Germ rice first appeared in Japan. The requirement for germ rice in Japan is that the embryo retention rate is more than 80%, and the weight of embryo in every 100g of rice is more than 2G. The determination is based on the intact rate of rice embryo. In Japan, South Korea and Taiwan, germ rice has been served to thousands of families.

Japan is also the latest country to develop the germ rice machine. The rub off type germ rice milling machine and its auxiliary equipment are widely used in the processing of germ rice in Japan, such as the rough rice separator, the rub rice machine, the germ rice grading and the color sorter. The plumule rice grading device can store the plumule rice in different bins according to the grain size, and then mix it according to the user's requirements before measuring and packaging.

The following is the production process of a rice mill production line https://www.shellermachine.com/rice-mill-production-line in Japan that processes 5T germ rice per day:
Receiving hopper → cleaning → brown rice box → stone remover → magnetic separator → metering device → grain brown separator → brown rice classifier → germ rice grinder → rice storage machine → germ rice classifier → rice storage bin → rice mixing device → color separator → finished product bin → metering packaging

The process and some of the equipment listed are selected based on the traditional Japanese rice processing method, which uses brown rice as raw material.

China also has the production of germ rice, but it is understood that the production of germ rice in China still needs to go through three major processes: cleaning, hulling and milling. In order to keep the embryo retention rate above 80%, multi machine light milling must be adopted during rice milling, that is, the number of milling passes should be more and the pressure inside the rice milling machine should be low. This requires high requirements for the rice mill. The rice mill used should be a sand roller rice mill. The sand grains of the emery roller should be relatively fine. The two ends of the rice grains are not easy to be milled off during whitening, and the embryo is easy to be retained. The rotation speed of the sand roller rice mill should not be too high, otherwise the embryo is easy to fall off. The rotation speed should be changed from high to low according to the different stages of whitening. The rice milling machine is equipped with single machine cycle and multi machine continuous type. The single machine circulation type is that a rice machine https://www.shellermachine.com/combine-rice-mill-machine is equipped with a circulation hopper, and the rice grains are milled for 6-8 times to obtain the germ rice. This processing method is inefficient, but it covers a small area and requires less equipment investment. The multi machine continuous type is to connect 6-8 rice machines in parallel and in series, so that the rice grains are milled by each rice machine in order to obtain the germ rice. This processing method is suitable for large-scale production, but it covers a large area and requires high investment.

Consumers' understanding of germ rice and germ rice enterprises in the market

Due to the complex production process of germ rice, the rice germ is not strongly adhered to the endosperm, so it is difficult to completely remove the outer skin to make the rice white and preserve it in the germ. Therefore, most of the "germ rice" are connected to the outer skin. In addition, the quality guarantee period of germ rice is very short, and it is generally eaten within half a month after milling to avoid nutrient loss or deterioration. Therefore, it can not be mass produced, packaged and stored like existing ordinary rice.

Therefore, there are few germ rice in circulation in the market, and consumers' understanding of the germ rice is not clear enough. They feel bad about the germ rice with bad "long-term thinking", ignoring the nutritional role of the germ rice, or treating the germ rice as coarse grain brown rice, thinking that its taste is not good. However, with the promotion of germ rice by some businesses and the introduction of products, consumers' understanding of germ rice has gradually deepened.