SynGas Fuelgas Module


The solution of the fuel gas module 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 – Germany). With the SynGas fuel gas module, synthesis gas is produced from sewage sludge in a separate fluidized 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 recycling or phosphorus recovery. Synthesis gas treatment before the transfer point to the power plant can be adapted as required.



  • Efficient energetic use of sewage sludge energy
  • Separation of material flows to meet legal requirements for phosphorus recovery
  • Utilization of existing infrastructures, operating parameters and permits
  • Possibility of sewage sludge drying using existing waste heat
  • 20 years of competence and experience in the field of automated synthesis gas generation


  • 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


  • Long-term securing of the availability of the secondary fuel sewage sludge
  • Securing revenue from sewage sludge acceptance

Process description fuel gas module

Thermal treatment
1) Sewage sludge with a dry content of 85 – 95%.
2) Generation 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 scrubbing and transfer
4) Coarse dedusting of synthesis gas in the cyclone to increase the phosphorus yield
5) Transfer to the consumer and use of existing flue gas cleaning infrastructure

Flue Gas Cleaning

Flue gas cleaning takes place together with the exhaust gases from the power or cement plant without any further modification in the existing process. The flue gas cleaning system may even be relieved, since the combustion of the synthesis gas can be much cleaner than the combustion of the solid material.