화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.38, No.11, 2347-2352, November, 2021
DOI10.1007/s11814-021-0927-9  Export Citation
Performance evaluations of yeast based microbial fuel cells improved by the optimization of dead zone inside carbon felt electrode
Kyuhwan Hyun1, Seongjun Kim2, and Yongchai Kwon1, 3, †
  • 1Graduate school of Energy and Environment, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea
  • 2Department of New and Renewable Energy Convergence, Seoul National University of Science and Technology, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea
  • 3Department of New and Renewable Energy Convergence, Seoul National University of Science and Technology,, 232 Gongneung-ro, Nowon-gu, Seoul 01811, Korea
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The performance of yeast-based microbial fuel cells (MFCs) and the growth pattern of yeast were evaluated with the optimization of dead zone within carbon felt (CF) electrode. Yeast cells were grown onto the different CFs that have 1 to 4mm thicknesses, while optical and electrochemical evaluations were implemented to determine the optimal growth pattern of yeast and to elucidate a relationship between the growth pattern of yeast and the performance of MFC. According to the evaluations, biofilm consisting of high-density yeast cells is formed in the upper 1mm height of CF electrode. As the height goes down, density of yeast cells is reduced to less than half of the upper biofilm, and by calculating the growth rate of yeast cells per CF volume, it is recognized that the coverage of biocatalyst including yeast cell increases from 0.191 to 0.406 μmol/cm3 with decreasing CF thickness. Then, the performance of MFCs using biocatalysts including yeast cells grown on different thick CFs is measured to investigate how the growth pattern of yeast cells affects the performance of MFCs. Results show their maximum power density (MPD) increases linearly as the area that yeast cells are filled increases, and when CF thickness is 1mm, MPD reaches 417.13 W/m3.
Keywords:Yeast;Biofilm;Carbon Felt;Growth Pattern of Yeast;Microbial Fuel Cells
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