Peer-reviewed articles

Dehydration property of Shrimp (Pandalus borealis) undergoing heat-pump drying process

Authors: Zhang Guochen, Sigurjón Arason, Sveinn Víkingur Arnason

Version: IJABE - International Journal of Agricultural and Biological Engineering

Publication year: 2009


Peeled, headed or whole shrimp (Pandalus borealis) was dried in a heat-pump dryer at -2-0 ℃ and 20 ℃, respectively, and desorption isotherms characterizing the dehydration property of each shrimp sample group were determined. Desorption isotherms of shrimp handled differently and dried at different temperatures (-2-0 ℃ or 20 ℃) could be well described by Oswin's model (() 1 wnwa Xa a = -). The regression model of peeled, headed or whole shrimp was established, which is reliable for predicting the desorption isotherms of shrimp undergoing heat-pump drying. The handling methods of shrimp exhibit measurable influence on desorption isotherms of shrimp, whereas drying temperature (-2-0 ℃ or 20 ℃) has little influence on the constants of a and n in Oswin's model, of whole shrimp, even though it has certain influence on these constants of peeled and headed shrimp. For heat-pump drying, headed shrimp may have a better stability than peeled or whole shrimp due to the best stability.

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