Effect of Green Liquor Pretreatment on the Enzymatic Hydrolysis of Cotton Stalks
The effect of green liquor pretreatment on enzymatic saccharification of cotton stalks was investigated. The lignin removal increased with the TTA (Total Titration Alkali) charge, pretreatment temperature and sulfidity. Around half of lignin in cotton stalks was removed while cotton stalks was pretreated by GL under a condition of TTA charge 16％ and sulfidity 32％ at 140℃ for 1 hr. An enzyme cocktail which composed of cellulase, xylanase and β-glucosidase was used for the enzymatic hydrolysis of GL pretreated pulp to evaluate the improvement of enzymatic saccharificaiton. The conversion ratio of glucan, xylan and total sugar in cotton stalks pretreated by 16％ TTA and sulfidity 32％ at 120℃ reached up to 74.0％, 61.3％, and 68.5％, respectively, while cellulase loading was 20 FPU/g substrates. The result showed that, increasing the pretreatment TTA charge, sulfidity and cellulase charge can promote the sugar conversion efficiency.
cotton stalks green liquor pretreatment sulfidity enzymatic hydrolysis sugar recovery
Wang-xia WANG Yong-can JIN Hou-min CHANG Hasan Jameel Richard Phillips Zhong-zheng Li
Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Na Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University, Na Department of Wood and Paper Science, North Carolina State University, Raleigh, NC 27965,USA
国际会议
南京
英文
187-193
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）