BG66523B1 - A method for increasing the protein content in sunflower groats - Google Patents

Abstract

The invention refers to a method for increasing the protein content in sunflower groats by means of a derivation of sunflower protein concentrate with a protein content above the minimum of 42 % and raw fibres no more than the maximum of 12 % at humidity from 8 to 10%. The method involves the consecutive operations of grinding, grading, and fractioning of the large agglomerates of sunflower of sunflower groats with initial content of protein 36 % and of raw fibers 20 %, by using a complete set of sifters and by applying air-sifter separation in the conditions of boiling layer and combining the separated high-protein fractions. As a result two products are obtained: sunflower protein concentrate with an output from 55 to 70% and in store for food of young farming animals and birds as a substitute of much lower cost as compared to the fodder industry soya groats, and sunflower bran with 18% protein content.

Description

(54) PROCEDURE FOR INCREASING PROTEIN CONTENT IN SUNFLOWER GRAPH

Technical field

The method for increasing protein content in sunflower meal will find application for the production of feeding products for young birds and mammals, juveniles and animals that have completed their growth period, as well as animals during the fattening period.

BACKGROUND OF THE INVENTION

A method of patent US 64 933 is known for treating sunflower seed meal from ordinary sunflower seed for animal feed, in which the extraction meal particles are subjected to mechanical structuring and fragmentation, thereby releasing the nuts contained in the flakes by the rupture of the coarse flakes their fiber structure improves. A screening is then carried out to sort the particles by bulk, as from the larger fraction obtained, which does not pass through the sieve during sieving, by air separation the light crude particles containing flakes are separated and a high fraction is obtained and collected. more than 15% crude fiber content and low protein content. High specific gravity particles consisting of nuts and covered by flake nuts form a fraction high above 40% crude protein content and low below 10% crude fiber content.

A disadvantage of the known method is the incorporation of a grinding process in which the agglomerates are ground simultaneously with the protein and cellulose particles (flakes), resulting in the particles having similar sizes and ineffective separation both by sieves and by ordinary air separation in aspiration columns or cyclones.

SUMMARY OF THE INVENTION

It is an object of the invention to provide a method whereby the processes of mechanical crushing, grinding, and crushing with impact machines are to be eliminated and to provide a method whereby two products, one having a high protein content, are eliminated. less than 42% and of a second product with a protein content of not more than 18%.

The problem is solved by a method according to the invention, comprising the following sequence of technological operation - initial grinding of sunflower meal to a size of 5 mt, then six times grinding to a size of 50 to 300 microns, followed by sorting by sieves and subsequent merging of fractions into two technological streams . The first is rich in protein and the second is cellulose, whereby the high-protein flow is aspirated by a sieve in a fluidized bed, further enriched with protein, resulting in two products - a high-protein product with no protein content. less than 42% and a low protein product with a protein content of up to 18%.

The crushing process is accomplished by bonding the mutually glued particles in pre-created conditions of forced friction into one another in a specially designed device.

A major advantage of the method of the invention is to achieve an increased protein content in the sunflower meal of not less than 42% and a reduction of the crude fiber to no more than 12% with a moisture content of the sunflower meal of 8-10%. It is precisely the achievement of these indicators that enables it to be used in the feeding of young birds and mammals, adolescents and animals that have completed their growth or fattening period.

Another advantage of the method is that the nutritional performance of the products obtained is very close to that of soybean meal, which results in successful substitution with the products by the method in animal nutrition at a much lower cost cost.

An embodiment of the invention

Example 1.

The method according to the invention is realized with the following sequence of technological operations:

- Cutting sunflower meal, the so-called. preparatory destruction of agglomerates. Sunflower meal with 36% protein content and 20% crude fiber is ground in

66523 ΒΙ Propeller machine with screen drum. The starting material has a particle size distribution below 5 [mu] m of particles.

- Subsequent six-fold grinding, resulting in consistent destruction of the agglomerates. The prepared product is fed six times in succession by grinding to a mixture of enriched protein fraction and high crude fiber fraction. The granulometric composition of the mixture is from 50 to 300 microns.

- Sorting by sieves, so-called. sieve separation. The resulting product is submitted for sorting with the aid of suitably selected sieves. The number of screenings corresponds to the number and multiplicity of gross grinding. High protein content sieves are combined into one product, and low protein content sieves are combined into another product.

- Aspiration treatment by sieving machine in conditions of fluidized bed, air-sieve enrichment. The high protein flow is treated with an aspirating sieve machine under fluidized bed conditions created by the sieve vibrations and the aspirational flow in the machine. Protein flux is further enriched in protein and its crude fiber content is reduced. Combining the fractions with a higher protein content yields a product with up to 70% yield from the initial weight of the sunflower meal and a protein content of not less than 42%. Fractions with high crude fiber content are combined to give a second product, yielding 30% of the initial weight of the sunflower meal and protein content of not more than 18% and high crude fiber content.

Claims (1)

Claims 1. A method for increasing protein content in sunflower meal, in which agglomerated meal particles are sorted by size of a fraction of high protein content and a second fraction with low protein content, characterized in that the sunflower meal is subjected to initial grinding up to a size of 5 mt, followed by six times grinding to a size of 50 to 300 microns, follows the sorting of the bulk fractions by sieves and combining the fractions into two process streams, the first is rich in protein and the second is cellulose, whereby the isocoprotein flow is aspirated by a sieve machine under fluidized bed conditions, further enriched with protein, resulting in two products - a high-protein product with a protein content of at least 42% and a low-protein product with a protein content until 18 %.