Model development to enhance the solvent extraction of rice bran oil

Abstract

Rice bran oil (RBO) extraction with ethanol using maceration method accompanied by stirring has been optimized using response surface methodology (RSM) based on central composite design (CCD). Experiments were conducted to investigate the influence of extraction time, ethanol concentration, and ethanol volume on the oil yield, g-oryzanol, and vitamin E of RBO as the response. The experiment consisted of twenty units including six replicates of the center points. The data were analyzed using Design-Expert 10 software to develop and evaluate models and to plot the response curve as 3D surfaces. The result showed that the maximum of the oil yield, g-oryzanol, and vitamin E of RBO was achieved under the optimum conditions of x 1 = 5.30 h, x 2 = 89.21% and x 3 = 686.66 mL (50 g rice bran), respectively. Maximum of the response under these conditions was 14.47%, 783.65 mg.L À1 , and 127.01 mg.L À1 , respectively. This study has resulted in the development of a model for RBO extraction using ethanol as solvent, it is feasible to be applied to the RBO industry with an efficient process, as well as an implementation of the "green" solvent concept.

Extraction of Flavonoid Content from Banana Peel (Musa Paradisiaca L.) by Ultrasound – Assisted Extraction Method and Its SPF Value

“…The amount of solvent volume will also affect the contact area between the material and the solvent. The more amount of solvent led to wider contact area and the distribution of the solvent [9]. Even distribution of solvent can increase yield and the amount of solvent will reduce the level of saturation of the solvent so that the components will be extracted perfectly [9].…”

“…The more amount of solvent led to wider contact area and the distribution of the solvent [9]. Even distribution of solvent can increase yield and the amount of solvent will reduce the level of saturation of the solvent so that the components will be extracted perfectly [9]. In addition, an increasing number of solvents will also increase the ability of the solvent to extract and increase the contact time that lasts between the material and the solvent [9].…”

“…Even distribution of solvent can increase yield and the amount of solvent will reduce the level of saturation of the solvent so that the components will be extracted perfectly [9]. In addition, an increasing number of solvents will also increase the ability of the solvent to extract and increase the contact time that lasts between the material and the solvent [9]. Since the UAE uses cavitation principle for mass transfer, an increase in total volume led to higher extraction efficiency [10].…”