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24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

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Internet de l'unité STLO Science et Technologie du Lait et de l'Oeuf

STLO Research Unit

Our SD2P software predicts spray drying parameters

A new software package to predict spray drying parameters
Spray drying is the most frequently used technique for dairy product dehydration. It is an effective technique for preservation of biological products since it does not involve severe heat treatment. It also enables powder storage at ambient temperature.

Spray drying considerably impacts the quality of milk powders, both at the production stage and during storage and rehydration. Poor drying conditions can lead to the production of several tons of unacceptable powders and even to the temporary shutdown of the facility, resulting in considerable economic loss.

  • We designed a special programme based on the speed of drying by desorption, which predicts the optimal spray drying operating parameters according to characteristics of the product to be dried, and avoids the costly empirical approaches generally used.
  • Our system can be implemented to determine drying parameters using: Desorption drying kinetics / Cell wall loss / Evaporating capacity or the facility of air and product flow / Absolute humidity of outside air / Humidity or final relative Aw / Humidity to be obtained / Temperature of the product to be dried.
  • These calculated parameters were then validated on spray dryers with a precision of ± 5% and ± 1% for the temperature of input and output air, respectively, compared to ± 15% and ± 5% for values determined empirically.

SD2P software

SD2P software
Spray Drying Parameters Simulation and Determination

Our calculation method was converted to a software package designed primarily for the dairy industry. Ongoing additional research could extend its application to other agri-food sectors as well as the pharmaceutical industry.




Read more

Schuck P., Dolivet A., Méjean S., Zhu P., Blanchard E., Jeantet R. (2009) Drying by desorption: A tool to determine spray drying parameters, Journal of Food Engineering 94:199–204.


Pierre Schuck •

>>> To Research Team