JP2022049632A - Method for producing hydrogen-containing japanese sake - Google Patents

Abstract

To provide a method and an apparatus for effectively preventing the effect imparted to the taste and aroma peculiar to a Japanese sake before processing and safely dissolving hydrogen of sufficient concentration in the Japanese sake.SOLUTION: In a method for producing hydrogen-containing Japanese sake, a Japanese sake is filled in a pressure-resistant closed vessel 1 so as the volume of the head space 3 (VH) to be 5 to 40% for the volume of the pressure-resistant closed vessel (V0), a hydrogen gas is allowed to be present at a pressure of 0.1 MPa-G or more in the head space 3 and allowed to stand for 1 hour or more. During the time, it is preferable to adjust the temperature of the Japanese sake to 0 to 15°C and it is preferable that the Japanese sake is a ginjo sake.SELECTED DRAWING: Figure 1

Description

The present invention relates to a novel method for producing hydrogen-containing sake. Specifically, we provide a method for adding hydrogen to sake without changing the taste of sake.

Conventionally, attempts to prevent oxidation by blowing hydrogen into alcoholic beverages such as sake have been proposed.

Conventionally, as a method of dissolving hydrogen in alcoholic beverages, in order to dissolve more hydrogen, a method of blowing hydrogen into alcoholic beverages to dissolve it is common, and a method of making hydrogen into microbubbles and blowing it into sake (Patent Document 1). A method of pressurizing hydrogen and blowing it into sake, and a method of providing a circulation tank and blowing hydrogen while circulating sake have been proposed.

However, it was found by the experiments of the present inventors that these methods change their taste due to violent stirring and vibration by hydrogen gas blown into sake, and affect the taste and aroma peculiar to sake before treatment. ..

Therefore, there is a concern that the unique taste of the produced sake will change due to the dissolution of hydrogen, and that the change will change depending on the treatment conditions with hydrogen, making it difficult to produce stable sake.

In addition, when bubbling, it is necessary to purge the amount of hydrogen supplied to the processing container, and it is necessary to take safety measures for the discharged hydrogen gas.

Japanese Unexamined Patent Publication No. 2009-44988

Therefore, an object of the present invention is to provide a method and an apparatus for effectively preventing the influence on the taste and aroma peculiar to sake before treatment and safely dissolving hydrogen in a sufficient concentration in sake.

As a result of repeated researches to achieve the above object, the present inventors can significantly change the taste, especially the aroma of sake, by allowing hydrogen to exist in the gas phase portion in contact with the liquid surface of sake in a stationary state. It was found that a sufficient amount of hydrogen can be dissolved, and that the dissolved hydrogen is relatively stable and its existence can be confirmed for 6 months or more after bottling, and the present invention has been completed.

That is, according to the present invention, the closed container is filled with sake so that the volume of the head space ( _VH ) is 5 to 40% of the volume of the pressure-resistant closed container (V ₀ ). Provided is a method for producing hydrogen-containing sake, which comprises allowing hydrogen gas to exist in a headspace at a pressure of 0.1 MPa · G or more and allowing it to stand for 1 hour or more.

The above treatment is preferably performed at a low temperature, preferably at a temperature of 0 to 25 ° C.

In addition, the target sake has a remarkable effect in ginjo liquor containing a large amount of an active ingredient as ginjo aroma, for example, isoamyl acetate.

The present invention also provides a manufacturing apparatus suitable for carrying out the above method.

That is, according to the present invention, the hydrogen gas supply pipe opened at the upper part in the container includes a pressure-resistant airtight container provided with a liquid supply port for supplying sake, and the pressure-resistant airtight container is a headspace. An apparatus for producing hydrogen-containing sake is provided, which is provided with a pressure gauge for detecting pressure.

In the above device, the pressure-resistant closed container preferably has a height (L) ratio (L / D) in the range of 1 to 6 with respect to the diameter (D) of the inner surface of the container.

Further, it is preferable that the body of the pressure-resistant airtight container is provided with a cooling jacket so that the filled sake can be cooled to a predetermined temperature.

Further, it is preferable to provide a vacuum pump for depressurizing the head space in order to ensure that the hydrogen supplied in the head space is in contact with sake while standing still.

According to the production method of the present invention, since there is no bubbling or forced flow due to hydrogen gas, it is possible to effectively prevent the taste of sake, especially the change in aroma, due to stirring and vibration of sake, without changing the taste aimed at by the sake brewery. It becomes possible to produce hydrogen-containing sake. It was also confirmed that the dissolved hydrogen remained for a long period of time, specifically about 6 months, by measurement with a hydrogen densitometer.

Further, according to the method of the present invention, since the amount of hydrogen to be purged is extremely small, the amount of hydrogen used can be suppressed to an extremely small amount, which is economical and advantageous in terms of safety.

Schematic diagram showing one aspect of the hydrogen-containing sake production apparatus of the present invention. Schematic diagram showing another aspect of the hydrogen-containing sake producing apparatus of the present invention.

In the present invention, the raw material sake is not particularly limited and can be freely selected and used regardless of the degree of rice polishing, alcohol concentration and the like. Among them, sake for which the method of the present invention is particularly effective is ginjo sake containing a large amount of an active ingredient that easily volatilizes, for example, isoamyl acetate, and is preferably used in the present invention. Ginjo sake is generally classified according to the degree of rice polishing, and those with a rice polishing ratio of 60% or less are called Ginjo sake, and those with a rice polishing ratio of 50% or less are called Daiginjo sake among Ginjo sake. The present invention also follows this definition.

In the present invention, the shape, material, etc. of the pressure-resistant airtight container will be described later, but basically, a container that does not deteriorate due to contact with sake and has strength that can withstand the pressure of hydrogen present in the headspace is preferable. used.

It is preferable to fill the pressure-resistant airtight container with sake without stirring it as much as possible. For example, in the case of a large pressure-resistant airtight container, a filling method in which a supply port is provided at the bottom of the container to raise the water level is preferable. As a result, it is possible to prevent an impact due to dropping to the bottom of the pressure-resistant airtight container, and it is also possible to surely prevent a danger caused by entraining air when dropping.

The amount of sake filled in the pressure-resistant airtight container is not particularly limited as long as the head space for introducing hydrogen later can be secured, but the volume ( _VH ) of the head space is the above-mentioned pressure-resistant property. It is preferably performed so as to be 5 to 40%, preferably 10 to 30%, based on the volume (V ₀ ) of the closed container. That is, if the headspace is small, a large amount of pressure may be required to allow a sufficient amount of hydrogen to exist, and if the headspace is too large, the safety at the time of gas replacement is only reduced. There is a risk that production efficiency will decrease.

In the present invention, hydrogen is introduced into the headspace after filling with sake, but prior to the introduction of hydrogen, the air in the headspace is replaced with an inert gas such as nitrogen, or the gas in the headspace, for example, air is discharged. It is preferable to keep the vacuum in place from the viewpoint of safety.

The embodiment in which the head space is evacuated is preferable because hydrogen gas can be surely present at the interface with sake in the head space as compared with the replacement with nitrogen gas. That is, when the gas existing in the headspace is replaced by supplying hydrogen gas, if the replacement is insufficient and a small amount of nitrogen gas remains after the replacement, depending on the method of supplying the hydrogen gas, the hydrogen gas may be caused by the difference in the specific gravity of the gas. There is a concern that the nitrogen gas will form a layer and the nitrogen gas will stay on the liquid surface and the contact between sake and hydrogen will be insufficient. The hydrogen gas produced can be reliably present at the interface with sake.

The vacuum does not mean a complete vacuum, and it is sufficient to reduce the pressure to −0.1 MPa · G or less, preferably −0.2 MPa · G or less.

In the present invention, the introduction of hydrogen into the headspace is such that hydrogen is present in the headspace in the form of a gas at a pressure of 0.1 MPa · G or more, preferably 0.2 MPa · G or more, preferably less than 1 MPa · G. It is necessary to do. By setting the pressure due to hydrogen to the above pressure or higher, sufficient hydrogen can be contained in sake in a stationary state. If the pressure is too high, a high pressure resistant structure is required and the manufacturing equipment becomes expensive. Further, when the head space is small, the pressure may be significantly reduced by dissolving hydrogen in sake, but in that case, it is sufficient to further introduce hydrogen to maintain the pressure.

As mentioned above, by introducing hydrogen directly into the headspace without bubbling sake, it is possible to bring hydrogen gas and sake into contact with each other and dissolve hydrogen in sake without changing the taste of sake. It will be possible.

In the present invention, it is necessary to allow the hydrogen gas to stand for 1 hour or more, preferably 2 to 24 hours, particularly 5 to 15 hours after the introduction of the hydrogen gas. By such standing, hydrogen is dissolved in sake in a sufficient amount.

It is preferable to keep the temperature of the sake in the pressure-resistant airtight container at a low temperature in the above-mentioned standing, in order to increase the amount of hydrogen dissolved and prevent the deterioration of the sake, preferably 0 to 25 ° C. It is preferable to allow it to stand at a temperature of 0 to 15 ° C.

The present invention also provides a manufacturing apparatus capable of suitably carrying out the manufacturing method. That is, according to the present invention, the gas supply pipe opened at the upper part in the container includes a pressure-resistant airtight container provided with a liquid supply port for supplying sake, and the pressure-resistant airtight container is the pressure of the head space. Provided is an apparatus for producing hydrogen-containing Japanese liquor, which comprises a pressure gauge for detecting a pressure, and is configured such that the gas supply pipe can be connected to a hydrogen cylinder.

FIGS. 1 and 2 show a schematic diagram of a hydrogen-containing sake producing apparatus of the present invention suitable for carrying out the producing method of the present invention.

First, to explain according to FIG. 1, the hydrogen-containing sake producing apparatus of the present invention is separately provided with a gas supply pipe 4 opened at the upper part of the container and, if necessary, a gas discharge pipe 6, and is a liquid for supplying sake. A pressure-resistant airtight container 1 including a supply pipe 5 and, if necessary, a liquid take-out pipe 11 opened at the lower part of the container is included, and the pressure-resistant airtight container 1 includes a liquid level meter (not shown) and a head space. The gas supply pipe 4 is provided with a pressure gauge 12 for detecting the pressure of the above gas, and is configured to be connected to a hydrogen cylinder 7 and a nitrogen (inert gas) cylinder 13 so as to be able to switch between hydrogen gas and nitrogen gas. ..

In the above device, the pressure-resistant airtight container 1 is not particularly limited as long as it has a material and a structure that can withstand the pressure applied to the head space. As the material, a metal such as titanium or SUS is generally used, but titanium has little influence on sake, so that it is preferably used. Further, as the pressure-resistant structure, a known structure such as a mode in which a reinforcing material is provided on the outer periphery of the container and a mode in which the thickness of the wall of the container is adjusted is adopted without particular limitation.

In the present invention, the shape of the pressure-resistant airtight container 1 is preferably circular or elliptical in cross section. Further, the shape in which the ratio (L / D) of the height (L) to the diameter (D) of the inner surface of the container is in the range of 1 to 6 makes it easy to secure the head space and control when the liquid is taken out. Especially preferable. The capacity of the pressure-resistant airtight container is not particularly limited and may be appropriately determined depending on the scale of the manufacturing equipment, but it is 3 m ³ or less from the viewpoint of easy securing of an installation place in the sake manufacturing factory. It is preferable, and it is particularly preferable to use 5 liters to 2 m ³ so that the sake can be moved to an existing storage tank of sake in the sake manufacturing factory to produce hydrogen-containing sake. It should be noted that a plurality of pressure-resistant airtight containers 1 can be provided side by side.

In the manufacturing apparatus, a known pressure gauge (not shown) and a pressure gauge 12 for detecting the pressure in the head space, which can withstand the use under the above conditions, are used without particular limitation.

Further, the pipes from the hydrogen cylinder 7 and the nitrogen (inert gas) cylinder 13 are provided with a hydrogen gas regulator 9 and a nitrogen gas (inert gas) regulator 14, respectively, as necessary, and the pressure is adjusted to withstand the pressure. It is configured to be supplied to the sex-sealed container 1. Further, the switching between the hydrogen gas and the nitrogen gas supplied to the pressure-resistant airtight container 1 is configured to be performed by manually or automatically opening and closing the valve provided in the connecting pipe.

In the manufacturing apparatus, the liquid supply pipe 5 is connected to a sake storage tank (not shown) and is open to any of the pressure-resistant airtight containers 1 as long as the sake is filled in the pressure-resistant airtight container 1. However, it is preferable that the sake is filled from the opening at the bottom of the pressure-resistant airtight container 1 so as to prevent the impact of dropping the sake when the sake is filled in the pressure-resistant airtight container 1.

Further, by opening the lower part of the liquid take-out pipe 11 pressure-resistant airtight container, the produced hydrogen-containing sake can be efficiently taken out by utilizing the pressure in the container.

In the manufacturing apparatus, it is preferable that the body of the pressure-resistant airtight container 1 is provided with a cooling jacket 8 so that the filled sake can be cooled to a predetermined temperature. As the cooling method, a known method is adopted without particular limitation.

The production of hydrogen-containing sake using the production apparatus of the present invention can be appropriately carried out within a range that satisfies the above-mentioned production conditions. The following aspects are typical examples.

Open the valve of the liquid supply pipe 5 opened at the bottom of the container, supply sake from the sake storage tank to the pressure-resistant airtight container 1, and control the liquid level with a liquid level meter so that the head space becomes a predetermined value. Supply sake to. Next, the head is supplied from the gas supply pipe 4 opened at the upper part of the pressure-resistant airtight container 1 to the head space 3 from the nitrogen cylinder 13 via the nitrogen gas regulator 14, and gas purged from the gas discharge pipe 6. After replacing the space 3 with gas, the connection to the gas supply pipe 4 is switched, hydrogen gas is supplied from the hydrogen cylinder 7 via the hydrogen gas regulator 9, and the head space 3 is hydrogen by purging the gas from the gas discharge pipe 6. After replacement with gas, hydrogen gas is supplied while checking the pressure of the head space 3 with the pressure gauge 12, and the pressure is set to a predetermined value. After that, the sake is allowed to stand for a predetermined time, and hydrogen-containing sake is taken out from the liquid take-out pipe 11 having an opening at the lower part of the container.

In the above-mentioned production, the substitution with nitrogen gas in the pressure-resistant airtight container 1 may be performed before the filling of sake, and the substitution with hydrogen gas may be performed before filling with sake. Further, when the substitution with hydrogen gas is performed before the filling of sake, it is possible to set the pressure of the head space to a predetermined pressure by increasing the filling amount due to the subsequent supply of sake. When it is necessary to adjust the pressure of the head space after filling, the pressure can be adjusted by supplying hydrogen gas from the gas supply pipe 4 and reducing the pressure by the gas discharge pipe 6.

Further, after taking out the obtained hydrogen-containing sake in the above-mentioned production, the sake is supplied (press-fitted) to a predetermined level from the liquid supply pipe 5 without purging the hydrogen gas existing in the pressure-resistant airtight container 1. As a result, the hydrogen gas can be reused. In particular, by setting the capacity of the head space and the pressure of hydrogen so that the entire amount of hydrogen-containing sake obtained can be discharged by its own pressure, it is possible to eliminate the amount of hydrogen purge between production lots. The production apparatus shown in FIG. 1, which enables economically and safely to produce hydrogen-containing sake, is an embodiment in which a method of replacing headspace with nitrogen gas and then hydrogen replacement is carried out. Although it is possible to produce the desired hydrogen-containing sake by this, in the above-mentioned production apparatus, a vacuum pump is attached instead of the above-mentioned nitrogen gas supply equipment, and the head space of the pressure-resistant airtight container is evacuated. Later, an embodiment configured to supply hydrogen can also be suitably adopted.

FIG. 2 is a schematic view showing another typical aspect of the manufacturing apparatus of the present invention. The manufacturing apparatus of FIG. 2 has a pressure-resistant airtight container 1 having a gas supply / discharge pipe A for supplying and discharging gas and a liquid supply / discharging port B for supplying and discharging sake, which is opened at the upper part of the container. The pressure-resistant airtight container 1 includes a pressure gauge 12 for detecting the pressure in the head space 3, and has a structure in which the gas supply / discharge pipe A can be connected to a hydrogen cylinder. The gas supply / discharge pipe A is fixed to an attachment that can be detachably attached to the opening of the pressure-resistant airtight container. Further, the gas supply / exhaust pipe A extends to the outside of the container and is configured to be connected to the vacuum pump 16 and the hydrogen cylinder 13 via an on-off valve. Further, a regulator 14 for adjusting the pressure from the hydrogen cylinder 13 is provided as needed. Further, the pressure gauge 12 may be attached to the attachment, but as shown in the figure, it can also be attached to the extending portion of the gas supply / exhaust pipe A.

In the above manufacturing apparatus, the supply and discharge of sake to the pressure-resistant airtight container 1 can be performed from the liquid supply / discharge port B by removing the attachment 17. Thus, after supplying a predetermined amount of sake to the pressure-resistant airtight container 1, the attachment 17 is attached, then the valves b and c are closed, the valves a and d are opened, and the vacuum pump 16 is operated to operate the pressure-resistant airtight container 1. The head space 3 of is evacuated. After that, the valve d is closed, the valve b is opened, and after confirming with a pressure gauge that hydrogen gas has been supplied from the hydrogen cylinder 13 so that the head space 3 has a predetermined pressure, the valves a and b are closed. The static operation after supplying the hydrogen gas may be performed in this state, but the pressure-resistant airtight container 1 with the attachment 17 attached is separated from the line connected to the hydrogen cylinder 13 and the line connected to the vacuum pump 16. , It is also possible to handle. By separating in this way, it becomes possible to produce hydrogen-containing sake by using a plurality of pressure-resistant airtight containers 1 for one set of vacuum pump and hydrogen cylinder. It is also possible to replace the cooling jacket by moving the separated pressure-resistant airtight container 1 to a refrigerating facility and allowing it to stand still.

The manufacturing apparatus shown in FIG. 2 is suitable for using a small capacity, specifically, a pressure-resistant airtight container having a pressure resistance of 30 liters or less.

Example 1
The manufacturing method of the present invention was carried out using the manufacturing apparatus shown in FIG. First, using a pressure-resistant airtight container 1 made of titanium having a diameter D of 50 cm and a diameter of 3 (L / D), the valve of the liquid supply pipe 5 is opened, and sake (rice polishing rate is 50%) from the sake storage tank. Ginjo sake) was filled from the lower opening of the pressure-resistant airtight container 1. The liquid level rose quietly with the supply of sake, and the supply of sake was stopped at the position where the head space became 25% by the liquid level meter.

Nitrogen gas was supplied from the nitrogen cylinder 13 to the head space 3 from the gas supply pipe 4 opened at the upper part of the pressure-resistant airtight container 1 via the nitrogen gas regulator 14, and the head space 3 was replaced with gas. Next, after switching the connection to the gas supply pipe 4 and supplying hydrogen gas from the hydrogen cylinder 7 via the hydrogen gas regulator 9 to replace the head space 3 with gas, the head space is measured by the pressure gauge 12. The pressure of 3 was adjusted to 0.3 MPa · G.

The body of the pressure-resistant airtight container 1 was cooled with a cooling jacket and allowed to stand for 12 hours while being maintained at 5 ° C.

After that, sake was taken out from the liquid take-out pipe 11 opened at the bottom of the pressure-resistant airtight container 1, and the hydrogen concentration was measured with a commercially available simple hydrogen concentration system. As a result, it was 0.33 ppm. Before and after dissolving hydrogen, the aroma was analyzed by a gas chromatograph and the taste was analyzed by a taste sensor. As a result, the rate of change in the aroma was 3%, and the taste was described in the main inspection items. No big difference was seen.

Further, when the sake was taken out, almost the entire amount could be discharged due to the internal pressure in the pressure-resistant airtight container 1. After that, while leaving hydrogen gas in the pressure-resistant airtight container 1, sake is supplied from the liquid supply pipe 5 and hydrogen gas is supplied (consumed) from the gas supply pipe 4 so that the same conditions as described above are satisfied. The pressure of the headspace was adjusted (about the amount of replenishment), and the mixture was allowed to stand under the same conditions to produce hydrogen-containing sake.

Further, as a result of measuring the hydrogen concentration of the hydrogen-containing sake obtained in the above example after refrigerating for 6 months, 0.24 ppm of hydrogen was confirmed.

The hydrogen concentration of the sake obtained by bubbling hydrogen for 5 hours in a container different from the container in which the same sake was used in the present invention was almost the same as that of the sake obtained in the present invention. In the above analysis, the fragrance component was found to be significantly lower than the above result, although there was a difference depending on the bubbling method.

Example 2
Hydrogen-containing sake was produced using the production apparatus shown in FIG.

After removing the attachment 17 and supplying the same Japanese sake as in Example 1 to a pressure-resistant airtight container 1 made of titanium having a capacity of 10 liters so that the head space 3 becomes 30%, the attachment 17 is attached, and then the valve b. , C is closed, valves a and d are opened, the vacuum pump 16 is operated, the head space 3 of the pressure-resistant airtight container 1 is evacuated to −0.1 MPa · G, and then the valve d is closed. With the valve b opened, hydrogen gas was supplied from the hydrogen cylinder 13 while checking with a pressure gauge so that the head space 3 was 0.2 MPa · G. Next, the valves a and b are closed, the pressure-resistant airtight container 1 with the attachment 17 attached is separated from the line connected to the hydrogen cylinder 13 and the line connected to the vacuum pump 16, and placed in a refrigerator adjusted to 5 ° C. It was allowed to stand for 5 hours.

After that, the attachment of the pressure-resistant airtight container 1 was removed, sake was taken out from the liquid supply / discharge port B, and the hydrogen concentration was measured with a commercially available simple hydrogen concentration system. As a result, the concentration was 0.28 ppm. Further, before and after dissolving the hydrogen, the scent was analyzed by a gas chromatograph and the taste was analyzed by a taste sensor. As in Example 1, the rate of change in the scent was 4%, and the taste was changed. There was no significant difference in the main inspection items.

1 Pressure-resistant airtight container 2 Japanese sake 3 Headspace 4 Gas supply pipe 5 Liquid supply pipe 6 Gas discharge pipe 7 Hydrogen cylinder 8 Cooling jacket 9 Hydrogen gas regulator 10 Hydrogen gas supply pipe 11 Liquid take-out pipe 12 Pressure gauge 13 Nitrogen cylinder 14 Nitrogen Gas regulator 15 Nitrogen gas pipe 16 Vacuum pump 17 Attachment

Claims (7)

The pressure-resistant airtight container is filled with sake so that the volume of the head space (V _H ) is 5 to 40% of the volume of the pressure-resistant air-tight container (V ₀ ), and the head space is 0.1 MPa. -A method for producing hydrogen-containing sake, which comprises allowing hydrogen gas to exist at a pressure of G or higher and allowing it to stand for 1 hour or longer. The method for producing hydrogen-containing sake according to claim 1, wherein the temperature of the sake is adjusted to 0 to 25 ° C. The method for producing hydrogen-containing sake according to claim 1 or 2, wherein the sake is ginjo sake. A gas supply pipe opened at the top of the container includes a pressure-resistant airtight container equipped with a liquid supply port for supplying sake, and the pressure-resistant airtight container is equipped with a pressure gauge for detecting the pressure in the headspace. A device for producing hydrogen-containing sake, wherein the gas supply pipe is configured to be connectable to a hydrogen cylinder. The hydrogen-containing sake producing apparatus according to claim 4, wherein the pressure-resistant airtight container has a ratio (L / D) of a height (L) to a diameter (D) of the inner surface of the container in the range of 1 to 6. The device for producing hydrogen-containing sake according to claim 4 or 5, wherein the body of the pressure-resistant airtight container is provided with a cooling jacket. The hydrogen-containing sake producing apparatus according to any one of claims 4 to 6, further comprising a vacuum pump for reducing the pressure in the head space.

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