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REDUCTION OF AMMONIA EMISSION FROM LIVESTOCK BUILDINGS BY THE OPTIMIZATION OF VENTILATION CONTROL

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

Citation:  Pp. 167-173 in Air Pollution from Agricultural Operations III, Proceedings of the 12-15 October 2003 Conference (Research Triangle Park, North Carolina USA), Publication Date 12 October 2003.  701P1403.(doi:10.13031/2013.15508)
Authors:   E, Vranken, S, Claes, and D. Berckmans
Keywords:   Ammonia emission, Reduction strategies, Dynamic modeling, Ventilation control

There is evidence from literature and field data analysis that the ammonia emission from livestock buildings is highly correlated with ventilation rate and indoor temperature. These findings demonstrate the potentials of ammonia emission reduction by means of ventilation control strategies.

High frequent data from field measurements in mechanically ventilated commercial pig and poultry houses in Belgium were used to optimize and validate a mechanistic ammonia emission model. This model allowed calculating the dynamic changes of ammonia emission over a whole year by using input data of outdoor temperature obtained from a dynamic reference year.

In this study climate control settings, such as optimal temperature, proportional band, minimal and maximal ventilation rate were optimized as a function of outdoor temperature and animal weight, in order to reduce ammonia emission from mechanically ventilated pig and poultry houses by appropriate ventilation rate control.

Simulation on new ventilation control settings showed a possible reduction of NH3-emission of 8% on yearly bases. Such reduction strategies without any additional costs highly increase the economical potentials of pig farms in contrast to feeding and building strategies that mostly do not suffice on their own to satisfy the new environmental (Download PDF)    (Export to EndNotes)