Filtration Filtech 1995.pdf (221.97 kB)
Download fileInfluence of particulate and process variables in compressible cake filtration
conference contribution
posted on 07.12.2009, 13:06 authored by S.A. Willmer, Steve Tarleton, Richard HoldichData are reported on particulate and process variables which influence the formation of
compressible filter cakes. Variables such as surface charge, particle size and size distribution,
filtration pressure and solids concentration have been investigated. To obtain a greater insight into
the filter cake behaviour, an electrical impedance imaging technique for determining the in-situ
solids concentration in solid/liquid mixtures has been used. Pressure leaf filtration tests of wellcharacterised
solids dispersed in aqueous media have been performed over a range of conditions
to investigate the characteristics of compressibility. The majority of the results from these tests are
shown through solids concentration profiles as functions of suspension/cake height and time, and
specific cake resistance and porosity as functions of pressure. The dependence of the
compressibility on surface charge and other variables has been found. Comparisons have been
made with the Tiller/Shirato ‘modern’ filtration theory and the difficulties highlighted.
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School
- Aeronautical, Automotive, Chemical and Materials Engineering
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- Chemical Engineering