Patent ID: 8501252

Claim:
A decalcification method of an aqueous solution of whey or whey permeate comprising multivalent cations Ca 2+ and Mg 2+ and anions able to form complexes with at least a part of said multivalent cations, comprising the operations of: (a) replacement of at least a part of said anions able to form complexes of the aqueous solution by monovalent anions non-able to form such complexes, the replacement operation comprising processing of said aqueous solution by a strong anionic resin of which the counter-ion is a monovalent anion non-able to form complexes with said multivalent cations, (b) replacement of at least a part of said multivalent cations of the aqueous solution by monovalent metal cations by treatment of said aqueous solution by a strong cationic resin of which the counter-ion is a monovalent metal cation, wherein operation (b) is performed on the aqueous solution having undergone operation (a); and (c) regeneration of the anionic resin and/or the cationic resin by means of a regeneration agent comprising a dissolved salt of which the cation is of the same type as the monovalent metal cation forming the counter-ion of the cationic resin and/or of which the anion is of the same type as the monovalent anion forming the counter-ion of the anionic resin.