Influence of membrane resistance on swelling and removal of colloidal filter cake after filtration pressure release
2020
Loginov, Maksym | Doudies, Floriane | Hengl, Nicolas | Pignon, Frédéric | Gésan-Guiziou, Geneviève | Science et Technologie du Lait et de l'Oeuf (STLO) ; Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-INSTITUT AGRO Agrocampus Ouest ; Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro) | Laboratoire Rhéologie et Procédés (LRP) ; Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP) ; Université Grenoble Alpes (UGA)
The influence of filtration membrane resistance on colloidal filter cake swelling after the filtration pressurerelease is discussed in frame of filtration-consolidation theory. It is argued that in the case of reversiblycompressible filter cake, the solid pressure relaxation can result in filtrate inflow across the membrane with thefollowing absorption by the filter cake part adjacent to the membrane surface. According to the model results, thefiltrate inflow and the filter cake swelling rates increase with decreasing of the membrane hydraulic resistance.At low membrane resistance, the swelling can result in the non-monotonous bell-like solid concentration distribution in the filter cake (solid concentration on the cake-membrane surface is lower than the maximal solidconcentration). In contrast, the filter cake swelling in the absence of filter inflow across the membrane (or thedeposit swelling on the impermeable surface) results in the monotonous decrease of the solid concentration. Thenon-monotonous solid concentration distribution can facilitate the membrane rinsing and cleaning and lead tothe filter cake removal before its complete swelling.
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