Optimisation of steam pretreatment of SO2‐impregnated mixed softwoods for ethanol production

摘要: Pretreatment of mixed softwoods with SO2 impregnation and steam for production ethanol has been investigated. The optimal conditions, both sugar yield yield, to assess the effect inhibitors formed in pretreatment, have determined. parameters investigated were: concentration (1-6% (w/w) dry matter), temperature (190-230 degrees C) residence time (2-15 min). After material was separated into a solid residue filtrate. enzymatically hydrolysed 2% matter (w/w). To investigate fermentability, filtrate fermented using Saccharomyces cerevisiae. effects different are described by response-surface modelling. highest experimental 42.1 g per 100 obtained at 210 C 5.5 min time. Although fermentabilities were good all filtrates yields greater than 90% pure glucose reference solution, pretreatment clear influence on rate. (C) 1998 SCI. (Less)