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Ultrafiltration of effluents front chlorine-free, kraft pulp bleach plants

Falth, F; Jönsson, Ann-Sofi LU and Wimmerstedt, Roland LU (2001) In Desalination 133(2). p.155-165
Abstract
Ultrafiltration has proven to be a useful technology for treating alkaline bleach plant filtrates in sulphite pulp mills. In this investigation the treatment of seven alkaline filtrates from kraft pulp mills were studied. The results include high fluxes and fair, or even good, removal of organic, as well as inorganic, substances. The flux seems to depend on the concentration of the bleach plant filtrate rather than its origin. The factor with the largest impact on flux is conductivity, i.e., the concentration of the low-molecular-weight inorganic substances. The retention of organic substances varies depending on the type of filtrate and the water management system of the mill. The retention is highest when treating filtrates from the... (More)
Ultrafiltration has proven to be a useful technology for treating alkaline bleach plant filtrates in sulphite pulp mills. In this investigation the treatment of seven alkaline filtrates from kraft pulp mills were studied. The results include high fluxes and fair, or even good, removal of organic, as well as inorganic, substances. The flux seems to depend on the concentration of the bleach plant filtrate rather than its origin. The factor with the largest impact on flux is conductivity, i.e., the concentration of the low-molecular-weight inorganic substances. The retention of organic substances varies depending on the type of filtrate and the water management system of the mill. The retention is highest when treating filtrates from the first alkaline stage from traditional ECF mills. Filtrates from modem ECF and TCF mills contain a larger fraction of low-molecular-weight substances, which are not retained as efficiently. The treatment not only reduces the organic content of the filtrates but also increases the fraction that is biodegradable. The membranes retain a rather large fraction of the multi-valent ions, while the monovalent ions are let through. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
ultrafiltration, pulp and paper mills, bleach plant effluent, fouling, retention
in
Desalination
volume
133
issue
2
pages
155 - 165
publisher
Elsevier
external identifiers
  • wos:000167483800005
  • scopus:0035835357
ISSN
1873-4464
DOI
10.1016/S0011-9164(01)00094-7
language
English
LU publication?
yes
id
8abba659-5a21-4474-b219-070c0cef2f5a (old id 3915668)
date added to LUP
2013-07-02 11:12:36
date last changed
2018-05-29 10:40:19
@article{8abba659-5a21-4474-b219-070c0cef2f5a,
  abstract     = {Ultrafiltration has proven to be a useful technology for treating alkaline bleach plant filtrates in sulphite pulp mills. In this investigation the treatment of seven alkaline filtrates from kraft pulp mills were studied. The results include high fluxes and fair, or even good, removal of organic, as well as inorganic, substances. The flux seems to depend on the concentration of the bleach plant filtrate rather than its origin. The factor with the largest impact on flux is conductivity, i.e., the concentration of the low-molecular-weight inorganic substances. The retention of organic substances varies depending on the type of filtrate and the water management system of the mill. The retention is highest when treating filtrates from the first alkaline stage from traditional ECF mills. Filtrates from modem ECF and TCF mills contain a larger fraction of low-molecular-weight substances, which are not retained as efficiently. The treatment not only reduces the organic content of the filtrates but also increases the fraction that is biodegradable. The membranes retain a rather large fraction of the multi-valent ions, while the monovalent ions are let through.},
  author       = {Falth, F and Jönsson, Ann-Sofi and Wimmerstedt, Roland},
  issn         = {1873-4464},
  keyword      = {ultrafiltration,pulp and paper mills,bleach plant effluent,fouling,retention},
  language     = {eng},
  number       = {2},
  pages        = {155--165},
  publisher    = {Elsevier},
  series       = {Desalination},
  title        = {Ultrafiltration of effluents front chlorine-free, kraft pulp bleach plants},
  url          = {http://dx.doi.org/10.1016/S0011-9164(01)00094-7},
  volume       = {133},
  year         = {2001},
}