Efficiency of cleaning agents for an inorganic membrane after milk ultrafiltration

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 h...

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Bibliographic Details
Published inJournal of dairy research Vol. 59; no. 1; pp. 29 - 38
Main Authors Daufin, G, Merin, U, Kerherve, F.L, Labbe, J.P, Quemerais, A, Bousser, C
Format Journal Article
LanguageEnglish
Published England 01.02.1992
Subjects
Animals
Cattle
chemical composition
cleaning
Detergents
hydraulic resistance
membrane permeability
Membranes, Artificial
Milk - standards
milk filters
Nitrates
Nitric Acid
skim milk
Sodium Hypochlorite
Spectrometry, X-Ray Emission
Spectrophotometry, Infrared
Surface-Active Agents
Ultrafiltration
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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.
ISSN:0022-0299
1469-7629
DOI:10.1017/S0022029900030211