JP7104432B2 - Manufacturing method of colored powder for konjac - Google Patents

Description

The present invention relates to a method for producing colored powder for konjac used in producing konjac.

Konjac is a food that has been eaten in Japan for a long time. Generally, it is made by adding water and a coagulant such as calcium hydroxide to grated konjac and hardening it, and using konjac as a raw material. There is a method of producing by adding water and a coagulant such as calcium hydroxide to konjac powder and hardening it. Then, grated konjac potatoes and traditional konjac flour are appropriately mixed with konjac potato skin and starch, and the konjac skin and starch color the konjac color brown and the brown grains inside the konjac. It becomes. However, the current konjac is generally manufactured using white konjac powder (fine powder) from which the epidermis has been completely removed, and the konjac produced with such white konjac powder remains as it is. It becomes white. However, many consumers tend to prefer traditional brown konjac containing brown grains, and the distribution volume is higher for traditional brown konjac. Therefore, in order to produce brown konjac, it is generally practiced to add black to dark brown konjac colored powder to white konjac powder to color it.

As the colored powder for konjac, powder of "Ecklonia cava", which is a brown seaweed, is often used. However, the yield of "Ecklonia cava" has dropped sharply due to changes in seawater temperature due to global warming, the occurrence of rocky-shore dens, and the tightening of regulations due to nature maintenance, and the price has risen. It has become a big problem because it increases the material cost of powder. In response to this problem, the inventors of the present application have invented the food coloring agent described below [Patent Document 1] using coffee extract slag as a raw material and a method for producing the same.

JP-A-2002-51725

However, the food coloring agent made from coffee extract slag could not be used as a coloring powder for konjac due to a problem in its composition. Therefore, the inventors of the present application have made the invention described in [Japanese Patent Application No. 2019-138422] using tea leaves or tea leaves as a raw material. However, although colored powder using tea leaves or tea leaves can be used from the viewpoint of coloring, it is difficult to commercialize it because fine fibers are mixed in and the fibers look like foreign substances such as hair.

By the way, the surface layer portion including the epidermis of konjac potato when producing konjac powder (fine powder) is separated and removed as flying powder. Currently, most of this flying powder is used as fertilizer and feed, but most of it is disposed of as food industry waste.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for producing colored powder for konjac using flying powder, which is a food industry waste.

The present invention
(1) Acquisition step S200 for acquiring flying powder, which is a by-product of the production of konjac powder, and
In the water kneading step S202 in which water is added to the flying powder and kneaded,
In the molding step S204 of molding the hydroly squeezed flying powder into a predetermined shape,
In the drying step S206 for drying the molded flying powder,
A crushing step S208 for pulverizing dried flying powder to a size of 50 μm to 1200 μm, and
The above problem is solved by providing a method for producing a colored powder for konjac, which comprises a high temperature treatment step S210 for subjecting the crushed flying powder to a high temperature treatment to change the color until it becomes black or dark brown .

The method for producing colored powder for 蒟 蒻 according to the present invention is to produce colored powder for 蒟 using flying powder which is a by-product of the production of 蒟 璻 powder and is disposed of as food industry waste. Therefore, the raw material cost is extremely low, and the colored powder for konjac can be provided at low cost. In addition, since the food industry waste is reused, it can contribute to the reduction of waste, the reduction of food loss, and the protection of the global environment.

It is a flowchart of the manufacturing method of the colored powder for konjac which concerns on this invention.

The method for producing the colored powder for konjac according to the present invention will be described with reference to the drawings. Here, FIG. 1 is a flowchart of a method for producing colored powder for konjac according to the present invention. In the method for producing colored powder for 蒟 蒻 according to the present invention, first, flying powder, which is a by-product in the production process of 蒟 璻 powder (fine powder), is acquired (acquisition step S200).

Next, water is added to the obtained flying powder and kneaded (water kneading step S202). The kneading device at this time includes a kneading machine for konjac, a mixing machine for konjac, a ribbon blender, a continuous noodle-making humidifier, a noodle-making machine, a gapperetizer, an extruder, an extruder, a screw type mixer, a kneader, an extruder, etc. Any device may be used as long as the konjac powder can be kneaded. Further, the amount of water added at this time is an amount having a viscosity suitable for the kneading apparatus and the molding apparatus used in the next molding step S204, and is 10 wt% to 120 wt% with respect to one weight of the flying powder, and is approximately 60 wt% to 80 wt. %. Since the flying powder is fine particles of 70 μm or less, it is easy to scatter, and as it is, a dust mask, dustproof clothing, a dust remover, etc. are required for handling. However, by adding water and kneading in this water kneading step S202, the flying powder becomes a paste or a lump and does not scatter. Therefore, dustproof measures are not required, and workability can be improved and the cost of dustproof measures can be reduced.

Next, the paste-like or lump-shaped flying powder is formed into a predetermined shape that is easy to dry, for example, a pellet-like or plate-like shape having a predetermined thickness using a well-known food molding machine. Alternatively, the two rollers are compressed and stretched using a roll compressor that passes through the gap while rotating to form a sheet having a thickness of about 0.5 mm to 5 mm (molding step S204). The molding machine is also not particularly limited, and any device may be used as long as it can be molded into a desired shape such as a granule, a plate, or a pellet.

Next, the molded flying powder is dried to reduce the water content to about 15% or less (drying step S206). A well-known dryer can be used for this drying. Above all, it is particularly preferable to use a caterpillar type dryer or the like that can continuously dry by passing through a drying chamber.

Next, the dried flying powder is crushed and sized to a size of approximately 50 μm to 1200 μm (crushing step S208). For this crushing, a well-known crushing device such as a hammer mill, a pin mill, an impact mill, a ring roller mill, an air flow crusher (turbo mill), a roll mill, and a breaking machine can be used.

Here, since the general flying powder is white or light gray, the color is light as it is as a colored powder for konjac. Therefore, the flying powder crushed in the crushing step S208 is heat-treated at a high temperature of 180 ° C. to 220 ° C., and at the same time, it is sterilized and at the same time browned and discolored until it becomes black or dark brown (high temperature treatment step S210). The heating device used in this high temperature treatment step S210 is a well-known heating device and dryer such as a locking mixer, a heating stirrer, a ladyge mixer, an infrared annealing furnace, a conical ribbon mixing / drying device, a water dryer, and a paddle dryer. Can be used.

Next, the high-temperature treated flying powder is sieved according to the product to obtain colored powder for konjac having different maximum particle sizes such as 50 μm to 300 μm, 50 μm to 600 μm, 50 μm to 800 μm, 50 μm to 1000 μm, and 50 μm to 1200 μm (particle size). Adjustment step S212). As a result, the colored powder for konjac according to the present invention, which is composed of flying powder having a size of 50 μm to 1200 μm and discolored from black to dark brown, is completed.

As described above, the method for producing the colored powder for rape according to the present invention is to produce the colored powder for rape using flying powder which is a by-product of the production of 蒟 powder and is disposed of as food industry waste. Therefore, the raw material cost is extremely low as compared with seaweed (Ecklonia cava), and the colored powder for konjac can be provided at low cost. In addition, since the food industry waste is reused, it can contribute to the reduction of waste, the reduction of food loss, and the protection of the global environment.

Furthermore, unlike seaweed, the colored konjac flour according to the present invention is made from konjac potato, so the konjac produced using the colored konjac flour according to the present invention is listed in the raw material name column. It is possible to describe as konjac powder and konjac flying powder. As a result, the commercial value of the product can be improved.

It should be noted that each step of the method for producing the colored powder for konjac shown in this example is an example, and the conditions, method, equipment used, etc. can be changed as appropriate. In addition, other necessary steps can be inserted as appropriate, and the above steps can be performed a plurality of times. Further, the present invention can be modified and implemented without departing from the gist of the present invention.

S200 acquisition process
S202 water kneading process
S204 molding process
S206 drying process
S208 crushing process
S210 High temperature treatment process

Claims (1)

The acquisition process to acquire flying powder, which is a by-product of the production of konjac powder,
A water kneading step in which water is added to the flying powder and kneaded, and
A molding process that molds the water-kneaded flying powder into a predetermined shape,
A drying process that dries the molded flying powder,
A crushing step of crushing dried flying powder to a size of 50 μm to 1200 μm, and
A method for producing colored powder for konjac, which comprises a high-temperature treatment step of treating the crushed flying powder at a high temperature to change the color until it becomes black or dark brown.

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