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Microbial Fuel Cells (MFCs) are an emerging technology that uses bacteria to generate electricity from waste.
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Breweries are ideal for the implementation of microbial fuel cells, as their wastewater composition is always the same; these constant conditions allow bacteria to adapt and become more efficient.
MFC technology does not have the power to change the world single-handedly; microbial fuel cells will never be able to produce enough electricity to take the place of a coal-fired power plant.
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Traditional MFCs usually consist of a bioanode in which bacteria community attached on the anode (known as biofilm) degrade organic carbon sources and transfer the electrons generated from intracellular metabolisms to electrodes.
With future development, MFCs have the potential to produce hydrogen for fuel cells, desalinate sea water, and provide sustainable energy sources for remote areas.
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In this work, biological removal of ammonia and nitrite from contaminated waters and potential for producing electricity were studied using conventional bioreactors and microbial fuel cell (MFC) type bioreactors.
Performance of the microbial fuel cell (MFC) has been compared with bioreactors which are conventionally used for nitrification in wastewater treatment plants.
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"Floating-Type Microbial Fuel Cell (FT-MFC) for Treating Organic-Contaminated Water." 43.5 (2009): 1642-647.
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Development of high-performance microbial fuel cells by enhancing extracellular electron transfer between bacteria ..
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In this century, most of the company uses the electricity from the fossils fuels such as oil, gas and coal. Thismethod will give negative impact to the environment and the fossils fuel will be run out. This project is to develop amicrobial fuels cell that can produce electricity. There are several types of the microbial fuel cell, which are single chamber, double chamber and continuous. In this paper, the double chamber microbial fuel cell was selected to investigate the effect of suspended sludge into the double chamber microbial fuels cell. The salt bridge will construct between both chambers of the double chamber microbial fuels cell. Carbon graphite rod is selected as electrode at the cathode and anode to transfer the electron from anode to cathode. Electricity is generated from the anaerobic oxidation of organic matter by bacteria. At the end of this project, the microbial fuels cell was successful to generate electricity that can be used for aspecific application.
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Electricity generation from readily biodegradable organic substrates accompanied by decolorization of azo dye was investigated using a Microbial fuel cell (MFC). Biodegradation was the dominant mechanism of the dye removal, and glucose was the optimal substrate for Red Cibacron-2G (RC) decolorization. Batch experiments were conducted to evaluate the performance of the MFC. As compared to traditional anaerobic technology higher decolorization efficiency was achieved by MFC. Effect of initial dye concentration and external resistance on power generation were studied. Polarization experiments were also directed to find the maximum power density. Maximum Power density of 100mW/m2 (1.04A/m2) was recorded at optimum operating conditions.
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There is around 9.5 kJ/L of energy contained in UK wastewater which is wasted through traditional aeration treatment. Microbial fuel cell (MFC) technology provides a new approach to carry the promise of both treating wastewater without aeration and producing renewable energy in the form of electricity and H2. This work has contributed to making this a reality.
In this work, MFC designs were developed and constructed to test their energy performances. The power densities ranged from 13.3 mW/m2 to 30 mW/m2. The coulombic efficiency based on the contained substrates is in the range of 1 % to 7 0/0. The Chemical Oxygen Demand (COD) removal conversion per pass of MFCs arrived at 3.0 0/0. The H2 recovery rate was about 14 % with H2 yield of 11.6 mg/g COD. Comparative study suggested that continuous flow, no membrane and single chamber design can be used effectively in MFC for further application.
The high temperature CO2 oxidation treatment of carbon anode materials resulted in an improvement of power by a factor of 2 when applied to MFC. Scanning Electron Microscopy (SEM) study and the textural property measurements based on Brunauer Emmett Teller (BET) theory suggested that treatments help bacteria to grow on the material surface resulting in power improvement. Graphite as cathode decreased the MFC power density by around 50 % compared to that of MFC with Pt contained cathode, but the cost is 1/1000 that of the Pt makes it a very attractive alternative.
A typical industry case study for implementation of MFC were carried out that considerable energy cost savings and water disposal savings can offset the installation within 1-2 year. It shows that the MFC technology has a promising future for the sustainable development of the world with further research.
Theses/Dissertations from 2016 2016
In many ways, a microbial fuel cell is an extension of the electron transport chain where the final step of the process (the combination of oxygen, electrons, and H+ to form water) is transferred outside of the bacterial cell from which energy can be harvested.
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