College of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China.
College of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, PR China.
Bioresour Technol. 2023 Oct;385:129371. doi: 10.1016/j.biortech.2023.129371. Epub 2023 Jun 20.
Dark fermentation (DF) for hydrogen (H) evolution is often limited to industrial application due to its low H yield. In this work, hydrothermal carbon microspheres (HCM) and iron modified HCM (Fe-HCM) were prepared by hydrothermal process using waste corn cob. Subsequently, HCM and Fe-HCM were used in DF for more H. The highest H yields amended with HCM and Fe-HCM at 600 mg/L were achieved to be 119 and 154 mL/g glucose (0.87 and 1.2 mol H/mol glucose), respectively, being 24% and 59% higher than that of control yield. Soluble metabolites revealed HCM and Fe-HCM promoted butyric acid-based DF. Microbial composition depicted that HCM and Fe-HCM improved the abundance level of Firmicutes from 35% to 41% and 56%, while the abundance level of Clostridium_sensu_stricto_1 rose from 25% to 38% and 51%, respectively. This provides valuable guidance for hydrothermal carbon used in biofuel production.
暗发酵（DF）用于氢气（H）的产生由于其产氢率低，通常限制在工业应用中。在这项工作中，采用水热法以废玉米芯为原料制备了水热碳微球（HCM）和铁改性水热碳微球（Fe-HCM）。随后，将 HCM 和 Fe-HCM 用于 DF 以获得更多的 H。在 600mg/L 下，添加 HCM 和 Fe-HCM 的 H 产率最高分别达到 119 和 154 mL/g 葡萄糖（0.87 和 1.2 mol H/mol 葡萄糖），比对照产率分别提高了 24%和 59%。可溶性代谢产物表明 HCM 和 Fe-HCM 促进了基于丁酸的 DF。微生物组成表明，HCM 和 Fe-HCM 分别将厚壁菌门的丰度水平从 35%提高到 41%和 56%，同时梭菌属的丰度水平从 25%提高到 38%和 51%。这为水热碳在生物燃料生产中的应用提供了有价值的指导。
