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Particle-visualisation - a tool for determination of rise velocities

Cimbritz, Michael LU ; Jönsson, Lennart LU and la Cour Jansen, Jes LU (2004) In Water Science and Technology 50(12). p.229-236
Abstract
Particles from post denitrifying Kaldnes Moving Bed(TM) Process were studied using an optical borescope, a visualisation technique that provides opportunities for both qualitative and quantitative studies of the separation mechanism in Dissolved Air Flotation (DAF). Rise rates for particle/bubble aggregates were estimated showing great variability. Two groups of aggregates were distinguished; relatively small floes (<100 mum) with single bubble's attached rising comparatively slowly and large flocs (>100 mum) with several bubbles attached rising very fast. The high rise rates for large aggregates are discussed, possibly explained and suggested as the reason for the effective separation of large particles noticed in previous studies.... (More)
Particles from post denitrifying Kaldnes Moving Bed(TM) Process were studied using an optical borescope, a visualisation technique that provides opportunities for both qualitative and quantitative studies of the separation mechanism in Dissolved Air Flotation (DAF). Rise rates for particle/bubble aggregates were estimated showing great variability. Two groups of aggregates were distinguished; relatively small floes (<100 mum) with single bubble's attached rising comparatively slowly and large flocs (>100 mum) with several bubbles attached rising very fast. The high rise rates for large aggregates are discussed, possibly explained and suggested as the reason for the effective separation of large particles noticed in previous studies. Removal efficiency of different size categories of particles in DAF were investigated on the basis of particle size analysis indicating increased separation efficiency with increasing particle size. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
visualisation, particle, particle size analysis, DAF, particle separation, rise velocity
in
Water Science and Technology
volume
50
issue
12
pages
229 - 236
publisher
IWA Publishing
external identifiers
  • wos:000226497800031
  • pmid:15686026
  • scopus:13444274365
ISSN
0273-1223
language
English
LU publication?
yes
id
4d5b67a5-1778-4048-a978-cad8916e404c (old id 255023)
alternative location
http://www.iwaponline.com/wst/05012/wst050120229.htm
date added to LUP
2007-10-24 20:22:23
date last changed
2017-01-01 06:48:28
@article{4d5b67a5-1778-4048-a978-cad8916e404c,
  abstract     = {Particles from post denitrifying Kaldnes Moving Bed(TM) Process were studied using an optical borescope, a visualisation technique that provides opportunities for both qualitative and quantitative studies of the separation mechanism in Dissolved Air Flotation (DAF). Rise rates for particle/bubble aggregates were estimated showing great variability. Two groups of aggregates were distinguished; relatively small floes (&lt;100 mum) with single bubble's attached rising comparatively slowly and large flocs (&gt;100 mum) with several bubbles attached rising very fast. The high rise rates for large aggregates are discussed, possibly explained and suggested as the reason for the effective separation of large particles noticed in previous studies. Removal efficiency of different size categories of particles in DAF were investigated on the basis of particle size analysis indicating increased separation efficiency with increasing particle size.},
  author       = {Cimbritz, Michael and Jönsson, Lennart and la Cour Jansen, Jes},
  issn         = {0273-1223},
  keyword      = {visualisation,particle,particle size analysis,DAF,particle separation,rise velocity},
  language     = {eng},
  number       = {12},
  pages        = {229--236},
  publisher    = {IWA Publishing},
  series       = {Water Science and Technology},
  title        = {Particle-visualisation - a tool for determination of rise velocities},
  volume       = {50},
  year         = {2004},
}