Pasteurized whole milk was fractionated with a pilot-scale, plate and frame, uhrafiltration system to study membrane fouling and flux decline. Concentration factor was set at approximately 1.4x to simulate the first stage of a multistage UF system. Proteinaceous membrane foulant was characterized by SDS-PAGE. Distribution of proteins in the foulant was very different from distribution of proteins in milk. Whey proteins, a-lactalbumin and/3-1actoglobulin, accounted for 95% of the proteinaceous membrane foulants. Very little casein was identified as membrane foulant.
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Tong et al. (1988) studied this question.
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