Abstract
ABSTRACTIn order to investigate the influence of far-infrared radiation (FIR) assisted heat pump drying (HPD) on moisture distribution and rehydration kinetics of squid fillets during rehydration, squid samples were dried by HPD or combining with FIR at 100, 500, and 800 W. Nuclear magnetic resonance (NMR) images showed that water penetrated from the periphery to the central region during rehydration. After 60 min of rehydration, the HPD samples had high NMR signal intensity, followed by HPD + FIR (100 W), HPD + FIR (500 W), and HPD + FIR (800 W). The Peleg model was the most suitable for describing the rehydration process at all conditions based on the experimental data evaluation. HPD samples presented the highest rehydration ratio and ability, while the lowest rehydration ratio and capacity was found for HPD + FIR (800 W) samples. This result would contribute to optimizing the balance among rehydration ability, final product texture quality, and drying processing control.
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