Your choices:
1 Biomass (fermentable sludge); 2 Process heat; 3 Fuel: liquid
| What is your resource? | What do you want to deliver? | What is the service the customer wants? |
| Biomass (digestible sludge) | District cooling | Comfortable indoor climate |
| 1 Biomass (fermentable sludge) | District heating | Electricity |
| Biomass (solid) | Electricity | Process cooling (< 0 °C) |
| Geothermal | Fuel: Gaseous | 2 Process heat/steam (50 - 150 °C) |
| Sunshine | 3 Fuel: Liquid | 2 Process heat (150 - 1000 °C) |
| Water | Fuel: Solid | 2 Process heat (> 1000 °C) |
| Wind | Local cooling (ind. house) | Transport |
| Residual oils/fats etc | Local heating (ind. house) |
To be viable as a fuel for high-temperature processes, the alcohol produced must already be distilled and opposed to what was the case with biogas it will be physically transported to the industrial site for use.
Hence; if the main energy service to be met is to deliver process heat and if the resource is a fermentable biomass residue, there will be no specific option to also deliver fuel to other customers – unless of course there is an over-capacity at the distillation plant.