Bioengineering and Environmental Centre, Indian Institute of Chemical Technology, Hyderabad, India.
Bioresour Technol. 2011 Feb;102(3):2751-7. doi: 10.1016/j.biortech.2010.11.048. Epub 2010 Dec 10.
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 pH6.0 [160.36 mA/m(2) (OLRI); 282.83 mA/m(2) (OLRII)] than pH5.0 (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 pH6.0, 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.
以酿酒酵母作为阳极生物催化剂的生物（微生物）燃料电池（微生物燃料电池）在三种氧化还原条件（5.0、6.0 和 7.0）下，就发电和基质降解进行了评估。燃料电池在单室（开式空气阴极）配置中运行，不使用介质，使用未经催化的石墨作为电极。通过增加加载率（OLRI，0.91kgCOD/m³-天；OLRII，1.43kgCOD/m³）进一步研究了性能。在 pH6.0 时观察到更高的电流密度[160.36mA/m²（OLRI）；282.83mA/m²（OLRII）]，而在 pH5.0（137.24mA/m²）和 pH7.0（129.25mA/m²）时则较低。使用循环伏安法评估了燃料电池的生物电化学行为，结果表明存在氧化还原介质（NADH/NAD(+)；FADH/FAD(+)）。在 pH6.0 时观察到更高的电子放电，这表明通过不同氧化还原介质的参与，质子的转移更高。基于酵母的燃料电池的应用可以扩展到同时发电处理高强度废水。
