稻米油精炼技术

Refining technology of rice bran oil

稻米油因其丰富的营养成分越来越受到人们的青睐。米糠极易酸败造成稻米毛油酸价高、精炼难和得率低,制约了稻米油产业发展。高效去除稻米油中杂质的同时,最大程度保留谷维素、植物甾醇等营养成分,是稻米油精炼加工面临的困难和挑战。传统稻米油加工一般采用碱炼脱酸工艺,近年来稻米油超级脱胶物理精炼、酶法脱胶物理精炼等技术在实践中得到运用。对稻米油精炼的传统化学精炼工艺和现代物理精炼工艺进行了综述,以期为稻米油的精炼提供参考。

Rice bran oil attracts more and more attention due to its rich nutritional contents. Rice bran is prone to rancidity, resulting in high acid value, difficult refining and low yield of crude rice bran oil, which restricts the development of rice bran oil industry. How to remove the impurities in crude rice bran oil efficiently and meanwhile maximumly retain the nutrients such as oryzanol and phytosterol, were great challenges for rice bran oil refining. Deacidification processes with alkali refining are generally applied in traditional rice bran oil processing. In recent years, new technologies such as physical refining by super degumming and enzymatic degumming have been used for rice bran oil refining in practice. The traditional chemical process and modern physical process of rice bran oil refining technology were reviewed so as to provide reference for rice bran oil refining.