A dynamic model of ammonia emission and concentration in fattening pig buildings
Résumé
The control of gas emissions from livestock buildings, especially ammonia, is important to limit the environmental impact, which depends primarily on the cumulated emission, and to improve the welfare and health of the animals and the stockmen, are affected by gas concentration inside the building. The model developed in this work aims at integrating the information and models already available in the literature in order to predict the ammonia emission and concentration inside the fattening rooms and in the exhausted air. The model includes the description of
animals and feeding, housing and indoor climate, and processes involved in ammonia emission. Different housing designs are considered in the model including different types of slatted floors and ventilation systems. The effect of outdoor climate, including seasonal and diurnal variations, is also taken into account. The model predicts the indoor climate and the emission and concentration of ammonia. A sensitivity analysis has been performed in order to evaluate the effects of season, type of ventilation, and type and cleanliness of floor. These simulations indicated that ammonia emission and concentration are not well correlated and are highly dependant on the ventilation system and the temperature. The model was validated by comparison with ammonia concentration available from the literature, with different types of ventilation and slatted floor, and different indoor temperatures.
Domaines
Sciences du Vivant [q-bio]
Origine : Fichiers produits par l'(les) auteur(s)