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/Thrl 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/ThrlP1) 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.
