Guangdong Provincial Key Laboratory of Microbial Culture Collection, Guangdong Institute of Microbiology, Guangzhou 510070, China.
Bioresour Technol. 2013 Jan;128:472-8. doi: 10.1016/j.biortech.2012.10.103. Epub 2012 Nov 1.
Microbial electrochemical snorkel (MES) reactor is a simplified bioreactor based on microbial fuel cells (MFCs) and has been suggested to be a promising approach to solve many environmental problems. However, the microbial processes in MES reactors have not yet been characterized. This study shows that Shewanella decolorationis S12 can use the conductive snorkel as direct electron acceptor for respiration and growth. Similar with current-generating biofilms, cellular viability in MES biofilms decreased with the distance from snorkel. MES reactors showed more rapid cell growth and substrate consumption than MFCs. Although the biomass density of MES biofilm was higher than that of anode biofilms, the current-generating capacity and electrochemical activity of MES biofilm were lower, which could be attributed to the lower cytochrome c expression in MES biofilm caused by the higher redox potential of MES. These microbiological and electrochemical properties are essential for the further development of MES reactors.
微生物电化学通气管（MES）反应器是一种基于微生物燃料电池（MFC）的简化生物反应器，被认为是解决许多环境问题的一种很有前途的方法。然而，MES 反应器中的微生物过程尚未得到表征。本研究表明，变色菌（Shewanella decolorationis）S12 可以将导电通气管作为呼吸和生长的直接电子受体。与电流产生生物膜类似，MES 生物膜中的细胞活力随着与通气管的距离的增加而降低。MES 反应器的细胞生长和底物消耗速度比 MFC 更快。尽管 MES 生物膜的生物量密度高于阳极生物膜，但 MES 生物膜的电流产生能力和电化学活性较低，这可能是由于 MES 较高的氧化还原电位导致 MES 生物膜中细胞色素 c 的表达降低所致。这些微生物学和电化学特性对于 MES 反应器的进一步发展至关重要。
