Trichoderma reesei cellulases in the bleaching of kraft pulp

Johanna Buchert, Marjatta Ranua, Matti Siika-aho, Jaakko Pere, Liisa Viikari

    Research output: Contribution to journalArticleScientificpeer-review

    22 Citations (Scopus)


    In this work the effects of individual purified cellulases of Trichoderma reesei were studied in the enzyme-aided bleaching of kraft pulps. The cellobiohydrolases I and II, when used alone, had no positive effect on the bleachability of kraft pulps. The endoglucanase I (EG I), however, acted on pulp similarly to xylanases and with an enzyme dosage of 0.1 mg/g a clear increase in pulp brightness could be observed. Due to the unspecificity of this enzyme, the viscosity of the pulp was simultaneously decreased. Of the cellulases, EG II was clearly most detrimental in reducing the pulp viscosity. Hence, the action of purified cellulases of T. reesei on pulp as a substrate differs profoundly, and all cellulases are not detrimental to the pulp properties.
    Original languageEnglish
    Pages (from-to)941-945
    Number of pages5
    JournalApplied Microbiology and Biotechnology
    Issue number6
    Publication statusPublished - 1994
    MoE publication typeA1 Journal article-refereed


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