Poultry International - August 2018 - 34

34 ❙ PoultryInternational
AIR QUALITY CHALLENGES

Layer house emissions under close scrutiny in EU
Dr. Albert Winkel, livestock
and environment researcher,
Wageningen University, the
Netherlands, offers a warning to producers considering
adopting cage-free production: "We have learned that
moving to cage-free production has solved an animal
welfare problem, but has
created another serious issue
- environmental contamination." In fact, since European
Union Directive 2008/50/EC
was produced, agriculture has
received much attention as a
source and a solution to the
problem.

Environmental control
methods
In the Netherlands, agriculture ranks No. 3 behind
automobiles and factories
as a source of particulate
matter in the environment.
Other parts of Europe with a
high agriculture and human
population concentration,
such as Germany, Belgium
and northern Italy are also
focused on the issue. In an
attempt to meet the standards
of the directive, the Netherlands has implemented a
permitting system to regulate
new construction and remodeling of current animal hous-

ing. Dust, odor and ammonia
emission projections are
individually calculated based
on emission factors for each
species, housing system, type
of animal (layers, broilers,
etc.) and number of animals.
A dispersion model calculates emissions in the vicinity
of a site for 10 years based
on meteorological data for
the specific farm. These
calculated emission projections are then compared to
the dust limit values of the
directive before approvals
are granted.
Layer producers in Europe
using aviary systems have
used several methods to manage dust, ammonia and odor,
both in and outside the layer
house. Heat exchangers, by
design, are quite effective in
reducing particulate matter emissions with filtration
before exhausting house air.
Taller exhaust chimneys are
used to dilute dust concentration. An important tool inside
the house is use of automated
litter scrapers at floor level.
Winkel's soon-to-be published
research has shown that litter
depth kept to about 1 inch
reduces particulate matter
and ammonia by 25 percent.
And a final important environ-

mental control method is the
use of manure drying tunnels
located next to the layer
barn. This equipment uses
warm exhaust air from the
barn to dry manure on perforated belts. Upon forcing
air through the manure layer,
particles are filtered out.
Dry matter content increases
from 30 percent coming from
the barn to 80 percent or
more after processing, which
considerably reduces manure
disposal fees for farmers.

New design concepts
Researchers at Wageningen University are working on new aviary design
concepts that will reduce
environmental contaminants.
One promising concept
being studied is to separate
the birds' clean and dirty
activities into separate
rooms. In the clean room,
birds will eat, drink, perch
and lay eggs and have free
access to the other room
where dust bathing and
scratching in litter will be
available. The results are
still two years away, but
offer new approaches to
solving some of the environmental issues with cage-free
egg production.

www.WATTAgNet.com ❙ August 2018


http://www.WATTAgNet.com

Table of Contents for the Digital Edition of Poultry International - August 2018

Poultry International - August 2018
Contents
Editor’s Comment
News
5 top trends affecting chicken, egg production
How Cargill is growing its global poultry business
How chicken can support Sub-Saharan Africa’s growth
SPACE 2018 to address changes in agriculture
Egg sexing recognized at Good Farm Animal Welfare Awards
VIV China offers more opportunities in new location
Tackling cage-free layer housing air quality challenges
How to maximize manual chicken cutup, deboning yields
Products
Marketplace
Poultry International - August 2018 - CT1
Poultry International - August 2018 - CT2
Poultry International - August 2018 - Poultry International - August 2018
Poultry International - August 2018 - Cover2
Poultry International - August 2018 - Contents
Poultry International - August 2018 - Editor’s Comment
Poultry International - August 2018 - 3
Poultry International - August 2018 - 4
Poultry International - August 2018 - News
Poultry International - August 2018 - 5 top trends affecting chicken, egg production
Poultry International - August 2018 - 7
Poultry International - August 2018 - 8
Poultry International - August 2018 - 9
Poultry International - August 2018 - 10
Poultry International - August 2018 - 11
Poultry International - August 2018 - How Cargill is growing its global poultry business
Poultry International - August 2018 - 13
Poultry International - August 2018 - 14
Poultry International - August 2018 - 15
Poultry International - August 2018 - 16
Poultry International - August 2018 - 17
Poultry International - August 2018 - How chicken can support Sub-Saharan Africa’s growth
Poultry International - August 2018 - 19
Poultry International - August 2018 - 20
Poultry International - August 2018 - 21
Poultry International - August 2018 - SPACE 2018 to address changes in agriculture
Poultry International - August 2018 - 23
Poultry International - August 2018 - Egg sexing recognized at Good Farm Animal Welfare Awards
Poultry International - August 2018 - 25
Poultry International - August 2018 - 26
Poultry International - August 2018 - 27
Poultry International - August 2018 - 28
Poultry International - August 2018 - 29
Poultry International - August 2018 - VIV China offers more opportunities in new location
Poultry International - August 2018 - 31
Poultry International - August 2018 - Tackling cage-free layer housing air quality challenges
Poultry International - August 2018 - 33
Poultry International - August 2018 - 34
Poultry International - August 2018 - 35
Poultry International - August 2018 - 36
Poultry International - August 2018 - 37
Poultry International - August 2018 - 38
Poultry International - August 2018 - 39
Poultry International - August 2018 - How to maximize manual chicken cutup, deboning yields
Poultry International - August 2018 - 41
Poultry International - August 2018 - 42
Poultry International - August 2018 - 43
Poultry International - August 2018 - 44
Poultry International - August 2018 - 45
Poultry International - August 2018 - Products
Poultry International - August 2018 - Marketplace
Poultry International - August 2018 - 48
Poultry International - August 2018 - Cover3
Poultry International - August 2018 - Cover4
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