Abstract
The paper shows the results of hydrogen peroxide and ozone bleaching with the use of laccase-mediator-system (LMS) and a combination of laccase and xylanase. The TCF bleaching of birch and pine kraft pulps before as well as after oxygen delignification is particularly effective in the following bleaching sequences: LQPZP, LZQPP and ZLQPP. The pretreatment of pulp with xylanase increases the laccase access to lignin.
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