Invited Paper
Modelling Of Settling Tanks - A Critical Review
Author(s)
A.I. Stamou
Abstract
Modelling of settling tanks started in 1905, when Hazen presented his simple
one-dimensional laminar flow model with single-sized solid particles. In the
period 1904-1967 simple theoretical models were developed, which assumed a
simplified (e.g. a uniform) flow pattern. Between 1967 and 1977 empirical
models followed, which correlated removal efficiency with important design
parameters. Since 1976 advanced, two-dimensional, numerical models have been
developed. These model have been applied to settling tanks with increasing
geometrical and process complexity, ranging from simple rectangular tanks
without density effects to tanks with complicated geometries with inlet
deflectors, inlet vanes, sludge hoppers and density effects. Future models for
settling tanks are expected to
Keywords
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