The current work aimed at improving knowledge on the behavior of ultrafiltration with ceramic membranes in separating
glycerol from biodiesel using different feedstock.To this end,it was evaluated the influence of oil quality on ultrafiltration of the reaction mixture produced after ethyl esterification of vegetable oils with different characteristics.The separation of glycerol was performed using ultrafiltration membranes,and the best operating condition was evaluated in terms of permeate flux and quality of the product.