JPH02253895A - Production of brewing water for refined sake - Google Patents

Abstract

PURPOSE:To obtain the process for producing the brewing water for refined SAKE (refined Japanese wine) which can easily reform brewing water of a low hardness to high-hardness water by subjecting low-hardness water to a blowing of carbon dioxide and contact of limestone, then to filtration with activated carbon. CONSTITUTION:The brewing water W supplied to an elution tank 21 passes a limestone tank 31 and stored water 28 is obtd. in the tank bottom. The carbon dioxide is blown into this water by a carbon dioxide blowing means 29. The water 28 is lifted to the top of the tank 21 by a water flow pump 22 and is dropped into the tank to come into contact with the tank 31, by which stored water 28 is produced. The blowing of the carbon dioxide and the contact of the limestone are repeated for a prescribed period of time until the water of about 180 to 220ppm hardness contg. Ca<++> ions is obtd. The stored water 28 is thereafter fed by a feed pump 35 to a filter 23 and after foreign matter is removed from the water, org. matter is removed therefrom in the carbon bed of an activated carbon filter tank 24. This filtered water W is introduced into a storage tank 25 where the water is cooled to <=10 deg.C and is held. The water is fed as the brewing water at need to the stage for fermenting the refined SAKE.

Description

[Detailed description of the invention] [Industrial Application Field J This invention relates to a method for producing sake brewed water.

[Prior Art] In general, it is said that sake brewing water should have a high total hardness (hereinafter simply referred to as hardness) of CaCO3, such as 1)I)l of about 200, as shown in Nada Kanbon. There is. Conventionally, water with the highest possible hardness, which is close to Miyamizu, is selected and used.

[Problems to be Solved by the Invention] However, there has been a problem in sake brewing factories that it is difficult to obtain brewed water with a desired hardness. Therefore, an object of the present invention is to provide a method for producing sake brewed water that can easily modify brewed water with a low hardness of, for example, 360 ppm of CaCO to a hardness of about 200 ppm of CaCO (7).

[Means for Solving the Problems] The means of the present invention for solving the above-mentioned problems includes blowing carbon dioxide gas into low-hardness water used for brewing sake and bringing it into contact with limestone, and, if necessary, It is said to be a method for producing 8IWAs water, in which the blowing of carbon dioxide gas and contact with limestone are repeated, and then the water is filtered with activated carbon to obtain treated water.

[Work] Water with low hardness becomes slightly acidic by blowing carbon dioxide gas into it.

When the slightly acidic water comes into contact with limestone, it becomes water containing Ca++ ions. Activated carbon filtration mainly removes organic substances by adsorption.

[Test example] Next, Test F according to the present invention will be explained.

First, a small-scale test apparatus shown in FIG. 1 was prepared, and a test was conducted to increase the hardness of well water W used as brewing water.

In the test equipment, 1 is an elution tank containing 2 to 2 limestones, 3
4 is a water pump, 4 is a cartridge type filter with a filtration particle size of 1 μm, 5 is a cartridge type activated carbon filter containing fibrous activated carbon, and 6.7.8 is an on-off valve. The elution tank 1 is connected via a water pump 4 to connecting pipes 9 and 10 as shown in FIG.

The well water W from the elution tank 1 passes through the water pump 3, the filter 4, and the activated carbon filter 5 to reach the storage tank 11), and the well water W from the elution tank 1 passes through the water pump 3 and the filter. 4 and a path opening for circulation to the elution tank 1.

In addition, the well water W used in the test was water collected from "Kamenoi" which gushes out in the precincts of Matsuo Taisha Shrine, Kyoto City.

Test Example 1 51 well water W was put into elution tank 1 containing 18μ of 2C11 block limestone, and treated at room temperature for 2 hours at the above-mentioned channel opening (water flow 12541/sin) L, storage tank 11
to obtain treated water NQI (treated water WA).

Test Example 2 The treated water Nα1 obtained in Test Example 1 was stored in the storage tank 11 for 24 hours.
After standing for a while, the treated water was transferred to the elution tank 1, and after being circulated for 2 hours at room temperature, it was returned to the storage tank 11 and the treated water N0
2 (treated water WA) was obtained.

Test Example 3 100g of dry ice was put into the elution tank 1 of the test device,
After 15 minutes after the completion of evaporation, the water is circulated for 1 hour through the path (to), and then introduced into the storage tank 11 where the treated water Nα3 (treated water WA
> obtained.

pH and total hardness (CaCO3ppm
) were as shown in Table 1.

From Table 1, it can be seen that in the treated water Nα1 and the treated water NQ2, there is almost no elution of Ca+F ions from limestone in a steady state. However, when circulating for a long time, the hardness increases slightly, but the pH value decreases slightly, which suggests that carbon dioxide gas in the air was absorbed and eluted in the form of calcium hydrogen carbonate. Treated water No. 3 is p
Although the H value decreased a little too much, it was recognized that the hardness was greatly increased.

Test Example 4 Based on the above-mentioned test examples, the practical device shown in FIG. 2 was prepared and tested. In the practical device, 21 is an elution tank, 22 is a water pump for water circulation, 23 is a filter with a filtration particle size of 1 μm, 24 is an activated carbon filtration tank, and 25 is a storage tank for treated water WA. The storage tank 25 is connected to a cooler 26 so that the treated water can be kept cool. At the top of the elution tank 21, a well water supply pipe 27 for producing fresh water is arranged, and at the bottom of the tank there is a carbon dioxide gas blowing means 2 for blowing carbon dioxide into the water stored in the tank.
9 is provided. In addition, in Test Example 3 described above, carbon dioxide gas was supplied using dry ice, but since it is difficult to control the dissolution ω of dry ice, means 2 for directly blowing carbon dioxide gas was used.
9 was adopted. Water storage 28 inside the tank is handled by a water pump 22 outside the tank.
The liquid is dropped into the elution tank 21 from the upper part of the tank through the elution tank 21.

30 is a guide plate arranged at the upper part of the tank, 31 is a guide plate 3
It is a limestone layer located below 0. Each device section is connected through connecting pipes 32, 33, and 34 as shown in FIG.

That is, the well water W for brewing supplied to the elution tank 21 passes through the limestone layer 31 and becomes the water storage 28 at the bottom of the tank. Water storage 2
Carbon dioxide gas is blown into 8.

On the other hand, the water reservoir 28 is pumped up to the top of the elution tank 21 by the water pump 22 and dropped into the tank, and comes into contact with the limestone layer 31 to become the reservoir water 28, and the blowing of carbon dioxide gas and the contact with the limestone are repeated for a predetermined period of time. , hardness 18 containing Ca++ ions
0 to 220 pf) The water will have a culm degree of Ill. After that,
The stored water 28, that is, the treated water, is sent to the filter 23 via the feed pump 35, and after foreign substances are removed, it is transferred to the activated carbon filtration tank 2.
Organic matter is removed in the activated carbon layer No. 4, and this filtered water WA is introduced into the storage tank 25. The treated water WA in the storage W425 is cooled and maintained at 10° C. or lower. The cooled treated water WΔ in the storage tank 25 is sent to the sake brewing process as brewing water if necessary.

Therefore, the well water shown in Table 1 was treated with the above-mentioned practical equipment under conditions 1 and 2 shown in Table 2, and the treated water Nα4 shown in Table 3 was
-1 and treated water Nα4-2 were obtained.

As shown in Table 3, the treated ice island 4 obtained in Test Example 4
-1 and treated water No. 4-2 have hardness preferable as WA water production for sake.

According to the practical device of Test Example 4, brewed water with low hardness is reformed into water with any high hardness. Note that the filter 23 in the practical device may be omitted, and the activated carbon filtration tank 24 may be used to remove foreign substances and organic substances. In addition, in a practical device, the flow rate of carbon dioxide gas, the amount of circulating water, and the circulation time can be determined as appropriate.

[Effect of the Invention 1] In the present invention, carbon dioxide gas is blown into low-hardness water for sake brewing and contact with limestone is carried out, so that Ca++ ions, which are a component of limestone, are contained in the treated water. The layer containing Ca ions can be increased by repeating the injection of carbon dioxide gas and contact with limestone,
It can be made into brewed water with a high hardness of about 200 pp.

Furthermore, since the treated water of the present invention is filtered water that has been filtered with activated carbon, foreign substances and organic substances have been removed, making it preferable as brewing water for sake. Note that the present invention is easy to implement because it does not require any special processing steps.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the test equipment, and Figure 2 is the structure of the practical equipment.
1 is an explanatory diagram. 21... Elution tank 22... Water pump 23... Filtration machine 24... Activated carbon filtration tank 25... Storage tank 28... Water storage 29... Carbon dioxide gas blowing means 31...limestone layer

Claims (1)

[Claims] (1) Blow in carbon dioxide gas and contact with limestone into low-hardness water used for brewing sake, repeat the blowing of carbon dioxide gas and contact with limestone if necessary, and then pour this water into activated carbon. A method for producing sake brewing water characterized by obtaining treated water through filtration.