An Improved Method of Utilizing and Means for Treating Yeast.
Year: 1893

page_text: Date of Application, 24th Oct., 1893
Complete Specification Left, 24th July, 1894-Accepted, 15th Sept., 1894
PROVISIONAL SPECIFICATION.
An Improved Method of Utilizing and Means for Treating Yeast.
We, EDWARD WILLIAM GREENING of Thames Ditton in the County of
Surrey and EDWARD OWEN GREENING of Oak Lawn Belmont Grove Lee in
the County of Kent do hereby declare the nature of this invention to be as
follows:-
Our invention relates to the utilization of brewers' yeast whether in a fresh or
stale condition and consists in a method and means for treatment by which its
fermentation is stopped and by which it may be converted into a sweet and
permanent material of considerable commercial value.
From fresh yeast a material is produced suitable for mixing with other material
as a food cattle. While from stale, dirty and decomposed yeast a material is
obtained which can be used either alone or mixed with other materials as a
manure.
•
To carry our invention into effect we take the waste yeast which contains
about 75% to 80% of moisture and dry the same until the moisture is reduced
under 10%
The drying may be done in
We find it convenient to dry
the material upon steam heated rollers which at the same time are so adjusted to
one another and rotated as to draw the material between the said rollers and to
crush and squeeze the same.
any
suitable manner.
.
The material forming a thin film on the heated surface of the rollers the moisture
readily evaporates from it. The material is then scraped off the rollers by a
suitably arranged knife or knives. The material falls from the knives in thin flakes
which can be automatically collected in suitable trough conveyors which by
continually stirring and turning permits it to cool. These dry flakes can then be
easily ground to powder of any desired degree of fineness.
The meal
The effect of this drying and heating arrests all fermentation.
produced from fresh yeast is exceptionally rich in albuminous matter, and contains
other valuable feeding properties and having also the tonic principle of the hops
with some salt remaining in it the meal is most serviceable for admixture with
other substances to increase their feeding value and flavour as food for cattle. It
can be sold mixed with other substances either as feeding meals or pressed
into cakes.
The material produced by the same means from either fresh or dirty, stale and
decomposed yeast forms a valuable manure as it contains a high percentage of
nitrogenous matter and a considerable amount of phosphates, potash and other
fertilizing material. It can be sold and used either by itself or mixed with other
fertilizers.
100- Ondaha-1902

page_text: COMPLETE SPECIFICATION.
An Improved Method of Utilizing and Means for Treating Yeast.
We, EDWARD WILLIAM GREENING of Thames Ditton in the County of
Surrey, Business Manager, and EDWARD OWEN GREENING of Oak Lawn,
Belmont Grove, Lee, in the County of Kent, Business Manager, 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 the utilization of yeast, resulting from the operations
of brewing or other cognate industries, whether in a fresh or stale condition,
and consists in a method and means for treatment by which its fermentation is
stopped, and by which it may be converted into a sweet and permanent material
of considerable commercial value.
From fresh yeast a material is produced suitable for mixing with other materials
as a food for cattle.
While from stale, dirty and decomposed yeast material is obtained, which
can be used, either alone, or mixed with other materials, as a manure.
To carry our invention into effect, we take the waste yeast which contains
about 75% to 80% of moisture, and dry the same until the moisture is reduced
under 10%
The drying may be done in any suitable manner.
We find it convenient to dry the material upon steam heated rollers, which
are a known form of apparatus as applied to other purposes, and which at the
same time are so adjusted to one another and rotated as to draw the material
between the said rollers, and to crush and squeeze the same.
The material forming a thin film on the heated surface of the rollers the
moisture readily revaporates from it. The material is then scraped off the rollers
by a suitably arranged knife or knives, as at present known in other processes.
The material falls from the knives in thin flakes which can be automatically
collected in suitable trough-conveyors, which by continually stirring and turning
permits it to cool. These dry flakes can then be easily ground to powder of any
desired degree of fineness.
The effect of this drying and heating arrests all fermentation.
The meal produced from fresh yeast, is exceptionally rich in albuminous matter,
and contains other valuable feeding properties, and has also the tonic principle of
the hops, with some salt remaining in it.
The meal is most serviceable for admixture with other substances to increase their
feeding value and flavour as food for cattle.
It can be sold mixed with other substances either as feeding meals, or pressed
into cakes.
The material produced by the same means from dirty, stale and decomposed
yeast forms a valuable manure, as it contains a high percentage of nitrogenous
matter, and a considerable amount of phosphates, potash, and other fertilizing
material.
It can be sold and used either by itself, or mixed with other fertilizers.
In preparing yeast for food, it is of course advisable to have it as fresh as
possible, but in converting it into a manure it is preferable to permit it first to
decompose.
Having now particularly described and ascertained the nature of this said
invention, and in what manner the same is to be performed, we declare that what
we claim is.
1st. The utilisation of fresh yeast as food for cattle, by the drying of the yeast

page_text: on steam-heated surfaces, until the moisture is reduced to 10%, and the fermen-
tation arrested; and by the pulverization of the dried product into meal,
rendering it suitable for admixture with other substances, to increase their feeding.
value and flavour, substantially as described.
2nd. The utilisation of stale and decomposed yeast, as manure, by the drying of
the decomposed yeast on steam-heated surfaces until the moisture is reduced
to 10%, and by the pulverisation of the dried product, rendering it serviceable,.
either alone, or with other substances, as fertilizer, substantially as described.
Dated this 24th day of July 1894.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicants.