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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.
ACKNOWLEDGMENTS
The bioreactor was bought within the Bitech 95 Competition by the Polish Science Foundation. The studies were supported by the State Committee for Scientific Research, Project T08E01209.