Method for preparing of raw grain material for fermentation

FIELD: distillation industry, in particular, process for preparing of raw grain material for alcoholic fermentation.

SUBSTANCE: method involves grinding grain; mixing ground grain with water and performing thermal processing of batch; introducing phytase into batch at mixing stage, said mixing process being carried out in two stages, first stage including heating batch to temperature of 45-55 C during 15-20 min, and second stage including heating batch in flow and holding at temperature of 60-70 C during 1.5-2 hours.

EFFECT: intensified process for preparing of grain for alcoholic fermentation, increased yield of ready product and provision for adjustment of dough batch acidity within wide range of values.

1 tbl, 1 ex

 

The invention relates to the alcohol industry, and in particular to methods of preparation of grain raw material for alcoholic fermentation.

The known method of preparing grain feedstock for fermentation, in which the grinding of grain, mixing it with water, and heat treatment batch. Acidification of the mixture carried out with sulfuric acid (see marynchenko, VA, Technology, alcohol, M., "Light and food industry", 1981, page 63, 69-70).

The disadvantages of this method include the fact that this method is not effective, because the use of sulfuric acid leads to the complexity of the process and equipment corrosion and affect the quality of the final product.

The technical result of the proposed invention is to accelerate the process, increase the yield and quality of the finished product by further hydrolysis.

This is achieved in that in the method of preparing grain feedstock for fermentation, providing for grinding grain, mixing it with water, the heat treatment of the mixture during the mixing in the mixing enter the phytase, the mixing is carried out in two stages, the first of which the mixture is heated to a temperature of 45-55°C for 15-20 minutes, while the second batch is heated in a stream and maintained at a temperature of 60-70°C for 1.5-2 hours.

The world is but that change in the acidity of the batch in the production of ethyl alcohol affects the whole process.

Optimization of pH leads to a decrease of the consumption of enzyme preparations (for example, when the saccharification).

Fermentation increased the initial acidity of the wort leads to the suppression of the development of foreign flora.

Carrying out the oxidation process due to the use of substances contained in the grain, distinguishes the claimed method from the known and makes it more efficient.

The grain in the associated state contains phosphoric acid.

In grain cereals contain phosphorus, most of which is in the form of esters, among which quantitatively dominates phytin. Phytin is a mixture of calcium and magnesium salts of phytic acid, which hexaphosphoric ether complex of inosine. Phytin is localized mainly in the membranes of grain. Phytase under certain conditions catalyzes the hydrolysis of phytin by the equation

With6H6(HE2RHO3)+6N2O=C6H12O6+6N3PO4.

As a result of hydrolysis of one molecule of phytin is formed Inositol cyclic chastity alcohol cyclohexane and 6 molecules of phosphoric acid. The released acid provides acidification batch./p>

Example

Grain raw material (wheat) after grinding and pass through a sieve with 80% passage is mixed with warm water and at the stage of mixing the dough, add an aqueous solution of a group phosphoesterase - phytase. Mixing is carried out in two stages, the first of which the mixture is heated to a temperature of 45-55°C for 15-20 minutes. Then in the second stage, the mixture is heated in a stream and maintained at a temperature of 60-70°C for 1.5-2 hours.

Adding phytase shutter speed at the second stage is reduced to 1.5-2 times. The acidity of the mixture is regulated by the amount specified enzyme preparation and processing.

Below is a table of comparative figures for proceedings held without phytase and phytase.

Performance comparisonThe process of grain raw material preparation without phytaseThe process of grain raw material preparation with phytase
Processing time in hours41,5-2
The acidity of the batch,0of 0.2-0.30,3-0,5
Temperature sterilization,0120-125105-110
The duration of fermentation, in hours60-6648-55
Alcohol output in DCL of 1 ton of starch66,566,7

The invention will accelerate the process of preparing grain feedstock for fermentation, to increase the output and quality of the end product and, in addition, will provide the possibility to adjust the pH of the mixtures in a wide range (pH 3.0 to 5.8).

The method of preparation of the grain feedstock for fermentation, providing for grinding grain, mixing it with water, heat treatment batch, characterized in that at the stage of mixing in batch enter phytase, the mixing is carried out in two stages, the first of which the mixture is heated to a temperature of 45-55°C for 15-20 min, while the second batch is heated in a stream and maintained at a temperature of 60-70°within 1.5-2 hours



 

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