Separation of dispersed substances and galactoglucomannan in thermomechanical pulp process water by microfiltration
(2011) In Separation and Purification Technology 79(1). p.43-49- Abstract
- Several valuable substances are released from wood during the production of thermomechanical pulp. These substances can be isolated and purified for use as value-added chemicals. The hemicellulose galactoglucomannan (GGM) has attracted a great deal of interest because of its possible applications as an oxygen barrier film in packaging materials, as a hydrogel in biomedical products and as an emulsion stabilizer in food and feed. In order to exploit GGM in pulp mill process water, it must be recovered at a high concentration and high purity. The first step in the purification process is the separation of GGM and dispersed substances. In this work, the influence of membrane pore size, cross-flow velocity and backpulsing on membrane... (More)
- Several valuable substances are released from wood during the production of thermomechanical pulp. These substances can be isolated and purified for use as value-added chemicals. The hemicellulose galactoglucomannan (GGM) has attracted a great deal of interest because of its possible applications as an oxygen barrier film in packaging materials, as a hydrogel in biomedical products and as an emulsion stabilizer in food and feed. In order to exploit GGM in pulp mill process water, it must be recovered at a high concentration and high purity. The first step in the purification process is the separation of GGM and dispersed substances. In this work, the influence of membrane pore size, cross-flow velocity and backpulsing on membrane performance during the microfiltration of thermomechanical pulp process water was investigated. The flux of 0.4 and 0.8 mu m membranes was lower than the flux of a 0.2 mu m membrane, and it was not possible to recover the pure water flux of the 0.4 and 0.8 mu m membranes. Increased cross-flow velocity and backpulsing had a positive effect on the flux, but only a minor influence on the retention. The mean molecular mass of GGM in the process water was 9 kg/mol. The retention was therefore expected to be <10%. However, the retention of GGM was >50%, irrespective of the operating conditions. (C) 2011 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1984709
- author
- Krawczyk, Holger LU and Jönsson, Ann-Sofi LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Thermomechanical pulp, Hemicelluloses, Galactoglucomannan, Lignin, Microfiltration
- in
- Separation and Purification Technology
- volume
- 79
- issue
- 1
- pages
- 43 - 49
- publisher
- Elsevier
- external identifiers
-
- wos:000291421200007
- scopus:79955616003
- ISSN
- 1873-3794
- DOI
- 10.1016/j.seppur.2011.03.009
- language
- English
- LU publication?
- yes
- id
- b62e1b67-9a1f-4c4b-8454-4d4edd4ca219 (old id 1984709)
- date added to LUP
- 2016-04-01 10:18:15
- date last changed
- 2023-11-24 06:16:24
@article{b62e1b67-9a1f-4c4b-8454-4d4edd4ca219,
abstract = {{Several valuable substances are released from wood during the production of thermomechanical pulp. These substances can be isolated and purified for use as value-added chemicals. The hemicellulose galactoglucomannan (GGM) has attracted a great deal of interest because of its possible applications as an oxygen barrier film in packaging materials, as a hydrogel in biomedical products and as an emulsion stabilizer in food and feed. In order to exploit GGM in pulp mill process water, it must be recovered at a high concentration and high purity. The first step in the purification process is the separation of GGM and dispersed substances. In this work, the influence of membrane pore size, cross-flow velocity and backpulsing on membrane performance during the microfiltration of thermomechanical pulp process water was investigated. The flux of 0.4 and 0.8 mu m membranes was lower than the flux of a 0.2 mu m membrane, and it was not possible to recover the pure water flux of the 0.4 and 0.8 mu m membranes. Increased cross-flow velocity and backpulsing had a positive effect on the flux, but only a minor influence on the retention. The mean molecular mass of GGM in the process water was 9 kg/mol. The retention was therefore expected to be <10%. However, the retention of GGM was >50%, irrespective of the operating conditions. (C) 2011 Elsevier B.V. All rights reserved.}},
author = {{Krawczyk, Holger and Jönsson, Ann-Sofi}},
issn = {{1873-3794}},
keywords = {{Thermomechanical pulp; Hemicelluloses; Galactoglucomannan; Lignin; Microfiltration}},
language = {{eng}},
number = {{1}},
pages = {{43--49}},
publisher = {{Elsevier}},
series = {{Separation and Purification Technology}},
title = {{Separation of dispersed substances and galactoglucomannan in thermomechanical pulp process water by microfiltration}},
url = {{http://dx.doi.org/10.1016/j.seppur.2011.03.009}},
doi = {{10.1016/j.seppur.2011.03.009}},
volume = {{79}},
year = {{2011}},
}