RU2389765C1 - Method of brewing flavoured dark beer - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to beer brewing technology. The method involves mixing lemon peel with hop. The obtained mixture is extracted using liquid nitrogen with separation of the corresponding miscella. Chicory is cut, dried in a microwave field at given process parametres and roasted. The chicory is mixed with malt. The obtained mixture is impregnated with the separated miscella with simultaneous increase of pressure. Pressure is decreased to atmospheric pressure level with simultaneous freezing of the mixture. The mixture is subjected to cryogenic grinding in the medium of the released nitrogen. Drinking water is poured and the mixture is saccharified to obtain wort. Brewing yeast is added to the wort. Primary fermentation, after fermentation and filtration are carried out.

EFFECT: invention shortens duration of the process and increases foam stability of the end product.

Description

The invention relates to brewing technology.

A known method for the production of flavored dark beer, involving obtaining mash from crushed malt, its saccharification, adding roasted chicory, boiling with hops, cooling, brewing yeast, main fermentation, fermentation of young beer and filtering it (UA 3481 C1, 1994).

The disadvantage of this method is the long duration of the process.

The technical result of the invention is to reduce the duration of the process and increase the resistance of the foam of the target product.

This result is achieved by the fact that in the method for producing flavored dark beer, which involves preparing wort from malt, roasted chicory and hops, introducing brewer's yeast into it, the main fermentation, fermentation of the young beer and filtering it, according to the invention, lemon peel and hops are mixed in the ratio by mass of 1:10 and the resulting mixture is extracted with liquid nitrogen with the separation of the corresponding miscella, chicory is cut, dried in the microwave field to a residual moisture content of about 20% at a microwave field power that provides chicory roar to a temperature inside the slices of 80-90 ° С, for at least 1 hour and fry, mix chicory and malt in a weight ratio of 1: (10-25), impregnate the mixture with separated miscella with a simultaneous increase in pressure, depressurize to atmospheric with simultaneous freezing of the mixture, it is subjected to cryo-grinding in the environment of nitrogen released, poured with drinking water and saccharified to produce wort.

The method is implemented as follows.

Lemon zest and hops are mixed in a ratio by weight of 1:10, the resulting mixture is extracted with liquid nitrogen and miscella is separated according to the known technology (Kasyanov G.I., Kvasenkov O.I., Nematullaev I., Nesterov V.V. Processing of plant materials with liquefied and compressed gases. - M .: AgroNIITEIPP, 1993, pp. 7-15). Through the use of the well-known effect of coextraction (Kasyanov G.I., Kvasenkov O.I.Soextraction // Second All-Russian Scientific and Technical Conference "Progressive environmentally friendly technologies for storage and integrated processing of agricultural products to create food products of increased nutritional and biological value." Abstracts . - Uglich: RASHN, 1996, p.239) the yield of extractives from the mixture is greater than their total yield upon separate extraction of the components.

Chicory is prepared according to traditional technology, cut and dried in the microwave field to a residual moisture content of about 20% for at least 1 hour. Moreover, according to well-known dependencies (Gubiev YK Scientific and practical principles of thermotechnological processes of food production in the electromagnetic field of the microwave. Abstract of the dissertation of the Doctor of Technical Sciences - M .: MTIPP, 1990, pp. 7-11) calculate the power microwave fields, allowing to provide the drying time of chicory 1 hour and heating to a temperature inside pieces of 80 and 90 ° C. The microwave field power is set greater than or equal to the second value and less than or equal to the smaller of the first and third values of the calculated powers.

Drying in the microwave field at temperatures above 90 ° C leads to premature caramelization of sugars. Drying in the microwave field at temperatures below 80 ° C and a reduction in drying time of less than 1 hour lead to a reduction in the yield of extractives. Since an increase in the drying time automatically leads to an increase in the specific energy consumption, the maximum value of the drying time is determined by the Harrington desirability function for the maximum yield of extractive substances with minimal specific energy consumption.

Then chicory is fried according to traditional technology (Nakhmedov F.G. Technology of cultivation, processing and use of chicory. - M .: AgroNIITEIPP, 1994, p.10-15).

Roasted chicory and malt are jointly loaded into the drum of the cryomill in a ratio by weight of 1: (10-25) and poured to impregnate the separated miscella. The amount of miscella is chosen according to well-known recommendations (Khristyuk A.V. Improving the technology of beer production. - Krasnodar: KNIIHP, 2003, p.133-134). The pressure in the drum automatically rises to a value corresponding to the pressure of saturated nitrogen vapor at the impregnation temperature. Impregnation time is calculated according to the known laws of mass transfer (Kosmodemyansky Yu.V. Processes and apparatuses of food production. A textbook for students of technical schools. - M .: Kolos, 1997, p.135-162). In this case, nitrogen is absorbed and the mixture is saturated with the extractive substances contained in the miscella.

After the impregnation is completed, the pressure in the drum is vented to atmospheric pressure, which ensures evaporation of nitrogen and freezing of the mixture, and then cryo-grinding of the mixture in the medium of nitrogen released is carried out.

The crushed mixture is poured with drinking water and saccharified to produce wort. Moreover, due to the use of gas-liquid miscella, the process of saccharification of the mash is accelerated and the yield of malt extractives into the wort is increased (RU 2318015 C1, 2008).

It should be noted that the implementation of wort hopping at the mashing stage significantly reduces the duration of the preparation of the wort.

The brewer's yeast is introduced into the resulting wort and, using the technology of the closest analogue, the main fermentation, fermentation of the young beer and filtration are successively carried out to obtain the desired product.

When conducting an organoleptic evaluation of the target product in accordance with GOST 3473, it was found that, compared with the product obtained by the closest analogue, the foam resistance is increased by 15-20%, which is probably due to an increase in the content of surfactants in the chicory extract when the described technology for its processing before frying.

Thus, the proposed method allows to reduce the duration of the process and increase the resistance of the foam of the target product.

Claims (1)

A method of preparing flavored dark beer, comprising mixing the zest of lemon and hop in a weight ratio of 1:10 and extracting the resulting mixture with liquid nitrogen to separate the corresponding miscella, chopping chicory, drying in the microwave field to a residual moisture content of about 20% with a microwave field power that warms up chicory to a temperature inside the pieces of 80-90 ° C, for at least 1 hour and frying, mixing chicory and malt in a weight ratio of 1: (10-25), soaking the resulting mixture with separated miscella while increasing the pressure drop to atmospheric pressure with simultaneous freezing the mixture in a medium cryogrinding its evolved nitrogen Bay water and saccharification to obtain the wort, making it brewer's yeast, the main fermentation, young beer secondary fermentation and filtration.