Resumen en inglés

The objective of this project was to determine the best spray drying conditions to obtain the minimum response conditions of final product moisture and air outlet temperature, using multiobjective minimization as a working technology response surface methodology with a Draper and Lin design. Initially, stevia solutions were dried by modifying the variables concentration of the solution (°Brix), rotor speed (RPM), air feed flow (m3 /h) and air inlet temperature (°C) being in total 23 experimental units including 7 central points. The humidity analysis as a response variable was on average 5.6% and showed that the independent variables are not significant (p <0.05) on it except the interaction between air flow and rotor speed, while the analysis of Air outlet temperature averaged 73.4 °C showing that the rotor speed and the interaction between the concentration of the solution with it are significant (p<0.05) while the other independent variables and their interactions were not significant. On the other hand, the variables response yield and solubility remained constant for each experimental unit. Finally, a multi-response minimization was performed using the desirability function, a humidity of -1.31% and an air outlet temperature of 56.50 °C was obtained, however, the lack of adjustment of the predictive models makes the results not consistent