Your choices:
1 Biomass (digestible sludge); 2 Process heat; 3 District heating
| What is your resource? | What do you want to deliver? | What is the service the customer wants? |
| 1 Biomass (digestible sludge) | District cooling | Comfortable indoor climate |
| Biomass (fermentable sludge) | 3 District heating | Electricity |
| Biomass (solid) | Electricity | Process cooling (< 0 °C) |
| Geothermal | Fuel: Gaseous | 2 Process heat/steam (50 - 150 °C) |
| Sunshine | 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) |
A very common situation is that process industries do produce a lot of low-temperature waste heat.
From a system point of view it is important that the municipality where the industrial company is situated initiates a dialogue with the company about the possibilities to recover this heat and use it for district heating.
This situation is not at all affected by the fact that the energy source for the industrial, high-temperature processes may be biogas from the municipal wastewater treatment plant, but while the negotiations about delivery of the biogas to the industrial site are on-going, the question about heat recovery should be raised at the same time.