Increasing efficiency of enzymatic hemicellulose removal from bamboo for production of high-grade dissolving pulp
Zhao, Lingfeng Yuan, Zhaoyang Sella, Nuwan Feng, Xue Beatson, Rodger Trajano, Heather L Martinez, D Mark
Bioresource Technology,223: 40-46.2017
To improve the efficiency of enzymatic hemicellulose removal from bamboo pre-hydrolysis kraft pulp, mechanical refining was conducted prior to enzyme treatment. Refining significantly improved the sub- sequent hemicellulose removal efficiency by xylanase treatment. Results showed that when PFI refining was followed by 3 h xylanase treatment, the xylan content of the bamboo pre-hydrolysis kraft pulp (after first stage oxygen delignification) could be decreased to 2.72% (w/w). After bleaching of enzyme treated pulp, the alpha-cellulose content was 93.4% (w/w) while the xylan content was only 2.38%. The effect of refining on fibre properties was investigated in terms of freeness, water retention value, fibre length and fibrillation characteristics. The brightness, reactivity and viscosity were also determined to characterize the quality of final pulp. Results demonstrated the feasibility of combining refining and xylanase treat- ment to produce high quality bamboo dissolving pulp.
https://www.sciencedirect.com/science/article/abs/pii/S0960852416314407