In a framework of research work powdered whey protein concentrates made of sweet whey and whey from fresh acid cheese production were obtained. Chemical composition, pH and titration acidity were determined in sweet whey and whey from fresh acid cheese production and also in liquid and powdered whey protein concentrates. Functional properties of whey protein concentrates were determined and compared between themselves and compared with concentrates obtained by other researchers. Powdered whey protein concentrate made of whey from fresh acid cheese production had better emulsifying properties and better emulsion stability after heat treatment in comparison with whey protein concentrate made of sweet whey. But whey protein concentrate made of whey from fresh acid cheese production bound less amount of oil and absorbed less amounts of oil on its surface in the emulsion in comparison to whey protein concentrate made of sweet whey. Tests of gelation properties of 10% solutions of whey protein concentrates showed that both concentrates did not form strong gels.
whey, protein concentrates, functional properties, physico-chemical properties