Effect of xylanase treatment on dewatering properties of birch kraft pulp

Minna Blomstedt (Corresponding Author), Jaakko Asikainen, Annina Lähdeniemi, Timo Ylönen, Jouni Paltakari, Terhi Hakala

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

Abstract

In this study it was shown that the enzymatic removal of xylan from ECFbleached birch kraft pulp enhances the water removal from the pulp, especially in the late stages of pulp drying. The effect of xylanase treatments on dewatering was clarified by using a moving belt former (MBF), a press simulator (MTS), and an IR-drying equipment, to simulate and to measure dewatering properties on wire, press and drying sections of a paper machine. The xylanase treatment slightly increased the pulp freeness indicating improved pulp drainage properties. At the moving belt former, however, no significant changes that would indicate enhanced dewatering in forming were observed. The xylanase treatments slightly enhanced the dewatering in wet pressing and furthermore, at the thermal drying the xylanase treatment had a positive effect on the dry solid content (DSC) development, and time to reach the 95% dry solids content was reduced by up to 15%. This was also confirmed by the decrease in the fiber saturation point (FSP) values and the amount of bulk water. Our results indicate that the xylanase treatment affected the water-binding xylan in the fiber cell wall, yielding enhanced dewatering properties, without deteriorating the pulp and paper properties.
Original languageEnglish
Pages (from-to)1164-1177
Number of pages14
JournalBioResources
Volume5
Issue number2
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

Fingerprint

Kraft pulp
Dewatering
dewatering
Pulp
Xylans
Drying
Water
Infrared drying
Fibers
Drainage
water
Simulators
Cells
simulator
pulp
effect
Wire
saturation
drainage
drying

Keywords

  • Enzyme treatment
  • Xylanase
  • Fiber modification
  • Biotechnology
  • Fiber and pulp properties
  • Dewatering
  • Sheet properties

Cite this

Blomstedt, M., Asikainen, J., Lähdeniemi, A., Ylönen, T., Paltakari, J., & Hakala, T. (2010). Effect of xylanase treatment on dewatering properties of birch kraft pulp. BioResources, 5(2), 1164-1177.
Blomstedt, Minna ; Asikainen, Jaakko ; Lähdeniemi, Annina ; Ylönen, Timo ; Paltakari, Jouni ; Hakala, Terhi. / Effect of xylanase treatment on dewatering properties of birch kraft pulp. In: BioResources. 2010 ; Vol. 5, No. 2. pp. 1164-1177.
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abstract = "In this study it was shown that the enzymatic removal of xylan from ECFbleached birch kraft pulp enhances the water removal from the pulp, especially in the late stages of pulp drying. The effect of xylanase treatments on dewatering was clarified by using a moving belt former (MBF), a press simulator (MTS), and an IR-drying equipment, to simulate and to measure dewatering properties on wire, press and drying sections of a paper machine. The xylanase treatment slightly increased the pulp freeness indicating improved pulp drainage properties. At the moving belt former, however, no significant changes that would indicate enhanced dewatering in forming were observed. The xylanase treatments slightly enhanced the dewatering in wet pressing and furthermore, at the thermal drying the xylanase treatment had a positive effect on the dry solid content (DSC) development, and time to reach the 95{\%} dry solids content was reduced by up to 15{\%}. This was also confirmed by the decrease in the fiber saturation point (FSP) values and the amount of bulk water. Our results indicate that the xylanase treatment affected the water-binding xylan in the fiber cell wall, yielding enhanced dewatering properties, without deteriorating the pulp and paper properties.",
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Blomstedt, M, Asikainen, J, Lähdeniemi, A, Ylönen, T, Paltakari, J & Hakala, T 2010, 'Effect of xylanase treatment on dewatering properties of birch kraft pulp', BioResources, vol. 5, no. 2, pp. 1164-1177.

Effect of xylanase treatment on dewatering properties of birch kraft pulp. / Blomstedt, Minna (Corresponding Author); Asikainen, Jaakko; Lähdeniemi, Annina; Ylönen, Timo; Paltakari, Jouni; Hakala, Terhi.

In: BioResources, Vol. 5, No. 2, 2010, p. 1164-1177.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of xylanase treatment on dewatering properties of birch kraft pulp

AU - Blomstedt, Minna

AU - Asikainen, Jaakko

AU - Lähdeniemi, Annina

AU - Ylönen, Timo

AU - Paltakari, Jouni

AU - Hakala, Terhi

PY - 2010

Y1 - 2010

N2 - In this study it was shown that the enzymatic removal of xylan from ECFbleached birch kraft pulp enhances the water removal from the pulp, especially in the late stages of pulp drying. The effect of xylanase treatments on dewatering was clarified by using a moving belt former (MBF), a press simulator (MTS), and an IR-drying equipment, to simulate and to measure dewatering properties on wire, press and drying sections of a paper machine. The xylanase treatment slightly increased the pulp freeness indicating improved pulp drainage properties. At the moving belt former, however, no significant changes that would indicate enhanced dewatering in forming were observed. The xylanase treatments slightly enhanced the dewatering in wet pressing and furthermore, at the thermal drying the xylanase treatment had a positive effect on the dry solid content (DSC) development, and time to reach the 95% dry solids content was reduced by up to 15%. This was also confirmed by the decrease in the fiber saturation point (FSP) values and the amount of bulk water. Our results indicate that the xylanase treatment affected the water-binding xylan in the fiber cell wall, yielding enhanced dewatering properties, without deteriorating the pulp and paper properties.

AB - In this study it was shown that the enzymatic removal of xylan from ECFbleached birch kraft pulp enhances the water removal from the pulp, especially in the late stages of pulp drying. The effect of xylanase treatments on dewatering was clarified by using a moving belt former (MBF), a press simulator (MTS), and an IR-drying equipment, to simulate and to measure dewatering properties on wire, press and drying sections of a paper machine. The xylanase treatment slightly increased the pulp freeness indicating improved pulp drainage properties. At the moving belt former, however, no significant changes that would indicate enhanced dewatering in forming were observed. The xylanase treatments slightly enhanced the dewatering in wet pressing and furthermore, at the thermal drying the xylanase treatment had a positive effect on the dry solid content (DSC) development, and time to reach the 95% dry solids content was reduced by up to 15%. This was also confirmed by the decrease in the fiber saturation point (FSP) values and the amount of bulk water. Our results indicate that the xylanase treatment affected the water-binding xylan in the fiber cell wall, yielding enhanced dewatering properties, without deteriorating the pulp and paper properties.

KW - Enzyme treatment

KW - Xylanase

KW - Fiber modification

KW - Biotechnology

KW - Fiber and pulp properties

KW - Dewatering

KW - Sheet properties

M3 - Article

VL - 5

SP - 1164

EP - 1177

JO - BioResources

JF - BioResources

SN - 1930-2126

IS - 2

ER -

Blomstedt M, Asikainen J, Lähdeniemi A, Ylönen T, Paltakari J, Hakala T. Effect of xylanase treatment on dewatering properties of birch kraft pulp. BioResources. 2010;5(2):1164-1177.