Electricity generation by Rhodopseudomonas palustris DX-1
Electricity generation by Rhodopseudomonas palustris DX-1
复制标题
DOI：
10.1021/es800312v
复制
发表时间：
2008-06-01
影响因子：
11.4
通讯作者：
Logan, Bruce E.
中科院分区：
文献类型：
--
作者：
Xing, Defeng;Zuo, Yi;Logan, Bruce E.
能够在微生物燃料电池（MFC）中发电的细菌引起了人们的极大兴趣，但很少有菌株能够在这些系统中产生高电力。在此，我们报告从 MFC 中分离出的光养紫色非硫细菌沼泽红假单胞菌 DX-1 与同一装置中的混合培养物相比，能够以更高的功率密度 (2720 +/- 60 mW/m(2)) 产生电力。虽然红假单胞菌属物种因其产生氢气的能力而闻名，但此前并未证明它们可以在 MFC 中发电，并且无需光或氢气生产即可产生电流。菌株 DX-1 利用多种底物（挥发酸、酵母提取物和硫代硫酸盐）以不同的代谢模式进行发电，这使其对于研究 MFC 中的发电以及从一系列简单和复杂的有机物来源发电非常有用。这些结果表明，光养紫色非硫细菌可以通过 MFC 中的直接电子转移有效地发电，为 MFC 研究提供了另一种模型微生物。
Bacteria able to generate electricity in microbial fuel cells (MFCs) are of great interest, but there are few strains capable of high power production in these systems. Here we report that the phototrophic purple nonsulfur bacterium Rhodopseudomonas palustris DX-1, isolated from an MFC, produced electricity at higher power densities (2720 +/- 60 mW/m(2)) than mixed cultures in the same device. While Rhodopseudomonas species are known for their ability to generate hydrogen, they have not previously been shown to generate power in an MFC, and current was generated without the need for light or hydrogen production. Strain DX-1 utilizes a wide variety of substrates (volatile acids, yeast extract, and thiosulfate) for power production in different metabolic modes, making it highly useful for studying power generation in MFCs and generating power from a range of simple and complex sources of organic matter. These results demonstrate that a phototrophic purple nonsulfur bacterium can efficiently generate electricity by direct electron transfer in MFCs, providing another model microorganism for MFC investigations.