Biotechnology Sector, Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry, 1646 Abiko, Abiko-shi, Chiba-ken 270-1194, Japan.
Bioresour Technol. 2010 May;101(10):3415-22. doi: 10.1016/j.biortech.2009.12.076. Epub 2010 Jan 13.
Methanogenic bioreactors, which are packed with supporting material, have attracted attention as an efficient means of degrading garbage. We aimed to increase bioreactor performance by using an electrochemical system to regulate the electrical potential on supporting material. At an organic loading rate of 26.9g dichromate chemical oxygen demand (CODcr)/L/day, reactors with a potential of -0.6 or -0.8V, generated by a cathodic electrochemical reaction, showed greater removal of CODcr and methanogenesis than reactors with a potential of 0.0 or -0.3V, generated by anodic reaction, or control reactors without electrochemical regulation. 16S rRNA gene analysis revealed that the same methanogens were present in all our reactors, but quantitative real-time polymerase chain reaction showed that higher prokaryotic and methanogenic copy numbers were present on cathodic electrodes than on anodic or control electrodes. These results indicate that cathodic electrochemical regulation can support methane fermentation from garbage.
作为一种高效的垃圾降解手段，填充有支撑材料的产甲烷生物反应器受到了关注。我们旨在通过使用电化学系统来调节支撑材料上的电势能，以提高生物反应器的性能。在 26.9g 重铬酸盐化学需氧量（CODcr）/L/天的有机负荷率下，由阴极电化学反应产生的-0.6 或-0.8V 的电位的反应器，比由阳极反应产生的 0.0 或-0.3V 的电位的反应器或没有电化学调节的对照反应器，显示出更高的 CODcr 去除率和产甲烷作用。16S rRNA 基因分析表明，所有反应器中都存在相同的产甲烷菌，但实时定量聚合酶链反应显示，在阴极电极上存在更高的原核和产甲烷菌拷贝数，而在阳极或对照电极上则较低。这些结果表明，阴极电化学调节可以支持垃圾的甲烷发酵。
