A rice production method for separating bran germ and the rice germ and aleurone prepared therefrom

Abstract

The invention relates to a method for producing rice by separating bran germs and the prepared rice germ and aleurone, which belong to the technical field of rice deep processing. The invention involves the following steps: 1) the method of not washing the rice to grind the seed coat where the lipolytic enzyme is located to obtain the rice bran; 2) the low-temperature freezing method of the rice bran combined with the microwave drying method can extract a small part of the rice germ; 3) not washing the rice and continuing to grind Obtaining clean rice meal; 4) air-selecting first, and then screening the rice meal to separate rice germ and aleurone; 5) cleaning and packaging finished products after low-temperature drying and sterilization. The invention has the advantages of higher yield of whole grains of rice germ, higher purity of aleurone layer, better preservation of their original nutrition, more hygienic and safe consumption, acid value less than 3mgKOH / g oil within one year shelf life, bacteria The total amount is less than 100CFU / g, aflatoxin B1≤1μg / kg, ochratoxin A≤0.5μg / kg, purity can reach more than 80%, and various health and safety indicators meet the national food standards, which is conducive to marketing and promotion.

Description

Technical field [0001] A rice-making method for the separation of bran embryos and the rice germ and paste layer powder produced by it belong to the field of rice deep processing technology. Background [0002] Rice is the staple food of human beings, is the main source of nutrition for the basic energy and nutritional needs of the human body, China's rice production and consumption ranked first in the world, the total output in 2013 reached more than 200 million tons, accounting for about 33% of the global total, the country's 800 million people to rice as the main food, Each year due to the direct consumption of rice and its products and consume about 190 million tons of rice, rice embryo content rate of 2-3.5%, ambiguous powder layer rate of 4-6%, at present it has been mixed with rice bran, a small amount for the preparation of rice bran oil, most of which is used for feed raw materials, so every year China will have more than 3.8 million tons of rice germ and more than 7.6 ...

AI Technical Summary

Problems solved by technology

[0004] The aleurone layer of rice is the outermost layer of the endosperm tissue. It is composed of neatly arranged nearly square thick-walled cells. There are 1-5 layers of cells, which are closely combined with the endosperm and are differentiated from the endosperm. The cells are rich in Trace elements such as protein, fat, vitamins and minerals, the amount of aleurone layer is related to the position of the grain, the variety of rice and environmental factors. The cells of the aleurone layer are relatively large, and the cell cavity is filled with tiny granular substances called Aleurone grains, the layer of cells next to the aleurone cells is called the sub-aleurone layer, its nature is between the aleurone cells and the internal starch cells, its shape is slightly similar to the aleurone cells, and it contains more protein, fat, etc. , also store a small amount of starch grains, so far, there are few researches and developments on the direct consumption of rice aleurone layer