Production of Fuel Ethanol from Hydrotherm-pretreated Corn Stover by Pichia stipitis

摘要

Corn stover is an abundant raw material for fuel ethanol production.Finding out the appropriate process for ethanol production will be possible to achieve industrilization.Hydrothermal pretreatment (195°C,15min) and simultaneous saccharification and fermentation (SSF) were adopted to produce ethanol from corn stover.The results showed that 86.5％ of cellulose were remained in solid cake and most of hemicellulose were solubilized after pretreatment.The highest ethanol concentrationl of 12.12 g/L was achieved at initial pH of 5.5,temperature 30°C and 130 rpm shaking rate with substrate concentration of 5％(w/v) by Pichia stipitis58376 after 192 h.The corresponding volumetric productivity were 0.065g/Lh.