Chemical composition, functional and technological (processing) properties of whey ingredients

Abstract

The growth in volumes of the milk whey manufacturing has revealed the new field of processing, such as dry whey ingredients production. The authors have made investigations of chemical composition, functional and technological (processing) properties of whey protein concentrates with protein of 35, 55, 80 % in dry matter, whey protein hydrolysate and cheese whey permeate. We used standard methods, generally accepted in research practice. The chemical composition of the tested samples has been determined, including their rehydration properties in terms of wettability, dispersibility and solubility. Heat denaturation of whey proteins during the processing is the reason for the bound groups–SH release and their reactivity enhancement, which provides antioxidant effect of whey ingredients (the antioxidant content in the tested samples is 0.031; 0.058; 0.095; 0.146 and 0.024 mg/g for the whey protein concentrates with protein of 35, 55, 80 % in dry matter, whey protein hydrolysate and whey permeate respectively). The functional and technological properties of whey ingredients make possible their application while producing different product line groups in order to control the technological processes and the quality factors of the enriched products.