원문정보
초록
영어
The world is in desperate need of new sources of non-petroleum base to address vital strategic, economic, and environmental problems. Thus, much research has been conducted on developing the conversion of lignocellulosic biomass-renewable carbohydrate energy to give alternative. Pretreatment of cellulosic materials is essential if we are to achieve high yields from biological operations. Pretreatment can enhance the bio-digestibility of the wastes for xylitol production and increase accessibility of the enzymes to the materials. In this study, we examined the effect of alkali pretreatment at varied temperature and enzymatic saccharification were evaluated for conversion of corn stover cellulose and hemicellulose to monomer sugars. It results in enrichment of the difficult biodegradable materials, and improves the yield of xylitol from the wastes. The maximum yield of monomeric sugars from corn stover by NaOH (1%, v/v) pretreatment and enzymatic saccharification (50℃, pH 4.5, 48 h) using cellucalst 1.5L, novozyme 188. The yield of xylitol from alkali pretreated enzyme saccharified corn stover hydrolyzate by mutation Pichia stipitis was 0.85 g with a yield of 4 g dry solid.