KR20210111449A - manufacturing method of powder green tea - Google Patents

Abstract

The present invention relates to a method for manufacturing a sweet rice drink containing a powdered green tea, and more specifically, to a method for manufacturing a sweet rice drink containing a powdered green tea capable of being useful for health by adding the powdered green tea after saccharifying only malt without hard-boiled rice and providing excellent preference. The method for manufacturing a sweet rice drink containing a powdered green tea of the present invention comprises: a malt immersing step of immersing the malt in water at 20-30℃ and soaking the same for 1-2 hours; a filtering step of obtaining a malt extracting liquid by sifting the water in which the malt is immersed after the malt immersing step to remove a residue; a solid-liquid separating step of placing the malt extracting liquid for 30-90 minutes and performing solid-liquid separation; a saccharifying step of maintaining a supernatant separated from the solid-liquid separating step for 5-10 hours at 60-70℃ and saccharifying the supernatant; a boiling step of boiling the supernatant obtained in the saccharifying step for 10-30 minutes; and an adding step of cooling the boiled supernatant after the boiling step and adding the powdered green tea to the supernatant.

Description

The manufacturing method of matcha sikhye {manufacturing method of powder green tea}

The present invention relates to a method for producing matcha sikhye, and more particularly, to a method for producing matcha sikhye useful for health and excellent in taste by adding matcha after saccharifying it with malt alone without godubap.

Sikhye is a traditional Korean traditional food made by steaming rice, pouring malt extract, fermenting it, rinsing the grains of rice in cold water, adding sugar and ginger to the water, boiling it, and then floating the grains of rice.

The conventional sikhye manufacturing method differs slightly depending on the region and household, but after immersing a certain amount of malt in water and kneading it well, take the supernatant, soak it for 50 minutes, pour it into steamed rice, and keep it warm to cause saccharification by enzymes. However, when 5 to 10 grains of rice float up, it is common to use this as the end point of saccharification, add sugar, etc., and boil it.

Sikhye, a beverage made from rice, is nutritious and flavorful, so it was made into sikhye with a variety of tastes and flavors using traditional manufacturing methods in each region. In particular, recently, sikhye is being developed to enhance the functionality by adding various substances in the manufacturing process of sikhye.

Korean Patent Laid-Open No. 10-2019-0090097 discloses Andong yam sikhye and a manufacturing method thereof, and Korean Patent Laid-Open No. 10-2014-0134991 discloses sikhye using Tobongryeong and a manufacturing method thereof.

However, the sikhye has a problem in that the added substances such as yam or Tobongryeong do not harmonize well with the sikhye, so that the preference cannot be improved. In addition, the conventional method of adding godubap to saccharify sikhye has a problem in that the taste and flavor are deteriorated because the sikhye is easily deteriorated.

1. Republic of Korea Patent Publication No. 10-2019-0090097: Andong yam sikhye and manufacturing method thereof 2. Republic of Korea Patent Publication No. 10-2014-0134991: Sikhye using Tobongryeong and its manufacturing method

The present invention was created to improve the above problems, and it is an object of the present invention to provide a method for producing matcha sikhye which is useful for health and excellent in taste by adding matcha after saccharification of malt alone without godubap.

In order to achieve the above object, the method for preparing matcha sikhye of the present invention comprises the steps of immersing malt in water at 20 to 30° C. and immersing it in malt for 1 to 2 hours; a filtering step of obtaining a malt extract by sieving the malt-immersed water through a sieve after the malt immersion step; a solid-liquid separation step of solid-liquid separation by allowing the malt extract to stand still for 30 to 90 minutes; a saccharification step of saccharifying the supernatant by maintaining the supernatant separated in the solid-liquid separation step at 60 to 70° C. for 5 to 10 hours; a heating step of boiling the saccharification solution obtained in the saccharification step for 10 to 30 minutes; and an addition step of cooling the boiled saccharification solution after the heating step and then adding matcha tea.

In the heating step, shiitake mushroom broth is added to the saccharification solution and then boiled.

The saccharification step is saccharification by adding 10 to 30 parts by weight of the mixed fermentation extract with respect to 100 parts by weight of the supernatant, and the mixed fermentation extract is a) a tuber of a pig potato ( Helianthus tuberosus ) and leaves of Pseudostellaria heterophylla ) After mixing 10 to 30 parts by weight of sugar with respect to 100 parts by weight of the mixed mixture, adding 2 to 10 parts by weight of a useful microbial group culture medium and fermenting at 20 to 40° C. for 30 to 90 days to obtain a fermented product, b; ) Grinding the fermented product with a mixer to obtain a fermented product; c) adding an extractant 4 to 10 times by weight to the fermented product and then extracting at 80 to 120° C. for 2 to 6 hours to obtain .

As described above, the present invention saccharifies only the malt extract without adding godubap. This is different from the conventional manufacturing method of sikhye in which godubap is added and saccharified. In this way, since sikhye is manufactured by saccharifying only malt extract without adding godubap, it is possible to prevent problems caused by the addition of godubap, that is, the color becomes cloudy and easily deteriorates, thereby reducing the taste and flavor.

In addition, the present invention can provide matcha sikhye useful for health and excellent in taste by adding matcha tea in the manufacturing process of sikhye.

In addition, the present invention can enhance the functionality of sikhye while maintaining the flavor and taste of sikhye for a long time by adding a mixed fermented extract in addition to matcha tea.

Hereinafter, a method for manufacturing matcha sikhye according to a preferred embodiment of the present invention will be described.

The manufacturing method of matcha sikhye according to an embodiment of the present invention comprises a malt immersion step called for 1 to 2 hours by immersing malt in water at 20 to 30 ° C. A filtering step to obtain a malt extract by removing It includes a saccharification step of saccharifying the supernatant, a heating step of boiling the saccharified solution obtained in the saccharification step for 10 to 30 minutes, and an addition step of cooling the boiled saccharified solution after the heating step and then adding matcha. Let's look at each step in detail.

1. Malt immersion step

First, the malt is immersed in water and soaked in water.

Malt is dried sprouted barley and contains saccharifying enzymes that saccharify starch.

The temperature of the water is preferably 20 to 30°C. Soak malt in water for 1 to 2 hours. After soaking in enough water, rub the soaked malt with your hands for about 5 minutes. This is to make the malt ingredients well excreted in water.

2. Fertilization stage

Next, the malt extract is separated from the residue by filtering the water in which the malt is immersed.

When a sieve is placed on the sieve and the water immersed in malt is poured into the sieve, the malt residue is filtered through a sieve, and the malt extract in liquid state passes through the sieve and is collected in the tub.

3. Solid-liquid separation step

Next, the malt extract is subjected to solid-liquid separation to obtain a supernatant.

Let the malt extract in the barrel stand for 30 to 90 minutes. When left still for 30 to 90 minutes, the relatively heavy solids settle to the lower layer due to the difference in specific gravity and are separated from the clear supernatant.

4. Saccharification step

Next, the supernatant separated in the solid-liquid separation step is saccharified to obtain a saccharified solution.

Conventional Sikhye is saccharified by putting godubap, but in the present invention, godubap is not added and only the supernatant separated from the malt extract is saccharified. Therefore, the present invention can prevent the problem caused by the addition of godubap, that is, the color becomes cloudy and the quality is easily changed, and thus the taste and flavor are reduced.

The supernatant can be saccharified by maintaining it at 60 to 70° C. for 5 to 10 hours. The supernatant is saccharified by the starch and enzymes contained in the malt.

In addition, sugar may be added to the supernatant to saccharify it to increase sweetness. In this case, 10 to 20 parts by weight of sugar may be added based on 100 parts by weight of the supernatant.

5. Heating step

Next, the saccharification solution is boiled for 10 to 30 minutes. This is to inactivate the enzyme and at the same time remove the peculiar smell of malt.

Remove the foam generated while boiling the saccharification solution by rolling it.

Meanwhile, in the heating step, shiitake mushroom broth may be added to the saccharification solution and then boiled. For example, 5 to 10 parts by weight of shiitake mushroom broth may be added based on 100 parts by weight of the saccharification solution. If you add shiitake mushroom broth, you can add the umami taste of sikhye.

To obtain shiitake broth, 10 to 20 parts by weight of dried shiitake mushrooms are mixed with respect to 100 parts by weight of water, and then left to brew at room temperature (20 to 30° C.) for 1 to 2 hours. We then filter through a sieve to obtain shiitake mushroom broth.

6. Addition step

Next, cool the boiled saccharification solution and then add matcha powder.

Matcha (powder green tea) is a type of powdered tea made by drying green tea leaves and then grinding them. The leaves are harvested from green tea grown under shading, dried, and then subjected to a screening process and then pulverized using a grinder to obtain matcha tea. Matcha tea contains less caffeine than green tea and contains abundant antioxidants, and is known to contain many beneficial ingredients such as L-theanine, which is mainly used in diet foods, and beta-carotene, which is effective in preventing free radicals. In addition, catechin, an astringent component contained in matcha, has strong antiviral and antibacterial effects and is known to be effective in inhibiting activity against viruses and harmful bacteria.

Green tea used in the manufacture of matcha can be grown in Boseong, Jeollanam-do.

2 to 10 parts by weight of matcha may be added based on 100 parts by weight of the saccharification solution. Matcha sikhye of the present invention is prepared by mixing well after adding matcha.

Since matcha is in the form of a fine powder, it is difficult to uniformly disperse the matcha in the saccharified liquid when the matcha is added to the saccharified liquid as it is. Therefore, it is preferable to add matcha to the saccharification liquid in a state in which the matcha has been previously opened in the liquid.

For example, take a certain amount from the boiled and cooled saccharification solution and put it in a bowl. Then, put matcha in a bowl and mix evenly with the saccharification solution. In this case, the ratio of matcha to saccharified solution is preferably 1:3 by weight. The matcha that has been beaten in a separate saccharified solution is added to the remaining saccharified solution and stirred well to evenly mix the matcha with the saccharified solution.

As described above, sikhye prepared by adding matcha tea is useful for health, and at the same time has a unique color of matcha and has excellent taste. In addition, the functionality of sikhye can be enhanced by the useful ingredients contained in matcha.

On the other hand, the present invention can be saccharified by adding a mixed fermentation solution in the above-described saccharification step. For example, by adding 10 to 30 parts by weight of the mixed fermentation extract with respect to 100 parts by weight of the supernatant, saccharification can be obtained by saccharification at 60 to 70° C. for 5 to 10 hours.

The mixed fermented extract is extracted after fermenting a mixture of pork potato and samosaurus. In the present invention, the pork potato uses tubers, and the individual island flowers use leaves.

Potato pig ( Helianthus tuberosus ), also called tung calf, is a yellow-flowered asteraceae plant that grows to 15~3m in height.

Pork potato has recently been found to have antioxidant effects because the extract contains a large amount of phenolic compounds. In addition, pork potatoes are known to be non-toxic and have anti-diabetic activity that stabilizes blood sugar, so they have a high use value as a functional health food that is very good for preventing and treating diabetes, an adult disease of modern people.

Pork potato consists of 80% water, 15-20% carbohydrates, 1-2% protein, and minerals and vitamins. Unlike normal plants, which store carbohydrates in the form of starch, pork potatoes have the characteristic of storing most of the carbohydrates as fructose polymers called inulin. The proportion of inulin is high enough to account for 14-19% of the raw weight of pork potatoes. Inulin is a type of storage polysaccharide present in colloidal form in pork potatoes. Inulin is an indigestible dietary fiber that cannot be digested by digestive enzymes in our body. Because of these indigestible characteristics, inulin intake is recommended for diabetic patients. In addition, since inulin is a polymer of fructose, it is a kind of natural sweetener.

As described above, the tuber of pork potatoes containing a large amount of inulin can significantly improve the flavor and taste of sikhye by providing starch and sugar.

Pseudostellaria heterophylla is a perennial grass of the family Pseudomonas that grows in the forest. The leaves at the end of the stem look like two pairs of leaves, and they are broad ovate, 3-6 cm long and 1-2 cm wide, light green. Isolate flower has excellent antioxidant and antibacterial activity, so it suppresses deterioration and rancidity of sikhye. In particular, when the isolate flower and pork potato are used together, the antioxidant and antibacterial activity can be greatly improved by the synergistic effect.

To obtain the mixed fermented extract, first, the tuber of the pig persimmon and the leaf of the isola flower are mixed in a weight ratio of 1:0.1 to 0.5. And 10 to 30 parts by weight of sugar is mixed with respect to 100 parts by weight of a mixture of the tuber of the pig persimmon and the leaves of the isola flower. And the useful microbial group culture solution is further added based on 100 parts by weight of the mixture.

The useful microbial group culture medium is a culture of one or more effective microbial groups among photosynthetic bacteria, yeast, lactic acid bacteria, actinomycetes, and filamentous fungi. As an example of a medium for culturing useful microorganisms, it can be prepared by adding 20 g of sugar or molasses to 18 liters of rice water. After inoculating the useful microbial group in the medium, it can be cultured at 30 to 40° C. for 2 to 8 days to obtain a useful microbial group culture solution. In addition, it goes without saying that commercialized useful microbial group products can be purchased and used in the market as a useful microbial group culture solution.

After adding sugar and a culture medium of useful microorganisms to the mixture, the mixture is fermented at 20 to 40° C. for 30 to 90 days. Then, the fermented product is ground with a mixer to obtain a fermented product. And after adding 4 to 10 times the extraction solvent to the fermented crushed product by weight, extraction is performed at 80 to 120° C. for 2 to 6 hours, followed by filtration to obtain a mixed fermentation extract.

At least one selected from water, a lower alcohol having 1 to 4 carbon atoms, a polyhydric alcohol, or a mixture thereof may be used as the extraction solvent. Methanol, ethanol, etc. can be used as a C1-C4 lower alcohol, and butylene glycol, propylene glycol, pentylene glycol, etc. can be used as a polyhydric alcohol. And as the mixture, a mixture of water and a lower alcohol, a mixture of water and a polyhydric alcohol, a mixture of a lower alcohol and a polyhydric alcohol, or a mixture of water and a lower alcohol and a polyhydric alcohol may be used.

Hereinafter, the present invention will be described in detail through the following examples. This is for explaining the present invention in more detail, and the scope of the present invention is not limited to the following examples.

(Example 1)

Malt extract was prepared by immersing malt in water and soaking for 90 minutes, then casting for 5 minutes by hand, then sieving it through a sieve. After allowing the malt extract to stand for 60 minutes to separate the supernatant, 15 parts by weight of sugar was added to 100 parts by weight of the supernatant and saccharified at 65° C. for 7 hours. Then, the saccharification solution was boiled for 20 minutes to remove the foam, and then cooled at room temperature. Then, 6 parts by weight of matcha (Boseong Imbyeongmun Matcha, Imbyeongmun Teawon) was added to 100 parts by weight of the cooled saccharified solution, and then mixed well to prepare matcha sikhye.

(Example 2)

20 parts by weight of the mixed fermentation extract was added to 100 parts by weight of the supernatant prepared in the same manner as in Example 1, and saccharification was carried out at 65° C. for 7 hours. Then, the saccharification solution was boiled for 20 minutes to remove the foam, and then cooled at room temperature. Then, 6 parts by weight of matcha was added to 100 parts by weight of the cooled saccharified solution, and then mixed well to prepare matcha sikhye.

The mixed fermentation extract was prepared in the following way.

20 parts by weight of sugar and 2 parts by weight of a useful microbial group culture solution (EM-1, Ever Miracle Co., Ltd.) are added to 100 parts by weight of a mixture of the tuber of the pig persimmon and the leaves of the isola flower in a weight ratio of 1:0.3. After that, it was fermented at 30°C for 60 days. Then, the fermented fermented product was ground with a mixer to obtain a fermented pulverized product, and then water was added 6 times by weight, extracted at 90° C. for 5 hours, and filtered to obtain a mixed fermentation extract.

(Comparative example)

Commercially commercialized products (Paldo, Birak Sikhye) were purchased and used.

Sensory tests and antioxidant activity tests were performed on the ginseng drinks of Examples 1 and 2 and Comparative Examples prepared as above.

<sensory test>

Appearance, aroma, taste, and overall preference for Sikhye in Examples 1 and 2 and Comparative Examples were evaluated on a 7-point scale using a trained panel (1 point very bad; 2 points bad; 3 points slightly bad; 4 points moderate; a little Good 5 points; Good 6 points; Very good 7 points). The results of the sensory test are shown in Table 1 below.

item Example 1 Example 2 comparative example Exterior 5.5 5.3 2.7 incense 4.1 4.8 3.0 taste 4.4 5.2 3.6 Comprehensive symbol map 4.2 5.1 3.0

Looking at the results of the sensory test, Examples 1 and 2 showed much higher scores in all aspects of appearance, flavor, taste, and overall preference compared to Comparative Examples. Therefore, in the present invention, the preference can be increased by adding matcha.

And comparing Example 1 and Example 2, it was found that there was no significant difference in appearance, but Example 2 was found to be higher than Example 1 in aroma, taste, and overall preference. This seems to be the result of increasing the preference by adding the mixed fermentation extract during the saccharification process.

<Antibacterial test>

In order to examine the antibacterial effect of the mixed fermentation extract, the sikhye of Examples 1 and 2 were left at room temperature for 5 days to collect a sample, and then the number of general bacteria was measured. The sample collected for the measurement of the number of bacteria was transferred to a sterile homogenizer and mixed with 45 mL of 0.5% peptone solution. This solution was again sequentially diluted with 0.5% peptone solution, and 0.1 mL of the diluted solution was smeared on a standard plate count agar and cultured at 35 ° C. The results are shown in Table 2 below.

division Normal bacterial count (CFU/ml) Example 1 2.5×10 ⁴ Example 2 3.7×10 ²

Looking at the results of Table 2, it was confirmed that Example 2 to which the mixed fermentation extract was added effectively inhibited the proliferation of microorganisms compared to Example 1. Accordingly, when sikhye is prepared by adding the mixed fermentation extract, it is expected that long-term preservation can be improved by suppressing deterioration caused by microorganisms.

<Antioxidant experiment>

Antioxidant activity was tested using Sikhye of Examples 1 and 2 and Comparative Examples as samples. Antioxidant activity was measured by scavenging ability for 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. After mixing 10 g of sample and 200 mL of distilled water, extraction was repeated three times at 100 °C for 1 hour each. Each extract was concentrated under reduced pressure and then freeze-dried at -80°C to prepare a final extract. 600 μL of an extract having a concentration of 1 mg/mL dissolved in distilled water and 300 μL of a 0.2 mM DPPH solution were reacted for 30 minutes, and absorbance was measured at 517 nm with a spectrophotometer to calculate DPPH radical scavenging ability (%). The measurement results of the radical scavenging ability are shown in Table 3 below.

division DPPH radical scavenging ability (%) Example 1 25.8±0.7 Example 2 41.3±0.6 comparative example 18.6±0.4

Referring to the results of Table 3, the radical scavenging ability of Examples 1 and 2 was higher than that of Comparative Examples. In particular, Example 2 was found to be at least two times higher than that of Comparative Example. Accordingly, sikhye with mixed fermented extract is expected to have an excellent ability to inhibit rancidity.

As mentioned above, although the present invention has been described with reference to the embodiments, these are merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent embodiments are possible therefrom. Accordingly, the true protection scope of the present invention should be defined only by the appended claims.

Claims (3)

Malt immersion step called for 1 to 2 hours by immersing the malt in water at 20 to 30 ℃;
a filtering step of obtaining a malt extract by sieving the malt immersed water through a sieve after the malt immersion step;
a solid-liquid separation step of solid-liquid separation by allowing the malt extract to stand still for 30 to 90 minutes;
a saccharification step of saccharifying the supernatant by maintaining the supernatant separated in the solid-liquid separation step at 60 to 70° C. for 5 to 10 hours;
a heating step of boiling the saccharification solution obtained in the saccharification step for 10 to 30 minutes;
and an addition step of cooling the boiled saccharified liquid after the heating step and then adding matcha tea. The method according to claim 1, wherein in the heating step, shiitake mushroom broth is added to the saccharified liquid and then boiled. According to claim 1, wherein the saccharification step is saccharification by adding 10 to 30 parts by weight of the mixed fermentation extract with respect to 100 parts by weight of the supernatant,
The mixed fermentation extract is a) a mixture of tubers of a pig potato ( Helianthus tuberosus ) and leaves of Pseudostellaria heterophylla ( Pseudostellaria heterophylla ) After mixing 10 to 30 parts by weight of sugar with respect to 100 parts by weight of a mixture of useful microorganisms culture medium 2 to A step of fermenting for 30 to 90 days at 20 to 40 ℃ by adding 10 parts by weight to obtain a fermented product, b) grinding the fermented product with a mixer to obtain a fermented product, c) to the fermented product A method of producing matcha sikhye, characterized in that it is obtained by adding an extraction solvent 4 to 10 times by weight and then extracting at 80 to 120° C. for 2 to 6 hours.