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Hemicellulases in the bleaching of chemical pulps

  • A. Suurnäkki
  • M. Tenkanen
  • J. Buchert
  • L. Viikari
Chapter
Part of the Advances in Biochemical Engineering/Biotechnology book series (ABE, volume 57)

Abstract

Hemicellulase-aided bleaching is the first full-scale biotechnical application in the pulp and paper industry which truly exploits the unique specificity and safety of biocatalysts. Hemicellulases are used to modify the structure of xylan and glucomannan in pulp fibers in order to enhance the chemical delignification. This technology can be combined with various types of kraft pulping processes and bleaching sequences. The aims of the enzymatic treatment depend on the actual mill conditions, and may be related to environmental demands, reduction of chemical costs, or maintenance or even improvement of product quality. The technology is applied on the mill scale in several countries. This review describes the principles of the enzyme-aided bleaching, the composition of the fiber substrates, the basic enzymology involved, and the present knowledge of the mechanisms of the action of enzymes, as well as the practical results and advantages obtained on the laboratory and industrial scale.

Keywords

Kraft Pulp Kappa Number Chlorine Dioxide Residual Lignin Pulp Bleaching 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 0223 0247 V 2 1997

Authors and Affiliations

  • A. Suurnäkki
    • 1
  • M. Tenkanen
    • 1
  • J. Buchert
    • 1
  • L. Viikari
    • 1
  1. 1.VTT Biotechnology and Food ResearchVTTFinland

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