PROCESS FOR TREATING A SWEET WHEY MATERIAL CONTAINING CGMP AND RELATED METHOD FOR PRODUCING A PROTEIN MATERIAL HAVING A TARGETED TRYPTOPHAN/THREONINE RATIO
Process for the treatment of a sweet whey material (SWM) containing cGMP (caseinoGlycoMacroPeptide), comprising the following steps: Decationising the SWM material so as to obtain a sweet whey SW having a pH value of 1 to 4.5； Treating said SW in a fluidized bed reactor comprising a volume of an anionic resin, at 10 to 18° C., wherein said SW contacts said resin so that the resin absorbs between 0% and 100% of the cGMP present in the SW； and Recovering a protein material； Wherein the treating is such that the resin absorbs 30 to 45 g/L of the cGMP present in the sweet whey. Method for producing a protein material from a SWM cGMP, said protein material having a targeted tryptophan/threonine (Trp/Thr) ratio, comprising the following steps: —Implementing the treating process twice, wherein the resins absorbs P1 of the cGMP, obtaining a first protein material having Trp/Thr1 and wherein the resins absorbs a percentage P2 of the cGMP, obtaining a second protein material having Trp/Thr2； —Drafting the linear calibration curve in a graph (cGMP %； Trp/Thr) by positioning (Trp/Thr1；P1) and (Trp/Thr2； P2) and drawing a line through these two plots； —Determining the specific ratio of cGMP present in the SW that the resin should absorb with respect to the targeted Trp/Thr by the calibration curve； and —Implementing the process of the invention on the SWM wherein the resins absorbs the specific ratio of cGMP, so that to obtain the protein material having the targeted Tp/Thr.
