METHOD OF PRODUCING AROMATIZED DARK BEER Russian patent published in 2009 - IPC C12C12/00 

FIELD: process engineering.

SUBSTANCE: proposed invention relates to brewage. Lemon orange peel is mixed with hop. Obtained mix is extracted by liquid nitrogen to separate appropriate miscella. The process comprises cutting and drying in SHF field at preset process parameters, frying yakon, mixing yakon with malt, soaking obtained mix with separated miscella accompanied by pressure increase. Then, it includes pressure reduction to atmospheric pressure along with freezing said mix, cryogenic mincing in atmosphere of evolved nitrogen, adding sugar, filling with water and saccharification bringing about wort accompanied by beer yeast introduction, incipient fermentation, secondary fermentation and filtration.

EFFECT: reduced process time interval, higher durability of beer foam.