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Obtaining biobleached eucalyptus cellulose fibres by using various enzyme combinations

Carbohydrate polymers, 2013-01, Vol.92 (1), p.276 [Peer Reviewed Journal]

Copyright © 2012 Elsevier Ltd. All rights reserved. ;info:eu-repo/semantics/openAccess ;ISSN: 0144-8617 ;EISSN: 1879-1344 ;DOI: 10.1016/j.carbpol.2012.08.083 ;PMID: 23218295

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Title:
Obtaining biobleached eucalyptus cellulose fibres by using various enzyme combinations
Author: Valls, Cristina ; Cadena, Edith M ; Blanca Roncero, M
Subjects: Barbiturates - chemistry ; Blanqueig ; Blanqueig de pastes ; Cellulase - chemistry ; Cellulose ; Cellulose - chemistry ; Cellulose fibers ; Cel·lulosa ; Dyes and dyeing ; Endo-1,4-beta Xylanases - chemistry ; Enginyeria paperera ; Eucalyptus - chemistry ; Gallic Acid - analogs & derivatives ; Gallic Acid - chemistry ; Laccase - chemistry ; Lignin - chemistry ; Pasta paperera ; Primeres matèries papereres ; Química ; Àrees temàtiques de la UPC
Is Part Of: Carbohydrate polymers, 2013-01, Vol.92 (1), p.276
Description: Various combinations of laccases, xylanase and cellulase were used to biobleach cellulose fibres from eucalyptus. The Trametes villosa and Myceliophthora thermophila laccases were used in combination with violuric acid (VA(TvL) system) and methyl syringate (MeS(MtL) system), respectively, as mediator. A dissimilar mode of action of the two systems was found: the VA(TvL) treatment released both hexenuronic acids and lignin, whereas the MeS(MtL) released lignin alone. Pulp properties were further improved by applying the mediator before the enzyme during treatment. Pulp properties comparable to those provided by industrial TCF sequences were obtained by inserting a xylanase pretreatment before VA(TvL), but no significant effect was observed after the cellulase pretreatment. As an added value, the resulting enzymatically bleached fibres possess a reduced hexenuronic acid content. The chemical oxygen demand of the effluents from each stage was also assessed.
Publisher: England
Language: English
Identifier: ISSN: 0144-8617
EISSN: 1879-1344
DOI: 10.1016/j.carbpol.2012.08.083
PMID: 23218295
Source: Recercat

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Obtaining biobleached eucalyptus cellulose fibres by using various enzyme combinations

Copyright © 2012 Elsevier Ltd. All rights reserved. ;info:eu-repo/semantics/openAccess ;ISSN: 0144-8617 ;EISSN: 1879-1344 ;DOI: 10.1016/j.carbpol.2012.08.083 ;PMID: 23218295

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