Microbial fuel cell and application thereof

A fuel cell and microorganism technology, applied in biochemical fuel cells, fuel cells, battery electrodes, etc., can solve the problems of complex device structure, influence of original functions, and inability to restore polluted water bodies, and achieve simple device structure, cost reduction, Actionable effect

Active Publication Date: 2013-04-17
ANHUI RUBIOX VISION BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this device cannot restore polluted water bodies, and because the anode of the device is buried in the sediment and the cathode is exposed to the air, the complex structure of the device will affect the original functions of lakes, rivers or ponds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A circular carbon felt is used as the electrode, the cathode and anode are fixed by plastic tubes, the distance between the electrodes is 15cm, and the ratio of the anode and cathode electrode areas is 1:1. , external resistance is 400Ω, room temperature. The MFC device has been in operation for 28 days, and the Beijing Ruibohua data collector collects the voltage regularly to calculate the power generation efficiency; regularly measures the COD and ammonia nitrogen content in the cathode, and calculates the removal rate of the two. The results show that the COD removal rate in water is 31%, and the ammonia nitrogen removal rate is 44%; the maximum power generation efficiency of MFC is 8.3mW / m 2 , the power generation efficiency at steady state is 5.2mW / m 2 .

Embodiment 2

[0026] The circular carbon felt is used as the anode, and the graphite disk is used as the cathode. The anode and cathode are fixed by plastic tubes. The distance between the electrodes is 16cm. The ratio of the anode to cathode electrode area is 1:1. Neihu), the cathode material was taken from Taihu Lake water at the same place, the external resistance was 400Ω, room temperature. The MFC device has been in operation for 28 days, and the Beijing Ruibohua data collector collects the voltage regularly to calculate the power generation efficiency; regularly measures the COD and ammonia nitrogen content in the cathode, and calculates the removal rate of the two. The results show that the COD removal rate in the water body is 56%, the ammonia nitrogen removal rate is 51%; the maximum power generation efficiency of MFC is 12.9mW / m 2 , the power generation efficiency is 7.0mW / m when stable 2 .

Embodiment 3

[0028] The circular carbon felt is used as the anode, and the graphite disk is used as the cathode. The anode and cathode are fixed by plastic tubes. The distance between the electrodes is 12 cm. The ratio of the anode to cathode electrode area is 1.2:1. The cathode material is taken from the river water at the same place, the external resistance is 200Ω, room temperature. The MFC device has been in operation for 35 days, and the Beijing Ruibohua data collector regularly collects the voltage to calculate the power generation efficiency; regularly measures the COD and ammonia nitrogen content in the cathode, and calculates the removal rate of the two. The results show that the COD removal rate in water is 72%, the ammonia nitrogen removal rate is 68%; the maximum power generation efficiency of MFC is 92.6mW / m 2 , the power generation efficiency at steady state is 71.9mW / m 2 .

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Abstract

The invention discloses a microbial fuel cell for treating pollutants in a eutrophic water body, and belongs to the technical field of water body biologic repair. The pollutants such as ammonia nitrogen and the like in the eutrophic water body are removed at the same time of reducing the bottom sediment of the water body, and meanwhile precious electrical energy is generated. Hydroxyl ions (protons generated in neutralization oxidation reaction) are continuously supplied to an anode by using the traditional water body denitrification technology, and meanwhile protons are continuously suppliedto a cathode so as to promote smooth anode oxidation reaction and cathode reduction reaction and improve the electron yield. The treatment of the pollutants in lakes, rivers or ponds can be realized,and the generated electrical energy can be supplied to underwater electricity devices and landscape illumination, so the microbial fuel cell has important research and practice value.

Description

technical field [0001] The invention belongs to the technical field of water body bioremediation, and relates to a microbial fuel cell for simultaneously recovering electric energy from pollutants in eutrophic water bodies such as lakes, rivers or ponds. Background technique [0002] my country's rapid economic development, continuous increase in urban population, and continuous expansion of urban scale have caused many problems such as excessive consumption of resources, environmental pollution, and ecological system imbalance. Although some measures have been taken, the foundation of eutrophication in my country's water bodies has not been eliminated fundamentally, and some areas continue to show a worsening trend. According to reports, the evaluation results of the nutritional status of 84 representative lakes in the country show that 44 lakes are in a eutrophic state throughout the year, accounting for 52.4% of the total number of evaluated lakes, and the remaining lakes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/06H01M4/96C02F3/28H01M8/16
CPCY02E60/50
Inventor 李秀芬王新华
Owner ANHUI RUBIOX VISION BIOTECH
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