Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 3, Pages 2751-2757Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.11.048
Keywords
Microbial fuel cell; Bio-electrochemical behavior; Bioelectricity; Yeast; Redox mediators
Funding
- Indian Council of Medical Research (ICMR), New Delhi
- Council of Scientific and Industrial Research (CSIR)
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Bio (microbial) fuel cell (microbial fuel cell) with Saccharomyces cerevisiae as anodic biocatalyst was evaluated in terms of power generation and substrate degradation at three redox conditions (5.0, 6.0 and 7.0). Fuel cell was operated in single chamber (open-air cathode) configuration without mediators using non-catalyzed graphite as electrodes. The performance was further studied with increasing loading rate (OLRI, 0.91 kg COD/m(3)-day; OLRII, 1.43 kg COD/m(3)). Higher current density was observed at pH 6.0[160.36 mA/(OLRI); 282.83 mA/m(2) (OLRII)] than pH 5.0 (137.24 mA/m(2)) and pH 7.0 (129.25 mA/m(2)). Bio-electrochemical behavior of fuel cell was evaluated using cyclic voltammetry which showed the presence of redox mediators (NADH/NAD(+); FADH/FAD.). Higher electron discharge was observed at pH 6.0, suggesting higher proton shuttling through the involvement of different redox mediators. The application of yeast based fuel cell can be extended to treat high strength wastewaters with simultaneous power generation. (C) 2010 Elsevier Ltd. All rights reserved.
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