Xylanases in bleaching: From an idea to the industry

Liisa Viikari (Corresponding Author), Anne Kantelinen, Jorma Sundquist, Matti Linko

Research output: Contribution to journalArticleScientificpeer-review

565 Citations (Scopus)

Abstract

The utilization of hemicellulases in bleaching of kraft (sulphate) pulp is considered as one of the most important new large-scale industrial applications of enzymes. This is partly due to the great potential of an environmentally safe method. This method has in a short period also proven to be economically realistic. The main enzymes needed in the enzyme-aided bleaching have been shown to belong to the group of endo-/gb-xylanases. Xylanases act mainly on the relocated, reprecipitated xylan on the surface of the pulp fibres. Enzymatic hydrolysis of this specific type of xylan renders the structure of the fibres more permeable. The hydrolysis of xylan or mannan in the inner fibre layers may also enhance the bleachability. In practical process conditions, properties of the enzymes such as substrate specificity and the pH and temperature optima are of utmost importance. The benefits obtained by enzymes are dependent on the chemical bleaching sequence used as well as on the residual lignin content of pulp. The main goals in the enzyme-aided bleaching of kraft pulps have been the reduction of consumption of chlorine chemicals in the bleaching process and consequently lowering the AOX of the effluents. Enzymes have been applied as a pretreatment both in conventional (C/D)EDED and in ECF (elementary chlorine-free) bleaching sequences. In the production of TCF (totally chlorine-free) pulps, enzymes have also been successfully used for increasing the brightness of pulp.
Original languageEnglish
Pages (from-to)335-350
Number of pages16
JournalFEMS Microbiology Reviews
Volume13
Issue number2-3
DOIs
Publication statusPublished - 1994
MoE publication typeA1 Journal article-refereed

Fingerprint

Industry
Enzymes
Xylans
Chlorine
Hydrolysis
Mannans
Lignin
Substrate Specificity
Sulfates
Temperature

Cite this

Viikari, L., Kantelinen, A., Sundquist, J., & Linko, M. (1994). Xylanases in bleaching: From an idea to the industry. FEMS Microbiology Reviews, 13(2-3), 335-350. https://doi.org/10.1111/j.1574-6976.1994.tb00053.x
Viikari, Liisa ; Kantelinen, Anne ; Sundquist, Jorma ; Linko, Matti. / Xylanases in bleaching : From an idea to the industry. In: FEMS Microbiology Reviews. 1994 ; Vol. 13, No. 2-3. pp. 335-350.
@article{d17f3bf587d34437b49d2d9f5c7993b5,
title = "Xylanases in bleaching: From an idea to the industry",
abstract = "The utilization of hemicellulases in bleaching of kraft (sulphate) pulp is considered as one of the most important new large-scale industrial applications of enzymes. This is partly due to the great potential of an environmentally safe method. This method has in a short period also proven to be economically realistic. The main enzymes needed in the enzyme-aided bleaching have been shown to belong to the group of endo-/gb-xylanases. Xylanases act mainly on the relocated, reprecipitated xylan on the surface of the pulp fibres. Enzymatic hydrolysis of this specific type of xylan renders the structure of the fibres more permeable. The hydrolysis of xylan or mannan in the inner fibre layers may also enhance the bleachability. In practical process conditions, properties of the enzymes such as substrate specificity and the pH and temperature optima are of utmost importance. The benefits obtained by enzymes are dependent on the chemical bleaching sequence used as well as on the residual lignin content of pulp. The main goals in the enzyme-aided bleaching of kraft pulps have been the reduction of consumption of chlorine chemicals in the bleaching process and consequently lowering the AOX of the effluents. Enzymes have been applied as a pretreatment both in conventional (C/D)EDED and in ECF (elementary chlorine-free) bleaching sequences. In the production of TCF (totally chlorine-free) pulps, enzymes have also been successfully used for increasing the brightness of pulp.",
author = "Liisa Viikari and Anne Kantelinen and Jorma Sundquist and Matti Linko",
note = "Project code: BIO2022",
year = "1994",
doi = "10.1111/j.1574-6976.1994.tb00053.x",
language = "English",
volume = "13",
pages = "335--350",
journal = "FEMS Microbiology Reviews",
issn = "0168-6445",
publisher = "Oxford University Press",
number = "2-3",

}

Viikari, L, Kantelinen, A, Sundquist, J & Linko, M 1994, 'Xylanases in bleaching: From an idea to the industry', FEMS Microbiology Reviews, vol. 13, no. 2-3, pp. 335-350. https://doi.org/10.1111/j.1574-6976.1994.tb00053.x

Xylanases in bleaching : From an idea to the industry. / Viikari, Liisa (Corresponding Author); Kantelinen, Anne; Sundquist, Jorma; Linko, Matti.

In: FEMS Microbiology Reviews, Vol. 13, No. 2-3, 1994, p. 335-350.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Xylanases in bleaching

T2 - From an idea to the industry

AU - Viikari, Liisa

AU - Kantelinen, Anne

AU - Sundquist, Jorma

AU - Linko, Matti

N1 - Project code: BIO2022

PY - 1994

Y1 - 1994

N2 - The utilization of hemicellulases in bleaching of kraft (sulphate) pulp is considered as one of the most important new large-scale industrial applications of enzymes. This is partly due to the great potential of an environmentally safe method. This method has in a short period also proven to be economically realistic. The main enzymes needed in the enzyme-aided bleaching have been shown to belong to the group of endo-/gb-xylanases. Xylanases act mainly on the relocated, reprecipitated xylan on the surface of the pulp fibres. Enzymatic hydrolysis of this specific type of xylan renders the structure of the fibres more permeable. The hydrolysis of xylan or mannan in the inner fibre layers may also enhance the bleachability. In practical process conditions, properties of the enzymes such as substrate specificity and the pH and temperature optima are of utmost importance. The benefits obtained by enzymes are dependent on the chemical bleaching sequence used as well as on the residual lignin content of pulp. The main goals in the enzyme-aided bleaching of kraft pulps have been the reduction of consumption of chlorine chemicals in the bleaching process and consequently lowering the AOX of the effluents. Enzymes have been applied as a pretreatment both in conventional (C/D)EDED and in ECF (elementary chlorine-free) bleaching sequences. In the production of TCF (totally chlorine-free) pulps, enzymes have also been successfully used for increasing the brightness of pulp.

AB - The utilization of hemicellulases in bleaching of kraft (sulphate) pulp is considered as one of the most important new large-scale industrial applications of enzymes. This is partly due to the great potential of an environmentally safe method. This method has in a short period also proven to be economically realistic. The main enzymes needed in the enzyme-aided bleaching have been shown to belong to the group of endo-/gb-xylanases. Xylanases act mainly on the relocated, reprecipitated xylan on the surface of the pulp fibres. Enzymatic hydrolysis of this specific type of xylan renders the structure of the fibres more permeable. The hydrolysis of xylan or mannan in the inner fibre layers may also enhance the bleachability. In practical process conditions, properties of the enzymes such as substrate specificity and the pH and temperature optima are of utmost importance. The benefits obtained by enzymes are dependent on the chemical bleaching sequence used as well as on the residual lignin content of pulp. The main goals in the enzyme-aided bleaching of kraft pulps have been the reduction of consumption of chlorine chemicals in the bleaching process and consequently lowering the AOX of the effluents. Enzymes have been applied as a pretreatment both in conventional (C/D)EDED and in ECF (elementary chlorine-free) bleaching sequences. In the production of TCF (totally chlorine-free) pulps, enzymes have also been successfully used for increasing the brightness of pulp.

U2 - 10.1111/j.1574-6976.1994.tb00053.x

DO - 10.1111/j.1574-6976.1994.tb00053.x

M3 - Article

VL - 13

SP - 335

EP - 350

JO - FEMS Microbiology Reviews

JF - FEMS Microbiology Reviews

SN - 0168-6445

IS - 2-3

ER -