298 94 307/02 Untersuchungen zum Stand der Umsetzung des ...

Applicability and characterisation of the measure
Teil 3 Seite 4-15
For a slaughtering of approx. 300 pigs/h, the installed cooling capacity of the shock cool-
ing tunnel is about 1000 kW, the temperature of the cooling medium (NH3-N) is -35°C.
Main achieved environmental performance
[to be completed]
Cross-media effect
[to be completed]
Economics
[to be completed]
Driving force for implementing the technique
[to be completed]
Reference plants
[to be completed]
Literature
[to be completed]
4.1.11.3 Water-spraying as cooling method
Description of the technique
In the mist cooling method, the entire pig surface is sprayed with water. The cooling ef-
fect is achieved by evaporation of the spray water on the surface of the carcass. The fine
droplets with a size of 10 to 100µ which are spread during the spraying are evaporated by
the warmth of the carcasses. When these droplets evaporate, there remains a very high
moisture contents on the surfaces, which prevents the meat from parching. As soon as
the droplets are evaporated, the spraying is repeated until the desired cooling period has
been reached. For this cyclical treatment, the pig halves are conveyed through the water
spraying cabins which are installed in the cooling tunnel. For instance, during a cooling
period of three hours the pig halves are conveyed through 30 to 35 cabins. In each cabin,
the spraying with sterile water lasts only 1 to 3 seconds, that is the entire spraying time
during a three-hour cooling period amounts to a treatment of 50 to 100 seconds.
Applicability and characterisation of the measure
[to be completed]
Main environmental performance achieved