林产化学与工业2011，Vol.31Issue(5)：48-54,7.
绿液预处理对麦草化学成分及酶水解糖化的影响
Effects of Green Liquor Pretreatment on the Chemical Compositions and Enzymatic Hydrolysis of Wheat Straw
摘要
Abstract
The effects of green liquor pretreatment on the enzymatic hydrolysis of wheat straw for production of ethanol was investigated ai different temperatures, total tiirateable alkali (TTA) charges and sulfidity. Lignin can be effectively removed with the increasing amount of TTA charge and sulfidity in GI, pretrealmenl while pulp yield drops with the increasing amount of TTA charge and sulfidity. The final pH was controlled to lie lower than 9. 5 in order to prevent the severe loss of carlwhydrales and lo ensure liltle silica dissolved in the black liquor. The pretreated materials were hydrolyzed by (he enzyme cocktail whirh was a mixture of cellulase, xylanase an β-glucosidase to evaluate the improvemenl of sugar recovery. Compared with the cellulase loading of 5 FPU/g, sugar yield was significantly increased by the loading of 10 FPU/g. After 48 h enzymatic hydrolysis under a cellulase loading of 10 FPU/g pulp, the total sugar yield of pulp prelreated by 8 % TTA and sulfidity 40% at 130 X. Was the highest among all pretreated pulps, and the highest enzymatic hydrolysis sugar recovery was 73. 1 7c . These results provided evidences lhat the enzymatic hydrolysis efficiency of wheat straw can he significantly improved by GL pretreatment.关键词
麦草/绿液/化学成分/木质素脱除率/酶水解/糖Key words
whea/straw/green liquor pretrealment/chemical compositions/lignin removal/enzymatic hydrolysis/sugar分类
化学化工引用本文复制引用
黄婷,陆青山,金永灿,谷峰,张厚民,JAMEEL Hasan,PHILLIPS Richard,李忠正..绿液预处理对麦草化学成分及酶水解糖化的影响[J].林产化学与工业,2011,31(5):48-54,7.基金项目
国家自然科学基金资助项目(31070512) （31070512）
国家重点基础研究发展计划项目(2010CB732205) （2010CB732205）
江苏省高校自然科学研究重大项目(10KJA22020) （10KJA22020）
