Effect of enzymatic treatment on rapeseed oil degumming and its quality

摘要

An experiment of rapeseed oil degumming by a phospholipase A1 (Lecitase(R) Ultra) had been carried out for the study of effect of enzymatic treatment on the rapeseed oil degumming and its quality. The experimental results show that the Lecitase(R)Ultra plays an important role in the degumming of rapeseed oil. By doing orthogonal experiment, the optimum conditions of rapeseed oil degumming by a phospholipase A1 were obtained as follows: pH 4.82, dosage of Lecitase(R) Ultra 150LU/kg,temperature 37°C and time of enzymatic treatment 3h. Under these conditions, the phosphorus content in obtained degummed rapeseed oil was 6.97mg/kg. At the same time, the acid value and peroxide value of the degummed oil increased, and its color had a beneficial change. In the degummed rapeseed oil, the contents of palmitic acid and oleic acid decreased, but the contents of linolenic acid, linoleic acid, eicosenoic acid and erucic acid increased, and the content of other fatty acids didn't evidently change.