[Use of enzymatic hydrolysates of microorganism biomass in media for culturing Str. lactis, the producer of nisin].

Fermentative hydrolysates (FH) of the protein-vitamin complex (PVC) were used for the first time in media for cultivation of Str. lactis. It was found that the FH may be used in the media for cultivation of streptococci as a source of nitrogen instead of the yeast autolysate from baker's yeast and the level of nisin biosynthesis did not change. The replacement of the yeast autolysate by the FH is possible in both flasks with low volumes of the medium and 401 fermenters with 25 liters of the medium. The BVC FH is not a food raw material and its cost is low, which makes it advantageous.