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Operating charts for continuous sedimentation III: control of step inputs

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Author

Summary, in English

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).

Department/s

Publishing year

2006

Language

English

Pages

225-259

Publication/Series

Journal of Engineering Mathematics

Volume

54

Issue

3

Document type

Journal article

Publisher

Springer

Topic

  • Control Engineering
  • Mathematics
  • Chemical Engineering
  • Water Engineering
  • Water Treatment

Keywords

  • thickener
  • control
  • operating charts
  • continuous sedimentation
  • step response

Status

Published

Research group

  • Partial differential equations

ISBN/ISSN/Other

  • ISSN: 0022-0833