Isolation and identification of electrochemically active microorganism from micro-aerobic environment
(2014) Huanjing Kexue — Vol. 35, n° 10, p. 3933-3939 (2014)
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吴松-2014-微氧环境中电化学活性微生物的分离与鉴定.pdf
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- Abstract
- Extracellular electron transfer of electrochemically active microorganism plays vital role in biogeochemical cycling of metals and carbon and in biosynthesis of bioenergy. Compared to anaerobic anode, micro-aerobic anode captures more energy from microbial fuel cell. However, most of previous researches focused on functioning bacteria in anaerobic anode, functioning bacteria in micro-aerobic anode was rarely studied. Herein, we used the traditional aerobic screening technology to isolate functioning bacteria from a micro-aerobic anode. Three pure cultures Aeromonas sp. WS-XY2, Citrobacter sp. WS-XY3 and Bacterium strain WS-XY4 were obtained. WS-XY2 and WS-XY3 were belonged to Proteobacteria, whereas WS-XY4 was possibly a new species. Cyclic voltammetry and chronoamperometry analysis demonstrated all of them showed the electrochemical activity by direct extracellular electron transfer, and micro-aerobic anode could select bacteria that have similar electrochemical activity to proliferate on the anode. We further conclude that functioning bacteria in micro-aerobic anode are more efficient than that of anaerobic anode may be the reason that micro-aerobic anode has better performance than anaerobic anode. Therefore, a thorough study of functioning bacteria in micro-aerobic anode will significantly promote the energy recovery from microbial fuel cell.
- Affiliations
Key Laboratory of Environmental Biology and Pollution Control，Ministry of Education，College of Environmental Science and Engineering Hunan University
Citations
Wu, S., Xiao, Y., Zheng, Z., Zheng, Y., Yang, Z., & Zhao, F. (2014). Isolation and identification of electrochemically active microorganism from micro-aerobic environment. Huanjing Kexue, 35(10), 3933-3939. https://doi.org/10.13227/j.hjkx.2014.10.041 (Original work published 2014)