Table 18.
Life cycle inventory for producing 1 kg of biomethane from mud.
| Stream | Kind of stream | Unit | Value | Ecoinvent 3.4 |
|---|---|---|---|---|
| Mud | Input | kg | 13.6863 | Table 9 |
| Water | Input | kg | 218.938 | Water, unspecified natural origin, CO |
| Air | Input | m3 | 0.3668 | Market for compressed air, 600 kPa gauge |compressed air, 600 kPa gauge| APOS, S – GLO |
| Energy | Input | MJ | 4.1234 | Table 12 |
| Cooling water | Input | kg | 234.53 | Water, cooling, unspecified natural origin, CO |
| Carbon dioxide | Emission to air | kg | 1.7255 | Carbon dioxide, non-fossil, emission to air, unspecified |
| Methane | Emission to air | kg | 0.0562 | Methane, non-fossil, emission to air, unspecified |
| Ammonia | Emission to air | kg | 0.0047 | Ammonia, emission to air, unspecified |
| Water | Emission to air | kg | 0.0849 | Water vapour, emission to air, unspecified |
| Oxygen | Emission to air | kg | 0.7565 | Oxygen, in air, emission to air, unspecified |
| Nitrogen | Emission to air | kg | 2.4948 | Nitrogen, emission to air, unspecified |
| Carbon dioxide | Emission to water | kg | 2.03E-13 | Carbon dioxide, emission to water, fresh water |
| Methane | Emission to water | kg | 1.11E-29 | Methane, emission to water, unspecified |
| Ammonia | Emission to water | kg | 0.0024 | Ammonia, emission to water, unspecified |
| Water | Emission to water | kg | 9.6253 | Water, emission to water, unspecified |
| Nitrogen | Emission to water | kg | 0.0001 | Nitrogen, emission to water, unspecified |
| Digestate | Output | kg | 42.2517 | Avoided product as ammonium nitrate |