Affiliation:
1. Universidade Federal da Grande Dourados/UFGD, Brazil
2. Zambeze University, Mozambique
3. Instituto Federal de Educação, Ciência e Tecnologia de Goiás, Brazil
4. Universidade do Estado de Mato Grosso/UNEMAT, Brazil
Abstract
ABSTRACT Buckwheat has become important in the food sector as its flour does not contain gluten. Since buckwheat is a relatively new crop in the agricultural environment, there is little information available regarding its processing. Drying is one of the most important post-harvest stages of buckwheat. The aim of the present study was to describe the drying process of buckwheat grains. Buckwheat grains with a moisture content of 0.41 ± 0.01 (dry basis, d.b.) were harvested, followed by drying in an experimental dryer at the temperatures of 40, 50, 60, 70, and 80 °C, at an air speed of 0.8 m s-1. The drying rate was determined, and the mathematical models generally employed to describe the drying process of several agricultural products were fitted to the experimentally obtained data. Model selection was based on the Gauss-Newton non-linear regression method and was complemented by Akaike Information Criterion and Schwarz’s Bayesian Information Criterion. It was concluded that the drying rate increased with an increase in temperature and decreased with an increase in drying time. It is recommended to use the Midilli model to represent the drying kinetics of buckwheat grains at the temperatures of 40, 60, and 70 °C, while the Approximation of diffusion model is recommended for the temperatures of 50 and 80 °C. The magnitudes of effective diffusion coefficients ranged from 1.8990 × 10-11 m2 s-1 to 17.8831 × 10-11 m2 s-1. The activation energy required to initiate the drying process was determined to be 49.75 kJ mol-1.
Subject
Soil Science,General Veterinary,Agronomy and Crop Science,Animal Science and Zoology,Food Science
Reference35 articles.
1. Mathematical model for heat and mass transfer during convective drying of pumpkin;AGRAWAL S. G.;Food and Bioproducts Processing,2017
2. Potential of sunflower, castor bean, common buckwheat and vetiver as lead phytoaccumulators;ALVES J. D. C.;Revista Brasileira de Engenharia Ambiental,2016
3. Drying kinetics and determination of effective diffusion coefficient of sorghum grains;BOTELHO F. M.;Revista Brasileira de Milho e Sorgo,2015
4. Soybean grain drying kinects: Varietal influence;BOTELHO F. M.;Revista Engenharia na Agricultura,2018
5. Ministério da Agricultura e Reforma Agrária. Secretaria Nacional de defesa Agropecuária;Regras para análise de sementes,2009
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