Water sorption kinetics of damaged beans: GAB model

Revista Brasileira de Engenharia Agricola e Ambiental

Botelho, Fernando M.¹  Campos, Renata C.²  Vanegas, Jaime D. B.²  Corrêa, Paulo C.²  Leite, Rafael²  Baptestini, Fernanda M.³ 

[1] Universidade Federal de Mato Grosso, Sinop, Brazil;Universidade Federal de Viçosa, Viçosa, Brazil;Universidade Federal do Espírito Santo, Alegre, Brazil

关键词: hysteresis;    adsorption;    desorption;    Phaseolus vulgaris L..;   

DOI  :  10.1590/1807-1929/agriambi.v21n8p550-555

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

The objective of this study was to model the water sorption kinetics of damaged beans. Grains with initial moisture content of 53.85%, dry basis (d.b.), were used. One portion of the grains was used to obtain desorption isotherms, while the other was subjected to drying until the moisture content of 5.26% (d.b.), so that it was subjected to the adsorption. For the induction of damage, a Stein Breakage Tester was used. To obtain the equilibrium moisture content, grains were placed in a climatic chamber at 20, 30, 40 and 50 ± 1 °C combined with relative humidity of 30, 40, 50, 70 and 90 ± 3%. The GAB model fitted well to the equilibrium moisture experimental data of damaged grains and control. With increasing temperature, the monolayer moisture contents decreased in adsorption and desorption processes, ranging from 9.84 to 5.10% d.b. The lower moisture content in the monolayer in damaged grains indicates that lower moisture content is necessary to ensure their conservation.

【 授权许可】

CC BY