Stabilization and Enzymatic Treatment of Rice Bran to Improve Oil Yield (original) (raw)
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Enzymatic Deacidification of Rice Bran Oil Containing High Free Fatty Acids with Recycling
2014
The enzymatic deacidification process for high free fatty acid (FFA) rice bran oils (RBO) has been investigated with special emphasis on the reusing of the enzyme. This process involves the suitability of the process as a viable alternative to the physical refining based on yield and quality of the refined RBO. Two samples of RBO, I and II containing different amounts of FFA and other constituents have been studied for this purpose by using two enzymes, non specific Novozyme 435 (Candida antarctica) and specific TL-IM (Immobilized lipase from Thermomyces lanuginosus). Studies showed that Novozyme 435 is more effective for the reduction of FFA using 40% excess of stoichiometric amount of glycerol. So, further study has been conducted for recycling with Novozyme 435 enzyme in case of sample II. This enzyme has been recycled 60 times and it has been observed that the enzyme is still active. The bioesterified oil containing 3-4% residual FFA is then steam stripped to reduce its FFA cont...
Rice bran oil is a vegetable oil that has specific characteristics and has health benefits. The rice bran oil phytochemical components such as tocopherols, tocotrienols, squalene, phytosterols, polyphenols, and γ-oryzanol. There are component rarely found in other vegetable oils. Rice bran oil has good oxidation stability which is very beneficial in deep-frying pans. This review aims to determine characteristics of rice bran oil such ass physicochemical properties, the extractions and purifications, and its application in food products. Rice bran oil has health benefits and quality, namely antioxidant, anti-cancer, and cardiovascular disease. Rice bran oils can be used for spreadable bran oil, margarine and various food products.
International Journal of Scientific & Technology Research, 2017
Rice bran oil (RBO) has been extracted from Celebes rice bran by multistage extraction with hexane solvent followed by ethanol to see the component, profile of fatty acids and mineral contained in both of them. As a comparison, RBO directly extracted with ethanol was also presented. Extraction process was performed using reflux method at 55 o C, for 5 hours with bran and solvent ratio of 1:7. Analysis of components and fatty acids of RBO was conducted with GC-MS QP 2010 Shimadzu. Oleic, linoleic and palmitic were found dominant in first stage extraction by hexane with concentration of 3716.56, 1630.78 and 1021.89 mg/L, respectively. Palmitic (6.34 mg/L), lauric (4.78 mg/L), and linoleic (3.52 mg/L) were dominant in the second stage extraction by ethanol. Linoleic (28.85 mg/L), stearic (2.88 mg/L) and myristic (2.02 mg/L) were found in extracted directly by ethanol. RBO extracted with hexane had 18.6% of saturated fatty acid and 81.4% of unsaturated fatty acids, with ratio of saturat...
Study on the Preparation Process of Rice Bran Oil by the Ultrasonic Enzymatic Extraction
The influence of oil rate and quality of rice bran oil by enzymatic extraction ultrasonic assisted were studied through designed experiment. The optimum enzymatic hydrolysis conditions were determined by the way of the orthogonal test. The results showed: after lipase enzyme in the rice bran (40 mesh sieve) was killed by the hot steam, the solution compounding material liquid ratio was 1:5 (W/V), 60°C, power and time of ultrasonic treatment were 120 W and 55 min, cellulose 1.2%, protease 0.6% and amylase 0.3%, pH 4.5, temperature 55°C, enzyme hydrolysis 5.5 h, the oil rate would reach to 92.63%.