Modeling and controlling clarifier–thickeners fed by suspensions with time-dependent properties
Författare
Summary, in English
A one-dimensional model of the process of continuous sedimentation in a clarifier–thickener unit is presented. The governing model is expressed as a system of two nonlinear partial differential equations for the solids volume fraction and the varying settling velocity of the solids as functions of depth and time. This model extends the well-known model for the dynamics of a flocculated suspension in a clarifier–thickener advanced by Bürger et al. (2005). Operating charts are calculated to be used for the control of steady states, in particular, to keep the sediment level and the underflow volume fraction at desired values. A numerical scheme and a simple regulator are proposed and numerical simulations are performed.
Avdelning/ar
- Matematik LTH
- Partial differential equations
- Numerical Analysis
Publiceringsår
2014
Språk
Engelska
Sidor
91-101
Publikation/Tidskrift/Serie
Minerals Engineering
Volym
62
Dokumenttyp
Artikel i tidskrift
Förlag
Pergamon Press Ltd.
Ämne
- Water Treatment
- Water Engineering
- Control Engineering
- Chemical Engineering
- Mineral and Mine Engineering
- Mathematics
- Computational Mathematics
Status
Published
Forskningsgrupp
- Partial differential equations
- Numerical Analysis
ISBN/ISSN/Övrigt
- ISSN: 0892-6875