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- Title
Demineralisation of whey by a combination of nanofiltration and anion-exchange treatment: a preliminary study.
- Authors
Okawa, Teiichiro; Shimada, Masayuki; Ushida, Yoshihiko; Seki, Nobuo; Watai, Naoki; Ohnishi, Masatoshi; Tamura, Yoshitaka; Ito, Akira
- Abstract
Demineralisation is an important process for the utilisation of whey in the food industry. Sodium (Na+) and potassium (K+) ions pass through nanofiltration ( NF) membranes in ion pairs with chloride (Cl−) to maintain electroneutrality, but NF processing can only partially remove these ions from whey, because the total Na and K content of whey generally exceeds the Cl content. In this work, a preliminary study of a new demineralisation method was made. A reconstituted sweet whey powder solution was first treated by Cl-form anion-exchange resin to increase the molar ratio of Cl to Na and K from ~0.5 to ~1.0. Subsequently, NF removed >90% of Na and K from the anion-exchange treated whey compared with <60% from the control whey. This new process could be useful for producing 70% demineralised whey with very low levels of the monovalent ions Na+, K+ and Cl−.
- Subjects
DEMINERALIZATION; NANOFILTRATION; ION exchange (Chemistry); FOOD industry; ELECTRODIALYSIS; CALCIUM chloride
- Publication
International Journal of Dairy Technology, 2015, Vol 68, Issue 4, p478
- ISSN
1364-727X
- Publication type
Article
- DOI
10.1111/1471-0307.12283