Journal
BIORESOURCE TECHNOLOGY
Volume 223, Issue -, Pages 40-46Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.10.034
Keywords
Bamboo; Dissolving pulp; Hemicellulose removal; Mechanical refining; Xylanase
Funding
- Lee & Man Paper Manufacturing Limited
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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 subsequent 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 treatment to produce high quality bamboo dissolving pulp. (C) 2016 Elsevier Ltd. All rights reserved.
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