Аннотация
Currently, the protein content in the feed used in animal husbandry is insufficient. Due to the lack of protein in feed, productivity and product quality are reduced, which leads to unjustified losses of feed. In this regard, it seems appropriate to obtain a feed additive based on the biomass of microorganisms. The use of yeast biomass and their consortiums makes it possible to reduce protein deficiency problems in accordance with modern requirements. The scientific article is devoted to the research work on the production of a feed additive by a yeast consortium on secondary substrates, including milk whey. Yeast strains isolated from lactic acid products - Kluyveromyces marxianus SS1, Candida kefyr KK1, Kluyveromyces marxianus KK2, collectible strains - Pichia fermentans TD1, Kluyveromyces marxianus TD7 were used as objects of research. Morphological-cultural, molecular-genetic, biocompatibility properties of yeast cultures were studied. Consortia of yeast cultures with high growth intensity in milk whey were compiled: 1) Candida kefyr KK1 - Pichia fermentans TD1; 2) Pichia fermentans TD1 - Kluyveromyces marxianus TD7. The property of collecting biomass in milk whey of mono-and mixed cultures of yeasts was studied. The study showed that the use of mixed cultures is more effective than the use of monoculture when obtaining feed additives.