Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou, 510006, China; Institue of Biological and Medical Engineering, Guangdong Academy of Sciences, China.
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China.
J Environ Manage. 2022 Aug 15;316:115017. doi: 10.1016/j.jenvman.2022.115017. Epub 2022 May 19.
Seasonal leachate from both sealed and operating landfill in the identical district were employed as the sole substrate in the Microbial Fuel Cell (MFC) to evaluate the power output performance and aqueous organic waste disposal. The electrical performance was characterized to study the power generation, while the Chemical Oxygen Demand (COD) removal ratio and Coulombic Efficiency (CE) were calculated to illustrate the substrate disposal effect. In addition, Scanning Electron Microscope (SEM) on the operated anode was conducted to preliminarily explain the microbial community difference, and the phylogenetic tree constructed on the cultivated microorganism was an insight into the dominant bacteria suitable for leachate degradation. It was found that the MFCs inoculated with seasonal leachate from both sealed and operating landfill could generate electricity successfully. Although the fresh leachate-inoculated MFCs had better electrical output performance (22.7-25.6 W/m versus 6.61-7.48 W/m) and COD removal efficiency (55.8%∼61.7% versus 47.7%∼51.4%), the CEs were only 4.3%∼7.6%, which were lower than the aged leachate inoculated group (5.9%∼11.3%). Based on the SEM images and the phylogenetic tree of the operated anode, the composition impacts on the microbial community and power output performance were verified, which was instructive for the leachate disposal in the MFC.
采用同一地区封场和运行垃圾填埋场的季节性渗滤液作为唯一底物在微生物燃料电池（MFC）中，评估了其产电性能和水相有机废物处理效果。通过对电性能的表征来研究发电情况，同时通过计算化学需氧量（COD）去除率和库仑效率（CE）来评估底物处理效果。此外，对运行阳极进行扫描电子显微镜（SEM）观察，初步解释微生物群落差异，并对培养微生物构建系统发育树，深入了解适合渗滤液降解的优势菌。结果表明，接种封场和运行垃圾填埋场季节性渗滤液的 MFC 能够成功发电。虽然新鲜渗滤液接种的 MFC 具有更好的电输出性能（22.7-25.6 W/m 与 6.61-7.48 W/m）和 COD 去除效率（55.8%-61.7%与 47.7%-51.4%），但 CE 仅为 4.3%-7.6%，低于老化渗滤液接种组（5.9%-11.3%）。基于 SEM 图像和运行阳极的系统发育树，验证了组成对微生物群落和产电性能的影响，这对 MFC 中渗滤液处理具有指导意义。
