Membrane-based Operations for the Fractionation of Polyphenols and Polysaccharides From Winery Sludges

Abstract The present work investigated the impact of ultrafiltration (UF) and nanofiltration (NF) membranes on recovery fractionation polyphenolic compounds polysaccharides from Sangiovese Cabernet Sauvignon wine lees. A laboratory-made flat-sheet membrane in cellulose acetate (CA400-38) was used UF treatment lees; three (CA316, CA316-70, CA400-22) a polyamide commercial (NF90) were NF All characterized terms hydraulic permeability rejection toward references solutes; performances measured productivity, fouling index, cleaning efficiency retention target compounds. Experimental results indicated that all effective separating rejecting more than 92% with polyphenols preferentially permeating through membrane. rejected 40% total polyphenols; rejections non-flavonoids flavonoids less 25% 12.5%, respectively. exhibited higher permeate flux values (of order 11–12 L/m 2 h) comparison membrane, despite observed differences specific solutes. Among prepared CA316 showed most part flavonoids. experimental support use processes sequential design to fractionate refine phenolic winery sludge for production concentrated fractions high antioxidant activities.