Abstract
The present study investigated the Interval Starting Accessibility Drying (ISAD) process with the main objective to optimize the main processing parameters, i.e. the active time (tON) and the tempering time (tOFF), which ranged between 5 to 30 s and 1 to 3 min, respectively. ISAD performances were compared with continuous airflow drying for several quality parameters and energy consumption. The modulation of the time related operating conditions allowed rewetting the surface after each tempering time in a total way with tON= 5s-and tOFF=2 or 3min. ISAD significantly affected (p<0.05) the effective drying time and the energy saving which reached as much as 87.26% compared to continuous drying when tON= 5s and tOFF =3 min. The processes did not significantly impact the shrinkage, rehydration capacity or total color change. However, drying processes notably influenced the content of polyphenols and carotenoids. The optimal conditions of combined optimized responses were tON = 5 s of tOFF = 2.52 min with a desirability D= 0.924.
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