NOVELTY - Removing impurities from crude biodiesel stream comprises washing crude biodiesel stream with water to remove portion(s) of glycerin to obtain alkyl ester stream with reduced glycerin and obtain spent water stream; concentrating spent water to obtain (a) aqueous fraction containing water and glycerin (less than 5 mass%) and (b) aqueous glycerin containing fraction; and recycling portion(s) of aqueous fraction to first step as a portion of water. The stream contains alkyl esters of fatty acids, lower alkanols (less than 5000 parts per million by mass (ppm-m)), and glycerin.    USE - The method is useful for removing impurities from crude biodiesel stream.    ADVANTAGE - The method generates minimum waste water from water washing of crude biodiesel while minimizing energy consumption, thus eliminating additional costs. The method does not require facilities in biodiesel plant to distill alkanol from spent glycerin by-product of transesterification. The method reduces concentration of lower alkanol in crude biodiesel to less than 5000 ppm-m prior to washing with water, thus water washing is not required to remove lower alkanol for biodiesel to be of merchantable quality. The method minimizes any potential volatile organic emissions. The method allows recycling of dry recovered alkanol without effecting additional water and alkanol fractionation.    DETAILED DESCRIPTION - Removing impurities from crude biodiesel stream comprises washing crude biodiesel stream with water to remove portion(s) of glycerin to obtain alkyl ester stream with reduced glycerin and obtain spent water stream; concentrating spent water to obtain (a) aqueous fraction containing water and glycerin (less than 5 mass%) and (b) aqueous glycerin containing fraction; and recycling portion(s) of aqueous fraction to first step as a portion of water. The stream contains alkyl esters of fatty acids, lower alkanols (less than 5000 ppm-m), and glycerin. The aqueous glycerin containing fraction includes glycerin ( greater than or equal to 10 mass %). INDEPENDENT CLAIMS are included for:    (1) making biodiesel comprising contacting glyceride-containing feed and lower alkanol under transesterification conditions for a time to convert greater than or equal to 90 mass % of glycerides in glyceride-containing feed, separating crude biodiesel to provide higher glycerin containing layer and lighter alkyl ester containing layer via phase separation, subjecting lighter layer to vapor fractionation conditions to obtain lower boiling fraction containing lower alkanol and higher boiling fraction containing alkyl ester and glycerin, and washing the higher boiling fraction containing alkyl ester with water to obtain biodiesel with decreased concentration of glycerin and spent water stream; the molar ratio of lower alkanol to glyceride is greater than or equal to 3:1 to obtain crude biodiesel containing alkyl ester of fatty acids, glycerin, and lower alkanol; a portion of glycerin is contained in each of heavier and lighter layer; the subjecting lighter layer to vapor fractionation condition provides higher boiling fraction containing lower alkanol (less than 2000 ppm-m); the washing the higher boiling fraction containing alkyl ester with water involves concentrating spent water stream to obtain aqueous fraction and aqueous glycerin containing fraction and providing portion(s) of aqueous fraction as portion of water for the fourth step; and    (2) biodiesel making apparatus.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the biodiesel facility using the method of removing impurities from crude biodiesel stream.    Facility (100)    Lines (102, 104, 107A, 112, 114, 118, 124)    Acid treatment reactor (106)    Phase separator (110)    Side draw (116)    Fractionation column (120)