Anditalea andensis ANESC-S-T- An Alkaliphilic Halotolerant Bacterium Capable of Electricity Generation under Alkaline-Saline Conditions

作者：Shi Wei; Wang Victor Bochuan; Zhao Cui E; Zhang Qichun; Loo Say Chye Joachim; Yang Liang^*; Xu Chenjie

来源：PLos One, 2015, 10(7): e0132766.

DOI：10.1371/journal.pone.0132766

A great challenge in wastewater bioremediation is the sustained activity of viablemicroorganisms, which can contribute to the breakdown of waste contaminants, especially in alkaline pH conditions. Identification of extremophiles with bioremediation capability can improve the efficiency of wastewater treatment. Here, we report the discovery of an electrochemically active alkaliphilic halotolerant bacterium, Anditalea andensis ANESC-S-T (=CICC10485T=NCCB 100412(T)), which is capable of generating bioelectricity in alkaline-saline conditions. A. andensis ANESC-S-T was shown to grow in alkaline conditions between pH 7.0-11.0 and also under high salt condition (up to 4 wt% NaCl). Electrical output was further demonstrated in microbial fuel cells (MFCs) with an average current density of similar to 0.5 mu A/cm(2), even under the harsh condition of 4 wt% NaCl and pH 9.0. Subsequent introduction of secreted extracellular metabolites into MFCs inoculated with Escherichia coli or Pseudomonas aeruginosa yielded enhanced electrical output. The ability of A. andensis ANESC-S-T to generate energy under alkalinesaline conditions points towards a solution for bioelectricity recovery fromalkaline-saline wastewater. This is the first report of A. andensis ANESC-S-T producing bioelectricity at high salt concentration and pH.

• 出版日期2015-7-14
• 单位南阳理工学院