Biotechnology Program, Center of Excellence in Innovative Biotechnology for Sustainable Utilization of Bioresources, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
Biotechnology Program, Center of Excellence in Innovative Biotechnology for Sustainable Utilization of Bioresources, Faculty of Agro-Industry, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
Bioresour Technol. 2022 Feb;346:126559. doi: 10.1016/j.biortech.2021.126559. Epub 2021 Dec 17.
This study aimed to develop efficient microbial fuel cells (MFCs) for integrated bioelectricity, biodiesel feedstock production and wastewater treatment. Among wastewaters tested, MFC fed with anaerobic digester effluent from rubber industry gave the maximum power density (55.43 ± 1.08 W/m) and simultaneously removed COD, nitrogen and phosphorus (by 72.4 ± 0.9%, 40.5 ± 0.8% and 24.4 ± 1.5%, respectively). 16S rRNA gene analysis revealed that dominant microbial communities were: Firmicutes (43.68%), Bacteroidetes (25.41%) and Chloroflexi (15.02%), which mostly contributed to bioelectricity generation. After optimizing organic loading rate, photosynthetic oleaginous microalgae were applied in cathodic chamber in order to increase oxygen availability, secondarily treat anodic chamber effluent and produce lipids as biodiesel feedstocks. Four MFCs with photosynthetic-cathodic chamber connected in vertical cascade could improve power density up to 116.9 ± 15.5 W/m, sequentially treat wastewater, and also produce microalgal biomass (465 ± 10 g/m) with high lipid content (38.17 ± 0.01%). These strategies may greatly contribute to sustainable development of integrated bioenergy generation and environment.
本研究旨在开发高效微生物燃料电池（MFC），用于集成生物电能、生物柴油原料生产和废水处理。在所测试的废水中，以橡胶工业厌氧消化器废水为燃料的 MFC 产生的最大功率密度（55.43±1.08 W/m）最高，同时去除 COD、氮和磷（分别为 72.4±0.9%、40.5±0.8%和 24.4±1.5%）。16S rRNA 基因分析显示，主要微生物群落为：厚壁菌门（43.68%）、拟杆菌门（25.41%）和绿弯菌门（15.02%），它们主要有助于生物电能的产生。在优化有机负荷率后，将光合产油微藻应用于阴极室，以增加氧气供应，二次处理阳极室废水并生产生物柴油原料。四个带有光合阴极室的 MFC 以垂直级联方式连接，可以将功率密度提高到 116.9±15.5 W/m，依次处理废水，同时产生高脂质含量（38.17±0.01%）的微藻生物质（465±10 g/m）。这些策略可能对集成生物能源生产和环境的可持续发展做出巨大贡献。
