Acceleration of biodiesel-glycerol decantation through NaCl-assisted gravitational settling: A strategy to economize biodiesel production

► An efficient pre-treatment step for glycerol separation from biodiesel has been developed. ► Addition of 1 g NaCl/100 ml glycerol-biodiesel mixture accelerated decantation process by 100%. ► NaCl-assisted gravitational settling as a strategy for economizing biodiesel production.