KR101894370B1 - manufacturing method of rice powder - Google Patents

Abstract

The present invention relates to a method for producing rice flour, and more particularly, to a method for producing rice flour capable of preventing generation of wastewater while reducing starch damage by pulverizing rice after water is absorbed by water spraying ≪ / RTI >
The method for producing rice flour of the present invention comprises the steps of removing foreign matter by removing wind and foreign matter from the rice, spraying water to the rice to absorb water, and spraying the rice with water content of 10 to 20 And a milling step of pulverizing the rice dried in the drying step to a size of 100 to 300 mesh to produce a flour.

Description

Manufacturing method of rice powder [0002]

The present invention relates to a method for producing rice flour, and more particularly, to a method for producing rice flour capable of preventing generation of wastewater while reducing starch damage by pulverizing rice after water is absorbed by water spraying ≪ / RTI >

Breads means breads, cakes, breads, donuts, etc., made by adding other food or food additives to the main ingredients of the flour.

As the level of living has improved recently, consumers' preferences for foods have become more diverse and advanced, and they tend to prefer processed foods that are easy to cook and have a high preference for taste.

Among them, breads have been transformed into westernization of eating habits and favorable eating habits, and consumption has been greatly increased as a substitute substitute for rice.

In general, wheat flour, which is used as the main raw material for bakery products, depends on imports. This increase in consumption of bakery products leads to a decrease in rice consumption. The consumption of domestic rice is becoming less and less, while the production of rice is not significantly decreased, and the inventory rate is increasing day by day.

Therefore, in order to solve the problem of the food shortage which is predicted in the future, it is demanded to expand the use of the rice, which is a balanced food having a higher yield per unit area than the wheat and a nutritionally superior balance, and to increase the consumption amount thereof.

Milling methods of rice flour, which can be used mainly for rice cakes, breads and noodles, can be divided into dry milling and wet milling.

Dry batching is simple and economical because it is economical, but it has a disadvantage that starch damage is great and the rice cake is not well formed. On the contrary, wet batching method is excellent in quality but requires a lot of time for drying and water pollution Currently, commercial rice flour is manufactured by dry milling.

However, in the case of the rice cake making industry where the rice flour is most used, the rice cake made of the dry milled rice flour is not good in quality, so the rice cake is made by making the rice flour by the wet batching method.

Korean Patent Publication No. 10-2015-0112394 discloses a method for producing diet rice and rice flour.

In the above patent, the washed rice is immersed in ordinary tap water, ground water, distilled water or the like, and is called for about 24 hours, followed by pulverization to obtain a powder.

However, the wet batching method for making rice cake is made by the conventional method in which the rice is dipped in water and then the water is removed and the rice is milled, but since it is wet milling, it must be stored in the refrigerator. do. In addition, since it is milled after being called water for about one day, it takes 26 to 30 hours and there is a problem that a large amount of waste water is discharged.

Korean Patent Publication No. 10-2015-0112394: Method for producing diet rice and rice flour, and diet rice and rice flour produced thereby

The present invention has been made to solve the above problems, and it is an object of the present invention to provide a method and apparatus for preventing the generation of wastewater and shortening the manufacturing time by pulverizing rice after water is absorbed into rice by spraying water instead of dipping rice in water And it is an object of the present invention to provide a method for producing rice flour which can be stored at room temperature for a long time.

In addition, the present invention relates to a rice flour which is capable of effectively infiltrating moisture into the inside of rice by performing a process of spraying water to rice twice and spraying it, and roughly crushing rice between the first spray and the second spray And a manufacturing method thereof.

In order to accomplish the above object, the present invention provides a method for manufacturing rice flour, comprising the steps of: removing foreign matter by applying wind to rice; A spraying step of spraying water on the rice to absorb water in the rice; A drying step of drying the rice to a water content of 10 to 20% by weight after the spraying step; And a milling step of pulverizing the rice dried in the drying step to a size of 100 to 300 mesh to produce a powder.

Wherein the spraying step comprises: a) a first spraying step of spraying water on the surface of the rice with water by first spraying water on the foreign matter removed from the foreign material removing step, and b) A step of crushing the rice to a size of 10 to 100 mesh after the step of infiltrating the first water; d) a step of crushing the rice in a crushing step A second spraying step of spraying water on the crushed rice flakes and soaking the flakes with water; e) a second infiltration step in which the rice flakes are left for 10 to 60 minutes after the second spraying step to permeate moisture into the rice flakes .

And the second spraying step is carried out by mixing at least any one selected from the extract of Hwanyeolmuchi and the extract of Yeonju with the water.

And mixing the rice flour with at least one selected from a woodchuck powder and a flour powder after completion of the milling step.

As described above, according to the present invention, unlike the conventional method in which rice is immersed in water, water is sprayed to rice to absorb water into rice and then milled, thereby saving water, preventing the generation of wastewater, Can be greatly shortened.

In addition, the present invention can effectively infiltrate moisture to the inside of rice in a short time by performing a process of spraying water to rice twice by spraying and roughly crushing rice between the primary spray and the secondary spray.

In addition, the present invention can provide a rice flour of high quality and high functionality because it can add functionality to rice flour by containing beneficial components of woody spruce and quinceanera.

Hereinafter, a method for producing rice flour according to a preferred embodiment of the present invention will be described in detail.

The method for producing rice flour of the present invention comprises the steps of removing foreign matter by removing wind and foreign matter from the rice, spraying water to the rice to absorb water, and spraying the rice with water content of 10 to 20 And a milling step of pulverizing the rice dried in the drying step to a size of 100 to 300 mesh to produce a flour. We will look at each step in detail.

1. Remove foreign matter

After purchasing rice, it is packed and purchased as rice.

The present invention is not a method of washing rice with water to remove foreign matter, but blowing wind to remove foreign matter. When the rice is washed with water, it is completely removed with the removal of impurities, such as rice flour or rice flour attached to the surface of the rice during the ripening process.

Accordingly, the present invention applies a method of blowing foreign matter mixed in between rice grains by blowing wind to minimize the maintenance of nutritious rice grains and rice gruel. The intensity of the wind is adjusted to the extent suitable for removing foreign matter. The rice may be spread over a conveying means such as a conveyor belt, and then blown on moving rice to remove foreign matter.

2. Spray

Next, water is sprayed on the rice to absorb moisture in the rice. Water uses drinking water, tap water, or bottled water. Spraying water on the surface of rice using a spraying method can be applied.

These spraying methods supply only the necessary amount of water to the rice soaking, so there is no generation of wastewater. Therefore, when compared with a conventional method of soaking rice in a large amount of water for a day, there is no occurrence of wastewater, and the process of absorbing moisture into rice is very fast.

In order to absorb moisture to the inside of rice by spraying water on rice, it is possible to apply a large amount of water at one time, but in this case, the time for penetration of moisture to the inside of rice becomes relatively long.

Therefore, preferably, water is sprayed by dividing into two portions, and the process of roughly crushing the rice between the first spray and the second spray is performed, so that moisture can be effectively penetrated into the rice in a short time.

For example, the spraying step may include a first spraying step of spraying water on the surface of the rice by first spraying water on the rice, and a first spraying step of spraying water onto the surface of the rice by leaving the rice for 10 to 60 minutes after the first spraying step A crushing step of crushing the rice to a size of 10 to 100 mesh after the infiltration step and the first infiltration step, a second spraying step of spraying water to the crushed rice pieces in the crushing step and soaking the water with water, And a second infiltration step of allowing the rice flakes to remain for 10 to 60 minutes to allow water to penetrate into the rice flakes.

In the first spraying step, it is sufficient to spray only the amount of water to wet the surface of the rice. Accordingly, 2 to 20 parts by weight of water may be sprayed per 100 parts by weight of the rice during the first spraying.

During the first spraying, the rice is put into an agitator equipped with a rotating stirring impeller and sprayed with water to spray water on the surface of each rice grain so that the water can be evenly wetted.

After the first spraying step, a first infiltration step is performed in which the rice is left to stand for a certain time so that moisture can permeate the surface of the rice.

The primary infiltration step may, for example, leave the primary sprayed rice for 10 to 60 minutes. Through the first penetration step, the water sprayed on the surface of the rice penetrates into the surface of rice and is absorbed. At this time, the penetration of moisture does not need to penetrate deep inside the rice. The first spraying step is sufficient to penetrate the surface of the rice or the surface of the rice to about 0.1 to 1 mm.

After the first penetration step, a crushing step is performed to crush the rice.

For example, the shredding step crushes the rice to a size of 10 to 100 mesh. This crushing step is a rough grinding process of rice. This is different from the point that the milling step described below is a pulverization process that finely pulverizes rice.

Through the crushing step, each of the rice balls is broken into pieces of 10 to 100 mesh size. Therefore, it is possible to penetrate the inside of the rice flakes deeply in the second spraying step in a short time.

After the crushing step, a second spraying step is carried out in which the crushed rice pieces are sprayed with water in a second order. The rice flakes are wetted with water through the second spray step. In the case of the secondary spray, 5 to 15 parts by weight of water may be sprayed per 100 parts by weight of the rice flakes.

During the second spraying, the pieces of rice are poured into an agitator equipped with a rotating stirring impeller, and sprayed with water to spray the rice so that the water is uniformly wetted on each piece of rice.

After the second spraying step, a piece of rice is allowed to stand for 10 to 60 minutes to carry out a second infiltration step of infiltrating moisture into the inside of the rice flakes.

3. Drying

As above, the pieces of rice having passed through the first spraying step, the first infiltration step, the crushing step, the second spraying step, and the second infiltration step are dried before milling.

The moisture content of the rice is maintained at 10 to 20 wt% by drying. If the moisture content of the rice is less than 10% by weight, the damage of the starch during milling becomes large. When the moisture content exceeds 20% by weight, milling becomes difficult and storage at room temperature is difficult.

Drying can be done by applying cold wind or warm wind. For example, cold air of 0 to 10 degrees or warm air of 20 to 40 degrees can be applied to dry.

4. Milling

The rice dried in the drying step is pulverized into fine powder. It can be milled to a size of 100 to 300 mesh using conventional milling.

The rice flour thus prepared can be used as a material for bread, rice cakes and cotton instead of flour.

Unlike the conventional method in which rice is immersed in water, the above-described method of spraying water on rice to absorb water into rice and then milling the rice can be used to water the rice, prevent the generation of wastewater, and shorten the manufacturing time have.

In addition, the present invention can effectively infiltrate moisture to the inside of rice in a short time by performing a process of spraying water to rice twice by spraying and roughly crushing rice between the primary spray and the secondary spray.

Meanwhile, as another embodiment of the present invention, the water used in the second spraying step may be a mixture of at least one selected from the extract of Hwangchil-myeon and the extract of Yeoju.

The Huangchil extract means obtained from various organs or parts of woody trees (for example, leaves, flowers, roots, stems, branches, bark and seeds) and is preferably obtained from leaves, stems, branches, Means an extract.

Dendropanax morbifera ) is an evergreen tree belonging to Araliaceae with a maximum height of 15m. It can be seen in some parts of the southern coast of Korea. When it is scratched on the bark of Yellowwood, it is called yellowish liquor. It is a medicinal plant whose pharmacological efficacy is so good that it has a scientific name of Dendro-panax.

Hwangchil, a sap that is collected from the bark of Hwangchu-gil, has been attracting attention as an excellent pharmacological effect since ancient times and it has been found to be effective for anti-cancer, hepatocyte regeneration, diabetic treatment, and hard tissue cell regeneration according to recent research results. In addition, Huangchil has also been reported to be effective against hypertension, stroke, and dementia. In addition, it is known to be effective for antibacterial effect, treatment of digestive diseases, tonic effect, depression and relieving stress.

The extracts of Hwangchil - myeon have excellent antimicrobial activity and antioxidant activity and can inhibit the decay and oxidation of rice flour, which can increase the storage stability of rice flour.

Yeoju extract is extracted from Yeoju 's fruit.

Momordica charantia ) is a plant belonging to the genus Bacillus, which grows mainly in tropical or subtropical areas and uses fruit for food. The juice is green, and when it matures, it turns orange. When the time passes, the flesh bursts and the red seeds are exposed, and the seeds are generally brown. The main component of the yeast is the peptide, charantin, which is contained in the fruit and has a molecular weight of about 93.7 kDa. It is known that insulin-like substances, which are activated by beta-cells that play a crucial role in insulin secretion, contribute to blood glucose regulation ultimately. In addition, p-coumaric acid, taninic acid, benzoic acid, ferulic acid, gallic acid, etc. are used as phytochemicals in the fruit, root, , Caffeic acid and catechin (Kubola and Siriamornpum, Food Chemistry, 2008, 110: 881-890). Recently, it has been reported that it can be used for the treatment of diabetes (Miura T. et al., J. Nut Sci. Vitaminol, 47 (5), 340-344, 2001; Grover JK, et al. J. Ethnopharmacol., 76 (3), 233-238, 2001).

As described above, Yeoju has various physiological activities and is very useful for health.

The extract can be extracted by various methods. For example, in order to obtain an extract, an extracting solvent may be added to Hwangchujang or Yeoju berries, followed by hot water extraction, cold beating or warming extraction. In this case, the extraction solvent is added to the Hwigae-myeon or Yeoju at a weight ratio of 2 to 20 times and then the extraction is carried out at 10 to 150 ° C for 1 to 24 hours. The extraction solvent may be at least one selected from water, lower alcohols having 1 to 4 carbon atoms, polyhydric alcohols, and mixtures thereof. As the lower alcohol having 1 to 4 carbon atoms, methanol, ethanol and the like can be used. As the polyhydric alcohol, butylene glycol, propylene glycol, pentylene glycol and the like can be used. Mixtures of water and lower alcohols, mixtures of water and polyhydric alcohols, mixtures of lower alcohols and polyhydric alcohols, or mixtures of water and lower alcohols and polyhydric alcohols can be used as the mixture.

In addition, the extract can be obtained by using reflux cooling extraction, ultrasonic extraction, supercritical fluid extraction, or the like. It goes without saying that the extract can be used as a concentrate obtained by concentrating the extract in a conventional manner.

At least one of the extracted Hwanyeok tree extract and Yeoju extract is mixed with water and sprayed onto a piece of rice during the second spraying. For the convenience of explanation, a mixture of at least one of the extract of Yulchak and extract of Yulchu is mixed with water.

For example, the penetration liquid may be obtained by mixing 10 to 100 parts by weight of the extract of Hwigulak extract on 100 parts by weight of water. The penetration liquid may be obtained by mixing 10 to 100 parts by weight of the extract of Latex with respect to 100 parts by weight of water. The penetrant can be obtained by mixing 10 to 100 parts by weight of the mixed extract with respect to 100 parts by weight of water. Here, the mixed extract was obtained by mixing the extract of Hwangchil and the extract of Yeoju at a weight ratio of 1: 0.5 ~ 1.5.

The prepared permeate is sprayed on the crushed rice pieces in the crushing step to carry out the second spraying step. In this case, 5 to 15 parts by weight of the penetrating liquid may be sprayed to 100 parts by weight of the rice flakes. Penetration liquid penetrates into the inside of rice and adds functionality to rice flour.

In another embodiment of the present invention, the rice flour obtained through the milling step may be blended with at least one selected from the group consisting of wood powder and powder. In this case, 0.1 to 5 parts by weight of at least one selected from a mixture of 100 parts by weight of the rice flour may be mixed. Grass seed and powder are ground to the same or similar size as rice flour.

The Hwangchil wood powder can be obtained by freeze drying after concentrating the above-described Huangchil extract at reduced pressure. Also, it can be obtained by drying and then grinding the leaves of Perilla leaf.

In addition, the fennel powder can be obtained by lyophilization after concentrating the above-described fennel extract under reduced pressure. It is also obtained by drying and then grinding the lychee fruit.

On the other hand, in addition to the above-mentioned Huangchu tree and Yeoju, there are also a variety of fruits such as Jujube, Aronia, Blueberry, Asaiberry, Guava, Dandelion, Cordyceps, Gugija, Pig Potato, Angelica gigas, Licorice, Bellflower, Corn oil, Mulberry leaf, Mushroom, mushroom, mushroom, pomegranate, onion, silkworm, mulberry, oatmeal, pumpkin, rice gruel, lotus leaf, yulmu, Extracts or powders extracted from corn, green tea, hwanggi, and the like can be further used.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the scope of the present invention is not limited to the following examples.

(Example 1)

The rice purchased from the market was blown with a blower to remove foreign matter. Then, rice was poured into a rotating agitator, and then 100 parts by weight of rice was sprayed with 10 parts by weight of water first, followed by allowing to stand for 30 minutes. Then, the rice was crushed to a size of about 50 mesh using a crusher, and then put into a rotating agitator. Then, 10 parts by weight of water was sprayed to 100 parts by weight of the crushed rice, and then allowed to stand for 40 minutes.

The rice was dried at a moisture content of about 15% by weight at a temperature of about 40 DEG C, and then pulverized to a size of about 200 mesh using a milling machine to produce a rice flour.

(Example 2)

Rice flour was prepared in the same manner as in Example 1 except that a penetrant was used instead of water for the second spray. That is, 10 parts by weight of the penetration liquid was sprayed to 100 parts by weight of the crushed rice.

The penetrant was obtained by mixing 50 parts by weight of the mixed extract with respect to 100 parts by weight of water, and the mixed extract was obtained by mixing the extract of Hwangchil-myeon and the extract of Yeoju at a weight ratio of 1: 0.5.

The extract was obtained by adding 10 times by weight of water to leaves of Hwangchujang and then sifting it at 90 캜 for 6 hours. The extract of Yeoju was prepared by adding water 10 times as much as water to Yeoju berries and then extracting it at 90 ℃ for 6 hours.

<Antioxidant activity test>

The antioxidant activity of the rice flour of Examples 1 and 2 was tested. The rice flour was poured into water, filtered through a microfiltration filter and filter paper to remove solid matter, concentrated to 50 mL, diluted with distilled water to a concentration of 1000 ppm.

The antioxidant activity (EDA%) of the samples was determined by modifying the Blois method. 0.5 mL of 0.2 mM DPPH (1,1-diphenyl-2-picryl hydrazyl) was placed in 2 mL of the sample, stirred, left for 30 minutes, and then absorbed at 517 nm. The radical scavenging activity was expressed by the absorbance reduction rate of the sample with and without additives. The radical scavenging activity was calculated by the following equation.

Radical scavenging activity (%) = (1-absorbance of sample added / absorbance of non-added sample) × 100

The results of measuring the radical scavenging activity of the samples are shown in Table 1 below.

division Radical scavenging performance (%) Example 1 32.8 ± 0.6 Example 2 56.3 ± 0.35

From the above experimental results, it was confirmed that the radical scavenging performance of Example 2 was much higher than that of Example 1. It is presumed that this is due to the excellent antioxidant activity of the mixed extract. Therefore, the rice flour of the present invention is excellent in antioxidant activity, thereby preventing corruption and rancidity, thereby enhancing long-term preservability. It is also possible to inhibit aging and prevent various diseases when rice cake, bread, And it is expected to be useful for health.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

Claims (4)

A foreign matter removing step of removing foreign matter by applying wind to the rice;
A spraying step of spraying water on the rice to absorb water in the rice;
A drying step of drying the rice to a water content of 10 to 20% by weight after the spraying step;
And a milling step of pulverizing the rice dried in the drying step to a size of 100 to 300 mesh,
Wherein the spraying step comprises: a) a first spraying step of spraying 2 to 20 parts by weight of water with respect to 100 parts by weight of the rice from which foreign substances have been removed in the step of removing foreign matters, thereby wetting the surface of the rice with water; b) A first infiltration step of allowing the rice to remain on the surface of the rice for 10 to 60 minutes after the spraying step, and c) a crushing step of crushing the rice to a size of 10 to 100 mesh after the first infiltration step; d) a second spraying step in which 5 to 15 parts by weight of the penetrant is secondly sprayed to 100 parts by weight of the crushed rice pieces in the crushing step, e) the rice flakes after the second spraying step for 10 to 60 minutes And a second infiltration step of infiltrating the penetration liquid to the inside of the piece of rice,
In the second spraying step, the permeate is obtained by mixing 50 parts by weight of the mixed extract with 100 parts by weight of water,
The mixed extract solution was prepared by mixing the extract of Wuchulchiai japonica with the extract of Yeoju at a weight ratio of 1: 0.5,
The extract was prepared by adding 10 times by weight of water to the leaves of Hwigulchilmum and then sifting the mixture at 90 ° C for 6 hours. For 6 hours, and then sieved to obtain a rice flour. delete delete The method of claim 1, further comprising mixing the rice flour with at least one selected from a woodchuck powder and a rice flour after the completion of the milling step.