SU1725755A3 - Method for treatment soya seeds into aqueous suspension - Google Patents

Abstract

The invention relates to the oil and fat industry and concerns the processing of soybean seeds. Essence: the seeds are cleaned of impurities, at the same time, trypsin inhibitors in the extruder chamber are crushed and destroyed at a pressure increasing in the process to a final value of 13 "105 - 28105 Pa, followed by an instantaneous release of pressure to atmospheric, and water formed in the formed foam mass mix, filter the mixture and pasteurize.

Description

The invention relates to the oil and fat industry and can be used in the processing of soybean seeds.

There is a known method of seed processing in the production of soy milk, which includes heat treatment of non-swollen soybeans in an aqueous solution of sodium bicarbonate at boiling point, grinding them in a liquid medium, extraction of protein and water-soluble components in whey, into which monoglycerides are added.

The disadvantage is the complexity of the process.

The closest to the invention is a method for producing an aqueous suspension of soybean, according to which soybean beans are ground in the presence of water and thermally destroy the anti-trypsin factor at 90-100 ° C to a dispersion of 100-600 µm, the dispersion is heated by injection of steam to 120-160 ° C and crushed to particles of protein and fat 2-10 microns and cell walls 40-100 microns.

The disadvantage is the low quality of the suspension due to the deterioration at high temperature of the properties of the native protein, the complexity, duration and power consumption of the process due to heating in two stages and grinding in a ball mill.

The aim of the invention is to improve the quality of the suspension, simplify the process and reduce energy consumption.

The goal is achieved in that according to the method of processing soybean seeds to obtain an aqueous suspension, including cleaning seeds from impurities, grinding, destroying trypsin inhibitors, adding water, grinding seeds and destroying trypsin inhibitors simultaneously in the extruder chamber at a pressure increasing process to a final value (13-Ю5 - 28 Ю5) Pa followed by instantaneous depressurization to atmospheric, water is added to the formed foam mass and stirred, then the mixture is filtered and pasteurized.

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The method is carried out as follows.

The soybean seeds are transported by transport elements into an accumulation bin, then to the separator, where large and small impurities are selected (grasses, leaves and soybean leaves, mineral impurities, and others). The cleaned soybean seeds are fed into the bunker in a portion, then the magnetic protection is passed, enter the peeler, where the film is removed and blown away by the fan to the feed waste bin.

From the sheller, the cleaned soybean seeds come in as an aspirator, where they are completely cleaned from the film, which is also carried to the feed waste bin, and, as they accumulate by road, are shipped for processing to cattle feed.

The cleaned soybean seeds are fed to the extruder chamber. Water is also supplied as needed. When moving from the loading port of the extruder chamber to the outlet cone head, the soybean seeds undergo crushing, grinding, friction and multiple compression. An autopsy of the cells takes place and the mass is self-heated (without additional heat supply) from 20 to 140 ° C for 25-30 seconds, at the same time the pressure reaches 28105 Pa.

With an instantaneous release of pressure to atmospheric pressure, a foam mass is formed that dissolves easily in water. The resulting mixture is filtered, the suspension is pasteurized to increase the shelf life and fed into the final product tank.

If necessary, to increase the nutritional value, sugar, salt, vitamins, fruit or vegetable juice, etc. are added to the finished slurry.

In the extruder, inactivation of trypsin inhibitors, chymotrypsin and other anti-nutrients occurs.

The activity of urease, according to which the activity of trypsin inhibitors is judged, after processing the mass in an extruder is reduced to 0.05-0.08 (a change in pH in 30 s / min), which is less than the permissible norm.

The content of water-soluble protein is 83-86% of the total protein.

The soybean suspension is a fine dispersion of protein and lipids in an aqueous solution, it has a high nutritional value and in content

proteins and fats approaching cow's milk. There is no cholesterol in the fat of the soybean suspension, it contains essential fatty acids such as linolene,

Linolenova and others capable of removing cholesterol from the body.

Example. Soybean seeds with a moisture content of 14% are fed to the extruder after cleaning. The temperature of the soybean seeds before feeding into the extruder is 20 ° C; at the exit from the extruder 140 ° C; the pressure at the exit from the extruder is 18-U5 Pa, the residence time of the mass in the extruder is 30 seconds. Oil content of seeds is 20.5% for absolutely dry matter.

The foamed mass obtained after the extruder is dissolved in water at 75 ° C, the mixture is filtered to separate insoluble particles, the suspension is pasteurized at 95 ° C, fed to the finished product tank

and cooled to 8 ° C.

The soyaev suspension has the following composition: mass fraction of solids 6.5%, mass fraction of fat (per dry substance) 21%; mass fraction of crude protein (on

dry matter) 40.5%; the mass fraction of water-soluble protein is 86% of the total amount of protein; urease activity 0.05 pK.

Compared with the known method, the proposed method allows reducing energy consumption by 1.5-2.0 times, reducing urease activity by 2-3 times, increasing the mass fraction of water-soluble protein by 6-8% (of the total amount of protein).

Thus, the proposed method allows to improve the quality of the suspension, simplify the process and reduce energy consumption.

Claims (1)

Invention Formula A method of processing soybean seeds to obtain an aqueous suspension, including cleaning the seeds of impurities, grinding, destroying trypsin inhibitors and adding water, characterized in that In order to improve the quality of the suspension, simplify the process and reduce energy consumption, the grinding of seeds and the destruction of trypsin inhibitors are carried out simultaneously in the extruder chamber at a pressure that increases in the process to a final value of 13-105 - 28-Yu5 Pa, followed by instantaneous release of pressure to atmospheric, and water add to the resulting foamed mass and mix, then the mixture is filtered and pasteurized.