Effect of Green Liquor Pretreatment on the Enzymatic Hydrolysis of Wheat Straw
Green liquor (GL) pretreatment is an effective way to improve the enzymatic saccharification of fiber materials. The effects of green liquor pretreatment on the enzymatic hydrolysis of wheat straw for ethanol production was investigated at different temperatures, total titrateable alkali (TTA) charges and sulfidity. Lignin can be effectively removed with the increase of TTA charge and sulfidity in GL pretreatment while pulp yield drops with the increase of TTA charge and sulfidity. The pretreated materials were hydrolyzed by using the enzyme cocktail which was mixed by cellulose, xylanase and β-glucosidase to evaluate the improvement of sugar recovery. Compared with the cellulase of 5 FPU/g, sugar yield was significantly increased by the cellulase of 10 FPU/g. After 48 h enzymatic hydrolysis under a cellulase loading of 10 FPU/g pulp, the total sugar yield of pulp pretreated by 8％ TTA and sulfidity 40％ at 130℃ is the highest among all pretreated pulps. An enzymatic hydrolysis sugar recovery over 73％ could be achieved. The result proves that the enzymatic hydrolysis efficiency of wheat straw can be significantly improved by the GL pretreatment.
wheat straw green liquor pretreatment lignin removal enzymatic hydrolysis
Ting HUANG Feng GU Yongcan 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
180-186
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）