Critical stability conditions in skimmed milk crossflow microfiltration: impact on operating modes

Abstract

diameter. During skimmed milk MF the fouling, mainly due to a deposit of casein micelles at the membrane surface, is dependent on a critical permeation flux, Jcrit, to wall shear stress, τ w ratio [2, 5]. Under this critical ratio the performance (permeability 1. INTRODUCTION Separation and concentration of casein micelles from soluble proteins of skimmed milk can be achieved by crossflow microfiltration, MF, using a 0.1 µm mean pore

Critical and sustainable fluxes: Theory, experiments and applications

“…They showed that above the "critical" flux a significant hysteresis occurred but the deviation from linearity was not made clear. The stepwise filtration procedure has been commonly used to determine "critical" filtration conditions for a variety of fluids eg Gesan-Guiziou et al [19] , Kwon et al [20] , Manttari et al [21]. An identical step-by-step procedure but regulated on the permeate flux was used by Wu et al [10].…”

“…• Gold sol : Madaeni [31] • Silica particles : [10] , [18] , Huisman et al [32] • Latex : [14] , [19] , [20] , [24] , Li et al [25] , [23] , Espinasse [33] , Kwon et al [34] , Vigneswaran et al [35] • Clays : Bacchin et al [30] , Cabassud et al [36] , Hamachi et al [37] , Kwon et al [38] Macromolecular solution • Proteins…”

“…• lactalbumin : Howell et al [39] , Vyas et al [40] • Myoglobin : [22] • γ−lactoglobulim and IgG : [39] , Chan et al [41] • lysozyme : Chan et al [42] • Bovine Serum Albumine : [10] , [41] , [42] , Chen [43] , De Zarate et al [44] • Natural Organic Matter (NOM) or humic substances : [26] , Aoustin et al [45] , Seidel et al [46] , Yuan et al [47] • Emulsion : [8] Complex fluid • Yeast cells : [10] , [22] , [25] , Chang et al [48] , Sur et al [49] • Skimmed milk : [19] , Al Akoum et al [50] , Gesan-Guiziou et al [51] , Gesan-Guiziou et al [52] , Grandison et al [53] , Youravong et al [54] • Water and waste water : Chapman et al [55] , Choksuchart et al [56] , Vera et al [57] , Vera et al [58] • Lactic acid broth : [16] , [17] , Carrere et al [59] • Bioreactors sludge : Defrance et al [11] , [12] , Bouhabila et al [60] , Chang et al [61] , Cho et al [62] , Choo et al [63] , Fane et al [64] , Gander et al [65] , Jefferson et al …”

Applications of Membrane Separation

“…Optimizing pressures and feed flow rates too can be beneficial. The critical flux concept (Gesan-Guiziou et al 2000), in which permeate flux is maintained at a level below that at which fouling occurs, is a promising idea, which has been demonstrated with milk (Youravong et al, 2003). Backflushing of some permeate into the retentate stream at intervals is a well-established method of clearing blocked pores and hence recovering flux during MF.…”

The capture and release of biomass in a high voidage fibrous microstructure: Mechanisms and shear stress levels

“…The precise mechanisms for these observations are dependent on the fluid-particle-medium system and the prevailing hydrodynamic conditions. In the practical operation of filter systems, pressure difference measurements are commonly used to stop filter runs before the onset of breakthrough [18], but it has been suggested that for some filtration systems, wall shear stress measurements show better correlation with filter performance [10].…”