Keywords
Abstract
Present-day l iter ature data on the directions of improving the quality of locally produced sparkling wines are systematized. To increase the must yield, using of pneumatic membrane pressing machines is recommended. It has been established that using of membrane pressing machine Diemme Velvet 150 allows increasing the yield of high-quality must fractions to 68.2 daL/t. With an increase in the yield of must per 1 ton of grapes, an increase in the concentrations of gallic, lilac, caſtaric, cautaric acids, (+) – epicatechin, quercitin, quercitin-3-0-glycoside, procyanidins, polymer flavonoids with simultaneous decrease in the
concentration of (+) – D-catechin in the resulting base wine is observed. A quality control multi-criteria indicator of base wines obtained from must at its different output per 1 ton of grapes was developed. It was established that varietal base wines of ‘Cabernet-Sauvignon’ and ‘Rubynovyi Magaracha’, prepared using the 47-K yeast strain, are the best in terms of foaming capacity, aroma-producing complex and organoleptic evaluation. The optimal technological schemes of base wine processing are presented for white sparkling wines. It is advisable to use sugar-containing components of grape origin instead of tirage liqueur to improve
the quality of sparkling wines. A correlation between the mass concentration of polymeric forms of phenolic substances and the value of maximum foam volume indicator (Vmax) was established: for rose sparkling wines – 0.777, for red sparkling wines - 0.834. In order to improve the quality of sparkling wines, it is recommended to use autolysed wine yeasts obtained at the VA-0.6 unit for yeast mass cavitation treatment. A list of developed and approved STOs (standards of organizations) for determining specific indicators in the production of sparkling wines is given.