Impact of spray-drying conditions on physicochemical properties and rehydration ability of skim dromedary and cow's milk powders

Impact of spray‐drying conditions on flow properties of skim dromedary and cow's milk powders using the FT4 powder rheometer

“…On the contrary, spray-drying conditions had no significant effect on the SE of partially skim cow's milk powders, indicating that they did not affect the flowability of cow's milk powder. The lower SE of partially skim dromedary's milk powder spray-dried in C1 conditions (8.49 mJ/g) could be explained by differences in surface composition (Felfoul et al, 2020).…”

“…The spray-drying conditions such as air inlet and outlet temperatures as well as drying air flow rate suitable for the production of skim milk powder were selected not only based on literature (Schuck et al, 2012) but also after preliminary experimentations in order to obtain skim milk powders suitable for storage, i.e., having a moisture content not exceeding 5% (w/w) (Felfoul et al, 2020;Schuck et al, 2012). Two assays differing in spray-drying conditions were carried out with a view to evaluate the influence of air outlet temperature (Table 1).…”

“…Ash content was obtained by mass loss after incinerating 10-ml milk sample or 3-g powder in a furnace at 550°C during 6 hr. Proteic nitrogen content was determined by the Kjeldahl method (Vapodest, Gerhardt GmbH & Co. KG, Königswinter, Germany), and protein content was deduced from nitrogen content using a conversion factor of 6.38 (Felfoul et al, 2020).…”

“…Carbohydrates content was deduced by difference with other components assuming that vitamins were weakly represented (Felfoul et al, 2020).…”

“…Classical granulometric parameters D 10 , D 50 , and D 90 were recorded (D X corresponds to the size for which X% of the particle population has smaller size). Span was calculated to evaluate the width of the particle-size distribution (Equation 1) (Felfoul et al, 2020):…”