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Disc filtration for separation of flocs from a moving bed bio-film reactor

Persson, E. ; Cimbritz, Michael LU ; la Cour Jansen, Jes LU ; Strube, R. and Jönsson, Lennart LU (2006) In Water Science and Technology 53(12). p.139-147
Abstract
A Discfilter with 10 and 18 mu m filter openings, respectively, was placed in parallel to a flotation plant for separation of biological flocs from a post-denitrifying Kaldnes Moving Bed (TM) Process, the last treatment step at the municipal wastewater treatment plant at Sjolunda, Malmo, Sweden. The effluent concentrations from the 10 and 18 mu m filter were 2-5 and 2-8 mg SS L-1, respectively, which is comparable to, or better than, the flotation plant. Comparison with experiences from activated sludge plants shows that the Discfilter works especially well after the Kaldnes process. Particle size distribution (PSD) studies show that particles larger than the filter openings of 10 and 18 mu m are separated with approximately 90%... (More)
A Discfilter with 10 and 18 mu m filter openings, respectively, was placed in parallel to a flotation plant for separation of biological flocs from a post-denitrifying Kaldnes Moving Bed (TM) Process, the last treatment step at the municipal wastewater treatment plant at Sjolunda, Malmo, Sweden. The effluent concentrations from the 10 and 18 mu m filter were 2-5 and 2-8 mg SS L-1, respectively, which is comparable to, or better than, the flotation plant. Comparison with experiences from activated sludge plants shows that the Discfilter works especially well after the Kaldnes process. Particle size distribution (PSD) studies show that particles larger than the filter openings of 10 and 18 mu m are separated with approximately 90% efficiency, whereas most of the smaller particles pass the filter. This fact indicates that the major particle separation mechanism is physical blocking. These findings point to the possibility of improving the prediction of the separation efficiency by combining measurements of turbidity and suspended solids with particle size analysis. (Less)
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
particle size, particle separation, discfilter, microscreen filtration, analysis
in
Water Science and Technology
volume
53
issue
12
pages
139 - 147
publisher
IWA Publishing
external identifiers
  • pmid:16889250
  • wos:000239543700016
  • scopus:33746523756
ISSN
0273-1223
DOI
10.2166/wst.2006.416
language
English
LU publication?
yes
id
f9c51f0d-c43e-4799-88f5-ee37a6dd57b3 (old id 398598)
date added to LUP
2016-04-01 17:10:45
date last changed
2020-12-15 02:57:43
@article{f9c51f0d-c43e-4799-88f5-ee37a6dd57b3,
  abstract     = {A Discfilter with 10 and 18 mu m filter openings, respectively, was placed in parallel to a flotation plant for separation of biological flocs from a post-denitrifying Kaldnes Moving Bed (TM) Process, the last treatment step at the municipal wastewater treatment plant at Sjolunda, Malmo, Sweden. The effluent concentrations from the 10 and 18 mu m filter were 2-5 and 2-8 mg SS L-1, respectively, which is comparable to, or better than, the flotation plant. Comparison with experiences from activated sludge plants shows that the Discfilter works especially well after the Kaldnes process. Particle size distribution (PSD) studies show that particles larger than the filter openings of 10 and 18 mu m are separated with approximately 90% efficiency, whereas most of the smaller particles pass the filter. This fact indicates that the major particle separation mechanism is physical blocking. These findings point to the possibility of improving the prediction of the separation efficiency by combining measurements of turbidity and suspended solids with particle size analysis.},
  author       = {Persson, E. and Cimbritz, Michael and la Cour Jansen, Jes and Strube, R. and Jönsson, Lennart},
  issn         = {0273-1223},
  language     = {eng},
  number       = {12},
  pages        = {139--147},
  publisher    = {IWA Publishing},
  series       = {Water Science and Technology},
  title        = {Disc filtration for separation of flocs from a moving bed bio-film reactor},
  url          = {http://dx.doi.org/10.2166/wst.2006.416},
  doi          = {10.2166/wst.2006.416},
  volume       = {53},
  year         = {2006},
}