Effect of Acetic Acid Pretreatment on the Enzymatic Hydrolysis of Rice Straw
The effects of acetic acid (HAc) pretreatment on the chemical compositions and enzymatic hydrolysis of rice straw were investigated. The contents of Klason lignin and SiO2 are little removed when acetic acid is increased from 0 to 4％ at 160℃. The acid soluble lignin and the ash content are not obviously affected by the dosage of acetic acid. About 60％ acid soluble lignin and 30％ ash dissolve during HAc pretreatment. The degradation of polysaccharides, especially hemicellulose goes up in step with the dosage of acetic acid. The result of enzymatic hydrolysis indicates that the increase of acetic acid in pretreatment does not help improving the sugar recovery of rice straw. The effect of auto-hydrolysis on enzymatic saccharification is better than that of acetic acid pretreatment under the same temperature. Auto-hydrolysis pretreatment of rice straw obtains the maximum of final sugar recovery with a cellulase loading of 40 FPU/g substrate, which are 67.8％, 45.3％ and 58.8％ respectively for glucan, xylan and total sugar.
rice straw acetic acid pretreatment chemical compositions enzymatic hydrolysis
Wang-xia WANG Lei JING 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
194-200
2010-10-22（万方平台首次上网日期，不代表论文的发表时间）