American Society of Agricultural and Biological Engineers



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EMPIRICAL MODELS TO DETERMINE AMMONIA CONCENTRATIONS FROM BROILER CHICKEN LITTER

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

Citation:  Transactions of the ASAE. 33(4): 1337-1342. (doi: 10.13031/2013.31478) @1990
Authors:   L. E. Carr, F. W. Wheaton, L. W. Douglass
Keywords:    Model, Ammonia, Broiler litter. Air quality

ABSTRACT Volatilization of ammonia from poultry litter in broiler houses creates potential health hazards for the house operator and the birds. This problem was addressed by defining atmospheric ammonia concentrations from broiler litter as a function of environmental variables. Nine chambers, each 1.37 m^ in volume, were constructed and positioned in a common room. Air temperature and relative humidity in the common room were controllable. Air flow (i.e., ventilation) rates through each chamber and the litter moisture content in each chamber were also controllable. An attempt to control litter pH was not successful. Using a second-order central composite rotatable statistical design, data were collected from the small chambers that allowed both litter pH and ammonia volatilization rate to be expressed as a function of litter moisture content, ventilation rate, and air relative humidity and temperature. Response surfaces developed from this data are presented.

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