Mejora del secado convencional de zanahoria por aire caliente con pretratamiento de microondas
; Kvapil, Maria Florencia
; Iturriaga, Laura Beatriz Otros responsables
Fecha
05/2022
Editorial
Consejo de Decanos de Ingeniería del NOA
Revista
Investigaciones en Facultades de Ingeniería del NOA
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1853-6662
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Resumen
Se deshidrataron rodajas de zanahoria utilizando dos métodos de secado: aire caliente (SC) (secado convectivo convencional) y microondas como tratamiento previo a la aplicación de aire (SMC). Los tratamientos de secado al aire se realizaron a dos temperaturas diferentes: 60 y 80 °C manteniendo la velocidad de aire constante. Con respecto al tratamiento con microondas se utilizó la máxima potencia del dispositivo (1180 W) hasta alcanzar una pérdida de peso adecuada y luego se concluyó el secado siguiendo las mismas condiciones de secado convectivo. Se obtuvieron las curvas de cinética de secado correspondientes para cada tratamiento aplicado y se compararon. Además, se determinó la rehidratación del producto final como propiedad física. Las rodajas de zanahoria deshidratadas con el tratamiento previo de microondas resultaron con menor contenido de humedad en un menor tiempo y mayor potencial de rehidratación en comparación con las obtenidas mediante deshidratación por convección.
Carrot slices were dehydrated using two drying methods: hot air (SC) (conventional convective drying) and microwave as a pre-treatment to the application of air (SMC). The air drying treatments were carried out at two different temperatures: 60 and 80 °C, keeping the air speed constant. In regard to the microwave treatment, the maximum power of the device (1180 W) was used until an adequate weight loss was achieved and then the drying was concluded following the same convective drying conditions. The appropriate drying kinetic curves were obtained for each applied treatment and compared. In addition, the rehydration of the final product was determined as a physical property. Carrot slices dehydrated with the microwave pre-treatment resulted in lower moisture content in a shorter time and higher rehydration potential compared to those obtained by convection dehydration.
Carrot slices were dehydrated using two drying methods: hot air (SC) (conventional convective drying) and microwave as a pre-treatment to the application of air (SMC). The air drying treatments were carried out at two different temperatures: 60 and 80 °C, keeping the air speed constant. In regard to the microwave treatment, the maximum power of the device (1180 W) was used until an adequate weight loss was achieved and then the drying was concluded following the same convective drying conditions. The appropriate drying kinetic curves were obtained for each applied treatment and compared. In addition, the rehydration of the final product was determined as a physical property. Carrot slices dehydrated with the microwave pre-treatment resulted in lower moisture content in a shorter time and higher rehydration potential compared to those obtained by convection dehydration.
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