Abstract
Xylanase
treatment improved the bleachability of softwood kraft pulp both in
conventional chlorine bleaching and in peroxide delignification. The
mannanase isolated from Trichoderma reesei acted differently and
improved the bleachability in the peroxide delignification significantly
more than in the chlorine bleaching. When mannanase and xylanase were
dosed together a positive effect was detected in both bleaching
sequences. The reason for the different efficiencies of these enzymatic
treatments in the bleaching may be the selectivities of the bleaching
chemicals. The mannanase could hydrolyze amounts of glucomannan
comparable to the xylan hydrolyzed by xylanase, suggesting that at least
part of both hemicelluloses are located on the surface of the fibres.
Original language | English |
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Pages (from-to) | 473 - 478 |
Number of pages | 6 |
Journal | Holzforschung |
Volume | 47 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1993 |
MoE publication type | A1 Journal article-refereed |