Differential biofilms characteristics of Shewanella decolorationis microbial fuel cells under open and closed circuit conditions.
Differential biofilms characteristics of Shewanella decolorationis microbial fuel cells under open and closed circuit conditions.
复制标题
DOI：
10.1016/j.biortech.2011.04.073
复制
发表时间：
2011-07
影响因子：
11.4
通讯作者：
Yonggang Yang;G. Sun;Jun Guo;Meiying Xu
中科院分区：
文献类型：
--
作者：
Yonggang Yang;G. Sun;Jun Guo;Meiying Xu
微生物燃料电池（mfc）中舍瓦氏菌的生物膜形成能力及其在当前一代中的作用已被证明是物种依赖的。了解生物膜的生长和代谢是优化当前一代mfc的必要条件。在本研究中，希瓦氏菌脱色iss12分别用于闭路和开路mfc。阳极。iss12生物膜产生的电流是浮游细胞的5倍，在当前一代中起主导作用。闭路时阳极生物膜的活力维持在98±1.2%，而开路时96 h生物膜的活力下降到72±7%。开路mfc生物膜的无活力区域主要位于生物膜的内层。在开路MFCs中，生物膜活力的下降可以通过切换到闭环来恢复，这表明MFCs中的电流产生阳极可以作为一个有利的电子受体，并提供足够的能量来支持生物膜内的细胞生长和代谢。
Biofilms formation capacities ofShewanellaspecies in microbial fuel cells (MFCs) and their roles in current generation have been documented to be species-dependent. Understandings of the biofilms growth and metabolism are essential to optimize the current generation of MFCs.Shewanella decolorationisS12 was used in both closed-circuit and open-circuit MFCs in this study. The anodicS. decolorationisS12 biofilms could generate fivefold more current than the planktonic cells, playing a dominant role in current generation. Anodic biofilms viability was sustained at 98 ± 1.2% in closed-circuit while biofilms viability in open-circuit decreased to 72 ± 7% within 96 h. The unviable domain in open-circuit MFCs biofilms majorly located at the inner layer of biofilm. The decreased biofilms viability in open-circuit MFCs could be recovered by switching into closed-circuit, indicating that the current-generating anode in MFCs could serve as a favorable electron acceptor and provide sufficient energy to support cell growth and metabolism inside biofilms.