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DOI : , Vol.19, No.3, 11 ~ 21, 2011
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| Title |
| Evaluating Electricity Generation Using Sediment Microbial Fuel Cells with Different Anode Electrodes |
| 윤미화 Mi Hwa Yoon , 정석희 Sok Hee Jung , 이승목 Seung Mok Lee , 양재규 Jae Kyu Yang |
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| Abstract |
| Because sediment microbial fuel cells (SMFCs) utilize organic materials and microbial catalysts in river or oceanic sediment for electricity generation, high sustainability can be ensured in SMFC operation. However, oligotrophic sediment often creates limitation of electron donor (i.e., organic matter). It results in low power production and poor sustainability of SMFCs. The objective of this study is to evaluate electricity generation using sacrificial magnesium anodes and graphite anodes with or without chitin addition in SMFCs. During 40 days, maximum power densities of magnesium, graphite, magnesium and chitin, and graphite and chitin were 1100, 0, 1575 and 2 ㎽/㎡, respectively. The combination of magnesium and chitin produced the highest power, followed by magnesium electrode, showing combined electrochemical reactions from magnesium corrosion and chitin oxidation increased electricity generation by 30%. A magnesium electrode supplemented with chitin was more slowly corroded than the magnesium alone because chitin addition slowed magnesium corrosion. It shows strict oligotrophic condition of sediment, suggesting necessity of substrate addition in SMFCs. The power level obtained in our experiment using magnesium and chitin was enough for operating oceanographic instruments, which can be possibly deployed in the coastal ocean. |
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| Key Words |
| power density, sacrificial anode, SMFC, sustainability |
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