Partially Desugared Whey Protein Concentrates

In the applications of whey powder, the minerals can interfere with the taste. The production of demineralized whey powder proceeds via ion exchange or, preferentially, electrodialysis (1.5-4.5V/cell current density 5-20mA/cm membrane area. Fig. 10.31). The course of demineralization is shown in Fig. 10.32. 

In the ultrafiltration of whey, protein concentrates depleted of lactose to various extents are obtained, depending on the number of stages and amount of wash water. Another, less gentle method involves the heating of whey (95 °C, 3 min) by direct steam injection, followed by precipitation of the denatured proteins at pH 4.5, separation in a sedimentation centrifuge (2000-4000 min ), and drying. 

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