A.O. Ameh, M.S. Olakunle, H.U. Shehu and T. Oyegoke
The effects of particle sizes and extraction time on the solvent extraction of oleoresin were studied to obtain data for process control and optimization. Extraction was carried out using ethanol as a solvent and at a constant temperature of 40oC. Ginger particle sizes considered were 1200, 850, 600, 425 and 250 microns at extraction times of 10, 20, 30, 40, 50, 60 and 70 minutes. Experimental data generated were fitted to an empirical model to determine the kinetic parameters. It was found that, for each particle size, the yield of oleoresin increased with increasing extraction time up to an optimum time after which the yield remained constant. Also, the optimum extraction was found to have increased with decreasing particle size. Furthermore, the maximum oleoresin yield was found to be dependent on particle size, viz-a-viz, smaller particle sizes favored greater yield. These results were reflected in the constants of the Patricelli equation (K and τ). Fitting the experimental data to the empirical model indicated a good fit as represented by the R2 values. The ginger extract was characterized using FTIR. Read full PDF
Keywords: Evaluation, Extraction, Ginger, Modeling, Oleoresin and Curve-fitting
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