FIELD: food industry.
SUBSTANCE: invention is implemented by following: Grape juice is subjected to electrodialysis in electrodialyser desalting cells at charge density 100-120 A/m2 and being concentrated. Cognac distillery dreg is supplied into electrodialyser desalting cells.
EFFECT: increased efficiency of preliminary deacidification and decreased content of kalium in grape juice before concentrating.
5 ex
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