Method of and Apparatus for Producing Clear Wort.
Year: 1892

page_text: Date of Application, 15th Mar., 1892-Accepted, 21st May, 1892
COMPLETE SPECIFICATION.
Method of and Apparatus for Producing Clear Wort.
We GUSTAVE SOBOTKA, citizen of Austria, residing at 234 Fifth Avenue, New
York, in the County of New York, and State of New York, Chemist, and
ADOLPH KLIEMETSCHEK, citizen of Austria, residing at 647 Buren Street,
Baltimore, in the County of Baltimore, and State of Maryland, Chemist, do
hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
Our invention relates to improvements in the method of and apparatus for
producing clear wort; and the object of the invention is to provide a simple and
efficient method and apparatus by which clear wort may be obtained at a
single pressing of the first mash in the process, thereby dispensing with a number
of pressings which are required in practising methods and by the use of apparatus
such as have heretofore been proposed, and thus effecting a great saving of time and
labor, and at the same time rendering it possible to obtain from a given quantity of
material a quantity of clear wort greater in amount than can be obtained from the
same amount of material treated according to previous methods, and also of
superior quality.
According to previous methods, it has been the practice to steep ground malt in
cold water and extract the solution of the ground steeped malt by means of a filter
press; this operation being known as the first pressing. Such malt extract solution
has then been mixed with finely ground rye or other grain, and to this mixture has
been added a liquid solution obtained by mixing the cakes of grain taken from the
first pressing and those taken from the third pressing by a previous mash, with
water, and boiling the same under high pressure, and then pressing out the liquid
(the latter pressing being known as the second pressing) and finally pressing this
mixture containing the added liquid for the purpose of obtaining a clear wort; the
latter pressing being known as the third pressing.
By our present method we prepare a mash from which clear wort is extracted
by the first pressing in the process, and the cakes of grain taken from such pressing
are subjected to a cooking process and forced into a filter press from which the
dissolved starch and albuminous substances are allowed to run into the mash tub for
use in a subsequent mash, while the cakes of grain remaining in the press after
such second pressing are removed and used for cattle food. We thus dispense
altogether with the third pressing which has been necessary in obtaining clear wort
in accordance with previous methods.
The accompanying drawing represents a side elevation, partly in section, of an
apparatus such as we propose to use in carrying out our process, but it will
be understood, of course, that the construction and arrangement of the apparatus
may be varied at pleasure, and that the process may be practiced in a number of
ways and by the use of any suitable apparatus adapted to carry the same into effect;
the apparatus shown being only a preferred form.
A, denotes a mash tub, B, a filter press communicating with said tub by means of
a pipe b; C, denotes a tank or "cooker" which is connected with the press B, by
means of a pipe c; D, denotes a filter press into which a pipe d, leads from a
pump E. F, denotes a fermenting vat which is connected with the filter press D,
by means of a pipe f. ', denotes a pipe which connects the mash tub A, with the
pump E, and said tub is connected to the filter press D, through the pump E, by
means of the pipes d, d'.
With an apparatus constructed as thus described and provided with the necessary
valves for cutting off and controlling the flow of the liquid, we commence operations

page_text: by placing in the mash tub A, ground rye and corn malt mixed with water, and
this mixture is thoroughly agitated and heated to the desired temperature for the
mash by forcing steam into the mixture, and after allowing the mash to stand a
sufficient time, usually about two hours, the contents of the tub are forced by the
pump E, through the pipes d, d', into the filter press D, from which the clear wort
is conducted by means of the pipe f, and a suitable coil or cooling apparatus into
the fermenting tub F. The cakes of grain remaining in the press D, are taken
therefrom and placed in the tank or "cooker" C, and mixed with water which is
heated and forced therefrom by steam pressure while boiling hot into the filter
press B, through the pipe c, so as to separate therefrom the liquid starch and
albuminous substances in solution which are conducted by means of the pipe b, into
the mash tub A, which will contain a sufficient quantity of corn malt, rye and water
to be heated to the desired temperature by the liquid contents of the "cooker,"
thus conducted into the same; the heat of the said solution being used to bring the
contents of the mash tub to the temperature necessary for saccharification. After
the saccharification is completed the mash is pumped in the manner previously
described by the pump E, into the filter press D, for the purpose of obtaining a
perfectly clear wort, which is allowed to run into the fermenting tub F, through
the pipe, and cooling apparatus, as above described. The cakes of grain taken
from the filter press B, are removed and may be used as cattle food.
It is possible to obtain good results by extracting the hot liquid from the boiled
mixture without running it through a filter press; an ordinary filtering apparatus
being used for this purpose without subjecting the mixture to pressure, but in order
to produce satisfactory results and thoroughly extract the liquid contents of the
"cooker" we preferably use a filter press, although we do not desire to limit our
invention to this specific method of extracting the hot liquid.
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 :-
First-The herein described process of making clear wort, which consists, first,
in mixing corn malt, rye and water, second mingling with this mixture a hot liquid
extracted from a boiled mixture of water and cakes of grain taken from the first
pressing of a preceding mash, and finally pressing the latter mixture to obtain clear
wort, substantially as described.
Second-The process of making clear wort, which consists, first, in mixing corn
malt, rye and water, second, mixing the cakes of grain of the first pressing by a
previous mash with water and boiling this mixture, third, pressing the boiled
mixture and mixing the hot liquid obtained by such pressing with the mixture of
corn malt, rye and water, and finally pressing the latter mixture to obtain a clear
wort, substantially as described.
Third: The combination of the mash tub, the pump, the filter press, the pipes
connecting said mash tub and filter press through said pump, the "cooker" and a
second filter press connected by suitable pipes to said cooker and mash tub,
substantially as described.
Dated this 23rd day of Januar 1900