Prototype to reduce ammonia emissions from pigs houses with recovery as fertilizers

Ammonia emissions into the atmosphere from the intensive pig housing is due to surfaces fouling caused by feces and urine and the presence of slurry under the slatted floor. The GO aim is to develop a prototype that captures ammonia and dusts from pigs houses to reduce emissions to the atmosphere, while promoting animal welfare and workers health. The system draws air from the rooms and remove ammonia and dust capturing them in a solution of ammonium sulphate. This can be exploited by mixing it with the solid fraction from theslurry solid-liquid separation, in order to reduce its ammonia and greenhouse gases emissions and to increase its nitrogen content in the perspective of "nutrient recovery".
Results expected are the improve of air quality inside the room where the prototype is installed and the quantification of ammonia emissions avoided; the characterization for fertilizers purposes and quantification of the reduction of the ammonia, nitrous oxide and methane emissions from heap storage of the separated solid fraction from pig slurry treated with the ammonium sulphate solution produced by the prototype. Finally, the evaluation of cost-benefits from the new technology application analyzing its impact on the production cost per kg of live pig weight.