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In the meat industry, the main applications of mechanical
refrigeration are:
Chilling of carcases directly after slaughter and dressing
Cooling of meat-handling rooms such as butcheries
Chilled water and brine for cooling poultry
Chill storage of edible meats and offal
Chilling of brine and pickling vats
Meat and poultry freezing
Animals when slaughtered, are at a body temperature of 39°C. The
carcase cools slightly as it is being dressed, but must be put into
refrigerated chambers as soon as possible [41, 42]. The speed of
cooling depends on the thickness of the joint, so the larger carcases
are usually halved into sides. While there is a need to remove body
heat to check deterioration, if this process is too quick with beef or
lamb, the resulting meat may be tough. A general rule for lean
meat such as beef is that no part should be cooled below 10°C for
at least 10 hours after slaughter, although this limit may be varied
by the local producer. The total time in this chiller stage will be
about 24 hours for a beef side [43]. Meat-cooling curves are shown |
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