Fouling Colloids During Microporous Alumina Membrane Filtration of Wine |
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| Authors: | M.-P. BELLEVILLE J.-M. BRILLOUET B. TARODO DE LA FUENTE M. MOUTOUNET |
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| Affiliation: | Authors Belleville, Brillouet, and Moutounet are affiliated with Institut National de la Recherche Agronomique, Institut des Produits de la Vigne, Laboratoire des Polymères et des Techniques Physico-Chimiques, 2 place Viala, 34060 Montpellier Cedex 1 (France).;Author Tarodo de la Fuente is with the Laboratoire de Technologie Alimentaire, Universitédes Sciences et Techniques du Languedoc, Place Eugène Bataillon, Montpellier (France). |
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| Abstract: | Three different wines, from the same cultivar, were microfiltered using a device operating under static conditions and equipped with a section of monochanelled tubular alumina membrane, pore size 0.2 μm. Filtration flux curves resembled permeation profiles observed in dynamic cross-flow conditions using a similar membrane. Minute amounts of colloidal material deposited on the surface and inside the membrane were isolated for the first time and characterized as mixtures of high molecular weight moderately acidic grape proteoglycans (surface deposit) and low molecular weight acidic moieties (inner deposit). These fouling colloids were likely deposited by trace amounts not detectable in crude starting wines. |
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| Keywords: | colloids wine microporous membrane alumina filtration |
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