MANUFACTURING METHOD OF THE STEVIA-EXTRACTS
Technical Field
The present invention relates to a method for manufacturing Stevia
extract.
Background Art
Stevia is chrysanthemum perennial. Its origin is South America and is
well grown in shadow. Stevia has sweet taste 200 times of sugar. It does not
have any toxic, so that it has been used as natural sweetening agent or diet
food. Heating does not change physical property of Stevia. Therefore, raw
leaves or dried leaves of Stevia have been used for tea and have been used as
sweetening agent for food.
Stevia has a very good role for diabetic patients or persons who do diets. However, when Stevia is used in a conventional method, Stevia can be
used only when it is alive. Namely, it cannot be used in winter season. For example, in winter season, dried leaves of Stevia may be used, but its efficacy is bad. Since raw leaves or dried leaves are directly used, there are many inconveniences for storing or using the dried or raw leaves.
Disclosure of Invention
Accordingly, it is an object of the present invention to overcome the
above-described problems encountered when using Stevia.
To achieve the above objects, there is provided a method for
manufacturing Stevia extract, comprising a grinding step in which Stevia leaves
having more than 30cm sizes are collected, and a ground or crushed mixture
formed of a grain state material and a liquid state material are mixed is
manufactured; a first separation step for manufacturing a first extract passed
through the through holes of a filter by centrifuge-processing the ground or
crushed materials using a centrifuge having the filter; a second separation step
for filtering the first extract obtained in the first separation step through the filter
and manufacturing a second extract through the through holes of the filter; a
promotion step for heating the second extract obtained in the second separation
step and cooling the same at a room temperature and promoting an
engagement of the same component materials; a third separation step for
filtering the promotion material processed in the promotion step using the filter and producing a third extract passed through the through holes of the filter and micro materials not passed through the filter; a concentrating step for repeatedly
filtering the micro materials not passed through the filter in the third separation step using water and obtaining diluted solution passed through the through
holes of the filter and heating and concentrating the diluted solution for
thereby manufacturing concentrated extract; a fermenting step for mixing the
third extract obtained in the third separation step with the concentrated material
obtained in the concentrating step for thereby obtaining a mixture and inputting
the micro material obtained in the third separation step and the fermenting
agent into the mixture and fermenting the same for 24 hours at a room
temperature; and a seasoning step for seasoning the materials fermented in the
step for more than 60 days.
Brief Description of Drawings
The present invention will become better understood with reference to
the accompanying drawings which are given only by way of illustration and thus are not limitative of the present invention, wherein;
Figure 1 is a view of a process according to the present invention.
Best Mode for Carrying Out the Invention
The method for manufacturing Stevia extract according to the present invention will be described with reference to the accompanying drawings.
In the present invention, Stevia raw leaves having sizes of over 3cm are
collected and ground using a grinder or crushing machine or millstone
in a grinding step S1 .
At this time, Stevia should be preferably grown with leave sizes of 3cm.
After collecting leaves, they are washed using water. After the above steps are
finished, the leaves are well ground using a grinder or crushing machine or
millstone for thereby producing ground or crushed materials mixed with solid
and liquid materials and having certain viscosity.
In a first separation step S2, a first extract is produced from the ground
or crushed leaves using a centrifuge. In the above process, the centrifuge having a filter with through holes is
used. The sizes of the through holes of the filter are preferably 110(mesh) ~
130(mesh). In this process, stems of large leaves are filtered from the leaves
ground or crushed in the grinding step.
Therefore, when the sizes of the through holes of the filter exceed 110(mesh), the materials having relatively large sizes such as stems of leaves pass through the through holes of the filter. When the sizes of the through holes of the filter are smaller than 130(mesh), micro particles are mixed with liquid having certain viscosity in the liquid material in the ground or crushed Stevia materials, so that they do not pass through the through holes of the filter. In addition, in a second separation step S3 for manufacturing second
extract, the first extract separated from the first separation step is
passed through the filter.
At this time, the sizes of the though holes of the filter are 170(mesh) ~
190(mesh). In the above step, particle materials are filtered again in order to
selectively obtain needed materials from the first extract in which large size
materials are first filtered.
Therefore, when the sizes of the through holes of the filter exceed
170(mesh), large size materials pass through the through holes for thereby
resulting in failure. When the sizes of the through holes are smaller than
190(mesh), the sizes of the through holes are too small to pass the materials
having sizes needed in the present invention. Therefore, the first extract is
filtered again for thereby obtaining second extract through the above step.
In addition, the second extract obtained through the second separation
step is heated for thereby promoting an engagement of the same component in
a promotion step S4.
In this step, the engagement of the same components is promoted in
such a manner that various materials included in the second extract in separate
form are heated, and the molecules are activated. Therefore, in this step, the
second extract obtained through the above steps is stored in a certain container
and is directly heated using a heating source.
At this time, the conventional heating source and the container are used.
When the temperature of the second extract reaches at 80°C ~ 100°C while
storing the second extract into the container and heating the same, the heating
is stopped. When the temperature of the heating is below 80°C in this step, the
materials of the same component do not well engage with each other. When the
temperature is above 100°C, the components included in the second extract
stored in the container may be burned or melted and attached.
Therefore, the present invention has a third separation step S5. In this
step, the materials passes through the promotion step S5 are filtered using a
filter, and the third extract passed through the filter and the micro material
(micro ingredient) not passed through the filter are obtained in the third
separation step S5.
At this time, the sizes of the through holes of the filter are preferably
240 (mesh) -260 (mesh), and the filter may be made of metallic materials such as
stainless or fiber materials.
When the sizes of the through holes of the filter used in this step are larger than 240 (mesh), the sizes of the same are too large, so that the components that are not needed in the present invention pass through the
through holes of the filter. When the sizes of the through holes of the
filter are smaller than 260 (mesh), the components needed in the present
invention do not well pass.
After the steps of the present invention are performed, the materials are
separated into the third extracts passed through the through holes of the filter
and the micro materials not passed through the filter.
In the present invention, a step for compressing the filter may be
selectively adapted in order to fabricate a needed amount of the extracts.
In addition, in a concentrating step S6, the micro materials not passed
through the filter in the third separation step are repeatedly filtered for thereby
producing diluted solution. Thereafter, the diluted solution is concentrated.
In the above step, a small amount of effective components mixed or
attached between the micro materials not passed through the filter in the third
separation step S5 is filtered again. In the above step, water is repeatedly poured onto the micro materials attached to or gathered at the surface of the filter, not passing through the
through holes of the filter as a result of the third separation step S5, so that diluted solution having water as major component and a small amount of effective component is obtained. The thusly obtained diluted liquid is stored in a certain container and is
heated for thereby producing a concentrated liquid. Preferably, the diluted liquid
of 10 liters is heated at a temperature of 100°C for three hours and is cooled at
room temperature. The concentrated liquids are prepared based on the cooling
method. The concentrated liquid obtained in the above step and the third extract
are agitated for thereby producing a mixture. Molasses and fermenting agent
are inputted into the mixture and are fermented in a fermenting step S7.
At this time, the mixing ratio of the concentrated liquid and the third
extract that form a mixture is determined by agitating the concentrated liquid
and third extract based on the amount selected by the user.
The micro materials of 3~5weight% obtained in the third separation step
and the fermenting agent of 3~7weight% are inputted into the mixture, and the
resultant mixture is fermented for 24 hours at a room temperature for thereby
producing fermented material. The fermenting agent used in the present invention is one of the known
materials such as yeast or molasses generally used for fermentation.
In the present invention, Stevia extract is manufactured through a seasoning step S8 in which the fermented material in the above step is seasoned. In the seasoning step, the fermented material obtained in the fermenting step S7 is seasoned for above 60 days at room temperature for thereby manufacturing Stevia extract.
At this time, when the seasoning period is shorter than 60 days, the
fermented material processed through the fermenting step is not fully seasoned.
Therefore, it is preferred to season for more than 60 days. The seasoning step
is performed at room temperature under dark environment.
The amount of Stevia extract manufactured according to the present
invention is selectively determined based on the effective component of Stevia
known as useful sugar source that is non-harmful and good for human body.
Industrial Applicability As described above, Stevia extract according to the present invention
can be used at any place and any time whenever a user wants to use it. Since it
is made in extract form, a small amount of Stevia extract can be used by diluting
the same. Even when only a small amount of Stevia extract is used, it is possible to maximize the effect with its good convenience in use. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described examples are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds
are therefore intended to be embraced by the appended claims.