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Last update: 06/03/2020

SYNCOM process

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The limit values for emissions applicable to Waste-to-Energy plants are more stringent than those applying to any other type of industrial plant. Nevertheless, the trend to further minimize pollutant emissions is continuing. At MARTIN, this led to the development of the SYNCOM process, which makes use of the following components:

  • grate-based system using the reverse-acting grate
  • oxygen enrichment of underfire air
  • combustion control system using infrared (IR) thermography
  • overfire air system with 4 nozzle rows - "4-row stitching"
  • flue gas recirculation

Flue gas recirculation and, above all, oxygen enrichment of the underfire air substantially reduce the flue gas flow. This results in cost savings as smaller components can be used in the steam boiler and flue gas cleaning system. Also, pollutant burdens at the stack are significantly reduced.


The complex combustion control system, which makes use of IR thermography, and the adjusted overfire air injection system ensure that the combustion process is optimized. Organic components are destroyed in a much more efficient manner. Fuel bed temperatures are significantly higher than those in conventional plants and lead to partial sintering of the bottom ash. Bottom ash burnout and heavy metal leaching are significantly improved as a result.


Comprehensive tests were performed at the Coburg Waste-to-Energy plant to test the SYNCOM process. Following this, the first commercial plant was built in Arnoldstein, Austria. Since the second half of 2004, this plant has been operating successfully on a continuous basis. In Sendai, Japan, a further plant started operating in 2005.


Highlights of the SYNCOM process:


  • more intense, more uniform combustion
  • significantly reduced CO content in the flue gas
  • temperature in the fuel bed in the main combustion zone approx. 100 °C higher
  • partial sintering of the bottom ash and consequently
    • improved burnout
    • less leaching of heavy metals
  • flue gas flow reduced by approx. 35 %
    • higher boiler efficiency
    • reduced pollutant burden at stack
    • reduced fly ash flow