Research of aqueous enzymatic extraction of watermelon seed Oil of ultrasonic pretreatment assisted

Abstract The use of ultrasound pretreated on the shelling of watermelon seed kernel, to enhance the oil extraction rate of watermelon seed by aqueous enzymatic. The optimal value The hydrolysis conditions were determined as follows:dosage of Protex2.63%,temperature47.13 °C,time4.29 h,ratio of stuff towater 1:4.35,pH 7.89. Under the optimal conditions, the oil extraction efficiency reached 77.25%. The results showed that watermelon seed oil extraction rate of primary and secondary order factors are: ultrasonic power> ultrasonic time> ultrasonic temperature.The ultrasound irradiation at 547W and 48°C for 23 s followed by aqueous enzymatic extraction could increase the oil extraction efficiency to 98.64% which was21.39% higher than that of non-irradiation with ultrasound.