alexa Microbial Electrolysis Cells And Shifting Microbial Communities: Implications For Improved Biogas Production | 70828
ISSN: 2471-9315

Applied Microbiology: Open Access
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12th International Congress on Microbial Interaction and Applications of Beneficial Microbes

Wonbeom Shin, Beom Lee and Jungyu Park
Chungbuk National University, Republic of Korea
Posters & Accepted Abstracts: Appli Micro Open Access
DOI: 10.4172/2471-9315-C1-006
Abstract
Microbial electrolysis cells (MECs) are being studied for improving efficiency of anaerobic digester and reviewed for a new direction of enhancing efficiency of biogas production. This study operates general anaerobic digester (AD) and anaerobic digester combined with MECs (ADMEC) for food waste leachate. Using the effects of MECs on methane yield and the analyzing method of 454-pyrosequencing, we recognize the effects of MECs reaction on change of microbial communities. In result, steady state period in ADMEC was shortened than AD and methane yield during steady state was measured as 0.20 L CH4/g COD removed and 0.34 L CH4/g COD removed each for AD and ADMEC, respectively. Analysis of Archaea during steady state period shows that the dominant species in AD was Methanobacterium beijingens and Methanobacterium petrolearium, and that the dominant species in ADMEC was Methanosarcina thermophila using acetate, methanol, methylated amines and Methanobacterium formicicum using H2 and CO2. There were no substantial differences in dominant bacterial species. Clostridia class was more abundant than Bacteroidia class in both reactors. Compared to AD and ADMEC showed a 40% increase in overall bacterial population, increasing the removal of organic matters and the conversion of volatile fatty acids (VFAs). In other words, the MECs reaction more effectively converts organic matters to VFAs and activates microbial communities favorable for methane production.
Biography

Wonbeom Shin has done his Master’s degree from the Chunbuk National University of Environmental Engineering.

Email: [email protected]

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