CHEMICAL PRETREATMENT AND MICROFILTRATION FOR MAKING DELIPIDIZED WHEY-PROTEIN CONCENTRATE

Chemical pretreatment, microfiltration (MF) and ultrafiltration (UF) w ere applied to produce delipidized whey protein concentrates (WPC). Pr ocesses including both chemical pretreatment and MF resulted in WPC wi th <0.5% lipids. Low-pH UF and isoelectric point (pI) precipitation we re more effective for lipid removal than chemical pretreatment by ther mocalcic aggregation. Protein permeation ratios in MF processes were i mproved by UF preconcentration of whey. Protein permeation and flux we re different between the two MF membranes used. Isoelectric point prec ipitation increased beta-Lg contents, but not alpha-La, in the resulti ng WPC (B). Minor proteins exhibited lower concentrations in WPC B and MF WPC products.