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Challenges of effective chilling of Atlantic salmon in refrigerated sea water: field tests

Challenges of effective chilling of Atlantic salmon in refrigerated sea water: field tests

Category
Part of a book/report
Abstract
This papers is summing up main challenges which occur at large-scale industrial slaughter houses when chilling Atlantic salmon by refrigerated sea water (RSW). The study includes strategies of efficient chilling in 100 m 3 spiral tanks based on the field tests. Analysis showed high density of fish in a chilling tank and low refrigerated sea water flow lead to non-uniform temperature distribution in the tank. Temperature at the surface of the fish can exceed values of RSW outlet temperature, which increases the chilling time, reduces efficiency of the process and limits capacity of equipment. The chilling index can vary from 66 to 108% for the same type of chilling tank with respect to operation parameters. Agitation of fish in the chilling tank increases chilling efficiency up to 87.9 %. The limited time of fish holding in the chilling tank (75-100 min) was not sufficient for achieving temperature of 2.0 °C for any scenario, when initial temperature of fish was higher than 11.0 °C.
Client
  • Norges forskningsråd / 269175
Language
English
Author(s)
Affiliation
  • Norwegian University of Science and Technology
  • SINTEF Ocean / Sjømatteknologi
Year
2019
Published in
Actes du ... Congres international du froid
ISSN
1025-9031
Publisher
International Institute of Refrigeration
Book
Proceedings of the 25th IIR International Congress of Refrigeration. Montréal, Canada, August 24-30, 2019
Booklet
ICR 2019
ISBN
978-2-36215-035-7
Page(s)
3043 - 3050