Emission factors for pigs for modelling and reporting
The emission factors below should be used for carrying out ammonia assessments and for calculating your emissions for the Emissions Inventory reporting.
These factors are subject to change as further information becomes available, only the emission factors on the website at the time of your application will be considered valid.
Ammonia from pig housing
Emission factors are kilograms of ammonia (kg NH3) per animal place per year.
Sows (includes gilts)
|
Housing type |
Kilograms of ammonia (kg NH3) per animal place per year |
|
Fully slatted floor |
2.94 |
|
Solid floor straw system |
3.29 |
|
Partially slatted floor with reduced manure pit |
2.06 |
|
Fully slatted floor with frequent slurry removal (a minimum of once weekly removal achieved through scraping, pumping or flushing) |
2.21 |
|
Outdoors |
2.67 |
Farrowers (includes piglets)
|
Housing type |
Kilograms of ammonia (kg NH3) per animal place per year |
|
Fully slatted floor |
4.62 |
|
Solid floor straw system |
5.41 |
|
Free farrowing |
5.41 |
|
Fully or part slatted floor with combination of water and manure channel |
3.23 |
|
Outdoors |
4.48 |
Pigs 7 – 30 kg
|
Housing type |
Kilograms of ammonia (kg NH3) per animal place per year |
|
Fully slatted floor (slurry system) |
0.443 |
|
Fully slatted floor with frequent slurry removal, minimum of weekly |
0.332 |
|
Solid floor straw system |
0.254 |
|
Part slatted floor with reduced manure pit |
0.332 |
|
Outdoors |
0.858 |
Pigs >30 kg
|
Housing |
Kilograms of ammonia (kg NH3) per animal place per year |
|
Fully slatted floor (slurry system) |
2.813 |
|
Fully slatted floor with frequent slurry removal, minimum of weekly |
2.11 |
|
Solid floor, straw system |
1.888 |
|
Part slatted floor with reduced manure pit |
2.11 |
|
Outdoors |
2.408 |
Ammonia - pig manure and slurry storage
| Manure storage | Kg NH3 / tonne fresh manure |
|---|---|
|
Manure heap |
1.49 |
|
Slurry storage |
Kg NH3 / m2 |
| Circular store no cover | 1.4 |
| Circular store rigid cover | 0.28 |
| Circular store floating cover | 0.7 |
| Circular store low tech cover | 1.05 |
| Lagoon no cover | 1.4 |
| Lagoon rigid cover | 0.28 |
| Lagoon floating cover | 0.56 |
| Lagoon low tech cover | 0.84 |
Methane emission factors for pigs
| Description | Enteric fermentation (Kilograms of methane per animal place per year) | Manure management (Kilograms of methane per animal place per year) |
|---|---|---|
| Pigs | 1.5 | 3 |