Operating charts for continuous sedimentation III: control of step inputs

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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).


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Ämnesklassifikation (UKÄ) – OBLIGATORISK

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  • Matematik
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Sidor (från-till)225-259
TidskriftJournal of Engineering Mathematics
Utgåva nummer3
StatusPublished - 2006
Peer review utfördJa