METHOD OF PRODUCING WHEY PROTEIN HYDROLYSATE WITH HIGH DEGREE OF HYDROLYSIS AND WHEY PROTEIN HYDROLYSATE WITH HIGH DEGREE OF HYDROLYSIS

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to dairy industry. The method involves ultra and diafiltration of a whey protein solution prepared from a dry whey protein concentrate and bringing the whey protein concentrate solution obtained after ultra and diafiltration to weight ratio of dry substances equal to 4.8-5%, pasteurisation thereof followed by enzymatic hydrolysis using a substrate enzyme in ratio of 5 wt %, ultra-filtration of the obtained crude hydrolysate on membranes with carrying capacity on molecular weight of 5 kDa and 2 kDa, while constantly returning the obtained concentrate to ultrafiltration. The obtained first run filtrate is further purified through ultrafiltration on membranes with carrying capacity on molecular weight of 5 kDa and 2 kDa, while constantly returning the obtained concentrate to ultrafiltration, and the obtained second run filtrate which contains purified hydrolysate is concentrated vai reverse osmosis and then thickened, pasteurised and dried. The obtained hydrolysate is characterised by that it is delactosed and over 75% of the protein material is concentrated in fractions of low-molecular peptides in molecular weight range of 0.5-2 kDa.;EFFECT: group of inventions enables to increase biological and nutrition values, as well as improve organoleptic properties and quality of the obtained hydrolysate with possibility of its use in hypoallergic mixtures for functional purposes.;2 cl, 5 tbl, 5 ex, 5 dwg