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Efficiency of cleaning agents for an inorganic membrane after milk ultrafiltration

Published online by Cambridge University Press:  01 June 2009

Georges Daufin ,
Uzi Merin ,
François-Louis Kerherve ,
Jean-Pierre Labbe ,
Auguste Quemerais  and
Charles Bousser
Georges Daufin
Affiliation:
INRA, Laboratoire de Recherches de Technologie Laitière, 65 rue de Saint Brieuc, 35042 Rennes Cédex, France
Uzi Merin
Affiliation:
Dairy Science Laboratory, Agricultwal Research Organization, The Volcani Center, PO Box 6, Bel Dagan 50250, Israel
François-Louis Kerherve
Affiliation:
INRA, Laboratoire de Recherches de Technologie Laitière, 65 rue de Saint Brieuc, 35042 Rennes Cédex, France
Jean-Pierre Labbe
Affiliation:
École Nationale Supérieure de Chimie, 11 rue P. et M. Curie, 75231 Paris Cédex 05, France
Auguste Quemerais
Affiliation:
Université Rennes 1, Faculté des Sciences, Laboratoire de Spectroscopie, Avenue du Général Leclerc, Campus de Beaulieu, 35042 Rennes Cédex, France
Charles Bousser
Affiliation:
Laboratoire de Recherche Appliquée, Henkel France, 51000 Châlons sur Marne, France
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Summary

Cleaning of inorganic membranes after ultrafiltration (UF) of skim milk has been assessed using hydraulic, physicochemical and spectroscopic (i.r. and X-ray photoelectron spectroscopy) measurements. A cleaning sequence using hypochlorite alone or hypochlorite followed by HNO3 restored the membrane hydraulic resistance, in contrast to cleaning with HNO3 alone. When using NaOH, addition of Ca complexants (EDTA, gluconate, tripolyphosphate) and surfactants was required to obtain similar results. Three types of criteria (hydraulic, kinetic, chemical) are available to assess the effect of the sequestrant and surfactant types. In all the cases studied, traces of protein and Ca were detected on and within the membrane after cleaning. Nevertheless, it was concluded that it is possible to develop a single-step alkaline product to clean inorganic milk UF membranes if suitable surfactants and Ca sequestrants are included in its formula.

Type
Original Articles
Information
Journal of Dairy Research , Volume 59 , Issue 1 , February 1992 , pp. 29 - 38
Copyright
Copyright © Proprietors of Journal of Dairy Research 1992

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References

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