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Drying Technology
An International Journal
Volume 31, 2013 - Issue 7
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Original Articles

Energy Analysis of Poly-hydroxybutirate (PHB) Drying Using a Combined Microwave/Rotating Pulsed Fluidized Bed (MW/RPFB) Dryer

Gabriela Silveira da Rosa Chemical Engineering, Federal University of Pampa, Bagé, Rio Grande do Sul, BrazilCorrespondence[email protected]
,
Antonio Marsaioli Jr. School of Chemical Engineering, State University of Campinas, Campinas, São Paulo, Brazil
&
Sandra Cristina dos Santos Rocha School of Chemical Engineering, State University of Campinas, Campinas, São Paulo, Brazil
Pages 795-801 | Published online: 03 May 2013
 
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Abstract

The aim of this study was to investigate the drying kinetics and energy efficiency of a combined microwave/rotating pulsed fluidized bed (MW/RPFB) dryer to dry particles of poly-hydroxybutirate (PHB). In order to analyze the effects of microwaves and hot air conditions on the drying kinetics of PHB and energy efficiency, an experimental design technique was applied. Drying energy efficiencies were in the range of 12–30%, and an estimated value of 10.5% was found for pure convective drying of PHB in an RPFB with the same final moisture content.

ACKNOWLEDGMENTS

The authors acknowledge the financial support of FAPESP for this work. Thanks are also due to BIOCYCLE for supplying samples of PHB.

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