Responses from freshwater sediment during electricity generation using microbial fuel cells |
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| Authors: | Seok Won Hong In Seop Chang Yong Su Choi Byung Hong Kim Tai Hak Chung |
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| Institution: | (1) Center for Environmental Technology Research, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul, 130-650, Korea;(2) Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology, Cheomdan-gwagiro, Buk-gu, Gwangju, 500-712, Korea;(3) School of Life Science and Biotechnology, Korea University, Anam-dong, Sungbuk-ku, Seoul, 136-701, Korea;(4) School of Civil, Urban, and Geosystem Engineering, Seoul National University, San 56-1, Sillim-dong, Gwanak-gu, Seoul, 151-742, Korea |
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| Abstract: | In a two-electrode system, freshwater sediment was used as a fuel to examine the relationship between current generation and
organic matter consumption with different types of electrode. Sediment microbial fuel cells using porous electrodes showed
a superior performance in terms of generating current when compared with the use of non-porous electrodes. The maximum current
densities with thicker and thin porous electrodes were 45.4 and 37.6 mA m−2, respectively, whereas the value with non-porous electrodes was 13.9 mA m−2. The amount of organic matter removed correlated with the current produced. The redox potential in the anode area under closed-circuit
conditions was +246.3 ± 67.7 mV, while that under open-circuit conditions only reached −143.0 ± 7.18 mV. This suggests that
an application of this system in organic-rich sediment could provide environmental benefits such as decreasing organic matter
and prohibiting methane emission in conjunction with electricity production via an anaerobic oxidation process. |
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| Keywords: | Anaerobic oxidation Electrodes Microbial fuel cell Redox potential Sediment |
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