Enhancing enzymatic hydrolysis yield of sweet sorghum straw polysaccharides by heavy ion beams irradiation pretreatment

被引：22
|
作者：
Xu, Fuqiang [1 ,2 ]
Wang, Junkai [3 ]
Dong, Miaoyin [1 ,2 ]
Wang, Shuyang [1 ,2 ]
Xiao, Guoqing [1 ,2 ]
Li, Qiaoqiao [1 ,2 ]
Chen, Jihong [1 ,2 ]
Li, Wenjian [1 ,2 ]
Hu, Wei [1 ,2 ]
Liu, Jing [1 ,2 ]
机构：
[1] Chinese Acad Sci, Inst Modern Phys, 509 Nanchang Rd, Lanzhou 730000, Gansu, Peoples R China
[2] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
[3] Northwest Normal Univ, Coll Phys, Anning Rd, Lanzhou 730000, Gansu, Peoples R China
来源：
CARBOHYDRATE POLYMERS | 2019年 / 222卷
基金：
中国国家自然科学基金;
关键词：
Heavy ion beams irradiation; Crystallinity index; Polymorphs; Surface ultrastructure; Enzymatic hydrolysis yield; Sweet sorghum straw polysaccharides; LIGNOCELLULOSIC BIOMASS; CORN STOVER; CELLULOSE CRYSTALLINITY; BIOETHANOL PRODUCTION; ETHANOL-PRODUCTION; SUGAR YIELD; RICE STRAW; DIGESTIBILITY; ACID; SACCHARIFICATION;
D O I：
10.1016/j.carbpol.2019.114976
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A deeper understanding of the pretreatment process of lignocellulosic biomass could enhance the production efficiency of biofuels. Sweet sorghum straws (SSS) were subjected to heavy ion beams irradiation (HIBI) pretreatment and then hydrolyzed with 2.4 FPU of cellulase. Notably, the pretreatment has been proved to increase enzymatic digestibility of SSS. The reducing sugar yield and hydrolysis yield of SSS pretreated by 600 Gray (Gy) of HIBI reached to 7.23 mg/mL and 34.43% for 36 h, respectively, which was significantly higher than that of the untreated SSS (4.93 mg/mL of reducing sugar and 23.47% of hydrolysis yield). Additionally, the analysis of pretreated SSS showed that the destruction of amorphous region and surface ultrastructure as well as the transformation of polymorphs (I-alpha -> I-beta) of cellulose I were major effects on SSS by HIBI pretreatment. The results demonstrated that HIBI could be chosen as an effective physical pretreatment process for enhancing enzymatic hydrolysis yield of lignocellulosic biomass.
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页数：8
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