Exploring the effects of treatments with carbohydrases to obtain a high-cellulose content pulp from a non-wood alkaline pulp

Carbohydrate Polymers
Facundo BeltraminoM Blanca Roncero

Abstract

In this work, treatments with a xylanase (X) and carbohydrases mixture (Cx) were applied on a TCF bleached sisal pulp in order to obtain high-cellulose content fibers applicable on a wide range of uses. A limit of ≈12% w/w final content in hemicelluloses was found regardless of the enzymatic treatment assessed. An extraction with 4% and 9% w/v NaOH was performed for further hemicelluloses removal. We found that NaOH dose could be strongly reduced if combined with Cx or Cx+X treatments. Also, if necessary, a stronger reduction could be obtained with 9% w/v NaOH, which was found to be boosted in a 14% if performed after a treatment with Cx. An end-product with a low content in xylans (≈2.9% w/w) and in HexA (5.8μmol/odp) was obtained. Pulp Fock solubility was also increased (≈30%) by enzymatic treatments. HPLC analysis of effluents provided useful information of enzymatic catalytic mechanisms.

References

May 5, 2005·Journal of Industrial Microbiology & Biotechnology·Gunnar HenrikssonRoland Agnemo
Sep 11, 2007·Bioresource Technology·Li ZhuMark T Holtzapple
Nov 29, 2008·Bioresource Technology·Cristina Valls, M Blanca Roncero
Jan 16, 2010·Bioresource Technology·Edith M CadenaAntonio L Torres
Oct 13, 2010·Bioresource Technology·Cristina VallsM Blanca Roncero
Sep 3, 2011·Science·Kiyohiko IgarashiMasahiro Samejima
Aug 4, 2012·Bioresource Technology·Junhua ZhangLiisa Viikari
May 26, 2015·Bioresource Technology·Jianguo LiYonghao Ni

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