Mathematical modeling of convective air drying of quinoa-supplemented feed for laboratory rats

• Autor(a) principal: Vega-Gálvez,Antonio
• Data de Publicação: 2011
• Outros Autores: Dagnino-Subiabre,Alexies, Terreros,Gonzalo, López,Jessica, Miranda,Margarita, Di Scala,Karina
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Archives of Biology and Technology
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100021
• topic: rat feed; quinoa; drying kinetics; modeling; statistical test

Drying kinetics of quinoa-supplemented feed for laboratory rats during processing at 50, 60, 70, 80 and 90ºC was studied and modeled in this work. Desorption isotherm was obtained at 60ºC giving a monolayer moisture content of 0.04 g water/g d.m. The experimental drying curves showed that drying process took place only in the falling rate period. Several thin-layer drying equations available in the literature were evaluated based on determination coefficient (r²), sum squared errors (SSE) and Chi-square (χ2) statisticals. In comparison to the experimental moisture values, the values estimated with the Logarithmic model gave the best fit quality (r² &gt;0.994, SSE < 0.00015 and χ2 < 0.00018), showing this equation could predict very accurately the drying time of rat feed under the operative conditions applied.