CONTROL OF BACTERIAL CONTAMINATION IN PROCESSES OF ALCOHOL FERMENTATION Russian patent published in 2015 - IPC C12P7/06 C12N1/38 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to control of microbial contamination in the process of alcohol fermentation. Claimed is an antimicrobial composition, including from 1 wt % to 5 wt % of an antimicrobial agent of a guanidine family, representing poly(hexamethylbiguanide); from 0.05 wt % to 0.5 wt % of antibiotic; and from approximately 94.5 wt % to approximately 98.5 wt % of a surface-active substance. The claimed composition is intended for control of contaminations with yeasts of a wild type, Lactobacilli and bacterial microbiota, contained in a must for the fermentation, obtaining the effect of deflocculation in the said must and for the protection of fermenting yeasts against competition with contaminants for sugar, contained in the must for the fermentation. A method of control of microbial contamination in the process of alcohol fermentation includes the addition of the said composition to the must.

EFFECT: group of inventions provides the effective reduction of a quantity of contaminant microbiota without an influence on the fermenting yeasts.

5 cl, 1 tbl