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Top layer humidification of bedding material of laying hen houses to mitigate dust emissions: effects of water spraying on dust, ammonia and odor emissions

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2012 IX International Livestock Environment Symposium (ILES IX)  ILES12-0528.(doi:10.13031/2013.41632)
Authors:   Nico Ogink, Jan van Harn, Rick van Emous, Hilko Ellen
Keywords:   PM, emissions, mitigation, behavior, poultry

The objective of this study was to investigate spraying different doses of water on the litter of two aviary housing system of laying hens, and determine the effects on emissions of fine dust, ammonia and odor. The study was performed in eight climate separated rooms of an experimental farm. Four of the eight rooms were equipped with an aviary system with non-integrated nestboxes, the other four with a portal aviary system, rooms housing 604-620 hens. The following treatments were studied in terms of daily water dosing and frequency of daily application : 0 ml m-2 reference, 150 ml m-2 (2 x 75 ml), 300 ml m-2 (2 x 150 ml), and 600 ml m-2 (2 x 300 ml). Each treatment was replicated once per aviary system. Mean emissions and reductions of PM10, PM2.5 and ammonia were measured on days 19, 26 and 33, and odor on day 26 of the experimental period. Spraying 150, 300 and 600 ml m-2 resulted in a reduction of PM10 and PM2.5 emissions of 18% and 44%, 48 and 59%, 64% and 64% respectively. However spraying 150, 300 and 600 ml m-2 water resulted in an increase of ammonia emission by 21%, 65% and 64% (linear dosing effect P<0.05), and an indicative increase of odor emission. The reduced litter quality had no adverse effect on behaviour and production of hens. It is concluded that the investigated principle can be effective to reduce fine dust emissions if the increase of the ammonia emission can be reduced.

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