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 - pig housing

Housing type Ammonia Emission Factor (kg NH3/animal place/year)

Sows 

 

Fully slatted floor (FSF)

3.01

Solid floor straw system

4.57

Part slatted floor (PSF) with reduced manure pit

2.41

FSF with vacuum system for frequent slurry removal

2.26

Farrowers 

 

Fully slatted floor (FSF)

5.84

Solid floor straw system

8.88

FSF/PSF with combination of water and manure channel

2.80

FSF/PSF with flushing system with manure gutters

2.34

FSF/PSF with manure pan underneath

2.04

Weaners 

 

Fully slatted floor (FSF)

0.29

Solid floor straw system

0.21

Pen/ Flatdeck with FSF/PSF with vacuum system for frequent slurry removal

0.22

Pen/ Flatdeck with FSF beneath where there is concrete sloped floor to separate faeces or urine

0.20

Pen with PSF (2 climate system)

0.19

Pen with PSF and sloped or convex solid floor

0.17

Pen with PSF with triangular slats and manure channel with sloped side walls

0.08

Growers 

 

Fully slatted floor (FSF)

1.59

Solid floor straw system

1.14

FSF with vacuum system for frequent slurry removal

1.19

PSF with reduced manure pit including slanted walls and vacuum system

0.64

PSF with central convex solid floor at front and manure gutters with slanted sidewalls and sloped manure pit

0.64

Finishers 

 

Fully slatted floor (FSF)

4.14

Solid floor straw system

2.97

FSF with vacuum system for frequent slurry removal

3.11

PSF with reduced manure pit including slanted walls and vacuum system

1.66

PSF with central convex solid floor at front and manure gutters with slanted sidewalls and sloped manure pit

1.66

 

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
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