Researchers are working on improving the efficiency of microbial fuel cells (MFC) by using modified graphite felt. Primary results show that the new MFC can generate 20 percent higher voltage than usual cells.
Over the past 20 years, nearly three-fourths of human-caused emissions came from the burning of fossil fuels. Increasing pollution and decreasing fossil energy resources encourage scientists to look for new clean and sustainable alternative energy resources. Microbial fuel cells, which are also being researched at KTU laboratories have broad usage possibilities and are one of the cleanest known energy sources. MFCs are powered by living microorganisms with clean and sustainable features; they can generate electricity from broad range of organic substrates under natural conditions.
“Microbial fuel production is probably the only technology, in which the electricity is being generated from oxidation of organic compounds in room temperature. In other words, there is no need to burn anything, and the process is not depending on sunlight”, says Dr Kristina Kantmnienė researcher at KTU Faculty of Chemical Technology.
According to KTU researchers, MFC technology is unique because of its multifunctional application: for example, wastewater and slime, collected in wastewater treatment plants can be also used as food for bacteria. Integration of MFC into wastewater treatment system would significantly reduce the usage of electrical energy for its exploitation and would turn the plant into the closed ecosystem. The energy surplus produced by MFC might be integrated into the electricity grid and used elsewhere.
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