WATT PoultryUSA - December 2017 - 60
60 ❙ WATTPoultryUSA
CONTROLLED ATMOSPHERE STUNNING
spheric pressure stunning (LAPS)
and gas stunning.
The low atmospheric pressure
stunning system utilizes computercontrolled, slow decompression
within large chambers. This system allows for the use of existing
broiler containment modules (cages), does not require the continued
purchase of gasses and is approved
for use in the U.S.
There are a greater variety of
gas stunning options available for
use. Generally, these systems operate in a multi-phase process where
gas concentrations increase gradually to fi rst induce unconsciousness, then continue to completion
at higher gas levels. The types
of gases used can be carbon dioxide, nitrogen or argon, or a
combination. Carbon dioxide is
the most commonly used method.
Additionally, higher levels of oxygen during the induction of unconsciousness can also be used.
Pit versus tunnel systems
There are several types of gas
stunning systems to be considered. Pit systems function by the
gradual lowering of drawers or
cages into a pit containing gas.
These pits are generally underground and allow for the greatest
conservation of gases used for
stunning. The lowering of the
drawers into the pit allows for a
gradual increase of gas concentrations during stunning as well as
stunning without dumping.
Tunnel systems remain above
ground and also allow for multiphase stunning. In tunnel systems, birds can be stunned in the
transport modules, in a single
layer of drawers, or in a single
layer of birds following unloading. These systems may require
a larger footprint and a higher
amount of gas per bird than a
pit system but do not require the
digging and sealing of a pit.
If traditional dump-type trans-
Dr. Bill Dozier.
Professor, Poultry Science Department
Dr. Hans H. Stein
Professor of Nutrition
University of Illinois
Register Today at WATTAgNet.com/webinars
Live Broadcast on Tuesday, January 9, at 9 a.m. Central (Chicago)
View On-Demand any time after January 10
Formulating DDGS into Monogastric Diets to Maximize Profits
Feed costs represent the greatest expense associated with swine or poultry
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This webinar will discuss practical approaches for including DDGS in both swine
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a product by
Visit us at IPPE, booth C2213
www.WATTAgNet.com ❙ December 2017
11/27/2017 9:09:51 AM