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Centrifugation as pretreatment before ultrafiltration of hemicelluloses extracted from wheat bran

Thuvander, Johan LU ; Arkell, Anders LU and Jönsson, Ann-Sofi LU (2014) In Separation and Purification Technology 138. p.1-6
Abstract
Hemicelluloses recovered by alkaline extraction of wheat bran can be isolated and purified by ultrafiltration and used to produce high-value products such as barrier films for food packaging. The flux during ultrafiltration depends to a large extent on the pretreatment of the solution. It has been shown previously that dead-end filtration with kieselguhr can increase the flux during ultrafiltration. In the present study, pretreatment by centrifugation and a combination of centrifugation and dead-end filtration was compared with dead-end filtration alone. Centrifugation reduced the turbidity and viscosity of the solution but did not significantly improve the flux during ultrafiltration. The flux of the untreated and the centrifuged... (More)
Hemicelluloses recovered by alkaline extraction of wheat bran can be isolated and purified by ultrafiltration and used to produce high-value products such as barrier films for food packaging. The flux during ultrafiltration depends to a large extent on the pretreatment of the solution. It has been shown previously that dead-end filtration with kieselguhr can increase the flux during ultrafiltration. In the present study, pretreatment by centrifugation and a combination of centrifugation and dead-end filtration was compared with dead-end filtration alone. Centrifugation reduced the turbidity and viscosity of the solution but did not significantly improve the flux during ultrafiltration. The flux of the untreated and the centrifuged solutions was about 65 l/m2 h at 1 bar transmembrane pressure. The flux after dead-end filtration was 150 l/m2 h. After combining centrifugation and dead-end filtration the flux was 200 l/m2 h. In addition to the higher UF flux, filtration resistance during dead-end filtration was markedly reduced after pre-centrifugation of the solution. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Prefiltration, Centrifugation, Ultrafiltration, Viscosity, Hemicelluloses
in
Separation and Purification Technology
volume
138
pages
1 - 6
publisher
Elsevier
external identifiers
  • wos:000348013300001
  • scopus:84908317860
ISSN
1873-3794
DOI
10.1016/j.seppur.2014.10.003
language
English
LU publication?
yes
id
74c555b6-7ffd-4e9b-8079-1af15612ad2a (old id 4730485)
alternative location
http://www.sciencedirect.com/science/article/pii/S1383586614005991
date added to LUP
2014-10-28 13:55:18
date last changed
2017-01-01 03:31:56
@article{74c555b6-7ffd-4e9b-8079-1af15612ad2a,
  abstract     = {Hemicelluloses recovered by alkaline extraction of wheat bran can be isolated and purified by ultrafiltration and used to produce high-value products such as barrier films for food packaging. The flux during ultrafiltration depends to a large extent on the pretreatment of the solution. It has been shown previously that dead-end filtration with kieselguhr can increase the flux during ultrafiltration. In the present study, pretreatment by centrifugation and a combination of centrifugation and dead-end filtration was compared with dead-end filtration alone. Centrifugation reduced the turbidity and viscosity of the solution but did not significantly improve the flux during ultrafiltration. The flux of the untreated and the centrifuged solutions was about 65 l/m2 h at 1 bar transmembrane pressure. The flux after dead-end filtration was 150 l/m2 h. After combining centrifugation and dead-end filtration the flux was 200 l/m2 h. In addition to the higher UF flux, filtration resistance during dead-end filtration was markedly reduced after pre-centrifugation of the solution.},
  author       = {Thuvander, Johan and Arkell, Anders and Jönsson, Ann-Sofi},
  issn         = {1873-3794},
  keyword      = {Prefiltration,Centrifugation,Ultrafiltration,Viscosity,Hemicelluloses},
  language     = {eng},
  pages        = {1--6},
  publisher    = {Elsevier},
  series       = {Separation and Purification Technology},
  title        = {Centrifugation as pretreatment before ultrafiltration of hemicelluloses extracted from wheat bran},
  url          = {http://dx.doi.org/10.1016/j.seppur.2014.10.003},
  volume       = {138},
  year         = {2014},
}