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Study of the fouling of a mineral microfiltration membrane using scanning electron microscopy and physicochemical analyses in the processing of milk

Published online by Cambridge University Press:  01 June 2009

Claudine Vetier ,
Michel Bennasar  and
Blas Tarodo de la Fuente
Claudine Vetier
Affiliation:
Laboratoire de Technologie Alimentaire, Groupe de Recherche et de Développement sur les Membranes, Université des Sciences et Techniques du Languedoc, 34060 Montpellier, France
Michel Bennasar
Affiliation:
Laboratoire de Technologie Alimentaire, Groupe de Recherche et de Développement sur les Membranes, Université des Sciences et Techniques du Languedoc, 34060 Montpellier, France
Blas Tarodo de la Fuente
Affiliation:
Laboratoire de Technologie Alimentaire, Groupe de Recherche et de Développement sur les Membranes, Université des Sciences et Techniques du Languedoc, 34060 Montpellier, France
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Summary

Soluble proteins and Ca and P salts in the fouling deposit on a mineral microfiltration membrane obtained in static conditions were analysed and compared with those found using dynamic filter conditions in a laboratory pilot installation for milk processing. The serum milk proteins were retained by the porous micellar deposit under both static and dynamic conditions, resulting in progressive fouling of the dynamic micellar membrane, enabling milk to be processed with a mineral microfiltration membrane. Ca and P salts increased fouling probably by allowing better adsorption of casein micelles on the alumina and by acting as intermicellar bonds in the deposit. Fat globules modified porosity, permeability and resistance to matter transfer of the deposit. The dynamic conditions gave a deposit of the same type and structure as with the static conditions although made thinner by the velocity effect.

Type
Original articles
Information
Journal of Dairy Research , Volume 55 , Issue 3 , August 1988 , pp. 381 - 400
Copyright
Copyright © Proprietors of Journal of Dairy Research 1988

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