FIELD: dairy industry. SUBSTANCE: whole milk is separated in centrifugal separator into cream and skim milk fractions. Part of cream fraction is admixed to skim milk fraction to form mixed milk fraction with required fat level. According to invention, all cream fraction stream leaving one outlet of centrifugal separator mixes with assistance of a valve means for a specified period of time with skim milk fraction stream leaving the other centrifugal separator outlet. During the second intermediate time period, overall cream fraction stream is withdrawn by means of above valve means and collected separately. Mentioned time periods are so short that fat level and mixed fraction flow per unit time can be considered to be homogeneous. EFFECT: reduced expenses to make process economically efficient in small-scale production. 6 cl, 3 dwg
