title: Deposit membrane fouling: influence of specific cake layer resistance and tangential shear stresses.
abstract: Cake fouling is the leading cause of membrane permeability decrease when filtering mixed liquor suspension containing high suspended solid concentrations. A simple model is proposed to simulate the cake resistance evolution with time by considering a macro-scale fouling linked only to the accumulation of particles on the membrane surface. This accumulation appears as the difference between the flux of deposited particles due to the filtration and the flux of particles detached from the membrane surface due to the tangential shear stresses caused by recirculation flow in the sidestream membrane bioreactor (MBR) or gas sparging close to the membrane surface for submerged MBR configuration. Two determining parameters were then highlighted: the specific cake resistance and the 'shear parameter'. Based on these parameters it is possible to predict model outputs as cake resistance and permeate flux evolution for short-time filtration periods.
authors.affiliation: Institut Européen des Membranes (IEM), Université Montpellier 2, place Eugene Bataillon, CC05, 34095 Montpellier, France E-mail: amine.charfi@ymail.com; Laboratoire de Modélisation Mathématique et Numérique dans les Sciences de l'Ingénieur, ENIT, B. P 37 Le Belvédère 1002 Tunis, Tunisia and Institut National des Sciences Appliquées et de Technologie, B. P. 676, 1080 Tunis Cedex, Tunisia.
authors.forename: A
authors.initials: A
authors.lastname: Charfi
authors.affiliation: Laboratoire de Biotechnologie de l'Environnement, INRA, UR0050, Avenue des étangs, 11100 Narbonne, France and MODEMIC Research Group, INRIA, Laboratoire de Mathématiques, Informatique et Statistique pour l'Environnement et l'Agronomie-INRA, 2 Place Viala, 34060 Montpellier, France.
authors.forename: J
authors.initials: J
authors.lastname: Harmand
authors.affiliation: Laboratoire de Modélisation Mathématique et Numérique dans les Sciences de l'Ingénieur, ENIT, B. P 37 Le Belvédère 1002 Tunis, Tunisia and Institut National des Sciences Appliquées et de Technologie, B. P. 676, 1080 Tunis Cedex, Tunisia.
authors.forename: N
authors.initials: N
authors.lastname: Ben Amar
authors.affiliation: Institut Européen des Membranes (IEM), Université Montpellier 2, place Eugene Bataillon, CC05, 34095 Montpellier, France E-mail: amine.charfi@ymail.com.
authors.forename: A
authors.initials: A
authors.lastname: Grasmick
authors.affiliation: Institut Européen des Membranes (IEM), Université Montpellier 2, place Eugene Bataillon, CC05, 34095 Montpellier, France E-mail: amine.charfi@ymail.com.
authors.forename: M
authors.initials: M
authors.lastname: Heran
mesh_terms: D019149:Bioreactors; D003198:Computer Simulation; D005374:Filtration; D005740:Gases; D008567:Membranes, Artificial; D012722:Sewage; D033081:Shear Strength; D013314:Stress, Mechanical; D013696:Temperature; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods; D018508:Water Purification / Q000379:methods
chemical_list: D005740:Gases; D008567:Membranes, Artificial; D012722:Sewage