Division Typical and default values – biomethane - mixtures of manure and maize: greenhouse gas emissions with shares given on a fresh mass basis
United Kingdom
| Biomethane production system | Technological options | Typical value | Default value |
|---|---|---|---|
| (g CO2eq/MJ) | (g CO2eq/MJ) | ||
| Manure – Maize 80 % - 20 % | Open digestate, no off-gas combustion | 32 | 57 |
| Open digestate, off-gas combustion | 17 | 36 | |
| Close digestate, no off-gas combustion | – 1 | 9 | |
| Close digestate, off-gas combustion | – 16 | – 12 | |
| Manure – Maize 70 % - 30 % | Open digestate, no off-gas combustion | 41 | 62 |
| Open digestate, off-gas combustion | 26 | 41 | |
| Close digestate, no off-gas combustion | 13 | 22 | |
| Close digestate, off-gas combustion | – 2 | 1 | |
| Manure – Maize 60 % - 40 % | Open digestate, no off-gas combustion | 46 | 66 |
| Open digestate, off-gas combustion | 31 | 45 | |
| Close digestate, no off-gas combustion | 22 | 31 | |
| Close digestate, off-gas combustion | 7 | 10 |
Where biomethane is used as Compressed Biomethane as a transport fuel, a value of 3,3 g CO2eq/MJ biomethane needs to be added to the typical values and a value of 4,6 g CO2eq/MJ biomethane to the default values.
Notes on Division D
Footnotes
- f1
-
This group of materials includes agricultural residues with a low bulk density and it comprises materials such as straw bales, oat hulls, rice husks and sugar cane bagasse bales (not exhaustive list).
- f2
-
The group of agricultural residues with higher bulk density includes materials such as corn cobs, nut shells, soybean hulls, palm kernel shells (not exhaustive list).