Impact of bleaching on subcritical water- and Formosolv-pretreated tulip tree to enhance enzyme accessibility

详细信息    查看全文

• 作者：Aye Aye Myint ; Dae Sung Kim ; Hun Wook Lee ; Junho Yoon ; In-Gyu Choi ; Joon Weon Choi ; Youn-Woo Lee
• 关键词：Cellulose microfibrils ; Subcritical water pretreatment ; Formosolv process ; Hydrogen peroxide ; Cellulase accessibility
• 刊名：Bioresource Technology
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：145
• 期：Complete
• 页码：128-132
• 全文大小：291 K

文摘

A novel method was developed for fractionating cellulose microfibrils from forest residue (tulip tree sawdust) to enhance cellulose digestibility, particularly at minimum enzyme loadings. This method involved three main stages: selective hemicellulose solubilization by subcritical water (SCW) pretreatment, delignification of the SCW-pretreated solids using the Formosolv process, and deformylation/bleaching of the cellulose pulp with alkaline hydrogen peroxide solution. This process produced nearly 98 % white cellulose microfibrils with 23-fold higher conversion to glucose as compared to the raw substrate after 72 h of enzymatic hydrolysis. This study showed that cellulose swelling had the greatest effect on the enzymatic hydrolysis efficiency of delignified pulp obtained by the Formosolv process.