Rice bran is the main by-product of rice processing, but its nutritional content accounts for almost 60% of the nutritional value of rice, and can be used for feed processing and edible oil processing. Rice bran has a low oil content and high powder content. The use of rice bran oil pressing technology does not have a great advantage in oil yield and production efficiency. Most rice bran oil mills will choose the extraction process to fully extract oil, and the residual oil in the cake can be controlled within 1%. Before rice bran oil extraction, in order to improve the quality of rice bran oil, the rice bran raw material will be stabilized.
High temperature will inactivate the lipase in rice bran, which is the basic principle of processing and stabilizing rice bran. At present, in the production of rice bran oil, the rice bran extrusion process is mostly used to stabilize rice bran. During the extrusion process, the rice bran moves forward under the push of the screw and spiral. As the pressure inside the machine cavity gradually increases and the temperature continues to rise, under the conditions of high temperature and high pressure, the starch is gelatinized and cracked, the protein is denatured and reorganized, the fiber is partially degraded and refined, and the lipase in rice bran is dissolved.
Rice bran expansion can play the following roles:
Improve the extraction effect: the puffed rice bran is transformed from powder to porous columnar structure, which is convenient for solvent immersion, thereby reducing the consumption of solvent during extraction and increasing the oil yield of the rice bran oil mill.
Improve the extraction quality: the expanded process inactivates enzymes such as lipoxygenase and phospholipase in rice bran, reduces the content of non-hydratable phospholipids in the extracted crude oil, and increases the rice bran oil refining yield. At the same time, the yield of concentrated phospholipids produced by hydrating the crude oil obtained by puffing is increased, and the lecithin content in the phospholipids is increased.
Improve production efficiency: the bulk density of puffed rice bran particles increases, the cell tissue is destroyed, the interior has more porosity, the surface has more free oil, the particle size and mechanical strength increase, which increases the extraction rate, shortens the extraction time, and increases the output by 30%-50%. Stabilizing rice bran has a great influence on the quality and nutrition of rice bran oil. It can not only reduce the speed of rice bran rancidity, but also reduce the loss in subsequent production and increase the oil yield. The puffing process is a commonly used pretreatment process in rice bran oil processing. It can not only stabilize the quality of rice bran, but also change the structure of rice bran, making it a granular oil with good permeability, which is more conducive to extraction and degreasing.
All in all, to consult and purchase rice bran oil processing machine, you can go to Henan Huatai Cereals and Oils Machinery Co., Ltd. We will send you the complete fetures and specifications of the equipment. Please contact us for the price of Rice Bran Oil Processing Equipment. Welcome to visit our factory and for latest quotation.
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