Chemical composition of oil droplets from palm oil mill sludge. - (:unkn) unknown (My University)
Oil droplets from the centrifuge sludge of a palm Gil mill were separated by high speed centrifugation, dried and extracted with organic solvents, methanol and chloroform. The Gil droplets (73 wt per cent) was solvent extractable. The extract was determined to consist of 84 wt per cent neutral lipids and 14 wt per cent of complex lipids (6 wt per cent glycolipids and 10 wt per cent phospholipids). The neutral lipids consisted of 83 per cent triglycerides, 8 per cent diglycerides, 0.5 per cent monoglycerides and 8.0 pr cent free fatty acids. Five types of glycolipids were determined and identified as digalactosyl diglycerides (22 per cent), steryl glycosides (17 per cent), cerebroside (9 per cent), monogalactosyl diglycerides (20 per cent) and esterified steryl glycoside (26 per cent). Five types of phospholipids were determined and identified. They were phosphatidylethanolamine (21 pr cent), phosphatidylglycerol (37 per cent), phosphatidylcholine (17 per cent) and phosphatidylserine together with phosphatidylinositol at 11 per cent. Palmitic acid (C16:0) and oleic acid (C18:1) were the major fatty acids found in the lipids. The oil droplets found in the sludge were not unruptured oil droplets inherent in ripe mesocarp or young palm fruits. From the chemical analysis of the lipids associated with the oil droplets, it was deduced that oil droplets from the sludge are indeed formed in the milling process and possibly stabilized by the surface active agents of mainly phospholipids and glycolipids. The relatively high concentration of such biosurfactant in the oil droplets may have commercial potential as a value-added resource from the palm oil milling process.
18 ref.
Oil droplets from the centrifuge sludge of a palm Gil mill were separated by high speed centrifugation, dried and extracted with organic solvents, methanol and chloroform. The Gil droplets (73 wt per cent) was solvent extractable. The extract was determined to consist of 84 wt per cent neutral lipids and 14 wt per cent of complex lipids (6 wt per cent glycolipids and 10 wt per cent phospholipids). The neutral lipids consisted of 83 per cent triglycerides, 8 per cent diglycerides, 0.5 per cent monoglycerides and 8.0 pr cent free fatty acids. Five types of glycolipids were determined and identified as digalactosyl diglycerides (22 per cent), steryl glycosides (17 per cent), cerebroside (9 per cent), monogalactosyl diglycerides (20 per cent) and esterified steryl glycoside (26 per cent). Five types of phospholipids were determined and identified. They were phosphatidylethanolamine (21 pr cent), phosphatidylglycerol (37 per cent), phosphatidylcholine (17 per cent) and phosphatidylserine together with phosphatidylinositol at 11 per cent. Palmitic acid (C16:0) and oleic acid (C18:1) were the major fatty acids found in the lipids. The oil droplets found in the sludge were not unruptured oil droplets inherent in ripe mesocarp or young palm fruits. From the chemical analysis of the lipids associated with the oil droplets, it was deduced that oil droplets from the sludge are indeed formed in the milling process and possibly stabilized by the surface active agents of mainly phospholipids and glycolipids. The relatively high concentration of such biosurfactant in the oil droplets may have commercial potential as a value-added resource from the palm oil milling process.
Keywords: Aceite de palma; Ácidos grasos.; Composición quimica.; lodos; Plantas de beneficio; Triglicéridos.