Enhancement of electricity production in a mediatorless air–cathode microbial fuel cell using Klebsiella sp. IR21
- 주제(키워드) Biocatalyst , Electricity , Iron-reducing bacteria , Klebsiella sp. , Microbial fuel cells
- 등재 SCIE, SCOPUS
- 발행기관 Springer Verlag
- 발행년도 2016
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000125496
- 본문언어 영어
- Published As http://dx.doi.org/10.1007/s00449-016-1579-8
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
A novel dissimilatory iron-reducing bacteria, Klebsiella sp. IR21, was isolated from the anode biofilm of an MFC reactor. Klebsiella sp. IR21 reduced 27.8 % of ferric iron to ferrous iron demonstrating that Klebsiella sp. IR21 has electron transfer ability. Additionally, Klebsiella sp. IR21 generated electricity forming a biofilm on the anode surface. When a pure culture of Klebsiella sp. IR21 was supplied into a single chamber, air–cathode MFC fed with a mixture of glucose and acetate (500 mg L−1 COD), 40–60 mV of voltage (17–26 mA m−2 of current density) was produced. Klebsiella sp. IR21 was also utilized as a biocatalyst to improve the electrical performance of a conventional MFC reactor. A single chamber, air–cathode MFC was fed with reject wastewater (10,000 mg L−1 COD) from a H2 fermentation reactor. The average voltage, current density, and power density were 142.9 ± 25.74 mV, 60.5 ± 11.61 mA m−2, and 8.9 ± 3.65 mW m−2, respectively, in the MFC without inoculation of Klebsiella sp. IR21. However, these electrical performances of the MFC were significantly increased to 204.7 ± 40.24 mV, 87.5 ± 17.20 mA m−2, and 18.6 ± 7.23 mW m−2, respectively, with inoculation of Klebsiella sp. IR21. The results indicate that Klebsiella sp. IR21 can be utilized as a biocatalyst for enhancement of electrical performance in MFC systems. © 2016 Springer-Verlag Berlin Heidelberg
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