Effect of enzyme pretreatment on ozone bleaching

The effect of enzyme pretreatment on ozone and chlorine-based bleaching of kraft-oxygen pulp from radiata pine was studied in the laboratory. Pretreatment conditions with Pulpzyme HA, a xylanolytic preparation from Novo-Nordisk a/s, were optimized separately for both ZED and (DC)ED bleaching. The pr...

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Bibliographic Details
Published in:Tappi journal 1994-07, Vol.77 (7), p.127-134
Main Authors: Allison, R.W, Clark, T.A
Format: Article
Language:English
Subjects:
Applied sciences
BLANCHISSEMENT
BLANQUEADURA
BLEACHING
ENZIMAS
ENZYME
ENZYMES
Exact sciences and technology
INDUSTRIA DE LA PASTA Y EL PAPEL
INDUSTRIE DE PATE ET PAPIER
OXYGEN PULPING
OZONE
OZONO
Paper, paperboard, non wovens
PINUS RADIATA
Polymer industry, paints, wood
PULP AND PAPER INDUSTRY
Pulp manufacturing
Wood. Paper. Non wovens
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Summary:The effect of enzyme pretreatment on ozone and chlorine-based bleaching of kraft-oxygen pulp from radiata pine was studied in the laboratory. Pretreatment conditions with Pulpzyme HA, a xylanolytic preparation from Novo-Nordisk a/s, were optimized separately for both ZED and (DC)ED bleaching. The presence of cellulase activity in the preparation caused significant cellulose degradation under some pretreatment conditions, particularly low pH and temperature. At optimum pretreatment conditions, bleaching effectiveness for both sequences was improved about 25% while bleaching selectivity was unaffected.
ISSN:0734-1415