Expertise
Areas of application for our technologies
SynGas fuel gas module
The fuel gas module solution is aimed at power and cement plants that want to co-incinerate sewage sludge despite the recent ban on mixing sewage sludge ash with ash from other fuels (AbfKlärV). The SynGas fuel gas module produces synthesis gas from sewage sludge in a separate fluidised bed reactor, which can be fed to the power or cement plant as a gaseous substitute fuel.
The resulting sewage sludge ash is collected unmixed and, as with our other solutions, is available in the same, decontaminated and low-carbon quality for further utilisation or phosphorus recovery. Synthesis gas treatment upstream of the transfer point to the power plant can be adapted as required.
Advantages of the fuel gas module:
Technologies
- Efficient energy utilisation of sewage sludge energy
- Separation of material flows to fulfil the legal requirements for phosphorus recovery
- Utilisation of existing infrastructures, operating parameters and permits
- Possibility of sewage sludge drying using existing waste heat
- 20 years of expertise and experience in the field of automated SynGas generation
Sustainability
- Generation of an ignitable gas as an alternative to fossil fuels
- Reduction of CO2 emissions
- Conservation of resources
- Contribution to the circular economy through phosphorus recovery
- Minimisation of public investment in new mono-incineration plants
Economic efficiency
- Securing the long-term availability of the secondary fuel sewage sludge
- Securing income from sewage sludge acceptance

Sewage sludge with a dry content of 85% – 95%
Production of synthesis gas in a stationary fluidised bed at 870 °C
Discharge and cooling of the phosphorus-rich and virtually carbon-free ash granulate
Coarse dedusting of synthesis gas in the cyclone separator to increase the phosphorus yield
Transfer to the consumer and utilisation of the existing infrastructure for flue gas cleaning
Process description fuel gas module
Thermal treatment
1) Sewage sludge with a dry content of 85 – 95 %
2) Production of synthesis gas in a stationary fluidised bed at 870 °C
3) Discharge and cooling of the phosphorus-rich and almost carbon-free ash granulate
Synthesis gas purification and transfer
4) Coarse dedusting of synthesis gas in the cyclone separator to increase the phosphorus yield
5) Transfer to the consumer and utilisation of the existing infrastructure for flue gas cleaning
Flue gas cleaning
Flue gas cleaning takes place without any further changes to the existing process together with the exhaust gases from the power plant or cement works. The flue gas cleaning system may even be relieved, as the combustion of the syngas can be significantly cleaner than the combustion of the solid material.