Title : Separation of saturated fatty acids from docosahexaenoic acid-rich algal oil by enzymatic ethanolysis in tandem with molecular distillation - He_2020_Food.Sci.Nutr_8_2234 |
Author(s) : He J , Hong B , Lu R , Zhang R , Fang H , Huang W , Bai K , Sun J |
Ref : Food Sci Nutr , 8 :2234 , 2020 |
Abstract :
Algal oil, rich in docosahexaenoic acid (DHA) and an environmentally sustainable source of omega-3 fatty acids, is receiving increasing attention. In the present study, a novel approach combining ethanolysis with a 1,3-specific immobilized lipase (Lipozyme() TL IM) and molecular distillation was investigated to increase the DHA content of algal oil. Algal oil with a 45.94% DHA content was mixed with ethanol, pumped into a column filled with Lipozyme() TL IM, and then circulated for 4 hr at room temperature. The ethanol was then recycled by vacuum distillation. At an evaporator temperature of 150 degC, the residue was separated by molecular distillation into a heavy component enriched with DHA glycerides (in the form of triglyceride (TG), diglyceride (DG), and monoglyceride (MG)) and a light component enriched with palmitic acid (PA) and DHA ethyl ester (EE). As a result, 76.55% of the DHA from the algal oil was present in the heavy component, whose DHA content was 70.27%. DHA-MG was collected in the heavy component mostly in the form of 1-MG. Lipozyme() TL IM appeared to specifically target PA rather than DHA at the sn-1(3) position. The Lipozyme() TL IM allowed 90.03% of the initial DHA yield to be retained after seven reaction cycles. Therefore, an eco-friendly and simple method for increasing the DHA content in algal oil has been developed. |
PubMedSearch : He_2020_Food.Sci.Nutr_8_2234 |
PubMedID: 32405380 |
He J, Hong B, Lu R, Zhang R, Fang H, Huang W, Bai K, Sun J (2020)
Separation of saturated fatty acids from docosahexaenoic acid-rich algal oil by enzymatic ethanolysis in tandem with molecular distillation
Food Sci Nutr
8 :2234
He J, Hong B, Lu R, Zhang R, Fang H, Huang W, Bai K, Sun J (2020)
Food Sci Nutr
8 :2234