A microbial fuel cell device with aquatic plant electrodes in constructed wetlands

A technology of aquatic plants and artificial wetlands, applied in biochemical fuel cells, battery electrodes, sustainable biological treatment, etc., can solve the problems of high cost, achieve high power generation, low planting cost, and good degradation effect

Inactive Publication Date: 2011-11-30
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology helps reduce costs by reducing the amount of water needed per unit area while effectively treat contaminating liquids like industrial effluents. It also allows for longer operation cycles without requiring expensive equipment due to its unique design features. Additionally, this system uses advanced plankton grown crops instead of expensive metal catalyst material, making them more effective at capturing sunlight during photosynthesis process. Overall, these technical benefits help create sustainability solutions through efficient environmental management practical applications.

Problems solved by technology

Technologies described in this patents involve various technical means used to improve the efficiency of generating useful substances like hydrogen gas during combustion processes. However, these technologies have limitations due to factors including limited space availability, complexity design, difficulty in maintaining stable operation over time, and potential negative impacts upon ecologists' interests.

Method used

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  • A microbial fuel cell device with aquatic plant electrodes in constructed wetlands
  • A microbial fuel cell device with aquatic plant electrodes in constructed wetlands

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Effect test

Embodiment 1

[0029]Embodiment 1 (a microbial fuel cell device of a constructed wetland aquatic plant electrode of the present invention):

[0030] The heights of the cathode tank 1 and the anode tank 2 are both 1.5 meters. The separator 3 is made of PVC material and has 50 rows of through holes at the bottom, each row of 100 through holes with a diameter of 100 mm. Calamus is planted in cathode tank 1, and canna is planted in anode tank 2. Cathode tank 1 and anode tank 2 are provided with the same filler 7, large-grained zeolite is set 30mm upward from the bottom of the device, the middle is filled with small-grained stones, and the upper part is filled with quartz sand. The dosage ratio (weight) is about 3:2:1. Both the cathode electrode 8 and the anode electrode 9 are made of carbon felt.

[0031] After testing, the energy consumption per unit of water treated by the above-mentioned microbial fuel cell device is 0.36kW·h / m 3 , the removal efficiency of organic matter is over 90%, and t...

Embodiment 2

[0036] Embodiment 2 (the microbial fuel cell device of the second constructed wetland aquatic plant electrode of the present invention)

[0037] The height of the cathode tank 1 and the anode tank 2 is 1 meter. The separator 3 is made of PE material, and there are 10 rows of through holes at the bottom, each row of 100 through holes, and the aperture is 100mm. Reeds are planted in the cathode tank 1, and reeds are planted in the anode tank 2. Cathode tank 1 and anode tank 2 are equipped with the same filler 7, large particles of charcoal are placed 30mm up from the bottom of the device, the middle is filled with small particle stones, and the upper part is filled with quartz sand. The dosage ratio (weight) is about 3:2:1. Both the cathode electrode 8 and the anode electrode 9 are made of carbon paper.

[0038] After testing, the energy consumption per unit of water treated by the above-mentioned microbial fuel cell device is 0.2kW·h / m 3 , the removal efficiency of organic ma...

Embodiment 3

[0043] Embodiment 3 (the microbial fuel cell device of the third constructed wetland aquatic plant electrode of the present invention)

[0044] The height of the cathode tank 1 and the anode tank 2 are both 1.8 meters. The separator 3 is made of PP material and has 30 rows of through holes at the bottom, each row of 100 through holes with a diameter of 60mm. Elephant grass is planted in the cathode tank 1, and wild ancient grass is planted in the anode tank 2. Cathode tank 1 and anode tank 2 are equipped with the same filler 7, and large-grained gravel is set 30mm upward from the bottom of the device, the middle part is filled with granular activated carbon, and the upper part is filled with quartz sand. The dosage ratio is about 1:3:1. The cathode electrode 8 is made of nickel foam, and the anode electrode 9 is made of carbon nanotubes.

[0045] After testing, the energy consumption per unit of sludge treated by the above-mentioned microbial fuel cell device is 0.2kW·h / m 3 ...

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Abstract

A microbial fuel cell device for aquatic plant electrodes in constructed wetlands, which belongs to the field of environmental protection and new energy. It includes a cathode tank and an anode tank. The special feature is that the cathode tank and the anode tank are separated by a separator, and the separator has a The plate shape of the through hole; the catholyte and the cathode electrode are arranged in the cathode tank, the anolyte and the anode electrode are arranged in the anode tank, and the anode electrode, the external resistance and the cathode electrode are connected by wires in sequence; the cathode tank and the upper part of the anode tank are connected with the Higher aquatic plants are respectively planted at the air contact positions. In the present invention, the planting cost of higher aquatic plants is very low, and the whole device does not need to use expensive selective permeable membranes and traditional cathode electrode materials loaded with precious metals such as platinum and gold, which greatly reduces the manufacturing cost; the device is applied When used in pollutant purification work such as sewage treatment, it has a long operating cycle, simple maintenance, strong decontamination ability, good pollutant degradation effect, and fully utilizes solar energy to generate high power.

Description

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Claims

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Application Information

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Owner WUHAN UNIV OF TECH
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