Characterization and dispersion modelling of odours from a piggery facilityCharacterization and dispersion modelling of odours from a piggery facility Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-11-122010enPiggeries are known for their nuisance odors, creating problems for workers and nearby residents. Chemical substances that contribute to these odors include sulfurous organic compounds, hydrogen sulfide, phenols and indoles, ammonia, volatile amines, and volatile fatty acids. In this work, daily mean concentrations of ammonia (NH3) and hydrogen sulfide (H2S) were measured by hand-held devices. Measurements were taken in several places within the facility (farrowing to finishing rooms). Hydrogen sulfide concentration was found to be 40 to 50 times higher than the human odor threshold value in the nursery and fattening room, resulting in strong nuisance odors. Ammonia concentrations ranged from 2 to 18 mL m(-3) and also contributed to the total odor nuisance. Emission data from various chambers of the pig farm were used with the dispersion model AERMOD to determine the odor nuisance caused due to the presence of H2S and NH3 to receptors at various distances from the facility. Because just a few seconds of exposure can cause an odor nuisance, a "peak-to-mean" ratio was used to predict the maximum odor concentrations. Several scenarios were examined using the modified AERMOD program, taking into account the complex terrain around the pig http://creativecommons.org/licenses/by/4.0/ Journal of Environmental Quality639 2170-2178 Lazaridis Michalis Λαζαριδης Μιχαλης Manolis Latos Christos Mpasiakos Petros Karageorgos Elefterios Chalarakis Charis Daskalakis Air--Pollution--Control Air contaminants Air pollutants Air pollution Air pollution control Air toxics Airborne pollutants Atmosphere--Pollution Contaminants, Air Control of air pollution Pollutants, Air Toxics, Air air pollution air pollution control air contaminants air pollutants air toxics airborne pollutants atmosphere pollution contaminants air control of air pollution pollutants air toxics air