2026-04-16T05:40:05Zhttps://repository.lib.bcit.ca/oai/requestoai:repository.lib.bcit.ca:node-17912025-05-12T18:20:41Znode:32oai_pmh:all_repository_itemsTreatment of douglas-fir heartwood thermomechanical pulp with laccases: effect of treatment conditions on peroxide bleaching
Douglas-fir heartwood thermomechanical pulp was treated with laccase enzymes at 25 and 50°C with and without added oxygen. The treated pulps were cleached with hudrogen peroxide at increasing alkali charges. Laccase treatments without added oxygen increased bleached brightness by 1.5-2.5 pts ISO, and decreased hydrogen peroxide consumption by 15-20%. The enzyme treatments were not enhanced when supplemented with oxygen. When the effectiveness of four different laccase enzymes was compared for the treatment of Douglas-fir heartwood thermomechanical pulp, there were no significant differences found in the performance among the enzymes. Possible explanations for the observed results are given.,Peer reviewed,Published.
2007
ISSN: 02277-3813
doi: 10.1080/02773810701486709
English
Beatson, Rodger
Chandra, Richard P.
Saddler, John N.
Taylor & Francis Group, LLC
Text
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