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Abstract
Resumen
The drying kinetics of coriander leaves and stems, with or without blanching, was studied at several temperatures (50, 60, 70, and 80°C) at constant air velocity (1.5 m s−1) in a fixed-bed dryer. Three drying models, Henderson and Pabis, Midilli et al., and the Logarithmic, were fitted to the experimental data. According to the results obtained, it was verified that the increase in the temperature of drying air, increases the drying rate of the coriander leaf and stem. Blanching used as a pre-treatment favors the increase in the drying rate of the stem. The Midilli et al. drying model was found to satisfactorily describe the air-drying curves of coriander leaves and stems.
La cinética del secado de las hojas y tallos de cilantro, con o sin escaldado, se estudió a diferentes temperaturas (50, 60, 70 y 80°C) con velocidad constante del aire (1,5 m s−1) en un secador de lecho fijo. Tres modelos matemáticos: Pabis y Henderson, Midilli et al., y el logarítmico, se ajustaron a los datos experimentales. De acuerdo a los resultados obtenidos, se comprobó que el aumento de la temperatura del aire de secado, aumentó la velocidad de secado de la hoja y tallo de cilantro. El escaldado utilizado como pre-tratamiento, favorece el aumento en la velocidad de secado del tallo. El modelo matemático de Midilli et al. presentó mejor ajuste para los datos experimetales.
Palabras clave: Pretratamiento, Coriandrum sativum, escaldado, deshidratacíon
