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Surface coverage of filter medium in deep bed filtration : mathematical modelling and experiments

journal contribution
posted on 2000-01-01, 00:00 authored by Veeriah Jegatheesan, S Vigneswaran
This paper highlights the importance of surface coverage in modeling the removal of particles in deep bed filtration. A model that considers the saturation of sites on which particle deposition occurs is used. Experimental results obtained with monodispersed suspensions of 0.46 and 0.816 μm latex particles at different influent concentrations and ionic strengths were used to calculate the fraction of filter grain surface (β1) on which actual particle deposition occurs. This will be useful in evaluating the filter performance in terms of the utilization of available surface area of the filter medium. Further, the level of dendrite formation of particles on filter grains during filtration is expressed in terms of β1 and the specific surface coverage, θT (the fraction of a filter grain surface that is covered by particles at time T, assuming that the filter grain is covered by a monolayer of particles). This can be used to compare the contribution of deposited particles in the removal efficiency of deep bed filtration for suspensions with different physical and chemical characteristics.

History

Journal

Separation science and technology

Volume

35

Issue

7

Pagination

967 - 987

Publisher

Taylor & Francis

Location

Philadelphia, Pa.

ISSN

0149-6395

eISSN

1520-5754

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal; C Journal article

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