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Assessment of various commercial enzymes in the bleaching of radiata pine kraft pulps

Journal of biotechnology, 1995-01, Vol.40 (3), p.163-168 [Peer Reviewed Journal]

1995 INIST-CNRS ;ISSN: 0168-1656 ;EISSN: 1873-4863 ;DOI: 10.1016/0168-1656(95)00048-U ;CODEN: JBITD4

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Title:
Assessment of various commercial enzymes in the bleaching of radiata pine kraft pulps
Author: Vicuna, R ; Oyarzun, E ; Osses, M
Subjects: biobleaching ; Biological and medical sciences ; Biotechnology ; bleaching ; cartazyme ; chlorine dioxide ; ecopulp ; enzyme activity ; Enzyme engineering ; Fundamental and applied biological sciences. Psychology ; irgazyme ; kraft pulping ; Methods. Procedures. Technologies ; Miscellaneous ; O-glycoside hydrolases ; Pinus radiata ; pulpzyme hb ; strength ; wood pulp ; xylanase
Is Part Of: Journal of biotechnology, 1995-01, Vol.40 (3), p.163-168
Description: Four xylanase preparations that are commercially available, namely Cartazyme from Sandoz, Ecopulp from Alko-ICI, Irgazyme from Ciba-Genencor and Pulpzyme HB from Novo Nordisk, were tested in bleaching experiments of kraft pulps from Pinus radiata. The main objective of this study was to optimize a reduction in the consumption of chlorine dioxide in the bleaching sequences C90/D10EoDED, C70/D30EoDED and D100EDED. Enzymatic treatments led to savings of ClO2 between 3.5 and 3.9 kg per air-dried tons (ADT) in the three bleaching sequences, without affecting the target brightness of the pulps. In these assays, some minor although reproducible differences in the performance of the enzymes were observed. In most cases, xylanase treatment partially affected the beatability of the pulps, measured as the number of revolutions in the PFI mill required to reach the same tensile index as the respective controls.
Publisher: Lausanne: Elsevier
Language: English
Identifier: ISSN: 0168-1656
EISSN: 1873-4863
DOI: 10.1016/0168-1656(95)00048-U
CODEN: JBITD4
Source: Alma/SFX Local Collection

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Assessment of various commercial enzymes in the bleaching of radiata pine kraft pulps

1995 INIST-CNRS ;ISSN: 0168-1656 ;EISSN: 1873-4863 ;DOI: 10.1016/0168-1656(95)00048-U ;CODEN: JBITD4

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