Phenol-degrading anode biofilm with high coulombic efficiency in graphite electrodes microbial fuel cell
| Autor: | Zhixing Xiao, Zhiling Li, Xue Zhou, Arata Katayama, Takanori Awata, Dongdong Zhang, Chunfang Zhang |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
Microbial fuel cell Bioelectric Energy Sources Microorganism Bioengineering 010501 environmental sciences 01 natural sciences Applied Microbiology and Biotechnology Redox Catalysis law.invention Microbiology 03 medical and health sciences Electricity law RNA Ribosomal 16S Anaerobiosis Electrodes 0105 earth and related environmental sciences Phenol Chemistry Biofilm Cathode Anode 030104 developmental biology Chemical engineering Biofilms Graphite Cyclic voltammetry Geobacter Oxidation-Reduction Faraday efficiency Biotechnology |
| Zdroj: | Journal of Bioscience and Bioengineering. 123:364-369 |
| ISSN: | 1389-1723 |
| Popis: | A microbial fuel cell (MFC), with graphite electrodes as both the anode and cathode, was operated with a soil-free anaerobic consortium for phenol degradation. This phenol-degrading MFC showed high efficiency with a current density of 120 mA/m2 and a coulombic efficiency of 22.7%, despite the lack of a platinum catalyst cathode and inoculation of sediment/soil. Removal of planktonic bacteria by renewing the anaerobic medium did not decrease the performance, suggesting that the phenol-degrading MFC was not maintained by the planktonic bacteria but by the microorganisms in the anode biofilm. Cyclic voltammetry analysis of the anode biofilm showed distinct oxidation and reduction peaks. Analysis of the microbial community structure of the anode biofilm and the planktonic bacteria based on 16S rRNA gene sequences suggested that Geobacter sp. was the phenol degrader in the anode biofilm and was responsible for current generation. |
| Databáze: | OpenAIRE |
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