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Characterization of Irreversible Fouling after Ultrafiltration of Thermomechanical Pulp Mill Process Water

Thuvander, Johan LU ; Zarebska, Agata; Helix-Nielsen, Claus and Jönsson, Ann-Sofi LU (2018) In Journal of Wood Chemistry and Technology 38(3). p.276-285
Abstract
Large volumes of wastewater with dissolved wood components are treated in wastewater treatment plants at thermomechanical pulp mills. It has been shown previously that hemicelluloses in these wastewater streams can be recovered by membrane filtration. A serious obstacle when treating lignocellulose process streams is fouling of the membranes. Fouling not only increases operating costs but also reduces the operating time of the membrane plant. When optimizing the membrane cleaning method, it is important to know which compounds cause the fouling. In this work fouling of an ultrafiltration membrane was studied. The fouling propensity of untreated process water and microfiltrated process water was compared. Fouled membranes were analyzed... (More)
Large volumes of wastewater with dissolved wood components are treated in wastewater treatment plants at thermomechanical pulp mills. It has been shown previously that hemicelluloses in these wastewater streams can be recovered by membrane filtration. A serious obstacle when treating lignocellulose process streams is fouling of the membranes. Fouling not only increases operating costs but also reduces the operating time of the membrane plant. When optimizing the membrane cleaning method, it is important to know which compounds cause the fouling. In this work fouling of an ultrafiltration membrane was studied. The fouling propensity of untreated process water and microfiltrated process water was compared. Fouled membranes were analyzed using scanning electron microscopy and attenuated total reflection Fourier transform infrared spectrometry. Acid hydrolysis of membranes exposed to untreated process water and microfiltration permeate revealed that 508 mg/m2 and 37 mg/m2 of polysaccharides, respectively, remained on the membranes even after alkaline cleaning. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Fouling, Cleaning, Ultrafiltration, Membrane Autopsy, Hemicelluloses
in
Journal of Wood Chemistry and Technology
volume
38
issue
3
pages
10 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85047944481
ISSN
0277-3813
DOI
language
English
LU publication?
yes
id
e2a257f8-ad08-4062-a712-1dbd2ef42f10
date added to LUP
2018-05-30 09:35:50
date last changed
2018-06-17 05:32:39
@article{e2a257f8-ad08-4062-a712-1dbd2ef42f10,
  abstract     = {Large volumes of wastewater with dissolved wood components are treated in wastewater treatment plants at thermomechanical pulp mills. It has been shown previously that hemicelluloses in these wastewater streams can be recovered by membrane filtration. A serious obstacle when treating lignocellulose process streams is fouling of the membranes. Fouling not only increases operating costs but also reduces the operating time of the membrane plant. When optimizing the membrane cleaning method, it is important to know which compounds cause the fouling. In this work fouling of an ultrafiltration membrane was studied. The fouling propensity of untreated process water and microfiltrated process water was compared. Fouled membranes were analyzed using scanning electron microscopy and attenuated total reflection Fourier transform infrared spectrometry. Acid hydrolysis of membranes exposed to untreated process water and microfiltration permeate revealed that 508 mg/m2 and 37 mg/m2 of polysaccharides, respectively, remained on the membranes even after alkaline cleaning.},
  author       = {Thuvander, Johan and Zarebska, Agata and Helix-Nielsen, Claus and Jönsson, Ann-Sofi},
  issn         = {0277-3813},
  keyword      = {Fouling,Cleaning,Ultrafiltration,Membrane Autopsy,Hemicelluloses},
  language     = {eng},
  month        = {05},
  number       = {3},
  pages        = {276--285},
  publisher    = {Taylor & Francis},
  series       = {Journal of Wood Chemistry and Technology},
  title        = {Characterization of Irreversible Fouling after Ultrafiltration of Thermomechanical Pulp Mill Process Water},
  url          = {http://dx.doi.org/},
  volume       = {38},
  year         = {2018},
}