Promotional Effect of High Temperature Pretreatment on Enzymatic Hydrolysis of Xylan into Xylooligosaccharide

The enzymatic hydrolysis residues of xylan was pretreated under high temperature from 160℃ to 180℃,then the filtrate of the pretreated suspension was enzymatically hydrolysed.Under the optimal condition of pretreatment for 30 min at 180℃,(42.54 %) of xylan residues could be decomposed efficiently and the yield of xylooligosaccharides(XOS)was 32.13 % of the total carbohydrates of the supernatant.After enzymatic hydrolysis,the yield of XOS could be up to 84.93 % of total carbohydrates of the supernatant.