Enzyme-aided bleaching of industrial softwood kraft pulps

Anna Suurnäkki, Anne Kantelinen, Johanna Buchert, Liisa Viikari

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Enzyme-aided, totally chlorine-free bleaching of different industrial softwood kraft pulps was studied using purified Trichoderma reesei xylanase and mannanase. Both xylanase and mannanase treatments were found to increase the bleachability of the pulps, depending on the cooking method used in pulp production. The effect of xylanase treatment on brightness was highest in the conventional kraft pulps and in pulps produced by extended cooking methods. Higher amounts of lignin with higher average molecular mass also could be extracted from these pulps after xylanase treatment. The enzymes were especially effective in improving the bleachability of oxygen-delignified pulps.
Original languageEnglish
Pages (from-to)111-116
Number of pages6
JournalTappi Journal
Volume77
Issue number11
Publication statusPublished - 1994
MoE publication typeA1 Journal article-refereed

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Kraft pulp
Softwoods
Bleaching
Pulp
Enzymes
Pulp cooking
Lignin
Chlorine
Molecular mass
Luminance
Oxygen

Cite this

Suurnäkki, A., Kantelinen, A., Buchert, J., & Viikari, L. (1994). Enzyme-aided bleaching of industrial softwood kraft pulps. Tappi Journal, 77(11), 111-116.
Suurnäkki, Anna ; Kantelinen, Anne ; Buchert, Johanna ; Viikari, Liisa. / Enzyme-aided bleaching of industrial softwood kraft pulps. In: Tappi Journal. 1994 ; Vol. 77, No. 11. pp. 111-116.
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Suurnäkki, A, Kantelinen, A, Buchert, J & Viikari, L 1994, 'Enzyme-aided bleaching of industrial softwood kraft pulps', Tappi Journal, vol. 77, no. 11, pp. 111-116.

Enzyme-aided bleaching of industrial softwood kraft pulps. / Suurnäkki, Anna; Kantelinen, Anne; Buchert, Johanna; Viikari, Liisa.

In: Tappi Journal, Vol. 77, No. 11, 1994, p. 111-116.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Enzyme-aided bleaching of industrial softwood kraft pulps

AU - Suurnäkki, Anna

AU - Kantelinen, Anne

AU - Buchert, Johanna

AU - Viikari, Liisa

N1 - Project code: BIO2022

PY - 1994

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N2 - Enzyme-aided, totally chlorine-free bleaching of different industrial softwood kraft pulps was studied using purified Trichoderma reesei xylanase and mannanase. Both xylanase and mannanase treatments were found to increase the bleachability of the pulps, depending on the cooking method used in pulp production. The effect of xylanase treatment on brightness was highest in the conventional kraft pulps and in pulps produced by extended cooking methods. Higher amounts of lignin with higher average molecular mass also could be extracted from these pulps after xylanase treatment. The enzymes were especially effective in improving the bleachability of oxygen-delignified pulps.

AB - Enzyme-aided, totally chlorine-free bleaching of different industrial softwood kraft pulps was studied using purified Trichoderma reesei xylanase and mannanase. Both xylanase and mannanase treatments were found to increase the bleachability of the pulps, depending on the cooking method used in pulp production. The effect of xylanase treatment on brightness was highest in the conventional kraft pulps and in pulps produced by extended cooking methods. Higher amounts of lignin with higher average molecular mass also could be extracted from these pulps after xylanase treatment. The enzymes were especially effective in improving the bleachability of oxygen-delignified pulps.

M3 - Article

VL - 77

SP - 111

EP - 116

JO - Tappi Journal

JF - Tappi Journal

SN - 0734-1415

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Suurnäkki A, Kantelinen A, Buchert J, Viikari L. Enzyme-aided bleaching of industrial softwood kraft pulps. Tappi Journal. 1994;77(11):111-116.