COLOR KINETICS OF CLEANED EDIBLE BIRDS’S NEST DURING DRYING

摘要

A heat pump dryer was used to investigate the potential of dehumidified medium (26°C,27％ RH) in enhancing drying kinetics and minimizing color change of cleaned bird’s nest during processing.Comparison was made against conventional hot air drying (50°C-90°C,2％RH-24％ RH).The results show that bird’s nest sample in low temperature drying took about 9 h to achieve its equilibrium moisture content and total color change of the final product was the lowest among other drying methods.Drying rate of hot air dried sample was found increasing with temperature but the elevated hot air temperature resulted in higher total color change.