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  • long-term effect of set potential on biocathodes in microbial fuel cells: electrochemical and phylogenetic characterization

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 638
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     the long-term effect of set potential on oxygen reducing biocathodes was investigated in terms of electrochemical and biological characteristics. three biocathodes were poised at 200, 60 and −100 mv vs. saturated calomel electrode (sce) for 110 days, including the first 17 days for startup. electrochemical analyses showed that 60 mv was the optimum potential during long-term operation. the performance of all the biocathodes kept increasing after startup, suggesting a period longer than startup time needed to make potential regulation more effective. the inherent characteristics without oxygen transfer limitation were studied. different from short-term regulation, the amounts of biomass were similar while the specific electrochemical activity was significantly influenced by potential. moreover, potential showed a strong selection for cathode bacteria. clones 98% similar with an uncultured bacteroidetes bacterium clone cg84 accounted for 75% to 80% of the sequences on the biocathodes that showed higher electrochemical activity (60 and −100 mv).

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