Journal
INTERNATIONAL DAIRY JOURNAL
Volume 48, Issue -, Pages 38-45Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.idairyj.2014.12.004
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Funding
- German Ministry of Economics and Energy
- FEI (Forschungskreis der Ernahrungsindustrie e.V., Bonn) [AiF 16714 N]
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Whey from former cheese batches can be recycled either to increase the yield or to improve texture properties of fat reduced cheeses. However, in the case of the presence of bacteriophages, pasteurization may not be sufficient to eliminate phages in whey. Therefore, in this work, a cross-flow membrane filtration process was designed to separate whey proteins from whey-derived phages. Filtration experiments were carried out using native whey as model filtration medium, three polyethersulfone membranes (100, 300 and 500 kDa) that were studied in detail, and lactococcal phage P008. Filtration performance was characterized by phage retention, total whey protein permeation, and permeation of the major whey proteins alpha-lactalbumin and beta-lactoglobulin. Filtration experiments showed that it is possible to reduce the number of phages in whey by filtration to a level at which subsequent phage multiplication is minimized and, concomitantly, high protein permeation through the membrane is ensured. (C) 2014 Elsevier Ltd. All rights reserved.
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