Table 10 Different quick freezing techniques (fishery products) [87]
From: A review on mechanisms and commercial aspects of food preservation and processing
Criteria | Contact plate freezing | Air-blast freezing | Cryogenic freezing |
|---|---|---|---|
Capital cost | Low capital investment | Economic to construct and operate | High capital costs |
Operating cost | Low operating cost | Higher operating cost | Higher operating cost |
Heat transfer | Controlled heat transfer | Efficient heat transfer | Efficient heat transfer |
Product line | Generally bulk freezing | Flexible | Flexible |
Required floor space | Large | Large | Small |
Refrigeration plant | Required | Required | Not required |
Maintenance cost | Low | Low | Minimum |
Dehydration loss | High | High | Minimum |
Product quality | Reasonably good product quality | Good product quality | Superior product quality |