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Operating charts for continuous sedimentation II: Step responses

In English

Författare

Summary, in English

The process of continuous sedimentation of particles in a liquid has often been predicted by means of operating charts and mass-balance considerations, where the underlying constitutive assumption is the one by Kynch. Much more complex operating charts (concentration-flux diagrams) can be obtained from a one-dimensional model of an ideal continuous clarifier-thickener unit. The engineering concept of 'optimal operation' is defined generally as a special type of solution of the model equation, which is a conservation law with a source term and a space-discontinuous flux function. All qualitatively different step responses (with the unit initially in optimal operation in steady state) are presented and classified in terms of operating charts. Quantitative information relating several interesting variables are also presented concerning, for example, the time until overflow occurs as a function of the feed concentration and flux.

Avdelning/ar

Publiceringsår

2005

Språk

Engelska

Sidor

139-185

Publikation/Tidskrift/Serie

Journal of Engineering Mathematics

Volym

53

Issue

2

Dokumenttyp

Artikel i tidskrift

Förlag

Springer

Ämne

  • Water Treatment
  • Water Engineering
  • Mathematics
  • Chemical Engineering

Nyckelord

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

Status

Published

Forskningsgrupp

  • Partial differential equations

ISBN/ISSN/Övrigt

  • ISSN: 0022-0833