Heat exchangers for biogas plants
Substrate heat exchangers
OptiHeat Substrate Heat Exchanger (WT-SWT-OH)
Pumping, grinding, heating – the turnkey OptiHeat product bundle in a container
The digestion temperature is crucial to the performance of a biogas plant. Many plants struggle with fluctuating temperatures, particularly during the winter months, or are unable to make optimal use of substrates that are difficult to digest due to technical limitations.
With OptiHeat, our containerised product bundle, Biogastechnik Su00fcd GmbH offers a high-performance solution for thermal substrate optimisation. This substrate treatment system combines the advantages of the HeatCrack heat exchanger with a Vogelsang RotaCut wet shredder, to process substrates efficiently and maximise biogas production.
Thanks to intelligent heat utilisation, mechanical substrate preparation and sophisticated pump technology from Wangen Pumpen, gas yield is increased, process stability is improved and the digestion of even difficult substrates is optimised – without the need for major modifications or control system adjustments.
Applications:
OptiHeat can be integrated at various stages of the biogas process:
- Option 1 – Maintain/increase temperature
- Heat transfer: 30 – 50 kW
- Extraction: Fermenter/post-fermenter
- Recirculation: Fermenter/post-fermenter
- Option 2 – Heating the slurry storage tank
- Heat transfer: 30 – 50 kW
- Extraction: Fermenter/post-fermenter (end of the biological process)
- Recirculation: Digested sludge storage
- Variant 3 – Preheating
- Heat transfer: 50 – 70 kW
- Extraction: Pre-digester
- Recirculation: Fermenter (start of the biological process)
Advantages
Optiheat
- Maximum fermenter efficiency
Fermentation temperature remains stable, even in winter.
- Higher gas production
Improved degradation rate through mechanical substrate preparation.
- Lower heating costs
Efficient heat recovery reduces energy consumption.
- Tried-and-tested technology with low maintenance and running costs
Successfully in use in biogas plants for over 20 years.
- Turnkey product bundle in a container
Consisting of the HeatCrack heat exchanger, a RotaCut wet shredder from Vogelsang, a pump from Wangen Pumpen and a control system.
- Pump protection via an integrated foreign object separator
Prevents damage and blockages, ensuring reliable operation.
- Flexible for use with various substrates
Ideal for slurry, manure, silage and fibre-rich materials.
- Process stability for improved biological activity
Constant temperatures in the fermenter – ideal for microorganisms.
- Combines perfectly with our separation technology
Complements Sepogant and Returgant perfectly for cost-effective substrate processing.
