Effect of SC-CO2 pretreatment in increasing rice straw biomass conversion

被引：121

作者：

Gao, Miao ^{[1
,2
,3
]}

Xu, Feng ^{[1
,2
]}

Li, Shurong ^{[3
]}

Ji, Xiaoci ^{[1
,2
]}

Chen, Sanfeng ^{[1
,2
]}

Zhang, Dequan ^{[3
]}

机构：

[1] China Agr Univ, State Key Lab Agrobiotechnol, Beijing 100193, PR, Peoples R China

[2] China Agr Univ, Coll Biol Sci, Beijing 100193, Peoples R China

[3] Chinese Acad Agr Sci, Inst Agrofood Sci & Technol IAFST, Beijing 100193, Peoples R China

来源：

BIOSYSTEMS ENGINEERING | 2010年 / 106卷 / 04期

关键词：

CARBON-DIOXIDE; ENZYMATIC-HYDROLYSIS; WHEAT-STRAW; CELLULOSE;

D O I：

10.1016/j.biosystemseng.2010.05.011

中图分类号：

S2 [农业工程];

学科分类号：

082806 [农业信息与电气工程];

摘要：

Rice straw, pretreated with supercritical carbon dioxide (SC-CO2) at 10-30 MPa and 40-110 degrees C for 15-45 mm at a 1:1 g/g liquid: solid ratio, was analysed for glucose yield from enzymatic hydrolysis, main chemical composition, and supermolecular structure. Rice straw that was pretreated with SC-CO2 at 30 MPa and 110 degrees C for 30 min had a final glucose yield of 32.4 +/- 0.5%, compared with 27.7 +/- 0.5% for unpretreated straw, after enzymatic hydrolysis with a mixture of cellulose and beta-glucosidase. Unpretreated and pretreated rice straw differed in chemical composition, with SC-CO2 pretreatment removing some non-lignocellulose material. Scanning electron microscopy showed that pretreated rice straw had extensive anomalous porosity and lamellar structures. Also, SC-CO2 pretreatment rendered fibres relatively fluffy and soft, which enhanced cellulase enzymatic hydrolysis. (c) 2010 IAgrE. Published by Elsevier Ltd. All rights reserved.

引用

页码：470 / 475

页数：6

共 26 条

[1]

Improved enzymatic hydrolysis yield of rice straw using electron beam irradiation pretreatment [J].