Ma Hongzhi, Peng Cheng, Jia Yan, Wang Qunhui, Tu Maobing, Gao Ming
Department of Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, People's Republic of China.
Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants, Beijing 100083, People's Republic of China.
R Soc Open Sci. 2018 Sep 5;5(9):180457. doi: 10.1098/rsos.180457. eCollection 2018 Sep.
A single-chamber microbial fuel cell (MFC) was used in this study to treat recycled stillage obtained from food waste ethanol fermentation. Corresponding substrates inside the system were evaluated by fluorescence spectra, and microbial communities were also investigated. Results demonstrated that output voltage and current, respectively, reached 0.29 V and 1.4 mA with an external resistance of 200 Ω. Corresponding total organic carbon and chemical oxygen demand removal efficiency reached more than 50% and 70%, respectively. Results of fluorescence spectra demonstrated that tryptophan-like aromatic, soluble microbial by-product-like and humic acid-like substances accumulated and were not easily degraded. Microbial community analysis by high-throughput sequence indicated that and occupied the highest proportion among all genera at the anode instead of . These results may be due to complicated accumulated stillage, and potential tetracyclines possibly influenced microbial communities. Details on how stillage affects MFC operation should be further studied, and a solution on relieving effects should be established.
本研究采用单室微生物燃料电池（MFC）处理从食物垃圾乙醇发酵中获得的回收釜馏物。通过荧光光谱对系统内相应的底物进行了评估，并对微生物群落也进行了研究。结果表明，在外电阻为200Ω时，输出电压和电流分别达到0.29V和1.4mA。相应的总有机碳和化学需氧量去除效率分别达到50%以上和70%以上。荧光光谱结果表明，类色氨酸芳香族物质、类可溶性微生物副产物和类腐殖酸物质积累且不易降解。高通量测序的微生物群落分析表明，在阳极所有属中，[具体属名1]和[具体属名2]占比最高，而不是[具体属名3]。这些结果可能归因于复杂的积累釜馏物，潜在的四环素可能影响了微生物群落。关于釜馏物如何影响MFC运行的细节应进一步研究，并应建立缓解影响的解决方案。
