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Modelling of flocculation using a population balance equation

par Coufort, Carole;Bouyer, Denis;Liné, Alain;Haut, Benoît
Référence Chemical engineering and processing, 46, 12, page (1264-1273)
Publication Publié, 2007

Article révisé par les pairs

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Résumé :

In this paper, a model based on a Population Balance Equation (PBE) is developed. It aims at reproducing experimental floc size distributions obtained at steady state in a jar-test. The objective is to develop a simple model, based on physical phenomena, and that does not contain any adjustable parameters. Floc size distributions obtained using image analysis and a part of a Particle Image Velocimetry (PIV) device are used to develop mathematical expressions for the aggregation and breakage kernels. A critical volume beyond which breakage is of significant importance is identified and related to the hydrodynamics. Hydrodynamic sequencing allows the distribution of the daughter particles resulting from a breakage event to be established. The model is finally successfully validated against experimental results.