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Isolation of hemicelluloses by ultrafiltration of thermomechanical pulp mill process water-Influence of operating conditions

Persson, Tobias LU and Jönsson, Ann-Sofi LU (2010) In Chemical Engineering Research & Design 88(12A). p.1548-1554
Abstract
Hemicelluloses could be used to replace fossil-based materials in several high-value-added products. Today, vast amounts of hemicelluloses are discharged from pulp mills all over the world as waste, but these could be isolated by membrane filtration, and utilized in various applications. In this study, the hemicellulose galactoglucomannan was isolated from process water from a thermomechanical pulp mill using ultrafiltration. The retention of hemicelluloses and lignin, and the flux and fouling of three ultrafiltration membranes (ETNA01, ETNA10 and UFX5) were studied at various operating conditions. One of the membranes (UFX5) was found to have a high hemicellulose retention (above 90%) independent of flux and pressure. With the ETNA01... (More)
Hemicelluloses could be used to replace fossil-based materials in several high-value-added products. Today, vast amounts of hemicelluloses are discharged from pulp mills all over the world as waste, but these could be isolated by membrane filtration, and utilized in various applications. In this study, the hemicellulose galactoglucomannan was isolated from process water from a thermomechanical pulp mill using ultrafiltration. The retention of hemicelluloses and lignin, and the flux and fouling of three ultrafiltration membranes (ETNA01, ETNA10 and UFX5) were studied at various operating conditions. One of the membranes (UFX5) was found to have a high hemicellulose retention (above 90%) independent of flux and pressure. With the ETNA01 membrane it was impossible to combine a high flux with high hemicellulose retention, while with the ETNA10 membrane the hemicellulose retention could be increased above 90% by running at transmembrane pressures above the critical flux. The UFX5 membrane could be used at the temperature of the process water in the pulp mill (75-85 degrees C), while the ETNA10 membrane could only withstand temperatures below 60 degrees C, increasing the cost due to the need to cool the process water. However, the susceptibility of UFX5 to fouling was much greater than for ETNA10, which would increase the cleaning cost of the UFX5 membrane. (C) 2010 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
UFX5, ETNA10, Spiral-wound membrane, Ultrafiltration, Galactoglucomannan
in
Chemical Engineering Research & Design
volume
88
issue
12A
pages
1548 - 1554
publisher
IChemE
external identifiers
  • wos:000286484900003
  • scopus:78149464183
ISSN
0263-8762
DOI
10.1016/j.cherd.2010.04.002
language
English
LU publication?
yes
id
4dade58a-015c-4526-86eb-acfe335ce9db (old id 1811500)
date added to LUP
2011-03-16 15:24:22
date last changed
2018-06-10 04:20:41
@article{4dade58a-015c-4526-86eb-acfe335ce9db,
  abstract     = {Hemicelluloses could be used to replace fossil-based materials in several high-value-added products. Today, vast amounts of hemicelluloses are discharged from pulp mills all over the world as waste, but these could be isolated by membrane filtration, and utilized in various applications. In this study, the hemicellulose galactoglucomannan was isolated from process water from a thermomechanical pulp mill using ultrafiltration. The retention of hemicelluloses and lignin, and the flux and fouling of three ultrafiltration membranes (ETNA01, ETNA10 and UFX5) were studied at various operating conditions. One of the membranes (UFX5) was found to have a high hemicellulose retention (above 90%) independent of flux and pressure. With the ETNA01 membrane it was impossible to combine a high flux with high hemicellulose retention, while with the ETNA10 membrane the hemicellulose retention could be increased above 90% by running at transmembrane pressures above the critical flux. The UFX5 membrane could be used at the temperature of the process water in the pulp mill (75-85 degrees C), while the ETNA10 membrane could only withstand temperatures below 60 degrees C, increasing the cost due to the need to cool the process water. However, the susceptibility of UFX5 to fouling was much greater than for ETNA10, which would increase the cleaning cost of the UFX5 membrane. (C) 2010 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.},
  author       = {Persson, Tobias and Jönsson, Ann-Sofi},
  issn         = {0263-8762},
  keyword      = {UFX5,ETNA10,Spiral-wound membrane,Ultrafiltration,Galactoglucomannan},
  language     = {eng},
  number       = {12A},
  pages        = {1548--1554},
  publisher    = {IChemE},
  series       = {Chemical Engineering Research & Design},
  title        = {Isolation of hemicelluloses by ultrafiltration of thermomechanical pulp mill process water-Influence of operating conditions},
  url          = {http://dx.doi.org/10.1016/j.cherd.2010.04.002},
  volume       = {88},
  year         = {2010},
}