Daytime Odor Emission Variations from Various Swine Barns

Abstract

The objective of this study was to reveal the daytime variations in odor concentrations and emission rates from different types of swine barns located in Saskatchewan, Canada. Odor emissions from a gestation room, a nursery room, and a finishing room were measured in July, while a farrowing room was measured in September. Each room was measured for two consecutive days from 0600 to 2000 h. Large daytime variations in odor concentrations and emission rates were observed in all four types of rooms. Hence, it is unlikely that a representative odor concentration and emission rate (i.e., a daily mean) can be obtained using a snapshot measurement. Odor and gas concentrations are likely to be high in the early morning and late afternoon, but the odor emission rate did not exhibit a certain pattern. Odor and NH 3 concentrations and emissions were affected by animal activities, whereas CO 2 concentration was mainly affected by the ventilation rate. However, statistical analysis indicated that there were no significant differences among different periods of the day in odor or NH 3 emission rates for each room (P > 0.05). The nursery room had the highest odor concentration and emission rate, followed by the finishing, farrowing, and gestation rooms. No correlation was found between odor or gas concentration or emission rates and room or ambient temperature or ventilation rate, except for the odor emission rate of the farrowing room, which was significantly affected by the ventilation rate (P < 0.05).

The Impact of Microclimate Parameters on Odour Emissions from Pig Production in Spring

“…Zhou and Zhang [22] measured odour concentration and emission in ten pig houses for dry-sows, farrows and they also observed the relation between temperature and odour concentration. In other study, Guo et al [23] analysed the diurnal variations of odour concentration in fully-slatted fattening houses. They observed no relationship between the concentration of odours and the air temperature, and ventilation rate.…”

Determining tolerance to odour annoyance in communities near hog operations.

“…All pig barns and manure storages within a farm were combined as one equivalent area source from which odour was emitted. The odour emission rates were calculated from the reported emission data in the literature (Guo et al 2006b;Guo et al 2007;Zhang et al 2007;Feddes 2006;Wang 2007;Zhou and Zhang 2003;Sun et al 2008), whilst taking into account the following parameters: type of hog operations, manure storage system, ventilation system, and odour control factors due to any applied odour abatement technologies. The recorded GPS coordinates of each surveyed household were transferred to Cartesian coordinates with the origin at the farm.…”