Optimization of sardine (Sardinella sp.) Oil refining using response surface method (RSM)

RSM (Response Surface Method) is a set of mathematical techniques and statistics that are useful to analyze the problems so that the level of response was influenced by several variables. This research aimed to determine the optimal treatment of sardine (Sardinella sp.) oil refining through centrifugation and adsorption. Based on the results, it can be concluded that the optimum treatment was centrifugation at 9494.89 rpm for 31.48 minutes with addition of combined adsorbents attapulgite and bentonite (1:1) 3%. The optimum point resulted a peroxide value at 2.97 meq/Kg, p-anisidine value at 0.81 meq/Kg, totox value at 6.32 meq/kg, and free fatty acid at 4.07%.