Comparison of Physicochemical Properties of Spray-dried Camel's Milk and Cow's Milk Powder

Abstract

In the present study, fresh raw camel and cow's milk were concentrated to 20-30% total solids, and then dried using a pilot spray-dryer. The effect of direction of feed on physicochemical properties camel milk powders on physicochemical characteristics of the various spray-dried milks were determined. Some of the examined parameters of spray dried milks were affected, such as the water activity which had low values (0.154 - 0.208). Moreover, the degree of lightness was affected by direction of feeding, where co-current feeding gave the highest degree of lightness (97.73), when compared to counter current (93.82). The spray-drying samples also affected the solubility which recorded higher values of tested milk powder samples. The flowability was affected by the direction of feeding; the co-current feeding gave high values, when compared to counter-current feeding which gave less values (1.21-1.37). The yield was also affected, the spray-dried samples gave (68.84-88.20). The chemical analysis indicated that moisture, protein, fat, ash and acidity ranged 1.01-2.41%, 23.75-26.64%, 27.86-29.82% and 0.1-029%, respectively. The results show the importance of optimizing the drying process, in order to obtain products with better functional and physicochemical properties.