Separation of casein micelles from whey proteins by high shear microfiltration of skim milk using rotating ceramic membranes and organic membranes in a rotating disk module

Fractionation of pasteurized skim milk proteins by dynamic filtration

“…Numerical coefficients in Eqs. (3) and (4) are different from those reported in Espina et al (2008) due to use of methanol, instead of acetonitrile as solvent. Permeate turbidities, which characterize the transmission of casein micelles through the membrane, were measured with a Hach turbidimeter (Colorado, USA).…”

“…a-La and b-Lg concentrations in permeate and retentate were measured by HPLC samples collected at the permeate and retentate outlets of the module, according to a procedure described by Espina et al (2008). A Waters 510 chromatograph, a UV detector at 280 nm and a Vydac-C4 column thermostated at 40°C, were used according to the method of Jaubert and Martin (1992).…”

“…Recently, Espina, Jaffrin, Frappart, and Ding (2008), have shown that this module gave the best MF performance, but tests were made on UHT skim milk because of easy access and fluid reproducibility. In the present work, we have used a pasteurized skim milk provided by a dairy plant, which, unlike UHT milk, had the same whey protein composition as fresh milk and is more representative of real industrial conditions.…”

Principles of Membrane Filtration

“…However, backwashing is problematic with polymeric composite membranes, as the active membrane layer delaminates from the support layer at higher pressures from the permeate (support layer side) to the feed side. Other strategies to improve flux rates include (a) the introduction of air bubbles into the feed stream to create a highly turbulent two-phase flow creating a scouring effect (Mercier-Bonin et al ., 2003); (b) pre-treatment of the feed (remove fouling compounds); and (c) the development of rotating or vibrating membrane modules (Espina et al ., 2008).…”

Composite ceramic membranes from natural aluminosilicates for microfiltration applications

“…The interest in separation by the use of inorganic membranes has rapidly increased during the last two decades. Due to their potential application in a wide range of industrial processes such as water and effluent treatments [1][2][3][4][5], drink clarification [6][7][8], milk pasteurisation [9][10][11][12][13], biochemical processing [14,15], inorganic membrane technologies have achieved an increasing importance. Ceramic membranes have many known advantages such as high thermal and chemical stability, pressure resistance, long lifetime, and catalytic properties from their intrinsic nature [16,17].…”