Extraction of xylan from wood pulp and brewer's spent grain

Christiane Laine, Katariina Kemppainen, Lauri Kuutti, Antero Varhimo, Sari Asikainen, Antti Grönroos, Marjo Määttänen, Johanna Buchert, Ali Harlin

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)

Abstract

Hemicelluloses are potential raw materials for different types of biobased materials. Alkaline extraction of bleached birch kraft pulp yields pure, high molecular weight hemicellulose (xylan) and hemicellulose-poor pulp. In this work, the concentration of alkali and the extraction temperature were studied as parameters for xylan yield and mass balance in the extraction. Extraction at room temperature using 1 molar aqueous sodium hydroxide (NaOH) showed the highest value for the mass balance with 98.5 wt.% on dry matter of pulp - 16.1 wt.% xylan in the extract and 82.4 wt.% extracted pulp. Recycling of 90% of the NaOH used for the extraction was demonstrated by ultrafiltration. The ultrafiltration process is thus a highly potential tool offering an economical way to simultaneously recycle chemicals and separate products from process liquids in xylan extraction and other biorefinery processes. The concept of alkaline extraction was also demonstrated for brewer's spent grain (BSG). Arabinoxylan comprised 80% of the carbohydrates in the alkaline extract of BSG. However, the selectivity of the extraction was poor as proteins, lipids and some lignin were also efficiently extracted from BSG in alkaline conditions.
Original languageEnglish
Pages (from-to)231-237
JournalIndustrial Crops and Products
Volume70
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Fingerprint

wood pulp
spent grains
brewers grains
xylan
hemicellulose
pulp
ultrafiltration
biobased products
biorefining
kraft pulp
arabinoxylan
sodium hydroxide
extracts
Betula
alkalis
recycling
raw materials
lignin
ambient temperature
molecular weight

Keywords

  • xylan
  • birch kraft pulp
  • brewer's spent grain
  • alkaline extraction
  • sodium hydroxide
  • mass balance

Cite this

Laine, Christiane ; Kemppainen, Katariina ; Kuutti, Lauri ; Varhimo, Antero ; Asikainen, Sari ; Grönroos, Antti ; Määttänen, Marjo ; Buchert, Johanna ; Harlin, Ali. / Extraction of xylan from wood pulp and brewer's spent grain. In: Industrial Crops and Products. 2015 ; Vol. 70. pp. 231-237.
@article{84cd954040f54ec4b27066abab39233a,
title = "Extraction of xylan from wood pulp and brewer's spent grain",
abstract = "Hemicelluloses are potential raw materials for different types of biobased materials. Alkaline extraction of bleached birch kraft pulp yields pure, high molecular weight hemicellulose (xylan) and hemicellulose-poor pulp. In this work, the concentration of alkali and the extraction temperature were studied as parameters for xylan yield and mass balance in the extraction. Extraction at room temperature using 1 molar aqueous sodium hydroxide (NaOH) showed the highest value for the mass balance with 98.5 wt.{\%} on dry matter of pulp - 16.1 wt.{\%} xylan in the extract and 82.4 wt.{\%} extracted pulp. Recycling of 90{\%} of the NaOH used for the extraction was demonstrated by ultrafiltration. The ultrafiltration process is thus a highly potential tool offering an economical way to simultaneously recycle chemicals and separate products from process liquids in xylan extraction and other biorefinery processes. The concept of alkaline extraction was also demonstrated for brewer's spent grain (BSG). Arabinoxylan comprised 80{\%} of the carbohydrates in the alkaline extract of BSG. However, the selectivity of the extraction was poor as proteins, lipids and some lignin were also efficiently extracted from BSG in alkaline conditions.",
keywords = "xylan, birch kraft pulp, brewer's spent grain, alkaline extraction, sodium hydroxide, mass balance",
author = "Christiane Laine and Katariina Kemppainen and Lauri Kuutti and Antero Varhimo and Sari Asikainen and Antti Gr{\"o}nroos and Marjo M{\"a}{\"a}tt{\"a}nen and Johanna Buchert and Ali Harlin",
note = "Project code: 82735",
year = "2015",
doi = "10.1016/j.indcrop.2015.03.009",
language = "English",
volume = "70",
pages = "231--237",
journal = "Industrial Crops and Products",
issn = "0926-6690",
publisher = "Elsevier",

}

Extraction of xylan from wood pulp and brewer's spent grain. / Laine, Christiane; Kemppainen, Katariina; Kuutti, Lauri; Varhimo, Antero; Asikainen, Sari; Grönroos, Antti; Määttänen, Marjo; Buchert, Johanna; Harlin, Ali.

In: Industrial Crops and Products, Vol. 70, 2015, p. 231-237.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Extraction of xylan from wood pulp and brewer's spent grain

AU - Laine, Christiane

AU - Kemppainen, Katariina

AU - Kuutti, Lauri

AU - Varhimo, Antero

AU - Asikainen, Sari

AU - Grönroos, Antti

AU - Määttänen, Marjo

AU - Buchert, Johanna

AU - Harlin, Ali

N1 - Project code: 82735

PY - 2015

Y1 - 2015

N2 - Hemicelluloses are potential raw materials for different types of biobased materials. Alkaline extraction of bleached birch kraft pulp yields pure, high molecular weight hemicellulose (xylan) and hemicellulose-poor pulp. In this work, the concentration of alkali and the extraction temperature were studied as parameters for xylan yield and mass balance in the extraction. Extraction at room temperature using 1 molar aqueous sodium hydroxide (NaOH) showed the highest value for the mass balance with 98.5 wt.% on dry matter of pulp - 16.1 wt.% xylan in the extract and 82.4 wt.% extracted pulp. Recycling of 90% of the NaOH used for the extraction was demonstrated by ultrafiltration. The ultrafiltration process is thus a highly potential tool offering an economical way to simultaneously recycle chemicals and separate products from process liquids in xylan extraction and other biorefinery processes. The concept of alkaline extraction was also demonstrated for brewer's spent grain (BSG). Arabinoxylan comprised 80% of the carbohydrates in the alkaline extract of BSG. However, the selectivity of the extraction was poor as proteins, lipids and some lignin were also efficiently extracted from BSG in alkaline conditions.

AB - Hemicelluloses are potential raw materials for different types of biobased materials. Alkaline extraction of bleached birch kraft pulp yields pure, high molecular weight hemicellulose (xylan) and hemicellulose-poor pulp. In this work, the concentration of alkali and the extraction temperature were studied as parameters for xylan yield and mass balance in the extraction. Extraction at room temperature using 1 molar aqueous sodium hydroxide (NaOH) showed the highest value for the mass balance with 98.5 wt.% on dry matter of pulp - 16.1 wt.% xylan in the extract and 82.4 wt.% extracted pulp. Recycling of 90% of the NaOH used for the extraction was demonstrated by ultrafiltration. The ultrafiltration process is thus a highly potential tool offering an economical way to simultaneously recycle chemicals and separate products from process liquids in xylan extraction and other biorefinery processes. The concept of alkaline extraction was also demonstrated for brewer's spent grain (BSG). Arabinoxylan comprised 80% of the carbohydrates in the alkaline extract of BSG. However, the selectivity of the extraction was poor as proteins, lipids and some lignin were also efficiently extracted from BSG in alkaline conditions.

KW - xylan

KW - birch kraft pulp

KW - brewer's spent grain

KW - alkaline extraction

KW - sodium hydroxide

KW - mass balance

U2 - 10.1016/j.indcrop.2015.03.009

DO - 10.1016/j.indcrop.2015.03.009

M3 - Article

VL - 70

SP - 231

EP - 237

JO - Industrial Crops and Products

JF - Industrial Crops and Products

SN - 0926-6690

ER -