Poultry International - July 2017 - 24
24 ❙ PoultryInternational
HOW TO MITIGATE DUST AND AMMONIA IN CAGE-FREE HOUSES
exhaust from cage-free houses by between 45 and 50
■ Dry filters: Dry air filters, like the kind found in a household HVAC system, can be effective in filtering the air
inside a house as air is pumped through the filer. Studies
show a dust reduction ability of about 40 percent.
Exhaust pollutant mitigation
■ Bio-Curtain: Xin explained a Bio-Curtain is a sort of
canvas cover placed over the exhaust fan used by some
hog and broiler farmers to control emissions. The curtain catches the dust and other emissions and can be
used with an electrostatic system. It's a relatively lowcost option that can reduce dust emissions by about 40
percent and ammonia by about 10 percent.
■ Vegetative buffer: Planting trees, shrubs and bushes
around a layer house is a popular strategy in the
Midwest and Southeast, Xin said, for controlling dust
and ammonia emissions from layer houses. Vegetation
can help with both problems, but not the smell.
However, the "out of sight, out of mind" principle seems
to work for vegetation and chicken house odors. The
cost of installing vegetation is low as well.
scrubbers: The most sophisticated, and likely expen■
sive option, is using one- or three-stage wet scrubbers
to clean exhaust before it is expelled from the chicken
house. A single-stage scrubber - where air is forced
through a solution to clean it - can reduce dust emissions by about 40 percent and ammonia by about 80
percent. A three-stage scrubber, with separate phases to
take out the dust, the ammonia and the odor, can reduce
dust emissions by more than 70 percent and ammonia
by 95 percent, but it is far more expensive than a singlestage scrubber. Both options, Xin said, are prohibitively
expensive without some kind of subsidy to offset the
cost of the technology and its operation. ■
in all feed,
all the time.
OPTIMIZE your Feed Performance.
Using All-Natural Micro-Aid® in all your feed, all the time
enhances feed efficiency, helps maximize production.
Reduces the production of noxious litter gases resulting in
healthier foot pads, reduced odor & better neighbor relations.
Aids in establishing ideal GI tract health allowing for optimum
nutrient utilization & peak bird performance.
www.WATTAgNet.com ❙ July 2017