| Hardcopy Reference: |
HH-10-07-258 |
| Title: |
A dispersion modelling approach to determining the odour impact of intensive pig production units in Ireland |
| Author(s): |
B.A. Sheridan, E.T. Hayes, T.P. Curran , V.A. Dodd |
| Publication Year: |
2004 |
| Reference: |
Bioresource Technology 91 (2004) 145–152 |
| Country: |
Ireland |
| Summary: |
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| Abstract: |
It is becoming more common now to use atmospheric dispersion models to predict where odour nuisance is likely to occur near pig units. An odour threshold concentration of 1 OuE m3 is the level at which an odour is detectable by 50% of screened panellists. A new odour annoyance criterion (C98;1-h (98%-ile, 1-h average odour concentration) 64.3 OuE m3) was developed in this study and compared to the Environmental Protection Agency (EPA) (Ireland) recommendation (C98;1-h 66 OuE m3) using the ISCST3 model with data from three meteorological stations. Abatement techniques such as exhaust vent modification, feed manipulation, and biofiltration were assessed. Based on current limits (C98;1-h 66 OuE m3) for existing facilities, predicted setback distances can be up to 780 m for a 1000-sow unit, depending on which meteorological data set is used. However, if using the suggested odour impact
criterion in this research (C98;1-h 64:3 OuE m3), setback distances could reach a maximum of 1000 m. Biofilters on second stage weaning and finishing pig buildings offer the greatest single reduction (up to 650 m) in odour impact. When combined with feed manipulation and increased exhaust air velocity, the figure can be as high as 920 m. Due to the critical requirement for local
meteorological data, it is recommended that a meteorological station be installed on large pig units to facilitate more accurate predictions. Site measurements of odour emissions should be made in each case because emissions are influenced by a range of local factors including feed, manure management, building design and operation. |
| Database: |
Environment |
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