NOVELTY - Making fatty acid esters from glyceride containing feed having free fatty acid and phosphorus-containing species involves transesterifying pretreated glyceride feed with lower alkanol in presence of base catalyst to form menstruum comprising oil phase (P2) of fatty acid ester and glycerin phase (P2) of the unreacted alkanol and catalyst; separating phases and contacting phase (P2) with glyceride containing feed to provide menstruum of pretreatment oil phase containing glycerides and pretreatment glycerin phase and to provide fatty acid ester.    USE - For making fatty acid esters from glyceride-containing feed having free fatty acid and phosphorus containing species (claimed) useful for manufacture of biodiesel fuels.    ADVANTAGE - The process reduces the variable costs in making biodiesel, such as reduces the amounts of lower alkanol and base catalyst required per unit of biodiesel production; and also reduces the energy consumption per unit of biodiesel produced. The process also removes undesirable components from glyceride-containing feed, such as free fatty acids and phospholipids. The presence of fatty acid ester and mono and diglycerides in the pretreated feed increases the solubility of the lower alkanol in the oil phase to enhance the amount of alkanol that is recovered from the co-product glycerin; and does not require the pretreated feed to undergo any incubation period for transesterification, consequently plug flow transesterification reactors become a more attractive option. The process provides increased production and higher conversion.    DETAILED DESCRIPTION - Making fatty acid esters from glyceride containing feed containing free fatty acid and phosphorus containing species involves:    (A) transesterifying pretreated glyceride feed with lower alkanol under conditions in presence of base catalyst to provide transesterification menstruum comprising transesterification oil phase (P2) containing fatty acid ester and transesterification glycerin phase (P2) containing unreacted lower alkanol and the catalyst;    (B) phase separating the phases (P1) and (P2) from menstruum;    (C) contacting at least a portion of the phase (P2) with glyceride containing feed to provide menstruum comprising pretreatment oil phase containing glycerides and pretreatment glycerin phase, where contacting is for time and at temperature in presence of the catalyst to react alkanol (at least 20 mass%) with glycerides to provide fatty acid esters, convert free fatty acids to soaps and convert phosphorus-containing species to phosphorus compounds soluble in glycerin; and    (D) phase separating the menstruum to provide pretreated glyceride feed containing glyceride and lower alkanol and having reduced concentrations of free fatty acids and phosphorus-containing species, and spent glycerin-containing phase containing soaps and phosphorus compounds and having reduced concentration of alkanol.    An INDEPENDENT CLAIM is included for producer composition comprising (mass%): triglyceride (20-70), total mono and di-glycerides (10-25), fatty ester of lower alkanol (20-50), lower alkanol (0.5-5), free fatty acid (less than 0.1), water (less than 0.1) and phosphorus compound (less than 30 parts per million (ppm)).