earticle

영어

Interests on the biofuels (bioethanol, biobutanol) have increased as the alternatives to fossil fuels which could partially replace oil-derived fuels and decrease in air pollution and greenhouse gas emission. The production of bioethanol from sucrose-containing feedstocks has led to considerable debate about its sustainability. Recently, lignocellosic biomass is considered as attractive raw material for the bioethanol production because of its availability in large quantitities at low cost. However, lignocellulosic biomass is highly recalcitrant for the degradation due to the crystallinity of cellulose and its high molecular weight. Lignocellulosic biomass requires pretreatment to improve the accessibility of the cellulose to the cellulolytic enzymes prior to its fermentation. One of the principal separation problems is to recover very high yield and concentration of ethanol from yeast-based fermentation broths containing ethanol in the range of 5~10%. Pervaporation is considered as one of the most promising approaches to concentrate low concentration of bioethanol from fermentation broths. The study discusses about pervaporation membrane process for bioethanol separation and purification from lignocellulosic biomass.