title: Diurnal odor, ammonia, hydrogen sulfide, and carbon dioxide emission profiles of confined swine grower/finisher rooms.
abstract: The objective of this study was to obtain diurnal variation profiles of odor and gas (ammonia [NH3], hydrogen sulfide [H2S], carbon dioxide [CO2]) concentrations and emission rate (OGCER) from confined swine grower/ finisher rooms under three typical weather conditions (warm, mild, and cold weather) in a year. Two grower/ finisher rooms, one with a fully slatted floor and the other with partially slatted floors, were measured for 2 consecutive days under each weather condition. The results revealed that the diurnal OGCER in the room with a fully slatted floor was 9.2-39.4% higher than that with a partially slatted floor; however, no significant differences in the diurnal OGCER were found between these two rooms, except for the NH3 concentrations in August, the NH3 and H2S concentrations and emissions in October, and odor concentrations and emissions in February (p > 0.05). The OGCER variations presented different diurnal patterns as affected by time of day, season, type of floor, ventilation rate, animal growth cycles, in-house manure storage, and weather conditions. Significant diurnal fluctuations in the OGCER (except for the odor concentrations and H2S emissions) were observed in August (p < 0.05); all of the gas emissions in October and the CO2 concentrations and emissions in February also showed significant diurnal variations (p < 0.05). These significant diurnal variations indicated that the OGCER during different periods of a day should be monitored when quantifying OGCER concentrations and emissions; for example, source emission data used in air dispersion modeling to decrease the great incertitude of setback determination using randomly measured data.
authors.affiliation: Department of Agricultural and Biosystems Engineering, Iowa State University, Ames, IA, USA.
authors.forename: Gang
authors.initials: G
authors.lastname: Sun
authors.forename: Huiqing
authors.initials: H
authors.lastname: Guo
authors.forename: Jonathan
authors.initials: J
authors.lastname: Peterson
authors.forename: Bernardo
authors.initials: B
authors.lastname: Predicala
authors.forename: Claude
authors.initials: C
authors.lastname: Laguë
mesh_terms: D000395:Air Pollutants, Occupational / Q000032:analysis*; D000397:Air Pollution / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods*; D009930:Organic Chemicals / Q000032:analysis*; D013781:Texas; D014481:United States; D014484:United States Environmental Protection Agency; D014504:Urban Health
chemical_list: D000395:Air Pollutants, Occupational; D009930:Organic Chemicals