College of Life Science, Capital Normal University, Beijing 100048, China.
College of Life Science, Capital Normal University, Beijing 100048, China.
Bioresour Technol. 2014 Aug;166:282-7. doi: 10.1016/j.biortech.2014.05.044. Epub 2014 May 24.
A combined process was designed for the co-production of ethanol and methane from unwashed steam-exploded corn stover. A terminal ethanol titer of 69.8 g/kg mass weight (72.5%) was achieved when the fed-batch mode was performed at a final solids loading of 35.5% (w/w) dry matter (DM) content. The whole stillage from high-solids ethanol fermentation was directly transferred in a 3-L anaerobic digester. During 52-day single-stage digester operation, the methane productivity was 320 mL CH₄/g volatile solids (VS) with a maximum VS reduction efficiency of 55.3%. The calculated overall product yield was 197 g ethanol + 96 g methane/kg corn stover. This indicated that the combined process was able to improve overall content utilization and extract a greater yield of lignocellulosic biomass compared to ethanol fermentation alone.
联合工艺设计用于从未经洗涤的蒸汽爆破玉米秸秆中共同生产乙醇和甲烷。当采用分批进料模式，终末固体负荷为 35.5%（w/w）干物质（DM）含量时，终端乙醇浓度达到 69.8 g/kg 质量（72.5%）。高固体乙醇发酵的整个酒糟直接转移到 3-L 厌氧消化器中。在 52 天的单级消化器运行中，甲烷产率为 320 mL CH₄/g 挥发性固体（VS），最大 VS 还原效率为 55.3%。计算的总产物产率为 197 g 乙醇+96 g 甲烷/玉米秸秆。这表明与单独进行乙醇发酵相比，联合工艺能够提高整体含量利用率，并从木质纤维素生物质中提取更高的产量。
