Table 1 Differences in stillage processing in the scenarios investigated
Scenario | Washing and drying | Pellet production | Biogas upgrading | Turbine system | Burnt in CHP (besides sludge) | Co-products* | DH |
|---|---|---|---|---|---|---|---|
Reference | Yes | Part of sfrac of stillage (dried) | No | HP | Part of sfrac of stillage, syrup, bg | Pellets | No |
A1 | Yes | Part of SF | Yes | HP | Part of SF, tail gas | Up bg, pellets | No |
A2 | Yes | TA of SF | No | HP-LP | Bg | Pellets | Yes |
A3 | No | - | Yes | HP-LP | Sfrac of stillage, tail gas | Up bg | Yes |
A4 | No | - | No | HP-LP | Sfrac of stillage, bg | - | Yes |
B | - | - | Yes | HP-LP | Sfrac of eff, tail gas | Up bg | Yes |