Department of Agricultural and Food Engineering, Indian Institute of Technology Kharagpu, Kharagpur, 721302, India.
Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
Appl Biochem Biotechnol. 2020 Nov;192(3):1060-1075. doi: 10.1007/s12010-020-03366-y. Epub 2020 Jul 10.
The fish market wastewater, which is rich in ammonium concentration, was investigated to explore its ability of in situ suppression of methanogenesis in the anodic chamber of microbial fuel cell (MFC) while treating it and to ensure non-reoccurrence of methanogenic consortia in the anodic chamber during its long-term operations. A lower specific methanogenic activity (0.097g chemical oxygen demand (COD)/g volatile suspended solids (VSS). day) with a higher power density (3.81 ± 0.19 W/m) was exhibited by the MFC operated with raw fish market wastewater as compared to the MFC fed with synthetic wastewater (0.219g COD/g VSS. day and 1.75 ± 0.09 W/m, respectively). The enhanced electrochemical activity of anodic biofilm of MFC fed with raw fish market wastewater than the MFC fed with synthetic wastewater further advocated the enhanced electrogenic activity and suppression of methanogenesis, because of the presence of higher ammonium content in the feed. This, in response, reduced the internal resistance (55 Ω), enhanced the coulombic efficiency (21.9 ± 0.3%) and normalized the energy recovery (0.27 kWh/m) from the MFC fed with fish market wastewater than the MFC fed with synthetic wastewater (92 Ω, 15.7 ± 0.3% and 0.13 kWh/m, respectively). Thus, while treating the fish market wastewater in the anodic chamber of MFC, any costly and repetitive treatment procedures for anodic microorganisms are not required for suppression of methanogens to ensure higher activity of electrogenic bacteria for higher electricity harvesting.
本研究旨在利用富含铵浓度的鱼类市场废水处理废水的同时，在微生物燃料电池（MFC）的阳极室内原位抑制产甲烷作用，并确保在长期运行过程中阳极室内不会再次出现产甲烷菌群。与使用合成废水运行的 MFC（0.219 g COD/g VSS.d 和 1.75±0.09 W/m，分别）相比，使用未经处理的鱼类市场废水运行的 MFC 表现出较低的特定产甲烷活性（0.097 g 化学需氧量（COD）/g 挥发性悬浮固体（VSS）. d）和更高的功率密度（3.81±0.19 W/m）。与使用合成废水运行的 MFC 相比，使用未经处理的鱼类市场废水运行的 MFC 阳极生物膜具有更高的电化学活性，这进一步证明了产电活性的增强和产甲烷作用的抑制，因为进料中存在更高的铵含量。这反过来又降低了内部电阻（55 Ω），提高了库仑效率（21.9±0.3%），并使从鱼类市场废水运行的 MFC 中归一化的能量回收（0.27 kWh/m）高于从合成废水运行的 MFC（92 Ω，15.7±0.3%和 0.13 kWh/m，分别）。因此，在 MFC 的阳极室中处理鱼类市场废水时，无需对阳极微生物进行任何昂贵且重复的处理程序来抑制产甲烷菌，以确保产电细菌具有更高的活性，从而获得更高的电量。
