CH628213A5 - Process for producing a pourable feedstuff from skimmed milk powder denatured with fishmeal - Google Patents

Description

The invention is illustrated by the following examples:

example 1

71.5 parts by weight of skimmed milk powder and 28.5 parts by weight of fish meal are mixed with one another using a Heesen mixer.

Then 0.7 part by weight of precipitated and spray-dried silica, based on the entire skimmed milk powder mixture, are mixed in.

The feed obtained in this way can be ensiled for months.

The silica mixed, precipitated and spray-dried with the skimmed milk powder mixture according to Example 1 has, in addition to the physico-chemical characteristics mentioned, an average size of the secondary particles of 80 μm, a tamped density (according to DIN 53 194) of 200 g / l and a BET surface area ( DIN 66 131) from 190 m2 / g.

Example 2

70 parts by weight of skimmed milk powder and 30 parts by weight of fish meal are mixed together using a Heesen mixer

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Then 0.7 part by weight of precipitated and spray-dried silica, based on the entire lean milk powder mixture, is mixed in.

The feed obtained in this way can be ensiled for months.

The silica mixed, precipitated and spray-dried with the skimmed-milk powder mixture according to Example 2 has, in addition to the physico-chemical characteristics mentioned, an average size of the secondary particles of 10 μm, a tamped density (according to DIN 53 194) of 200 g / l and a BET surface area according to DIN 66 131 from 190 m2 / g.

Claims (2)

628213 PATENT CLAIMS 1. Process <for the production of a free-flowing feed from skimmed milk powder denatured with fish meal, characterized in that a precipitated, spray-dried silica with a BET surface area according to DIN 66 131 of 100-500 m2 / g is mixed with the denatured skimmed milk powder. 2. The method according to claim 1, characterized in that the precipitated, spray-dried silica has the following chemical-physical characteristics: BET surface area according to DIN 66 131 190 m2 / g Drying loss according to DIN 55 921, Dried for 2 hours at 105 ° C. 6% by weight Loss on ignition according to DIN 55 921, annealed for 2 hours at 1000 ° C, based on the substance dried for 2 hours at 105 ° C 5% by weight pH value according to DIN 53 200, in 5% by weight aqueous dispersion 6.3 Oil number according to DIN 53 199 300 average particle size of the primary particles 18 nm Skimmed milk powder made from skimmed whole milk, e.g. by spray drying, is usually intended for human consumption. It has only been released for livestock feed in connection with government subsidy measures on the condition that it is denatured in order to avoid misuse. Fish meal with a moisture content of 8 to 10% is generally used as a denaturing agent. The denatured skimmed milk powder mixture thus obtained consists of approx. Vi% skim milk powder and% H fish meal. However, due to the high moisture content, this mixture cannot be ensiled for longer than 20 minutes. After that, the mixture is no longer free-flowing. It is known to improve the silage capacity by about 4% by weight of naturally occurring silicas or silicates, e.g. Add diatomaceous earth to the denatured skimmed milk powder mixture. The effect of this additive is unsatisfactory, however, because with this additive it is necessary to mine the stored product after a long silage period. The high addition of 4% by weight of naturally occurring silicas or silicates, e.g. Diatomaceous earth also has the disadvantage that this large proportion of inert substance means that the energy balance of the skimmed milk powder mixture used as animal feed is unfavorable, i.e. feed conversion is not optimal. It is an object of the present invention to provide a process for producing a free-flowing feed from skimmed-milk powder denatured with fish meal, which does not have the disadvantages described above. This object is achieved by the method according to the invention and defined in claim 1. In a preferred embodiment of the process according to the invention, a precipitated, spray-dried silica is used, which has the following chemical-physical characteristics: Surface according to BET (DIN 66 131) 190 m2 / g Loss on drying DIN 55 921 (2 h at 105 ° C) 6% by weight Loss on ignition DIN 55 921 (2 h at 1000 ° C, based on the 2 h dried at 105 ° C Substance). 5% by weight pH value DIN 53 200 (in 5% by weight aqueous dispersion) 6.3 Oil number (DIN 53199) 300 Average size of the primary particles 18 nm The precipitated, spray-dried silicic acid contained in the feed produced according to the invention can have various mean sizes of the secondary particles (determined from electron microscope images). In preferred embodiments, the silica has average secondary particle sizes of 10 or 80 μm. Accordingly, the tamped weights (according to DIN 53 194) of the preferably used silicas can be 100 or 200 g / 1. These silicas are products from Degussa and are commercially available under the name “Sipernat” 22 or 22S. The silica can be made with the denatured skimmed milk powder mixture, which can consist of 65-75% by weight of skimmed milk powder and 25-35% by weight, based on the skimmed milk powder mixture without the addition of silica, in quantities of 0.2 -3% by weight and in a preferred embodiment 0.4-0.8% by weight, based on the entire skimmed milk powder mixture. Silage tests show that a content of 0.7% by weight of silica results in optimal pouring properties of the skimmed milk powder mixture denatured with fish meal, i.e. at minimal quantities. added silica, an optimal improvement of the silage properties of the denatured skimmed milk powder mixture is achieved, whereby the inert portion disturbing the energy balance of the skimmed milk powder mixture used as animal feed can be kept extremely low. The feed runs out of the silo even after a long storage period and does not need to be mined.