SU1084004A1 - Method of producing food additive from tanning waste of leather production - Google Patents

Abstract

METHOD FOR PRODUCTION OF FEED SUPPLEMENTS tanning tannery waste comprising ter MO acid hydrolysis of waste posledukltsuyu neutralization of tlichayuschiys in that, for the purpose povsheni pitatelnocti feed additive, hydrolysis is carried out to waste pycnometric density hydrolytic solution 1.1037 1 2871 g / cm at a sulfuric acid concentration of 3.0-3.1% for 3060 minutes at a temperature of 96-98 ° C, and the neutralization is carried out with calcium carbonate, taken in an amount of 2.5-3.0% of the volume of the hydrolysis solution. ate

Description

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The invention relates to fodder production and can be used to obtain fodder proteins: Vka additives from tanned waste to: European production (chrome chips, chrome dust, tanning splices, chrome flap, cutting, cutting).

A known method for the production of fodder protein supplement from leather production wastes, according to which water is added to the waste and boiled at boiling in the presence of 3-8% lime, 0.5-2.0% sodium chloride for 2-10 hours. The resulting protein solution defend, separate from sediment, enter or dry 1.

The disadvantage of this method is the loss of nutrients due to undigested waste residues, which reduces the yield of the feed product.

There is also known a method for the production of feed supplements from tanned leather production, including hydrolysis of waste for 15 minutes at 96-100 ° C, and 3aTeivi under the action of 3% sulfuric acid solution for 12 minutes, after which the product is washed

water to pH 6.0-6.6 and dried 12

However, according to a known method, it is impossible to process such tanned wastes, such as spun ducks, chrome flap trimming, since these types of raw materials are much larger than chrome chips in size and stability, and chrome dust is lost. There is also no complete extraction of chromium and the transfer of waste to the elastic (soft) state. In the known method, it is not envisaged to use the spent sulfuric acid hydrolysis solution, in which some nutrients remain, which reduces the nutritional value of the feed product and its yield relative to the initial mass of the waste.

The purpose of the invention is to increase the nutritional value of the combo supplement.

The goal is achieved by the fact that according to the method, which includes the thermo-acid hydrolysis of waste and its neutralization, the hydrolysis of waste is carried out to a pycnometric density of a hydrolysis solution of 1.1037-1.2871 g / cm with a sulfuric acid concentration of 3.0-3.1% for 30 - 60 minutes at a temperature of 9698 ° C, and neutralization is carried out with calcium carbonate, taken in an amount of 2.5-3.0% by volume of the hydrolysis solution.

The resultant additive is a calcium protein protein feed.

To obtain a calcium protein protein supplement, all the above mentioned waste can be used.

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no more than 2.5-3.0 cm separately or together. Raw materials are hydrolyzed in a 3.0-3.1% solution of sulfuric acid at 96-98-C for 30-40 minutes, depending on the type of raw material. During this period of hydrolysis, the tanned waste is dissolved.

To further use the sulfuric hydrolysis solution, its pycnometric density should be equal to or higher than 1.1037, g / cm. Calcium carbonate in the amount of 2.5-3.0% by volume of the solution is added with stirring to a solution with a pycnometric density equal to or higher than 1.1037 g / cm. After the end of the reaction, from the moment the solution begins to solidify, stirring is stopped. The process of formation of a solid friable mass lasts 80 minutes.

The resulting capillary-protein feed additive is fed in its natural form or dried using appropriate aggregates such as AEM and the like.

In tab. 1 shows the chemical composition of the calcium-protein feed additive.

Table 1

Example. Tanning wastes with a size of not more than 2.5-3.0 cm Shchromov chips, chromium dust, spilkova doublet. On trimming, chrome flap, cutting, cutting) in the mass of 500-750 k is loaded into a container containing -3.0% -she sulfuric acid solution. The mass of the acid solution should exceed 2 times the mass of tanned skin waste subjected to hydrolysis. Thus, with a mass of tanned waste equal to 500-750 kg, the mass of a 3.0% aqueous solution of sulfuric acid is 1000 kg. Sulfuric acid solution with tanned skin waste is heated to and held for 60 minutes. Calcium carbonate in the form of a solid salt is added to a sulfuric acid hydrolysis solution with a pycnometric density of 1.1037 g / cm with stirring so that its concentration is 3.0% by volume. After termination of the reaction in the hydrolysis solution, after 90 minutes it solidifies to form a solid phase. The yield of the useful product is 95%. Example 2. Tanned wastes with a size of not more than 2, .0 cm (chrome chips, chromium pich, split tanning trimmings, chrome forest kut, cutting, cutting) in a mass of 750.c are loaded into a container containing 3.1% solution sulfuric acid, weight of 1000 kg. Sulfuric acid solution with tanned skin waste is heated to and held for 45 minutes. Calcium carbonate in the form of a solid salt is added to a sulfuric acid hydrolysis solution with a pycrmetric density of 1.2871 g / cm with stirring so that its concentration is 3% (30 kg). After completion of the neutralization reaction in the hydrolysis solution, after 90 minutes, it solidifies to form a solid phase, which can be used as a feed product without additional processing. The yield of the useful product in relation to the initial mass of the waste is 99%. Evaluation of the biological properties of the obtained product using the test organism Tetrahymen pyriformis showed that the biological value of the calcium-protein feed additive obtained by the proposed method with respect to fish meal at a titer of 0.15 mg / ml is 88.897-98.430%, the biological value The feed additive obtained according to the prototype is 41.667-54.054%, the biological value of m for the juicy flour is 65.672 94, 439%. Thus, the biological value (digestibility) of the calcium-protein feed additive is 1.9 times higher than the feed additive obtained by the prototype method, and in relation to feed of animal origin it is slightly inferior to fish meal and exceeds the bone meal. Experiments on animals show that a calcium-protein feed additive allows replacing feed of animal origin (juice and fish meal) in the diet of broilers and 30% protein in the mixed feed of fattening pigs, without lowering

while the average daily weight gain of animals. The biochemical, physiological and pathological-anatomical indicators of the broiler and fattening pig organisms of the experimental group do not differ from the control group.

In tab. 2 shows some biochemical indices of meat from animals that received a calcium-fir nutritional supplement.

Using the proposed method will simplify the process5, 90

Experienced

Broilers

Control 5.96

Fattening, 29

Experienced

Control 6.29

Pigs

chesky scheme and reduce the processing time of tanned skin waste, which naturally affects labor productivity, reduce reagent consumption, eliminate the formation of technological discharges, i.e. creates waste-free technology, and prevent environmental pollution, increase the yield and nutritional value of the product, which will reduce the protein deficiency in the diet of animals.

Table 2

1,210 Transparent, pale blue

1,224 Transparent, pale blue

1,210 Transparent, pale blue

1,215 Transparent, pale blue

Claims (1)

METHOD FOR PRODUCING FODDER ADDITIVE FROM TUBED WASTE OF LEATHER PRODUCTION, including thermo-acid hydrolysis of wastes and their subsequent neutralization, characterized in that, in order to • increase the nutritional value of the feed additive, the hydrolysis of wastes is carried out to a pycnometric density of hydrolysis solution of 37.10 g / g 1 ^ at a sulfuric acid concentration of 3.0-3.1% for 3060 minutes at a temperature of 96-98 ° C, and neutralization is carried out by calcium carbonate, taken in an amount of 2.5-3.0% of the hydrolysis solution volume.