A study on air flow and odor emission rate from a simplified manure storage tank

Emission rates of odorous compounds from pig slurries

“…Emission rates from slurries may be a †ected by wind speed (Liu et al 1995), stirring and temperature. In other experiments, increasing stirring rate increased emission of odorants (unpublished data) although Cumby et al (1995) found that ammonia emission rates decreased with stirring.…”

Modeling Receptor Odor Exposure from Swine Production Sources Using CAM

“…The lowest emission was associated with night conditions (U = 4.4 m/s) with the highest emission associated with daytime conditions (U = 7.3 m/s). Liu (1994) conducted a detailed computation fluid dynamics (CFD) two-dimensional scale-model study of the odor emission from above-ground area sources as a function of slurry depth (h) and D/H ratios between 0.6 and 2.0. The predicted volumetric rate leaving the scale model storage (V storage, AGAS ) agreed very well with scale-model observations.…”

“…The CFD developed summary was used to predict the field observations from Li et al (1994) resulting in CFD predictions in agreement with the range of observed emissions (1 × 10 4 to 1 × 10 5 OU m 3 /s range). The scale-model experimental comparison along with the field observation comparisons from Li et al (1994) gave confidence to the Liu (1994) procedure and therefore was adopted in CAM. For the volumetric rate leaving an above-ground storage a relationship was developed based on Liu's (1994) CFD predictions.…”

“…The scale-model experimental comparison along with the field observation comparisons from Li et al (1994) gave confidence to the Liu (1994) procedure and therefore was adopted in CAM. For the volumetric rate leaving an above-ground storage a relationship was developed based on Liu's (1994) CFD predictions. This factor, called here the above-ground emission factor (AGEF; fig.…”

“…The building ventilation and area source (ground and above-ground) odor emission rates were determined by multiplying the estimated source volumetric rate (m 3 /s; V Building or V Storage, GLAS, or V Storage, AGAS ) by the associated source odor concentration (OU/m 3 Building or OU/m 3 Storage, GLAS or OU/m 3 Storage, AGAS ). Source odor concentration data from building ventilation air, from the downwind berm for ground-level area sources, and from the slurry surface [as required for the Liu (1994) procedure] was sought to fulfill these requirements.…”