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Biogas Utilisation
There are multiple options for gas use:
- Combined Heat & Power (CHP)
- Heat
- Biogas
- Bio-methane
- Other
Option 1 - CHP:
- Most used for large scale digestion
- Production of electricity and process heat – Heat for own use
- Electricity partly for own use, partly sold
- For small scale heat valorisation is difficult
- Electricity feed-in is subsidised money
Pros:
- Simple technique
- Proven technology
- Easy offset of energy
- Heat for free on farm
Cons:
- Only electricity
- If electricity price drops, BC drops
- Difficult heat valorisation
- Low energy efficiency
Option 2 - Heat:
Heat production by boilers or CHP Heat delivery to:
- On farm processes
- District heating
- Industry
- Swimming pool, etc
Option 3 - Biogas:
Direct sales of (un-treated) biogas Transport via:
- Biogas grid
- Biogas tank transport
Delivery to:
- Industry
- Swimming pools
- District heating
In most countries biogas sales not subsidized:
- Option with satellite CHP
- Selling of the heat
- Lobby for subsidy scheme for raw biogas
Pros:
- No upgrading needed
- No CHP needed
- Proven technology
- High energy efficiency
- Low maintenance costs
- Possible at longer distances
Cons:
- Biogas often not subsidized
- Depended of end user(s)
- New infrastructure needed
Option 4 - Bio-methan:
Sales of bio methane as:
Natural gas substitute
- Grid injection
Transport fuel
- Feed-in in natural gas grid
- Selling via tank station
- Off set with tank transport