Specific effects of fiber size and fiber swelling on biomass substrate surface area and enzymatic digestibility

被引：38

作者：

Ju, Xiaohui ^{[1
]}

Grego, Courtnee ^{[1
]}

Zhang, Xiao ^{[1
]}

机构：

[1] Washington State Univ, Bioprod Sci & Engn Lab, Sch Chem Engn & Bioengn, Richland, WA 99354 USA

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 144卷

基金：

美国国家科学基金会;

关键词：

Biomass recalcitrance; Enzymatic hydrolysis; Fiber size; Swelling; Surface area; PARTICLE-SIZE; HYDROLYSIS; CELLULOSE; ACCESSIBILITY; ETHANOL; PRETREATMENT; CELLULASES; EFFICIENCY;

D O I：

10.1016/j.biortech.2013.06.100

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

To clarify the specific effect of biomass substrate surface area on its enzymatic digestibility, factors of fiber size reduction and swelling changes were investigated by using poplar substrates with controlled morphological and chemical properties after modified chemical pulping. Results showed that fiber size changes had insignificant influence on enzymatic hydrolysis, although the external surface area increased up to 41% with the reduction of fiber size. Swelling changes caused by increased biomass fiber porosities after PFI refining showed a significant influence on the efficiency of enzymatic hydrolysis. It is also found that chemical properties such as xylan and lignin content can influence the swelling effect. Xylan is confirmed to facilitate substrate hydrolysability by swelling, while lignin restricts swelling effect and thus minimizes the enzyme accessibility to substrates. (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：232 / 239

页数：8

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