Efeito do processamento nas características da batata doce reidratada

Abstract

The sweet potato is a rustic culture of high adaptability, being produced in Brazil. It stands out for its low glycemic index and presenting numerous applications both domestically, and in industry. Based on the growing applications for sweet potatoes, this work was to study the variations in sweet potato characteristics rehydrated after passing through the drying process at different temperatures (50ºC, 60ºC and 70ºC) and with different citric acid concentrations (0.2%, 0.6%, 1.0%). Besides the drying kinetics, the color and texture instrumental parameters and the dehydrated sweet potato rehydration capacity were evaluated.Among the parameters used, the temperature was the highest influence on the results obtained for the color and texture characteristics. Models Hederson-Pabis, Page and Newton showed a good fit (P less than 10%, ranging from 0.0069 to 2.369), where the R² values ranged from 0.91431 to 0.99816, being the best verified experimental condition for drying at 60 ° C sweet potato without treatment with citric acid, the Page model.As a consequence of the results obtained, it was noticed that the best drying temperature is 60 ° C and that citric acid has a minimal effect, thus not requiring its use.