Cold pressing uses mechanical screw press with mild heating followed by filtration to get clean RBO. Pre-treatment of rice bran with low temperature before cold pressing can produce RBO with superior quality ( Srikaeo and Pradit, 2011 ). A combination of short cooking time and cold pressing is more effective and efficient.
What is rice bran?
Rice bran is obtained from outer layer of the brown (husked) rice kernel during milling. It has emerged as potential by-product from rice processing industry due to the increasing demand for rice bran oil (RBO) as healthy functional food ingredients.
What is rice bran oil?
Rice bran oil (RBO) is unique among edible vegetable oils because of its unique fatty acid composition, phenolic compound (¦Ã-oryzanol, ferulic acid) and vitamin E (tocopherol and tocotrienol). It has become a great choice of cooking oil because of its very high burning point, neutral taste and delicate flavour.
Should rice bran be stabilized after production?
It is advised to stabilize rice bran or RBO immediately upon production. High FFA results in high refining loss, therefore, it is beneficial to have FFA level of less than 5% in the crude RBO, and exceeding amount of FFA (> 10%) is unfit for human consumption ( Orthoefer and Eastman, 2005 ).