Effect of cold milling for recovery of omega-3 fatty acid rich flaxseed oil from hydraulic press

Flaxseed is regaining its popularity from its traditional usage as a raw material in oil production because of the reported health benefits of omega-3 fatty acids. The aim of the present investigation was to develop cold milling extraction process to get omega-3 fatty acid rich oil form flaxseed. The experiments for optimization of flaxseed oil extraction for obtaining omega-3 fatty acids rich oil were conducted as per the experimental design CCD by using hydraulic press. The effect of pretreatments feed moisture (4, 6 and 14 %), microwave power (450, 650 and 900 W) and microwave time (2, 6, 10 min). The most effective parameters for extraction of oil from hydraulic press were moisture 14 %, microwave power 600 W and microwave time 10 min where in the oil yield was 20.10 %, omega-3 fatty acid was 52.67 % and oil temperature was 29.35 %.