SU925286A1 - Method of separating food raw from stripped bone - Google Patents

Description

(54) METHOD FOR SEPARATION OF FOOD RAW MATERIALS FROM BONELESS BONE

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The invention relates to the meat industry, more precisely to the separation of food raw materials from boneless bone and can also be used in fish processing plants.

There is a method of separating food raw materials from boneless bone, which involves freezing, crushing, separation in a dispersion medium with a negative temperature into fractions and separation of the latter from residues of medium 1.

When this method is implemented, freezing is carried out with liquid nitrogen, which makes the process expensive, and it also does not allow the separation of food raw materials into spice, carcass, dentate, connective tissue, meat and fat.

The aim of the invention is to improve the process and improve the quality of the separation of raw materials.

This is achieved by using the iodine solutions of sugar or salt or glycerin as a dispersion medium in the method of separating food raw materials from boneless bone, which involves freezing, crushing, separating in a dispersion medium with a negative temperature in terms of density into fractions and separating the latter from residues of the medium. Density separation is carried out in 4-5 stages with the release of one fraction at a stage, and the raw material with the medium is subjected to centrifugal 1 U at each stage.

The dispersion medium is used with a temperature of from 1 to -40 ° C and a density of I -1.5 g / cm, and the separation of the ф-fractions from the residue of the medium is carried out by filtration.

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The bones with myasia after manual deboning are crushed to a size of 50-80 mm, then frozen to a temperature of -35 ° C, and then crushed in a cooled hammer crusher to a size

15 from 20 mm and less. Next, the crushed and frozen bulk raw materials are dispersed into fractions by size on hand screens.

Example 1. For the experiment, a fraction with a particle size of 7 h-10 mm was selected. 845 g of m-raw materials are poured into pre-heated challed glass cups of a cooled centrifuge and shifted with an aqueous solution of glycerin

25 to 20 weight. %, with a density of 1.051 g / cm and a temperature of -5.0 ° C. The temperature in the working chamber of the centrifuge is kept at -7 ° C. The centrifuging process is carried out for 5 minutes at

the rotor speed is 500 per minute, which corresponds to a peripheral speed of 15 m / min. Due to the centrifugal force and differences in the density of the layers, the initial suspension is layer-by-layer separated: a light fraction, an aqueous solution of glycerin, and a heavy fraction. First, a light fraction is discharged from the upper part of the vessels, and then the glycerin solution is discharged and the heavy fraction is discharged.

The light fraction is placed in a centrifuge filtering drum and cleaned of residual aqueous glycerin solution at separation factor 880. The light fraction contains 16 g fat particles.

The heavy fraction is placed in a filter centrifuge drum and cleaned of residual glycerin aqueous solution with a separation factor of 880.

Then the third fraction is mixed with an aqueous solution of glycerin with concentrations of 37 wt. %, a density of 1.092 g / cm and a temperature of -13 ° C and the suspension is poured into pre-cooled cups of a cooled centrifuge. The temperature in the secondary chamber of the centrifuge is kept at -15 ° C.

After centrifugation, light and heavy fractions are obtained. The light fraction contains 19 g of muscle tissue with a small admixture of connective tissue. The light and heavy fractions are separately separated from the residual glycerin aqueous solution by centrifugation.

Then the heavy fraction is again transferred with an aqueous solution of glycerin with a concentration of 57 wt. %, with a density of 1.143 g / cm3 and a temperature of -33 ° C and centrifuged in glass cups. The resulting light fraction contains 183 g of connective tissue with a small amount of spongy substance. After purification of the light and heavy fractions from residues of the aqueous solution by centrifugation, the heavy fraction is again mixed with an aqueous solution of glycerin with a concentration of 85 wt. %, a density of 1.210 g / cm and a temperature of -10 ° C and subjected to a centrifugal lag. The light fraction obtained from the separation contains 33 g of a spongy substance. The heavy fraction contains 594 g of bone and cartilage.

Example 2. For the experiment, a fraction of particles of crushed milled raw material with dimensions of 5-7 mm was selected. For the separation, aqueous solutions of sugar are used with the data given in table. one.

T a b l ii c a

Centrifugal settling is carried out at 500 rpm for 5 minutes. The results of experiments on the separation of crushed m of raw material with a particle size of 5-7 mm are presented in Table. 2

table 2

Example 3. For carrying out the experiment, fractions of particles of raw material with a size of 5-2.8 mm were selected. For the separation, aqueous solutions of sodium chloride were used with the data given in table. 3

Centrifugal settling is carried out at 500 rpm for 5 minutes. The results of the experiments on the separation of crushed m raw material are presented in Table. four.

Table 3

Example 4. For the experiment, particles of crushed krill were selected. For the separation, an aqueous solution of sodium chloride concentration of 6.5 wt. %, with a density of 1.050 g / cm, temperature -4, .2 ° C. Centrifugal settling is carried out at 500 rpm for 5 minutes. As a result of the experiments obtained, g:

Muscle Tissue Chitinous membrane and heads

Thus, the use of the invention allows to divide the food raw materials into components and make better use of all their components, as well as reduce the cost and intensify the separation process.

Claims (3)

1. A method for the separation of food raw materials from boneless bone, involving freezing, crushing, and separation in T a b l II c a 4 dispersion medium with a negative temperature in terms of fractions and separation of the latter from residues of the medium, characterized in that, in order to reduce the cost of the process and improve the quality of the separation of the raw material, aqueous solutions of sugar or salt, or glycerin are used as the dispersion medium in 4-5 stages, with one fraction being isolated at each stage, and the raw materials with the medium are centrifuged at each stage. 2. A method according to claim 1, characterized in that the dispersion medium is used with a temperature of - (1-40 ° C) and density 1 - 1.5 g / cm3 3. A method according to claim 1, characterized in that the separation of fractions from residues of the medium is carried out by filtration. The source of information taken into account in the examination; 1. USSR author's certificate No. 356986, cl. A 22 C 17/04, 1970 (prototype).