Particle capture models: Comparison with experimental data

Authors

  • John Matthew Kavanagh The University of Sydney
  • Claudio Carrasco The University of Sydney
  • Maria Ines Teresa The University of Sydney
  • Maryanne Riad The Univeristy of Sydney
  • Gavin Birch The University of Sydney

DOI:

https://doi.org/10.21914/anziamj.v53i0.5072

Keywords:

urban run off, sand filtration, partial differential equations

Abstract

Sand filtration is a becoming a widely used technique for the treatment of urban run off water, particularly for the capture of particulate metal pollutants. Currently the design rules for such systems are focussed on the civil engineering and hydrological aspects, whilst metal removals are typical quoted as broad percentages. The present study is the first step in developing a new design method for such systems, by comparing an established particle capture model consisting of two partial differential equations, one for particle capture and one for loading. The particle capture model was fitted to the outlet concentrations of several metal species, assuming that all particles of a particular metal are identical and have the same probability of capture. Particle loading through the column was then used as a check on the model. Whilst the particle loading results near the surface of the sand filter are typically of the right order of magnitude, the model tended to over predict loading of the particles in the mid section of the sand filter. Modelling is presented showing that the assumption of particle uniformity may be the cause of this over prediction. An example is presented where the model fails to predict the loading, highlighting the need to include dissolution and washing in future models. References
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Author Biographies

John Matthew Kavanagh, The University of Sydney

Lecturer

Claudio Carrasco, The University of Sydney

MPhil Student Chemical and Biomolecular Engineering

Maria Ines Teresa, The University of Sydney

Honours Student Chemical and Biomolecular Engineering

Maryanne Riad, The Univeristy of Sydney

Honours Student Chemical and Biomolecular Engineering

Gavin Birch, The University of Sydney

Associate Professor Geosciences

Published

2012-06-18

Issue

Section

Proceedings Engineering Mathematics and Applications Conference