DE2548641B2 - Process for the production of high protein feed from raw materials containing starch - Google Patents

Description

The invention relates to a method of manufacture of high protein feed made from starch and protein containing raw materials.

Protein-containing animal feed is now in short supply worldwide.

Many attempts and methods are available to convert such proteins in the form of yeasts on different To produce raw materials such as paraffins, methanol, ethanol etc.

All of these processes have the disadvantage that they are still too expensive today, and that such yeasts and Bacterial proteins are not - or not yet - approved for use as animal feed.

The other raw products such as sugar, molasses, glucose etc. are too expensive as raw materials, although they are included the yeast fermentation results in products which are known and as feed resp. Food approved are.

It has now been found that raw products such as wheat, barley, rye, potatoes, which are rich in Carbohydrates are and at the same time contain 5 to 15% native protein substance, in a simple and cheap way can be transformed into yeasts, while at the same time preserving the native protein substance, which the End product gives a very high protein value.

The object of the invention is to provide a method for inexpensive manufacture Protein-containing feed made from starch and protein-containing raw materials.

The solution to this problem is characterized in claim 1. Advantageous refinements result from the subclaims.

The grinding takes place dry, i. a. but preferably carried out wet, with a separation the exposed fibers in the raw material can take place before or after hydrolysis. The hydrolysis takes place either with an acid or amylase, or with a mixture of both.

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The concentration of the raw fermentation mixture can be adjusted either by direct evaporation, resp. Drying takes place or by separation by means of ultrafiltration to prevent water evaporation to save.

The invention is explained in more detail with advantageous details using two examples using a drawing, in which the F i g. 1 and 2 each show a flow diagram of a plant for carrying out the method according to the invention demonstrate.

According to FIG. 1 are cereals, for example barley or wheat, which contain about 65 to 70% carbohydrates and 8 to 15% native protein, ground in a mill 1 or directly in the pre-soak 2 introduced and mixed with water. Under certain circumstances, premilling can be dispensed with.

After the pre-soaking has ended, the cereals are finely ground in a wet mill 3 and passed through a sieve 4 any coarse particles removed. promoted and mixed with acid from a storage container 5 or amylase from a storage container 7. In The hydrolysis is carried out in the stirred tanks 6 and 6 '. The reaction takes place in one Boiler while the other is being filled or emptied. The hydrolysis product, which is predominantly sugar contains, a second sieve 8 is used to separate any fiber components and undissolved substances out and then placed directly in a fermenter vessel 9. The fermenter 9 is one of a kind Motor 11 driven agitator 10 equipped. In the fermenter 9, the sugar is under strong ventilation ventilated from an air source, not shown, via a pipe 12. The fermenter 9 is with all required, not shown control and regulating devices provided. One by means of an electric motor

14 driven mechanical foam separator 13 is located in the upper part of the fermenter 9 the fermenter 9 exiting mixture of yeast and native protein (or easily degraded Fiweiß) adjusted to the desired pH, concentrated in a multi-stage evaporator 16 and in one Drum dryer 17 is dried and filled into sacks 18, for example.

In the embodiment according to FIG. 2 barley is pre-ground in a raw mill 1 and extracted with water a container, not shown, via a line 19 continuously into a mixing container 20 with a Mixing device 21 promoted. In the wet; nühle 3 will homogenized and promoted the homogenate in the hydrolysis tank 6 and with acid or enzymes from one Container, not shown, offset via a line 22. When the hydrolysis is complete, the hydrolyzate pumped directly into the fermenter 9 by means of a metering pump 24 and with strong ventilation hapless. The pH value adjustment takes place in the fermenter with ammonia from a storage container 25 via a line 26. The yeast obtained is via a line

15 fed to the evaporator 16. The pH can be adjusted again in a buffer vessel 27.

The further work-up takes place as in the example according to FIG. 1.

From 100 kg of raw material, depending on the content of fiber components, 65 to 80 kg of protein concentrate are included 55 to 68% protein content obtained.

For this purpose 2 sheets of drawings

Claims (4)

Patent claims: 1. Process for the production of high protein feed from starch and protein Raw materials, especially from cereals, a mixture of cereals and other raw materials containing starch and / or whey and / or alcohols, thereby characterized in that the raw materials together with the native protein substances contained in them first grind, then subjected to starch hydrolysis with the simultaneous addition of water, then deepened as a mixture in a known manner by fermentation and finally dried will. 2. The method according to claim 1, characterized in that the hydrolysis takes place with acid. 3. The method according to claim 1 or 2, characterized in that the hydrolysis with amylase successes. 4. The method according to any one of claims 1 to 3, characterized in that the fermentation product is pre-concentrated by ultrafiltration before drying to final moisture