KR101139873B1 - The manufacturing method of soju for dissolving the much pure oxygen - Google Patents

Abstract

The present invention relates to a method for producing soju that dissolves a large amount of pure oxygen.

The method for preparing soju for dissolving a large amount of pure oxygen of the present invention comprises the steps of diluting the alcohol, deodorizing and purifying the diluent, adding a food additive to the tablet, and mixing the same, and then filtering the soju. A step of aeration of the first pure oxygen in the sojunaju, Injecting the second pure oxygen into the sojunaju dissolved in the first pure oxygen through a pressure pump to circulate together to dissolve the second pure oxygen, Dissolving the third pure oxygen in the form of an inorganic cloth in the sojunaju in which the second pure oxygen is dissolved, dissolving the fourth pure oxygen by flowing the sojunaju in which the third pure oxygen is dissolved along the permeable contact membrane; After lowering the temperature of the sojunaju in which the fourth pure oxygen is dissolved, aeration and dissolving the fifth pure oxygen in the sojunaju in which the temperature is lowered, and bottling the sojunaju in which the fifth pure oxygen is dissolved, air furnace And injecting a sixth pure oxygen into the zlot bottle to dissolve in the sojunaju in which the fifth pure oxygen bottled is dissolved and then seal.

According to the present invention, there is provided a method for producing soju, in which pure oxygen is dissolved in a high concentration in a short time, and a high dissolved oxygen amount is maintained even with time.

High concentration, pure oxygen, shochu, bubble, inorganic cannon

Description

THE MANUFACTURING METHOD OF SOJU FOR DISSOLVING THE MUCH PURE OXYGEN}

The present invention relates to a method for producing soju, in which a large amount of pure oxygen is dissolved, and more particularly, to a method for preparing soju, which dissolves pure oxygen in a high concentration in a short time and maintains a high dissolved oxygen amount even after a long time.

As various changes have been made to the current consumption culture of alcohol, the liquor favored by consumers is to lower the alcohol content, give a soft taste to eat, and at the same time show a quick hangover.

That is, depending on the constitution of the individual, but most of the alcohol after 5 minutes intake of blood alcohol concentration appears, 30-60 minutes after ingestion peaks.

When ingested, these alcohols are absorbed directly into the stomach without digestion. Most of them are oxidized in the liver and decomposed into water (H ₂ O) and carbon dioxide (CO ₂ ) through the steps of acetaldehyde and acetate. .

In this process, the drinker requires more oxygen, and thus the degree of decomposition of alcohol is changed according to the degree of oxygen supply.

Therefore, drinking alcohol naturally decreases the amount of oxygen in the body, which leads to hypoxia, and requires more than three molecules of oxygen per molecule of alcohol, which is higher than usual, and naturally decreases the amount of oxygen in the body, thus causing headaches. And a hangover such as vomiting.

Therefore, studies on oxygen-containing liquor have been conducted as follows.

Korean Patent Laid-Open Publication No. 2003-0038173 (Oxygen Shochu) discloses a functional shochu which increases the amount of dissolved oxygen by dissolving oxygen generated by the PSA method at a high pressure.

However, simply dissolving oxygen generated using PSA in soju as in the above invention has a large amount of dissolved oxygen being released and lost, so that the amount of dissolved oxygen is extremely small and its effect is inefficient and inefficient.

In addition, Korean Patent Publication No. 10-0664599 (Method for preparing a dilute shochu containing pure oxygen) relates to a dilute shochu containing pure oxygen which dissolves oxygen as much as possible and greatly reduces the hangover after drinking. It is open.

This is an applicant filed by the applicant of the present invention, but it takes a long time to produce shochu, there is a problem economically.

Therefore, even when the oxygen is dissolved in a high concentration in a short time, a high concentration of dissolved oxygen is maintained even over time, so the study of soju is much faster to resolve hangover.

In order to solve the above problems, it is an object of the present invention to provide a method for preparing soju so that pure oxygen can be dissolved at a high concentration in a short time and the dissolved oxygen content at a high concentration is maintained even after time passes.

In addition, the purpose is to provide a shochu that is excellent in economic efficiency, and gives a mild and soft taste.

In the method of preparing soju for dissolving a large amount of pure oxygen of the present invention, after diluting a spirit having a alcohol concentration of 95% to a alcohol concentration of 40 to 60%, it is aged at room temperature for 7 to 10 days, and then aged. In addition, the second step of diluting again to prepare a diluent having an alcohol concentration of 20 to 36%, the second step of deodorizing the dilution with activated carbon, and then purified by far-infrared rays and silver particles to prepare a purified solution, and After adding the food additives to the purified liquid and mixing, the third step of filtering the sojunaju and the fourth step of aeration and dissolving the first pure oxygen through the first air stone in the soju, and the first After storing the soju-naju in which oxygen is dissolved in the container, the tip is circulated by a pressure pump installed in the middle of the circulation pipe along a circulation pipe installed across the upper and lower sides of the container so that the tip is located inside the container. , And others The nozzle which injects and circulates the second pure oxygen supplied from the pressurized pump into the circulation pipe, forms an additional tapered nozzle hole in the interior of the tip and contacts the internal and external communication holes in front of the additional nozzle hole. A fifth step of dissolving the second pure oxygen by injecting the sojunaju in which the first pure oxygen into which the second pure water is injected is dissolved, and the outside of the filter having nano-sized pores surrounding the third pure oxygen supply line. Accordingly, the sixth step of dissolving the third pure oxygen in the form of inorganic cloth by flowing the soju naju in which the second pure oxygen is dissolved, and the soju naju in which the third pure oxygen is dissolved are disposed in the fourth pure oxygen supply line. The seventh step of dissolving the fourth pure oxygen by flowing along the tubular permeable contact membrane and the soju naju containing the fourth pure oxygen are flowed along the cooling tube to lower the temperature, and then the temperature of the soju The eighth step of aeration and dissolving the fifth pure oxygen through the third air stone, the ninth step of feeding in the sojunaju in which the fifth pure oxygen is dissolved, and the sixth pure oxygen is injected into the bottle with the air nozzle. And a fifth step of dissolving the bottled fifth pure oxygen in the dissolved soju or sake, and then sealing.

In addition, in the fourth step, the first pure oxygen is aerated by dissolving at 2 to 8 l / min for 3 to 20 minutes.

In addition, in the fifth step, the amount of dissolved oxygen of the sojunaju in which the generated second pure oxygen is dissolved is 30 to 35 ppm.

In addition, the dissolved oxygen amount of the sojunaju in which the third pure oxygen produced in the sixth step is dissolved is characterized in that 35 ~ 40 ppm.

In addition, the soju prepared by the above method is characterized in that the final alcohol concentration is 17 to 25%, 40 to 50 ppm dissolved oxygen is maintained for 30 to 40 days.

According to the above solution, there is provided a method for producing shochu, in which pure oxygen can be dissolved in a high concentration in a short time while maintaining a high dissolved oxygen amount even over time.

In addition, it is excellent in economy, and is served with a mild and soft shochu.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

With reference to the drawings will be described a method for producing soju dissolving a large amount of pure oxygen of the present invention.

1 is a manufacturing method of soju to dissolve a large amount of pure oxygen of the present invention, Figure 3 is a view showing a device for dissolving the second pure oxygen in the sojunaju in which the first pure oxygen is dissolved in the present invention, Figure 4, FIG. 5 is a view showing an apparatus for dissolving a second pure oxygen in the form of an inorganic bubble in a sojunaju in which the first pure oxygen is dissolved in the present invention, Figure 6 is a fourth net in a sojunaju in which the third pure oxygen is dissolved FIG. 7 is a view showing a device for dissolving oxygen, FIG. 7 is a view showing a device for dissolving fifth pure oxygen in a sojunaju in which the fourth pure oxygen is dissolved in the present invention, and FIG. It is a figure which shows the apparatus which melt | dissolves a 6th pure oxygen in soju and liquor.

As shown in the figure, the method for preparing soju of the present invention is a method of dissolving pure oxygen six times in soju through different methods and maintaining the dissolved oxygen for a long time. .

First, alcohol in which the alcohol concentration is 95% is prepared as a diluent having an alcohol concentration of 20 to 36% in the first step.

In other words, the alcohol concentration of 95% alcohol is first diluted to 40 to 60% alcohol concentration, and then aged for 7 to 10 days at room temperature, and then diluted twice, which is the preferred alcohol concentration of consumers A 19-36% dilution is prepared to obtain a drinkable alcohol concentration.

In the second step, the diluent is deodorized with activated charcoal, and then refined with far-infrared rays and silver particles to prepare a refining solution. Nine packed towers filled with activated carbon are passed through with SV (Space Velocity; input flow / reactor volume) 3 to 5 and deodorized, and then passed through SV 25 through a packed tower filled with far-infrared carrier and silver particles. Purify by treating.

At this time, the far-infrared carrier is used by mixing with alumina, silica, clay, feldspar, iron oxide, manganese dioxide, copper oxide, cobalt oxide, magnesia and the like and calcined at 1,300 ° C for 10 hours, and the silver particles have a particle size of 1-5 mm. It is recommended to use silver with a purity of 99.99%.

 In the third step, after adding the food additives to the tablet liquid and mixing, it is filtered to produce sojunaju, wherein the food additive is prepared by adding the syrup in the tablet liquid, and then mixed.

Here, the food additive is preferably mixed by adding 0.01 to 2% by volume of the total volume of the purified liquid, wherein the food additive is sugar, citric acid, sucralose, sorbitol, stevioside, erythritol, xylitol, teas (processed grain tea in single leach) It is recommended to mix and use 6 or more selected each of 0.001 ~ 0.5% (W / V).

In the fourth step, the first pure oxygen is aerated and dissolved in the soju naju 10.

At this time, it is preferable to use the first bubble dissolving apparatus equipped with the first air stone as the dissolving apparatus used, which generates 99.80 ~ 99.99 pure oxygen in the form of bubbles, aerated in the sojunaju It is a method of dissolving 1st pure oxygen.

Here, the first bubble dissolving device 100 is configured to aeration the pure oxygen generated by the first oxygen generating device 110 in the soju or alcohol 10 stored in the first storage tank 140, and the first oxygen generating device. 99.80 to 99.99% of the pure oxygen generated in the 110 is discharged through the first pure oxygen supply line 120, wherein the pressure generated by the first pressure gauge 121 provided on one side of the first pure oxygen supply line While adjusting the first pure oxygen in the form of bubbles 150 through the first air stone 130 connected to the first pure oxygen supply line is aerated in the soju naju 10.

In this case, when oxygen is dissolved using a general nozzle, it takes a long time to saturate, and the amount of dissolved oxygen also drops quickly. In the present invention, in order to obtain an effect of increasing the amount of dissolved oxygen while shortening the time required to saturate. The first pure oxygen bubble 150 is aerated at 2 to 8 l / min for 3 to 20 minutes using the first air stone 130 adjusted to have a bubble diameter of 0.1 to 1 μm.

In the fifth step, the second pure oxygen is dissolved in the form of an inorganic bubble in the soju naju 160 in which the first pure oxygen is dissolved.

At this time, as shown in Figure 3, the first inorganic bubble oxygen soluble device used is a circulation installed across the upper and lower sides outside the container 210 for storing the sojunaju 160 in which the first pure oxygen is dissolved Pipe 250 is provided, the front end of the circulation pipe is installed in the interior of the vessel 210, the pressurized pump 251 is installed in the middle of the circulation pipe, the first pure oxygen dissolved soju Circulates Naju 160.

At this time, the second pure oxygen 231 supplied from the second oxygen generator 230 is injected into the circulation pipe through the pressure pump 251 and circulated.

In addition, the nozzle 253 is provided at the front end of the circulation pipe, through which the second pure oxygen is dissolved by injecting sojunaju in which the first pure oxygen into which the second pure water is injected is dissolved.

In particular, an additional nozzle hole of a tapered shape is formed inside the nozzles 253, and a predetermined vortex is generated while hitting the tapered ends 253a constituting the additional nozzle hole to dissolve the second pure oxygen. do.

In addition, outside of the nozzle 253, contact holes 253b contacting the inside and outside of the nozzle are formed in front of the additional nozzle hole so that the first pure oxygen injected with the second pure oxygen injected through the additional nozzle hole is dissolved. The flow rate of sojunaju is increased so that the sojunaju, in which the first pure oxygen infused with the second pure oxygen distributed outside the nozzle 253 is sucked, is sucked through the contact hole 253b, causing a siphon phenomenon. In this way, the dissolution of the second pure oxygen is promoted to increase the dissolved oxygen amount, thereby preparing the soju naju 260 in which the second pure oxygen dissolved in the pure oxygen is dissolved at 30 to 35 ppm.

Next, in the sixth step, the third pure oxygen is dissolved in the form of an inorganic bubble in the soju naju 260 in which the second pure oxygen is dissolved.

In particular, along the outside of the filter 310 having nano-sized pores surrounding the third pure oxygen supply line to dissolve the third pure oxygen at a high concentration (35 to 40 ppm), the soju in which the second pure oxygen is dissolved It is preferable to dissolve the third pure oxygen by flowing the Naju 260.

At this time, as shown in Figures 4 and 5, the second inorganic bubble oxygen dissolving device 300 used is provided with a third pure oxygen supply line 320 for supplying pure oxygen, each of which is wrapped around them PE membrane membrane filters 310 formed of nano-sized pores are provided, and the first transfer pipe 330 to which sojunaju in which the second pure oxygen is dissolved is transported in a form covering the entire membrane filters 310. ) Is provided, the second pure oxygen injected through the third pure oxygen supply line 320 passes through the membrane filter 310, the second pure oxygen injected into the first transfer pipe 330 and flows It is to be dissolved in the form of inorganic cloth in the dissolved soju naju 260.

In addition, the first cooler 340 is provided along the upper and lower outer sides of the first transfer pipe 330 to lower the temperature of the soju or sake in which the second pure oxygen is dissolved, so that the third pure oxygen is dissolved better. Both ends of the third pure oxygen supply line 320 are provided with a check valve 351 for preventing backflow of alcohol when the oxygen supply is stopped and a solenoid valve 361 which is a control device for setting the supply and stop of oxygen supply. It is.

In addition, one side of the first transfer pipe 330 is provided with a second pressure gauge 371 in order to safely protect the third pure oxygen supply line 320 from the pressure due to oxygen dissolved, the other side is pure oxygen at a constant concentration In order to ensure that dissolved oxygen is continuously dissolved, a dissolved oxygen meter (DO meter, 281) is provided, so that the pure oxygen is dissolved in third concentration of dissolved oxygen at high concentration (35-40 ppm). 390 will be manufactured.

In the next seventh step, the fourth pure oxygen is dissolved in the sojunaju 390 in which the third pure oxygen is dissolved.

In this case, as shown in FIG. 6, the second inorganic dissolving device 400 is used, which is provided with a tubular permeable contact membrane 410 inside the fourth pure oxygen supply line 420. The second transfer pipe is configured to flow the soju or soju 360 in which the third pure oxygen is dissolved.

Accordingly, the fourth pure oxygen discharged through the fourth pure oxygen supply line 420 passes through the permeable contact membrane 410 for converting the fourth pure oxygen particles discharged from the fourth pure oxygen supply line into a molecular state. By dispersing and dissolving the third pure oxygen flowing in the second transfer pipe into the dissolved soju naju 360, the fourth pure oxygen is dissolved soju naju 430 which can maintain the dissolved pure oxygen for a long time. .

Next, in the eighth step, the sojunaju 430 in which the fourth pure oxygen is dissolved is flowed along the cooling tube 510 to lower the temperature, and then, in the sojunaju 430 in which the fourth pure oxygen is dissolved, the temperature is lowered. 5 Aeration of pure oxygen to dissolve.

That is, as shown in FIG. 7, since the temperature of the soju or sake in which the fourth pure oxygen is dissolved is 25 ° C. or higher, when the fifth pure oxygen is dissolved in this state, there is a problem that the amount of dissolved oxygen decreases. The fourth air stone 530 connected to the cooling tube 510 after lowering the temperature to 15 to 20 ° C. by distilling sojunaju in which the fourth pure oxygen is dissolved along the cooling tube 510 to which the refrigerant is attached. The fifth pure oxygen is adjusted to have a bubble diameter of 0.1 to 1 μm using a), and then sprayed onto the sojunaju 430 in which the fourth pure oxygen is dissolved at 2 to 8 L / min is dissolved.

In this case, a third bubble dissolving device 500 equipped with a third air stone 530 is used as the device, which discharges the fifth pure oxygen through the fifth pure oxygen supply line 520. The third air stone 530 connected to the fifth pure oxygen supply line is inside the third transfer pipe 540 while adjusting the pressure generated by the fourth pressure gauge 521 provided at one side of the fifth pure oxygen supply line 520. Soju Naju 560 in which the fifth pure oxygen is formed in the form of bubbles 550 through the third air stone 530 and aerated in the soju naju where the fourth pure oxygen is dissolved, thereby dissolving the fifth pure oxygen 560. ) Will be manufactured.

In this case, the fourth to eighth steps may be repeated two to three times before dispensing to further dissolve the pure oxygen.

Next, in the ninth step, the soju or liquor in which the fifth pure oxygen is dissolved is bottled.

Next, in the tenth step, after injecting and dissolving the sixth pure oxygen into the inlet of the bottle in which the sojunaju 560 in which the fifth pure oxygen is dissolved is injected, the large amount of pure oxygen of the present invention is sealed by sealing the bottle cap. The dissolved shochu is prepared.

In this case, the fourth bubble dissolving device 600, which is a dissolving device used as shown in FIG. 8, supplies a sixth pure oxygen generated from the oxygen generating device for the purpose of preventing oxygen from being partially lost before the bottle cap is blocked. The sixth pure oxygen discharged through the air nozzle 620 is configured to dissolve the bottled fifth pure oxygen in the soju or liquor in which the bottled fifth pure oxygen is dissolved.

That is, through the air curtain 610 for blocking contact with the external air in a sieve in which the sojunaju is dissolved in the fifth pure oxygen is discharged through the air nozzle 620 provided in the air curtain 610 After the sixth pure oxygen bubble 630 is directly injected into the bottle, and dissolved, the bottle cap is closed to prepare the soju of the present invention.

The soju of the present invention prepared by the above method has a final alcohol concentration of 17 to 25%, and a high concentration of dissolved oxygen is maintained for a long time even with time, and it is excellent in economic efficiency, and tastes smooth and soft.

To confirm this, as a result of confirming the maintenance period of the pure oxygen dissolved in the soju of the present invention prepared through the manufacturing method as shown in Table 1 and Figure 9 below.

The following control is a soju prepared without undergoing the seventh step of dissolving pure oxygen through the tubular permeable contact membrane 410 of the present invention.

Elapsed date Control Invention DO (ppm) % Lost DO (ppm) % Lost One 32 0 45 0 5 27 15.63 44 2.22 10 23 28.13 44 2.22 15 22 31.25 43 4.44 20 21 34.38 42 6.67 25 21 34.38 42 6.67 30 20 37.50 41 8.89 35 20 37.50 40 11.11 40 20 37.50 40 11.11

As can be seen from the results of Table 1 and FIG. 9, the soju prepared in the control contains 32 ppm of dissolved oxygen, and only 40 ppm is lost and only 37 ppm is lost after 40 days. The soju prepared at contains 45 ppm of dissolved oxygen, and 40 ppm is maintained even after 40 days, and thus, it is possible to prepare a soju that has maintained dissolved oxygen for a long time.

The present invention described so far is apparent that various modifications and changes can be made within the scope of the technical spirit described in the claims of the present invention, the detailed description of the present invention and the accompanying drawings limit the technical spirit of the present invention. It should not be construed as merely illustrative but rather as illustrative.

1 is a manufacturing method of shochu solubilizing a large amount of pure oxygen of the present invention.

Figure 2 is a view showing a device for aeration and dissolution of the first pure oxygen in shochu Naju in the present invention.

Figure 3 is a view showing a device for dissolving the second pure oxygen in the sojunaju in which the first pure oxygen is dissolved in the present invention.

4 and 5 is a view showing a device for dissolving the third pure oxygen in the form of inorganic cloth in the sojunaju in which the first pure oxygen is dissolved in the present invention.

Figure 6 is a view showing a device for dissolving the fourth pure oxygen in the sojunaju in which the third pure oxygen is dissolved in the present invention.

7 is a view showing a device for dissolving the fifth pure oxygen in the sojunaju in which the fourth pure oxygen is dissolved in the present invention.

8 is a view showing a device for dissolving the sixth pure oxygen in the sojunaju in which the fifth pure oxygen is dissolved in the present invention.

9 is a graph showing the dissolved oxygen amount of the soju prepared in the present invention and its retention period.

<Explanation of symbols for main parts of drawing>

 10: Suzhou Naju

100: first bubble dissolving device 110: first oxygen generating device

120: first oxygen supply line 121: first pressure gauge

130: first air stone 140: first storage tank

150: first oxygen bubble 160: the first Suzhou Naju dissolved

200: first inorganic oxygen dissolving apparatus 210: container

230: second oxygen generator 231: second pure oxygen

250: circulating piping 251: pressurized pump

253: nozzle 253a: tapered end of additional nozzle ball

253b: Liaison 260: Suzhou Naju where the second pure oxygen is dissolved

300: second inorganic dissolving device 310: filter

320: third pure oxygen supply line 330: first transfer pipe

340: first cooler 351: check valve

361: solenoid valve 371: second pressure gauge

381: Dissolved oxygen system 390: Suzhou naju in which the third pure oxygen is dissolved

400: third inorganic dissolving device 410: permeable contact membrane

420: fourth pure oxygen supply line 430: Suzhou Naju where the fourth pure oxygen is dissolved

500: third bubble melting apparatus 510: cooling tube

520: fifth oxygen supply line 521: fourth pressure gauge

530: third air stone 540: third transfer pipe

550: Fifth pure oxygen bubble 560: Suzhou naju in which the fifth pure oxygen is dissolved

600: fourth bubble dissolving device 610: air curtain

620: air nozzle 630: sixth oxygen bubble

Claims (5)

In the manufacturing method of shochu, After diluting the alcoholic alcohol having 95% alcohol concentration to the alcohol concentration of 40 to 60% first, aging it for 7 to 10 days at room temperature, and diluting it twice to dilute the alcohol concentration of 20 to 36%. A first step of manufacturing; A second step of deodorizing the dilution with activated carbon and then refining it with far infrared rays and silver particles to prepare a refining solution; A third step of preparing soju or sake by adding food additives to the tablet solution and mixing the mixture; A fourth step of aspirating and dissolving first pure oxygen through the first air stone in the soju and naju; After storing the soju-naju in which the first pure oxygen is dissolved in the container, a pressure pump installed in the middle of the circulation pipe along the circulation pipe installed across the upper and lower sides of the container so that the tip is positioned inside the container. The circulating but injecting the second pure oxygen supplied from the outside into the circulation pipe through the pressurized pump and circulating, forming an additional nozzle hole of the tapered shape in the interior installed at the tip and contacting the inside and outside in front of the additional nozzle hole A fifth step of dissolving the second pure oxygen by injecting sojunaju in which the first pure oxygen into which the second pure water is injected is dissolved through the nozzles forming the first and second pure water; A sixth step of dissolving the third pure oxygen in the form of an inorganic bubble by flowing a sojunaju in which the second pure oxygen is dissolved along the outside of the filter having nano-sized pores surrounding the third pure oxygen supply line; A seventh step of dissolving the fourth pure oxygen by flowing the sojunaju in which the third pure oxygen is dissolved along the tubular permeable contact membrane disposed inside the fourth pure oxygen supply line; An eighth step of lowering the temperature by flowing the sojunaju in which the fourth pure oxygen is dissolved along the cooling tube, and then aeration of the fifth pure oxygen through the third air stone in the sojunaju whose temperature has decreased; A ninth step of bottling sojunaju in which the fifth pure oxygen is dissolved; And a tenth step of injecting a sixth pure oxygen into the bottle with an air nozzle, dissolving the bottled fifth pure oxygen in the dissolved sojunaju, and sealing the tenth step. A method of making shochu that dissolves a large amount of pure oxygen. The method of claim 1, In the fourth step, the first pure oxygen is aerated at 2 to 8 l / min for 3 to 20 minutes to dissolve, A method of making shochu that dissolves a large amount of pure oxygen. The method of claim 1, Dissolved oxygen amount of sojunaju the second pure oxygen produced in the fifth step is 30 ~ 35 ppm, A method of making shochu that dissolves a large amount of pure oxygen. The method of claim 1, Dissolved oxygen amount of sojunaju the third pure oxygen produced in the sixth step is 35 ~ 40 ppm, A method of making shochu that dissolves a large amount of pure oxygen. It is manufactured by the manufacturing method of any one of claims 1 to 4, Characterized in that the final alcohol concentration is 17 to 25%, and the dissolved oxygen level is maintained at 40 to 50 ppm for 30 to 40 days, Shochu with a large amount of dissolved oxygen.

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