Application of enzyme in aqueous extraction of sesame oil

Abstract

The oil recovery of the traditional process of extracting sesame oil by aqueous method could be improved by adding enzyme. Sesame oil was extracted under aqueous extraction conditions using three kinds of enzymes, which were papain, trypsin and cellulase. The optimal conditions were pH 7.0, 50 °C and extraction time 3 h with constant shaking at 80 rpm. The enzyme dosage and the enzyme proportion were researched by orthogonal experiment. The result indicated that the enzymes significantly improved the oil recovery. When the enzyme hydrolysis was performed with complex enzyme of papain 6,000 U, trypsin 400 U and cellulase 250 U/g oilseed, higher oil recovery (87.58 %) was achieved than the traditional aqueous extraction processing, and the oil was extremely fragrant. Moreover, the clear oil could fall directly from the centrifuge tube which greatly reduced the difficulty of separating oil.