An Improved Manufacture of Artificial Food for Swine, Cattle, and the like.
Year: 1896

page_text: Date of Application, 28th Nov., 1896-Accepted, 20th Mar., 1897
COMPLETE SPECIFICATION.
An Improved Manufacture of Artificial Food for Swine, Cattle,
and the like.
We, SÖREN PETER SÖRENSEN, of Vejle, Dairyman, and AAGE PHILIP
HEYMAN (trading as Philip W. Heyman) of No. 100, Gefionsgade, Copenhagen,
Merchant, both in the Kingdom of Denmark, do hereby declare the nature of
this invention and in what manner the saine is to be performed, to be particularly
described and ascertained in and by the following statement :-
This invention relates to a process for the manufacture of an artificial food or
forage consisting of blood, molasses and grain or bran the said food being specially
intended for swine and cattle, although it may also be used for feeding horses,
poultry, dogs, etc.
According to our invention blood is well stirred up or agitated in a vessel and
heated. During this process an addition of from 10-25% of water is made to
the blood.
The thin liquid is then poured through a filter into a second vessel in which the
heating is continued until the temperature of the liquid has reached about 75° C.
In order to keep the mixture in a liquid state an alkaline solution is added to it
during the heating process. A quantity of weak or dilute non-injurious acid such
as strongly diluted acetic acid is then added and the heating is continued until a
temperature of 100° C. is attained. The solid constituents of the blood will then
be precipitated and form a comparatively solid mass, separated from the water and
urea, the latter remaining in the solution.
In order to remove the liquid the mass is compressed in a press of suitable
construction.
The solid mass, after having been crushed or ground in a mill or in any other
suitable machine, is mixed with molasses and ground grain or bran in a proportion,
dependent upon the nature of the food required. In practice we have found the
following proportions of the above ingredients to give good results, viz. :-
For dogs
For poultry
For horses
-
For cattle
and swine
either
or
-
-
50 per cent. of prepared blood and 50 per cent. of
molasses.
50 per cent. of prepared blood, 25 per cent. of molasses
and 25 per cent. of corn.
37 per cent. of prepared blood, 25 per cent. of molasses
and 37 per cent. of corn.
25 per cent. of blood, 25 per cent. of molasses and
50 per cent. of corn
25 per cent. of blood, 50 per cent. of molasses and
cent. of hay or straw.
25
per
With regard to the quantity of alkaline solution, added to the blood-mixture
during the first heating-process and also to the quantity of the weak acid, added
later, no precise indication need be given, as either of these substances may be
used in greatly varying proportions without the final product being materially
affected.

page_text: As an example, however, it may be stated that under ordinary conditions a
solution of from 50-75 grammes of borax or bicarbonate of soda and from
50-75 grammes of acetic acid (of 80%) diluted with 6-8 kils. of water may be
added to 500 kilg. of blood. Much larger quantities of these substances may,
however, be used without materially altering the final product.
If for example to 500 kilg. of blood we add 500 grammes of acetic acid diluted
with water and 2.500 kilg. of bicarbonate of soda, the greater part of the acetic
acid is neutralized by the soda and the resulting product is therefore about the
same as when using smaller quantities of the said substances.
By treating the blood in the manner above described considerable advantages
are gained over ordinary processes where blood is utilized.
For example, dirt, hair, manure, urea, etc., which it is impossible to prevent from
being mixed with the blood, especially that obtained by the slaughtering of swine
and which substances are injurious to the health of the animals that eat the food,
are, by the above-mentioned process removed from the product, as hair and
similar substances are removed from the blood when in a liquid state, whilst the
urea etc., is dissolved in the water and flows away with this. In order to ensure
that the urea has been completely removed the blood-mass may after compression
be washed one or more times with fresh water.
By heating the blood to about 100° C. we further ensure that noxious bacilli,
possibly contained therein, for instance the tubercle-bacilli, are killed and thus
rendered harmless. Our food, therefore, is possessed of considerable advantages
also from the sanitary point of view.
Furthermore the blood is so heated that the albumen contained therein does not
lose its nutritive qualities nor is it wholly destroyed, which is generally the case
when the blood is dried in ovens or in machines without any preliminary
treatment.
Experiments made with food prepared as above described have shewn that its
nutritive value is about 50% greater than that of pure barley and that the
quality of the meat from animals, fed with this food, is high.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. An improved process for the manufacture of an artificial food containing
blood, such process consisting in mixing the blood with water precipitating the
solid constituents by adding to the thin blood-solution when heating it by successive
operations to about 75° C., suitable quantities of alkali and weak acids, in then
further heating the whole mass to about 100° C., in separating the solid mass from
the liquid and in drying and mixing it with molasses, grain, bran or similar
substances in quantities proportionate to the quality of food required, substantially
as hereinbefore described.
2. In a
process of the kind described in Claim 1 the addition of from
50-75 grammes of alkali (borax, bicarbonate of soda or a similar substance) and
from 50-75 grammes of acetic acid (80%) diluted with from 6-8 kils. of water
to 500 kilg. of diluted blood.
Dated this 28th dow of NT
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.