Electricity generation coupled to oxidation of propionate in a microbial fuel cell

Title
Electricity generation coupled to oxidation of propionate in a microbial fuel cell
Authors
Jae Kyung JangIn Seop ChangHwa Yeon HwangYeng Fung ChooJiYoung LeeKyung Suk Cho김병홍Kenneth H. Nealson
Keywords
Bacterial community; Electricity generation; Microbial fuel cell (MFC); Propionate; 16S rDNA
Issue Date
2010-01
Publisher
Biotechnology letters
Citation
VOL 32, NO 1, 79-85
Abstract
Propionate was used as fuel to enrich an electrochemically-active microbial consortium in a microbial fuel cell, and the bacterial consortium was analyzed by culture-independent methods including denaturing gradient gel electrophoresis (DGGE) of the 16S rDNA, and by fluorescent in situ hybridization (FISH). MFCs fed with propionate produced a current of 4.88 ± 0.1 mA stably on 100 mg propionate/l as COD within 3 weeks of the enrichment. When the MFCs were fed with H2-saturated fuel containing propionate, the current dropped to 3.82 ± 0.07 mA. The maximum current generated was up to 8.8 mA when MFCs were fed with 200 mg propionate/l as COD. The DGGE of 16S rDNA showed that propionate- enriched MFCs have a different bacterial population from that enriched with acetate and from the inoculum used for enrichment. The major member (42%) of the consortium was an unidentified bacterium followed by γ, β, and δ-proteobacteria.
URI
http://pubs.kist.re.kr/handle/201004/39401
ISSN
0141-5492
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KIST Publication > Article
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