OSMOTIC DEHYDRATION OF COD FILET WITH SKIN IN A STAGNANT BRINE

ABSTRACT

Salt transport models and diffusion coefficients have been studied during osmotic dehydration of fish muscle in stagnant, saturated brine. Attempts have been made to estimate mass transfer resistance through skin and through stagnant boundary layer at surface. These resistances have been converted to equivalent product thickness or “length” in order to apply analytical solutions to the diffusion equations (i.e. Fick's second law). A similar approach has been used to estimate the extra mass transfer resistance due to the stagnant brine, as most experiments in literature have been made under agitated conditions, in contrary to industrial practice, which is in stagnant brine.

ACKNOWLEDGMENTS

Thanks are due to student J. J. Eleñas, Universidad Cadiz, for experimental and analytic assistance in this work, and to Professors I. Strømmen and M. Lamvik, NTNU – The Norwegian University of Science and Technology for clarifying advice and discussion.