AMMONIA AND GREENHOUSE GAS EMISSIONS IN PIG FATTENING ON SLATTED FLOOR WITH EXCREMENT DISCHARGE BY FLAT SCRAPING

Solène Lagadec (1) , Brigitte Landrain (1) , Paul Landrain (1) , Paul Robin (2) , Mélynda Hassouna (2)

1 Chambre Régionale d'Agriculture de Bretagne
2 SAS - Sol Agro et hydrosystème Spatialisation

Gas emissions (NH 3 GHG) from four pig fattening rooms on slatted flooring with flat scraping and under-floor air evac uation were measured in three consecutive batches between May 2009 and June 2010 i n the experimental station of Crecom (France). Gas concentrations and ventilation rates were measured and recorded during 3 periods of 14 days during the bre eding period (day 7 to 21, 35 to 49 and 63 to 77). Gas concentrations were measured with a n infrared photoacoustic monitor (INNOVA 1412) in the room area. Manure was scrap ed once a day and stored in the breeding rooms for two weeks. Measured carbon emissions (C-CH 4 and C-CO 2 ) were validated by comparison with the C mass balanc e deficit, whereas measured nitrogen emissions (N- NH 3 and N-N 2 O) were not validated by comparison with the N mass balance deficit. Observed differences between measurement and mass balance deficits were explained by the samplin g point site for concentration measurements that was not representative of the exha ust air. With additional experiments, we demonstrated that ammonia concentrat ions measured in the exhausted air were 51 % higher than those measured in the room. Under-floor air evacuation combined with a flat scraper system enabl ed the reduction of ammonia concentrations in the room and improved air quality and the working environment. However, compared to a slurry storage system, a flat scraper system with manure stored in the room after scraping, reduces GHG emiss ions (N 2 O and CH 4 ) in the exhaust air, but can increase NH 3 emissions.

Domaines: Sciences du Vivant [q-bio]

Solène Lagadec, Brigitte Landrain, Paul Landrain, Paul Robin, Mélynda Hassouna. AMMONIA AND GREENHOUSE GAS EMISSIONS IN PIG FATTENING ON SLATTED FLOOR WITH EXCREMENT DISCHARGE BY FLAT SCRAPING. Emissions of gas and dust from livestock, IFIP - Institut du Porc, 2013. ⟨hal-01461136⟩