Treatment of douglas-fir heartwood thermomechanical pulp with laccases

Beatson, Rodger (Rodger Beatson (Rodger_Beatson)) (author)
Chandra, Richard, P. (author)
Saddler, John, N. (author)
(editor)
(translator)

Copyright © Taylor & Francis Group, LLC

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.

https://www.researchgate.net/profile/John_Saddler/publication/240547212_...