About the Journal

Authors:

V. A. TIMKIN, candidate of technical sciences, associate professor, professor,

Ural State Agrarian University (42 K. Liebknechta Str., 620075, Ekaterinburg)

Abstract. The article presents the results of a study of the processes of micro-, ultra- and nanofiltration of ultrafiltration in the manufacture of cheese, processing of whey concentrate and skim milk. The studies were conducted in the laboratory of the Ural State Agrarian University and in production on “Yugovskoy dairy plant”, farm of Anikev A. V. and “Polevskoy dairy plant”. It is established that the ultrafiltration process is advantageously carried out with the use of ceramic membranes, which are much easier to regenerate, while the lifetime of the ceramic membranes is 3 to 5 times more in comparison with polymeric membranes. The expedience of the application of microfiltration in the production of ultrafiltration cheese is proved. It is shown that, with pasteurization microfiltration of skim milk permeate retains all the valuable components. The amount of permeate is 92–96 %. The efficacy of microbiological purification by the method of microfiltration of milk pasteurization is 99.9 %, and the heat pasteurization – 90.9 %. Conducted microbiological studies of ultrafiltration of cottage cheese to determine validity, depending on the source of milk used for fermentation of caille. It is established that the shelf life of ultrafiltration of cottage cheese obtained from milk treated by microfiltration pasteurization, almost 3 times longer than the shelf life of UV cheese ob- tained from heat-pasteurized milk. Designed equipment for the production of ultrafiltration of cheese, concentration of whey and skim milk baromembrane methods. The results obtained allow us to introduce high–tech, competitive for large dairy enter- prises and enterprises of small capacity. It provides aseptic conditions for the production of the product, different performance and level of automation. The author developed recommendations on introduction in manufacture of technology that uses a membrane of domestic production.