Co-production of oligosaccharides and fermentable sugar from wheat straw by hydrothermal pretreatment combined with alkaline ethanol extraction

被引：103
作者：
Chen, Xue [1 ]
Li, Hanyin [1 ]
Sun, Shaoni [1 ]
Cao, Xuefei [1 ,2 ]
Sun, Runcang [1 ]
机构：
[1] Beijing Forestry Univ, Beijing Key Lab Lignocellulos Chem, Beijing 100083, Peoples R China
[2] Beijing Forestry Univ, MOE Engn Res Ctr Forestry Biomass Mat & Bioenergy, Beijing 100083, Peoples R China
来源：
INDUSTRIAL CROPS AND PRODUCTS | 2018年 / 111卷
基金：
中国国家自然科学基金;
关键词：
Wheat straw; Hydrothermal pretreatment; Oligosaccharides; Enzymatic hydrolysis; ENZYMATIC-HYDROLYSIS; STRUCTURAL-CHARACTERIZATION; XYLO-OLIGOSACCHARIDES; BIOETHANOL PRODUCTION; CELLULOSE; LIGNIN; POLYSACCHARIDES; HEMICELLULOSES; LIGNOCELLULOSE; FRACTIONATION;
D O I：
10.1016/j.indcrop.2017.10.014
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Co-production of high value-added oligosaccharides and fermentable sugar from wheat straw is very attractive. In this study, hydrothermal pretreatment combined with alkaline ethanol extraction was developed to pretreat wheat straw for the production of both oligosaccharides and fermentable sugar. The major products in the hydrolysate and the enzymatic digestibility of the remaining residue were evaluated. Results showed that xylooligosaccharides (XOS) and gluco-oligosaccharides (GluOS) were the major products in the hydrolysate, and a maximum XOS yield of 61.69 g/kg wheat straw was achieved as the wheat straw was hydrothermally pretreated at 180 degrees C for 0.5 h. The HSQC results revealed that the degraded product in the hydrolysate was mainly (1 -> 4)-beta-D-xylan attached with a-D-arabinose, 4-O-methyl-D-glucuronic acids, and/or acetyl group. Additionally, the enzymatic hydrolysis rate of the cellulose-rich fractions obtained from the combined treatment process was enhanced 1.5 and 3.5 times, respectively, than that of the hydrothermally pretreated and raw wheat straw.
引用
收藏
页码：70 / 77
页数：8
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