Department of Chemical Engineering, AC Tech, Anna University, Chennai, India.
Bioresour Technol. 2012 Nov;124:23-8. doi: 10.1016/j.biortech.2012.08.034. Epub 2012 Aug 17.
One of the bottlenecks to performance of microbial fuel cells (MFC) has been the low electron transfer from bacterial cell membrane or membrane organelle to anode. In this study, the effect of phenazines, a class of secondary metabolites was examined on the power generation in Pseudomonas aeruginosa MTCC 2474 catalysed MFC with graphite electrodes. Different metal salt-doped graphite epoxy composite electrodes (MS-GECE) were tested in phenazine supplemented MFC. With Cu(2+)-GECE as anode in oxychloraphin and tubermycin supplemented MFC, power density generated was 7831±112.5 and 2096.5±11.8 μW/m(2) respectively. However, the addition of native phenazines (pyocyanin and pyorubin) which are normally produced by the bacteria was not very helpful in performance of the MFC. Also, the addition of these phenazines inhibited the growth of bacteria as well. Thus, choice of an appropriate secondary metabolite can have a positive influence as a mediator of electron transfer in the working of MFCs.
微生物燃料电池（MFC）性能的一个瓶颈一直是从细菌细胞膜或膜细胞器到阳极的电子传递效率低。在这项研究中，研究了吩嗪类，一类次生代谢物对以石墨电极为催化剂的铜绿假单胞菌 MTCC 2474 催化的 MFC 发电的影响。在吩嗪补充的 MFC 中测试了不同金属盐掺杂石墨环氧树脂复合电极（MS-GECE）。在氧氯吩嗪和tubermycin 补充的 MFC 中，以 Cu(2+)-GECE 作为阳极，分别产生 7831±112.5 和 2096.5±11.8 μW/m(2)的功率密度。然而，细菌通常产生的天然吩嗪（绿脓菌素和吡咯菌素）的添加对 MFC 的性能并没有太大帮助。此外，这些吩嗪的添加也抑制了细菌的生长。因此，选择合适的次生代谢物可以作为电子转移介质，对 MFC 的工作产生积极影响。
