Blueberries (Vaccinium corymbosum L.) are one of the most popular soft fruits cultivated mainly in United States, Canada and Poland. These berries are characterized by a strong free radical scavenging properties due to the presence of bioactive compounds i.e. proanthocyanidins (PACs) (Gu et al., 2002) and anthocyanins (Wu et al., 2006). The consumption of blueberries may potentially contribute to the decreased risk of neurodegenerative, cardiovascular and urinary diseases, inhibition of the growth of cancer cells and prevention of vision problems and aging (Seeram, 2008). The seasonal availability of blueberries may limit their consumption and further processing should be employed to extend their
availability out of season. Dehydration of fruits is one of the oldest and the most diverse of unit operations in chemical engineering. It is constantly evolving to offer high quality dried materials and to develop new products for increasing demands of health-conscious consumers. Drying offers preservation of berry fruits, reduction in size and cost of storage
and transportation. However, prolonged exposure to elevated temperature, especially during the falling rate period, may result