Bioethanol Production from Various Plant Materials via Solid-state Fermentation

This study aims to promote the effective use of nonedible biomass in SSF by (1) selecting the types and combinations of enzymes suitable for and of (2) conducting laboratory-scale SSF experiments using plant material, biomass-degrading and fermentation microorganisms to investigate and examine the conversion efficiencies using ethanol as an (3) investigating the feasibility and (4) evaluating the Abstract Previously, we have reported a novel bioethanol production system based on solid-state fermentation (SSF) and forage rice, which is used in a silage-making process. In this study, we evaluated the productivity of valuable materials via SSF using various plant materials other than forage rice. Italian ryegrass, sorghum, cassava, and other plant materials are also promising for SSF. Laboratory-scale SSF experiments using raw materials of Italian ryegrass yielded a maximum of 99 mg/g of dry matter of ethanol and other valuable materials (organic acids and soluble sugars). The conversion rates were almost the same as that of the forage rice. The nutritional value of the fermented products as livestock feed either improved or was similar to that of silage.