Thick layer drying and storage of rice grain cultivars in silo-dryer-aerator: Quality evaluation at low drying temperature
Rosana Santos de Moraes,
Paulo Carteri Coradi,
Marcela Trojahn Nunes,
Marisa Menezes Leal,
Edson Irineu Müller,
Paulo Eduardo Teodoro,
Erico Marlon Moraes Flores
Affiliations
Rosana Santos de Moraes
Department of Agricultural Engineering, Rural Science Center, Federal University of Santa Maria, Santa Maria, RS 97105-900, Brazil; Laboratory of Postharvest (LAPOS), Campus Cachoeira do Sul, Federal University of Santa Maria, Cachoeira do Sul, RS 96503-205, Brazil
Paulo Carteri Coradi
Department of Agricultural Engineering, Rural Science Center, Federal University of Santa Maria, Santa Maria, RS 97105-900, Brazil; Laboratory of Postharvest (LAPOS), Campus Cachoeira do Sul, Federal University of Santa Maria, Cachoeira do Sul, RS 96503-205, Brazil; Corresponding author. Laboratory of Postharvest (LAPOS), Campus Cachoeira do Sul, Federal University of Santa Maria, Cachoeira do Sul, RS 96503-205, Brazil.
Marcela Trojahn Nunes
Department of Agricultural Engineering, Rural Science Center, Federal University of Santa Maria, Santa Maria, RS 97105-900, Brazil; Laboratory of Postharvest (LAPOS), Campus Cachoeira do Sul, Federal University of Santa Maria, Cachoeira do Sul, RS 96503-205, Brazil
Marisa Menezes Leal
Laboratory of Postharvest (LAPOS), Campus Cachoeira do Sul, Federal University of Santa Maria, Cachoeira do Sul, RS 96503-205, Brazil
Edson Irineu Müller
Department of Chemical Engineering, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil
Paulo Eduardo Teodoro
Department of Agronomy, Campus de Chapadão do Sul, Federal University of Mato Grosso do Sul, Chapadão do Sul, MS 79560-000, Brazil
Erico Marlon Moraes Flores
Department of Chemical Engineering, Universidade Federal de Santa Maria, Santa Maria, RS 97105-900, Brazil
Drying rice in a single layer in a silo-dryer-aerator allows uniform drying. The objective of this study was to evaluate the physical, physicochemical, and morphological quality of rice grain cultivars (IRGA 424, BRS Pampeira, and Guri INTA) in the lower (initial time) and upper (final time) layers in a silo-dryer-aerator, employing single-layer loading at low temperatures, using the methods of near-infrared spectroscopy, X-ray diffraction analysis, scanning electron microscopy, and multivariate statistical analysis. Drying rice in silo-dryer-aerator attenuated the moisture diffusivity in the grains, minimizing its effects on the physical, physicochemical, and morphological properties of the grains. However, the physicochemical constituents and morphology of starch were preserved by the low drying temperatures, mainly in the lower layers throughout the 2-month drying. The rice grains of the Guri INTA and BRS Pampeira cultivars were the most resistant to drying and showed greater uniformity on the final quality.
