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Suitability of polysulfone ultrafiltration membranes (UFM) commercial   designed for water treatment have been investigated for separation of protein   (PR) from sweet whey. Ultrafiltration (UF) of whey originated from dairy has   been realized by self-made pilot plant which has been in service about one   year. Influence of two whey temperatures (9 oC and 30 oC) on efficiency of   protein concentration has been examined. Application of investigated UF   elements has given whey protein concentrate (WPC) with 5 to 6 times excess   amount of protein content in regard to starting one. In the same time the   prevalent content of lactose has been removed to permeate. Better results   have been occurred during the cold whey filtration. Besides the fact that   molecular weight cut-off (MWCO) of investigated membranes were 50-100 kDa,   results showed very successful concentrating of whey proteins of dominantly   lower molar weights than 50-100 kDa. Investigated membranes are beneficial   for design and construction of UF plants for exploitation in small dairies

Investigation of whey protein concentration by ultrafiltration elements designed for water treatment