Applied Biochemistry and Microbiology

, Volume 36, Issue 3, pp 245–249 | Cite as

Changes in the structural composition of hardwood kraft pulp during bleaching

  • G. P. Aleksandrova
  • S. A. Medvedeva
  • A. P. Sinitsyn
  • O. N. Okunev


The possibility of using xylanase preparations for hydrolyzing hemicelluloses in a non-bleached kraft pulp in order to facilitate its bleaching was studied. The effects of enzymatic preparations of fungal and bacterial origins were examined, and the optimal conditions for xylanase activity were determined. UV spectroscopy demonstrated that the treatment of kraft pulp with enzymatic preparations containing xylanase facilitated the subsequent removal of lignin and increased the brightness by 5%. The effect of enzymatic treatment was retained in the case of peroxide bleaching. The enzymatic preparations studied are promising for the development of chlorine-free pulp bleaching technologies.


Lignin Apply Biochemistry Enzymatic Preparation Enzymatic Treatment Xylanase Activity 
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Copyright information

© MAIK “Nauka/Interperiodica” 2000

Authors and Affiliations

  • G. P. Aleksandrova
    • 1
  • S. A. Medvedeva
    • 1
  • A. P. Sinitsyn
    • 2
  • O. N. Okunev
    • 3
  1. 1.Institute of Organic Chemistry, Siberian DivisionRussian Academy of SciencesIrkutskRussia
  2. 2.Moscow State UniversityMoscowRussia
  3. 3.Skrjabin Institute of Biochemistry and Physiology of MicroorganismsRussian Academy of SciencesPushchino, Moscow oblastRussia

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