Wang, Z.; Lv, Z.; Du, J.; Mo, C.; Yang, X.; Tian, S.
초록
A combined process was designed for the co-production of ethanol and methane from unwashed steam-exploded corn stover. A terminal ethanol titer of 69.8g/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 320mLCH<SUB>4</SUB>/g volatile solids (VS) with a maximum VS reduction efficiency of 55.3%. The calculated overall product yield was 197g ethanol+96gmethane/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.