Hong, Seok Won Kim, Hyung Joo Choi, Yong Su Chung, Tai Hak 2024-01-20T22:31:24Z 2024-01-20T22:31:24Z 2021-09-03 2008-11 0253-2964 https://pubs.kist.re.kr/handle/201004/133005 Since particular bacteria are able to oxidize organic matter under anaerobic conditions with concomitant electricity generation while an electrode is serving as an electron acceptor in a fuel cell environment, microbial fuel cells (MFCs) have recently received significant attention. Prototype sediment MFCs were placed in a shallow hypereutrophic lake and generated current for over six months. During the experimental period, a higher electrical current density with an average of 20.4 mA/m(2) was produced using electrodes with higher specific surface areas. Furthermore, parallel connection of sediment MFCs increased the current output. The results showed that current production was severely dependent on temperature and dissolved oxygen concentrations at the cathode. Other findings of this study include not only the direct coupling of current production with a decrease in the organic matter content of the sediment, as well as high positive redox potentials (> +120 mV vs. SHE) in the vicinity of the active anode as compared to sediments where electrodes were not embedded. This implies that the electrochemically active anode evidently acted as an alternative electron acceptor in the sediment, which likely decreased the activity of methanogens and improved the overall decrease in organic matter of sediment. Consequently, this study suggests that the sediment MFC could provide a means for the bioremediation of organic-rich sediment via anaerobic oxidation in conjunction with current production. English WILEY-V C H VERLAG GMBH Field Experiments on Bioelectricity Production from Lake Sediment Using Microbial Fuel Cell Technology Article 1 BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.29, no.11, pp.2189 - 2194 BULLETIN OF THE KOREAN CHEMICAL SOCIETY 29 11 2189 2194 N scie scopus kci ART001525637 000262091500021 2-s2.0-57349140941 Chemistry, Multidisciplinary Chemistry Article WASTE-WATER TREATMENT ELECTRICITY-GENERATION MARINE-SEDIMENTS METHANE PRODUCTION ENERGY POWER CHALLENGES ELECTRODES OXIDATION CATHODE Anaerobic oxidation Lake sediment Microbial fuel cell Organic matter Redox potential