Your choices so far:
1 Comfortable indoor climate; 2 Biomass (digestible sludge)
| What is your resource? | What do you want to deliver? | What is the service the customer wants? |
| 2 Biomass (digestible sludge) | District cooling | 1 Comfortable indoor climate |
| Biomass (fermentable sludge) | District heating | Electricity |
| Biomass (solid) | Electricity | Process cooling (< 0 °C) |
| Geothermal | Fuel: Gaseous | Process heat/steam (50 - 150 °C) |
| Sunshine | Fuel: Liquid | Process heat (150 - 1000 °C) |
| Water | Fuel: Solid | Process heat (> 1000 °C) |
| Wind | Local cooling (ind. house) | Transport |
| Residual oils/fats etc | Local heating (ind. house) |
This combination will fall apart into three different cases:
- A farm-scale digester where the gas is used in an internal combustion engine to provide heating and at least part of the electricity used at the farm itself.
- A large-scale (municipal) digester in direct conjunction with a CHP or tri-generation plant producing district heat, district cooling and electricity.
- A digester of any scale, upgrading the gas, injecting it into the European gas grid and hence making the gas available by contracting at any place.