title: Increasing efficiency of enzymatic hemicellulose removal from bamboo for production of high-grade dissolving pulp.
abstract: 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 3h 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.
authors: Department of Chemical & Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z4, Canada.
authors: Lingfeng
authors: L
authors: Zhao
authors: Department of Chemical & Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z4, Canada. Electronic address: yuanzy87@mail.ubc.ca.
authors: Zhaoyang
authors: Z
authors: Yuan
authors: Department of Chemical & Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z4, Canada.
authors: Nuwan Sella
authors: NS
authors: Kapu
authors: Chemical & Environmental Technology, British Columbia Institute of Technology, 3700 Willingdon Ave, Vancouver, BC V5G 3H2, Canada.
authors: Xue Feng
authors: XF
authors: Chang
authors: Department of Chemical & Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z4, Canada; Chemical & Environmental Technology, British Columbia Institute of Technology, 3700 Willingdon Ave, Vancouver, BC V5G 3H2, Canada.
authors: Rodger
authors: R
authors: Beatson
authors: Department of Chemical & Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z4, Canada.
authors: Heather L
authors: HL
authors: Trajano
authors: Department of Chemical & Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6T 1Z4, Canada.
authors: D Mark
authors: DM
authors: Martinez
mesh_terms: D002482:Cellulose / Q000494:pharmacology; D043364:Endo-1,4-beta Xylanases / Q000737:chemistry*; D006868:Hydrolysis; D011134:Polysaccharides / Q000737:chemistry*; D031787:Sasa / Q000737:chemistry; D014783:Viscosity; D014934:Wood / Q000737:chemistry
chemical_list: D011134:Polysaccharides; C007916:hemicellulose; D002482:Cellulose; D043364:Endo-1,4-beta Xylanases
keywords: Bamboo; Dissolving pulp; Hemicellulose removal; Mechanical refining; Xylanase