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Operating charts for continuous sedimentation III: control of step inputs

Diehl, Stefan LU (2006) In Journal of Engineering Mathematics 54(3). p.225-259
Abstract
The main purposes of a clarifier-thickener unit is that it should produce a high underflow concentration and a zero effluent concentration. The main difficulty in the control of the clarification-thickening process (by adjusting a volume flow) is that it is nonlinear with complex relations between concentrations and volume flows via the solution of a PDE - a conservation law with a source term and a space-discontinuous flux function. In order to approach this problem, control objectives for dynamic operation and strategies on how to meet these objectives are presented in the case when the clarifier-thickener unit initially is in steady state in optimal operation and is subjected to step input data. A complete classification of such... (More)
The main purposes of a clarifier-thickener unit is that it should produce a high underflow concentration and a zero effluent concentration. The main difficulty in the control of the clarification-thickening process (by adjusting a volume flow) is that it is nonlinear with complex relations between concentrations and volume flows via the solution of a PDE - a conservation law with a source term and a space-discontinuous flux function. In order to approach this problem, control objectives for dynamic operation and strategies on how to meet these objectives are presented in the case when the clarifier-thickener unit initially is in steady state in optimal operation and is subjected to step input data. A complete classification of such solutions is given by means of an operating chart (concentration-flux diagram). (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
thickener, control, operating charts, continuous sedimentation, step response
in
Journal of Engineering Mathematics
volume
54
issue
3
pages
225 - 259
publisher
Springer
external identifiers
  • wos:000238272400003
  • scopus:33745089598
ISSN
0022-0833
DOI
10.1007/s10665-005-7720-3
language
English
LU publication?
yes
id
3cced738-f94c-4c39-a519-d63cc8327206 (old id 406007)
date added to LUP
2007-10-02 13:24:31
date last changed
2019-04-10 01:46:07
@article{3cced738-f94c-4c39-a519-d63cc8327206,
  abstract     = {The main purposes of a clarifier-thickener unit is that it should produce a high underflow concentration and a zero effluent concentration. The main difficulty in the control of the clarification-thickening process (by adjusting a volume flow) is that it is nonlinear with complex relations between concentrations and volume flows via the solution of a PDE - a conservation law with a source term and a space-discontinuous flux function. In order to approach this problem, control objectives for dynamic operation and strategies on how to meet these objectives are presented in the case when the clarifier-thickener unit initially is in steady state in optimal operation and is subjected to step input data. A complete classification of such solutions is given by means of an operating chart (concentration-flux diagram).},
  author       = {Diehl, Stefan},
  issn         = {0022-0833},
  keyword      = {thickener,control,operating charts,continuous sedimentation,step response},
  language     = {eng},
  number       = {3},
  pages        = {225--259},
  publisher    = {Springer},
  series       = {Journal of Engineering Mathematics},
  title        = {Operating charts for continuous sedimentation III: control of step inputs},
  url          = {http://dx.doi.org/10.1007/s10665-005-7720-3},
  volume       = {54},
  year         = {2006},
}