Effect of Multi-Frequency Ultrasound Assisted Enzymatic Treatment on the Degumming Efficiency and Quality Attributes of Rapeseed Oil

Abstract:

The effect of multi-frequency ultrasound assisted enzymatic（phospholipase A1） treatment on the degumming efficiency and quality of rapeseed oil was investigated in this study. The results showed that multi-frequency ultrasonic treatment can effectively improve the degumming efficiency of rapeseed oil and also reduce the ultimate phosphorus content in the rapeseed oil. In addition，the 20/50 kHz dual-frequency ultrasonic treatment had the best degumming efficiency of rapeseed oil. Compared with the rapeseed oil after degumming by phospholipase A1，the acid value and peroxide value of degummed rapeseed oil after ultrasonic treatment increased slightly，but they were all within the safe range stipulated by the national standard. Moreover，the color of degummed oil became lighter，and the change in the value of fatty acid composition was not obvious.