively arranged at the upper part and the lower part, and the outflow water collecting zone and the inflow water distribution zone are respectively connected with a water supply system and a drainage system; a water inlet tank is connected with the bottom of the device; and a water outlet is formed in the upper part of the device. According to the system, the coupling effect of artificial wetland and a microbial fuel cell is fully exerted, and the multi-medium filter material is utilized, sothat the denitrification effect is enhanced, electricity generation performance is improved, and recycling of resources is realized.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and electrochemical coupling, and in particular relates to a multi-media filter material artificial wetland microbial fuel cell coupling device and a wastewater treatment method thereof. Background technique [0002] In today's era, science and technology continue to develop, economic levels continue to improve, the world's population continues to increase, and the quality of life continues to improve. However, while human civilization continues to develop, it has also brought a series of problems to the earth we depend on for survival. Among them, energy shortage and environmental pollution have become major problems facing the world, which have seriously affected the survival and development of human beings. threat. At present, water treatment technology mainly adopts activated sludge method and chemical treatment method, but the cost of these methods is relatively high, the operating ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16
CPCC02F1/281C02F3/005C02F3/30C02F3/32C02F9/00C02F2101/16
Inventor 李超周康操家顺罗景阳方芳张春雷冯骞薛朝霞
Owner HOHAI UNIV
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