HU199659B - Process for producing fodder additive containing animal protein easy of digestion - Google Patents

Abstract

The present invention relates to a process for the preparation of a good digestible feed additive comprising animal protein, wherein the keratin-containing animal, in particular slaughterhouse waste, is heat-pressed in the presence of ammonium thiocarbamate and / or urea and water, the resulting liquefied mixture is mixed with low starch-containing shredded plant materials and dried. . Known feed components are added to the flour-like feed additive thus obtained. EN 199659 A Scope of description: 3 pages without drawing -1-

Description

The present invention relates to a process for the preparation of a highly digestible animal protein feed additive.

Several processes are known for the preparation of feed additives from toluene or other high-keratin materials. A common feature is that they intend to improve the digestibility of the keratin protein by heat treatment, optionally using various additives. For example, according to U.S. Patent 4,672,073, poultry feathers are cooked under high pressure in an aqueous medium. Various machine solutions for heat treatment and drying in the presence of water vapor are disclosed in U.S. Patent Nos. 3,617,317, 4,151,306 and 192,860. Other types of processes include heat treatment in the presence of additives to enhance the digestibility of high-keratin animal by-products. Thus, Hungarian Patent No. 155,389 uses dilute mineral acids, Hungarian Patent No. 177,975 sulfuric acid, U.S. Patent No. 124,942, mineral alkalines, and U.S. Patent No. 174,881, using base anhydrides. Keratin can also be digested enzymatically. Examples are U.S. Patents 4,473,589 and Hungarian Patents 193,037.

The disclosed processes relate to the production of keratin-containing flours, in particular feather flour, but the drying of heat-treated keratin-containing decoctions is carried out without drying aids, which may make the material gummy, difficult to dry and grind during drying. On the other hand, the methods described do not allow the production of highly digestible hair meal or horn meal. The methods cited are not intended to provide complete blends of highly digestible animal protein suitable for meeting the nutritional requirements of animals.

In developing the process of the present invention, it has been the object of the present inventors to facilitate the drying of animal protein decoctions and thereby to produce highly digestible feed components.

The process of the present invention is based on the discovery that the presence of low starch plant materials facilitates drying of animal protein decoctions containing the digested keratin and / or collagen and also improves the feeding effect of the resulting protein meal. The processing of slaughterhouse by-products into feed additives requires the discovery of keratin proteins, but the digested keratin tends to become gum-like during drying. It is also difficult to dry high-collagen decoctions which turn into a glue-like substance during drying.

The present invention relates to a process for the production of digestible feed additives containing animal protein by wet digestion of keratin-containing, in particular slaughterhouse waste in the presence of urea and / or urea derivative. The keratin-containing material of animal origin is 1 to 50 bar, preferably 4 bar, at a pressure of 0.1 to 20% by weight, preferably 1% by weight, of urea and / or ammonium thiocarbamate and

10 to 80% by weight, preferably 50% by weight, after the addition of water, is heated for 0.5 to 8 hours, preferably 60 minutes, so that the liquefied mixture thus obtained after releasing the overpressure is at least 10%, preferably 50% by weight, low with starchy vegetable flour, based on the dry weight of the mixture, and then milled during or after drying. The resulting high solids feed additive is preferably blended with feed components known per se in a proportion that results in a suitable feed for farmed livestock.

As animal raw material containing keratin, hair and / or wool and / or horn and / or feathers and / or brush waste are mixed with urea and / or ammonium thiocarbamate.

As a low-starch plant material, pre-dried chaff or flour and / or cereal kernels and / or kernel flour and / or furfural bran are added to the liquefied mixture.

Low starch vegetable flours do not germinate during the drying of the mixture and can be easily dried by digesting keratin.

The process can also be advantageously applied to the drying of broths produced during the cooking of high-collagen animal raw materials (e.g., bone, skin).

Drying can be carried out in landscape-based, continuous-action heated paddle shafts, but it is also preferable to use equipment that combines the drying and grinding operations (For example, an Atritor dryer). Dried flour can be used as a feed additive.

The invention is illustrated by the following examples:

Example 1

100 kg porcine hair with a water content of 20% is heated in a autoclave (disinfectant) with heating jacket and stirrer at a pressure of 4 bar in the presence of 2.5 kg of ammonium thiocarbamate and 2.5 kg of urea and 50 liters of water for 60 minutes with continuous mixing. After the overpressure has been eliminated, 100 kg of wheat bran are added to the still hot liquefaction medium with further continuous mixing and after 10 minutes of mixing, the mixture is dried in a drying machine. The resulting powdery product contains 40% crude protein with an in vitro pepsin digestibility of 70-80%.

Example 2

Example 1 except that 50 kg of pig hair and 50 kg of pig nails (slippers) were used as starting material.

-2EN 199659 A is used to which is added 1 kg of ammonium thiocarbamate. Instead of wheat bran we use corn flour.

EXAMPLE 3 10 kg of sheep wool, 10 kg of kitchen waste, 80 kg of poultry feathers, in the presence of 0.1% ammonium thiocarbamate and 70 liters of water, are treated at 2 bar with stirring for 2 hours. After the overpressure has been eliminated, a mixture of 10 kg of ground sunflower kernel, 10 kg of dried beet chips, 25 kg of alfalfa flour and 5 kg of furfural bran is added to the liquefied mixture with continuous stirring. The resulting material was transferred to a lying dryer with heated agitator blades and dried for two hours. After drying, the product obtained is ground to a uniform particle size with a hammer grinder. For 5 kg of the high solids feed additive obtained, 15 kg of 48% crude protein extracted soybean meal, 17 kg of wheat groats, 60 kg of corn groats, 1 kg of brewer's yeast, 5 kg of mineral and vitamin premix, 0.2 kg of DL-methionine, 0.8 kg L-lysine is mixed. The resulting homogenized mixture is used for poultry fattening.

The advantages of the present invention can be summarized by the fact that it is possible to process the hair and the feather so that such decoctions are rapidly dried. The products obtained by the process have a more beneficial nutritional effect than the protein meals produced so far because of the higher digestibility of the crude protein contained therein. The method allows the production of highly digestible animal protein feed additives, concentrates or compound feeds.

PATENT CLAIMS

Claims (2)

A process for the production of a digestible feed additive containing animal protein by wet digestion of keratin-containing animal waste, in particular slaughterhouse waste, in the presence of urea and / or urea derivatives, characterized in that: Animal materials containing 5 keratin at a pressure of 1 to 50 bar, preferably 4 bar, in the presence of 0.1 to 20% by weight of urea and / or ammonium thiocarbamate after addition of 10 to 80% by weight, preferably 50% by weight of water 10 0.5 to 8 hours, preferably for 1 hour with continuous stirring heated, liquefied mixture is obtained containing 10 weight percent, preferably 50%, low starch-containing vegetable flour stirred at ₁₅ calculated from the dry mixture after the termination of the overpressure and during drying or drying after grinding. The method of claim 1, wherein Characterized in that the animal keratin substance is mixed with pig hair and / or horn and / or wool and / or brush waste and / or feathers with urea and / or ammonium thiocarbamate. 25 3. The method of claim 1, characterized in that, previously dried chaff flour or low starch-containing plant material in a corn plant the liquefied mixture and / or cereal grains korpáit and / or husk flour are ³⁰ and / or dried répaszuetet and / or green vegetable meal preferably lucerne meal and / or furfural bran. '4. The method of claim 1, wherein ^Λ, characterized in that the high-solids feed of takarmánykompanensként cereal and / or legume seeds grated and / or grain for feed and / or food-products ⁰ two and / or minerals and / or vitamin premixes and / or an amino acid or amino acids, preferably lysine, methionine or derivatives thereof.