纤维素科学与技术2011，Vol.19Issue(3)：1-10,10.
绿液预处理对棉秆化学成分及酶水解糖化的影响
Effects of Green Liquor Pretreatment on Chemical Compositions and Enzymatic Hydrolysis of Cotton Stalk
摘要
Abstract
Green liquor consists of sodium carbonate and sodium sulfide and is generated in chemical recovery system of a kraft mill. Cotton stalk was pretreated by green liquor （GL） at different total titrateable alkali （TTA） charge, sulfidity and temperature. The pretreated materials were hydrolyzed with different enzyme dosages to evaluate the effects of GL pretreatment on sugar yield improvement. The results show that the cooking yield drops with the increase of TTA charge. A reasonable increase of the pretreatment TTA charge and suifidity can promote the sugar conversion ratio efficiently. A strong pretreatment leads to a serious degradation of carbohydrate and lowers sugar recovery in the following enzymatic hydrolysis. In addition, cotton bark accounts for a larger proportion of cotton stalk, leading to a low final yield of total sugar hydrolysis. The conversion ratio of glucan, xylan and total sugar in cotton stalk pretreated by 16% TTA and sulfidity 32% at 120℃ reached up to 74.0%, 61.3%, and 68.5%, respectively, while cellulase load was 20 FPU/g substrates.关键词
棉秆/绿液预处理/硫化度/酶水解/糖Key words
cotton stalk/green liquor pretreatment/sulfidity/enzymatic hydrolysis/sugar分类
化学化工引用本文复制引用
王旺霞,谷峰,金永灿,张厚民,Hasan Jameel,Richard Phillips,李忠正..绿液预处理对棉秆化学成分及酶水解糖化的影响[J].纤维素科学与技术,2011,19(3):1-10,10.基金项目
国家自然科学基金资助项目 （）
江苏省高校自然科学研究重大项目（10KJA22020）. （）
