阅读说明：本技术 富硒胚芽米的制备方法 (Preparation method of selenium-rich germ rice ) 是由 张世平 于 2020-06-17 设计创作，主要内容包括：本发明提供一种富硒胚芽米的制备方法,涉及大米加工技术领域。一种富硒胚芽米的制备方法,所述富硒胚芽米的制备方法包括：糙米发芽处理后得到发芽糙米；发芽糙米在水蒸气中加热处理；水蒸气加热处理后,硒溶液雾化喷洒至发芽糙米的表面,在负压下静置；干燥后碾米得到富硒胚芽米。本发明对糙米进行发芽处理,提高出芽率,有利于提高胚芽米的生产效率。采用水蒸气处理,实现钝化处理,可以使吸水后的糙米表面皮层变得疏松。通过雾化喷撒使得硒溶液均匀覆盖在发芽糙米的表面,再在负压条件,促进硒溶液快速通过疏松的糙米表面进入米胚乳中,不需要采用长期硒溶液浸泡的方式,提高了胚芽米中的硒含量,也避免硒溶液浸泡带走米中的营养物质。(The invention provides a preparation method of selenium-rich germ-enriched rice, and relates to the technical field of rice processing. A preparation method of selenium-rich germinated rice comprises the following steps: germinating the brown rice to obtain germinated brown rice; heating germinated brown rice in water vapor; after the steam heating treatment, the selenium solution is atomized and sprayed to the surface of the germinated brown rice, and is kept stand under negative pressure; drying and milling to obtain the selenium-rich germ-enriched rice. The invention carries out germination treatment on the brown rice, improves the germination rate and is beneficial to improving the production efficiency of the germ rice. The water vapor treatment is adopted to realize passivation treatment, so that the surface cortex of the brown rice after water absorption becomes loose. The selenium solution is uniformly covered on the surface of the germinated brown rice by atomization spraying, and then the selenium solution is promoted to rapidly enter the rice endosperm through the surface of the loosened brown rice under the negative pressure condition, so that a long-term selenium solution soaking mode is not needed, the selenium content in the germinated rice is improved, and the situation that the nutrient substances in the rice are taken away by the selenium solution soaking is avoided.)

1. The preparation method of the selenium-rich germinated rice is characterized by comprising the following steps:

germinating the brown rice to obtain germinated brown rice;

heating germinated brown rice in water vapor;

after the steam heating treatment, the selenium solution is atomized and sprayed to the surface of the germinated brown rice, and is kept stand under negative pressure;

drying and milling to obtain the selenium-rich germ-enriched rice.

2. The method for preparing selenium-enriched germinated rice as claimed in claim 1, wherein the brown rice is soaked and then placed on a germination bed for germination, the temperature of the germination bed is 30-34 ℃, and the humidity is 85-95%.

3. The method for preparing selenium-enriched germ-enriched rice as claimed in claim 1, wherein the rice sprout length is 0.5-1.0 mm.

4. The method for preparing selenium-enriched germinated rice as claimed in claim 1, wherein the heating treatment time in water vapor is 120-160 s.

5. The method for preparing selenium-enriched germinated rice as claimed in claim 1, wherein the selenium solution is 0.08-0.1% by weight sodium selenite solution.

6. The method for preparing selenium-enriched germinated rice as claimed in claim 1, wherein the standing under negative pressure is performed, the atomized selenium solution is sprayed on the surface of the germinated brown rice, and then the standing under negative pressure is performed for 3-5 times.

7. The method for preparing selenium-enriched germinated rice according to claim 1, wherein the drying is performed by superheated steam.

8. The method for preparing the selenium-enriched germ-enriched rice according to claim 1, wherein the rice milling is performed by a rice mill, and the rice milling is multistage rice milling.

9. The method for preparing selenium-enriched germinated rice as claimed in claim 1, wherein spraying selenium solution to the surface of germinated brown rice by atomization between every two times of rice milling, standing under negative pressure, standing and drying.

10. Selenium-enriched germinated rice prepared by the method for preparing selenium-enriched germinated rice according to any one of claims 1-9.

Technical Field

The invention relates to the technical field of rice processing, in particular to a preparation method of selenium-rich germ-enriched rice.

Background

The germ rice is rice with germ part of rice retained, and other parts are the same as rice with white rice. In fact, the most important center of the rice is the germ. The germinated brown rice is a rice product processed from germinated brown rice, is easy to digest and absorb, has small loss of nutrient components, is rich in nutrient components such as gamma-aminobutyric acid and ferulic acid which have the effects of reducing blood pressure and stabilizing spirit, and is a functional food with strengthening significance.

However, the existing milled rice with germ is produced by milling rice with a germ machine, the germ retaining rate of different milled rice with germ machines is different, generally about 60-70%, and the milled rice with germ of the second milled rice with germ machine is little or even no germ. The existing germ rice has high processing difficulty and high requirement.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a preparation method of selenium-rich germ-enriched rice, which solves at least one technical problem provided by the background technology.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

a preparation method of selenium-rich germinated rice comprises the following steps:

germinating the brown rice to obtain germinated brown rice;

heating germinated brown rice in water vapor;

after the steam heating treatment, the selenium solution is atomized and sprayed to the surface of the germinated brown rice, and is kept stand under negative pressure;

drying and milling to obtain the selenium-rich germ-enriched rice.

Preferentially, the brown rice is soaked and then placed on a germination bed for germination, wherein the temperature of the germination bed is 30-34 ℃, and the humidity is 85% -95%.

Preferably, the rice sprout length is 0.5-1.0 mm.

Preferably, the heating treatment time in the water vapor is 120-160 s.

Preferably, the selenium solution is sodium selenite solution with the weight percentage concentration of 0.08-0.1%.

Preferably, after standing under negative pressure, atomizing and spraying the selenium solution on the surface of the germinated brown rice, and then standing under negative pressure for 3-5 times.

Preferably, the drying is hot air drying.

Preferentially, the rice milling is performed by a rice mill, and the rice milling is multistage rice milling.

Preferably, the selenium solution is sprayed to the surface of the germinated brown rice by atomization between every two times of rice milling, and the germinated brown rice is kept stand under negative pressure and dried after being kept stand.

Also provides selenium-rich germ-enriched rice prepared by the preparation method of the selenium-rich germ-enriched rice.

(III) advantageous effects

The invention provides a preparation method of selenium-rich germ rice. Compared with the prior art, the method has the following beneficial effects:

the invention carries out germination treatment on the brown rice, improves the germination rate and is beneficial to improving the production efficiency of the germ rice. Meanwhile, the germinated brown rice is subjected to steam treatment, so that passivation treatment is realized on one hand, the surface cortex of the brown rice after water absorption can be loosened through steam heating treatment on the other hand, the selenium solution is atomized and sprayed on the surface, the brown rice is kept stand under negative pressure, the selenium solution is uniformly covered on the surface of the germinated brown rice through atomization and spraying, and then the selenium solution is promoted to rapidly enter the rice endosperm through the loosened brown rice surface under the negative pressure condition, a long-term selenium solution soaking mode is not needed, the selenium content in the germinated rice is improved, and the situation that nutrient substances in the rice are taken away by the selenium solution in a soaking mode is avoided.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A preparation method of selenium-rich germinated rice comprises the following steps:

germinating the brown rice to obtain germinated brown rice;

heating germinated brown rice in water vapor;

after the steam heating treatment, the selenium solution is atomized and sprayed to the surface of the germinated brown rice, and is kept stand under negative pressure;

drying and milling to obtain the selenium-rich germ-enriched rice.

The invention carries out germination treatment on the brown rice, improves the germination rate and is beneficial to improving the production efficiency of the germ rice. Meanwhile, the germinated brown rice is subjected to steam treatment, so that passivation treatment is realized on one hand, the surface cortex of the brown rice after water absorption can be loosened through steam heating treatment on the other hand, the selenium solution is atomized and sprayed on the surface, the brown rice is kept stand under negative pressure, the selenium solution is uniformly covered on the surface of the germinated brown rice through atomization and spraying, and then the selenium solution is promoted to rapidly enter the rice endosperm through the loosened brown rice surface under the negative pressure condition, a long-term selenium solution soaking mode is not needed, the selenium content in the germinated rice is improved, and the situation that nutrient substances in the rice are taken away by the selenium solution in a soaking mode is avoided.

In one embodiment, the brown rice is soaked and then placed on a germination bed for germination, wherein the temperature of the germination bed is 30-34 ℃, and the humidity is 85% -95%. The germination is promoted and the germination efficiency is improved by controlling the temperature and the humidity.

In one embodiment, the rice sprout length is 0.5-1.0 mm.

In one embodiment, the heating treatment time in the water vapor is 120 to 160 seconds. By reasonably controlling the heat treatment time of the water vapor, the specific temperature of the water vapor can be 110-120 ℃, and the inactivation of the nutrient components in the brown rice caused by overhigh temperature due to overlong heating time is avoided.

In one embodiment, the selenium solution is 0.08-0.1% by weight sodium selenite solution.

In one embodiment, the germinated brown rice is kept still under the negative pressure, atomized and sprayed with a selenium solution, and kept still under the negative pressure for 3-5 times. By combining atomization spraying with negative pressure standing and continuous circulating treatment, the selenium enrichment rate is improved, and the selenium content in the germ rice is increased.

In one embodiment, the drying conditions of the superheated steam treatment are as follows: the temperature is 150-160 ℃; the time is 25-40 seconds, so that the water content of the material is 11-13 wt%.

In one embodiment, the rice milling is performed by a rice milling machine, and the rice milling is multistage rice milling.

In one embodiment, selenium solution is sprayed to the surface of the germinated brown rice by atomization between every two times of rice milling, and the germinated brown rice is kept stand under negative pressure and dried after being kept stand. In the embodiment of the invention, the specific rice milling process comprises the following steps: and after drying, carrying out first rice milling, spraying a selenium solution to the surface of the germinated brown rice through atomization after the first rice milling is finished, standing under negative pressure, drying after standing, then carrying out second rice milling, spraying the selenium solution to the surface of the germinated brown rice through atomization after the second rice milling is finished, standing under negative pressure, and drying after standing. So recycling repeatedly, until reaching the target product, the probability that garrulous rice appears has been reduced through multistage husk rice, spray selenium solution to the surface of the brown rice that sprouts through atomizing between every twice husk rice simultaneously, it can improve the selenium-enriched rate to stand under the negative pressure on the one hand, on the other hand atomizes and sprays selenium solution to the surface of the brown rice that sprouts, make brown rice surface cortex expansion that absorbs water, superheated steam heating makes the brown rice surface cortex after absorbing water become loose, then the drying then has the contraction action, so one contracts, help reducing the adhesion of cortex and rice grain, the desorption cortex, the white that makes the rice grain become, promote the husk rice.

Also provides selenium-rich germ-enriched rice prepared by the preparation method of the selenium-rich germ-enriched rice.

The following is a detailed description of the embodiments: