INFLUENCE OF ULTRASOUND PRETREATMENT ON CONVECTIVE DRYING OF PINEAPPLE

INFLUENCE OF ULTRASOUND PRETREATMENT ON CONVECTIVE DRYING OF PINEAPPLE

CORRÊA, J. L. G.; RASIA, M. C.; GARCIA-PEREZ, J. V.; MULET, A.; CÁRCEL, J. A.

Artigo:

The convective drying is a slow operation. Several techniques has been studied to increase the kinetics of process such as the pretreatments in liquids or the application of high intensity ultrasound during both, pretreatment or convective drying. In this work, the influence of the pretreatment (with distilled water (20 and 40 min at 25 °C) on convective drying (40 °C, 1 m s-1) of pineapple slices (2.0 cm diameter, 0.5 cm thickness) was studied. The application of ultrasound during pretreatment (55.5 W/L, 40 kHz) or during convective drying (31 kW m−3; 21.8 kHz) was also addressed. The results showed that the application of ultrasound during the pretreatment and during drying increased water transport and reduced the drying time. The use of ultrasound in the pretreatment or in the convective drying could improve drying processes.

The convective drying is a slow operation. Several techniques has been studied to increase the kinetics of process such as the pretreatments in liquids or the application of high intensity ultrasound during both, pretreatment or convective drying. In this work, the influence of the pretreatment (with distilled water (20 and 40 min at 25 °C) on convective drying (40 °C, 1 m s-1) of pineapple slices (2.0 cm diameter, 0.5 cm thickness) was studied. The application of ultrasound during pretreatment (55.5 W/L, 40 kHz) or during convective drying (31 kW m−3; 21.8 kHz) was also addressed. The results showed that the application of ultrasound during the pretreatment and during drying increased water transport and reduced the drying time. The use of ultrasound in the pretreatment or in the convective drying could improve drying processes.

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DOI: 10.5151/chemeng-cobeq2014-0804-23687-175898

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• [16] ACKNOWLEDGEMENTS The authors would like to thanks CAPES and FAPEMIG, from Brazil, and Ministerio de Economia y Competitividad and FEDER (DPI2013-37466-C03-03), from Spain, by the financial support to this work.

Como citar:

CORRÊA, J. L. G.; RASIA, M. C.; GARCIA-PEREZ, J. V.; MULET, A.; CÁRCEL, J. A.; "INFLUENCE OF ULTRASOUND PRETREATMENT ON CONVECTIVE DRYING OF PINEAPPLE", p-3991-3996. In: Anais do XX Congresso Brasileiro de Engenharia Química - COBEQ 2014 [= Blucher Chemical Engineering Proceedings, v.1, n.2]. São Paulo: Blucher, 2015.
ISSN 23591757, DOI 10.5151/chemeng-cobeq2014-0804-23687-175898