ANALYSING FLUX DECLINE IN DEAD-END FILTRATION

Alexia Grenier (1) , Martine Meireles (1) , Pierre Aimar (1) , Philippe Carvin (2)

1 LGC - Laboratoire de Génie Chimique
2 CRL - Rhodia Recherches CRL

Can we rely on the analysis of flux decline to evaluate the risks of a filter media to be clogged during filtration of a given particle suspension? This important issue can be dealt with a macroscopic approach described in this paper. We seek to identify and quantify the successive prevailing mechanisms which occur during a filtration run, directly and solely from experimental flux data. This is achieved from the collection of experimental data (filtrate volume V versus time t) and the use of the differential equation . A methodology is then proposed to define and validate experimental procedures with the purpose of quantifying occurring fouling mechanism. For the purpose of illustrating its valuable impact for a bench marking procedure, the methodology has been applied on a model system composed of a bentonite suspension and a series of microfiltration membranes of different structures.

Mots clés: Microfiltration; Flux decline; Blocking; Fouling mechanisms; Filter media

Domaines: Génie des procédés

Alexia Grenier, Martine Meireles, Pierre Aimar, Philippe Carvin. ANALYSING FLUX DECLINE IN DEAD-END FILTRATION. Chemical Engineering Research and Design, 2008, 86, pp.1281-1293. ⟨10.1016/j.cherd.2008.06.005⟩. ⟨hal-00329472⟩