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Last update: 06/03/2020



Landfilling of untreated municipal waste is prohibited in many countries. In general, waste combustion has emerged as an alternative form of waste treatment. The political goal of "landfill-free" waste management has also been promulgated, i.e. maximum recycling of the residue products of waste combustion, in particular bottom ash and fly ash. Residues must qualify as inert material in conformity with EU Directive 1999/31/EC in order to be returned to the material cycle.


The aim of the SYNCOM-Plus process is to help meet this requirement. The process is based on waste combustion using a proven, grate-based system with oxygen enrichment of the underfire air (SYNCOM process). This produces temperatures in excess of 1150 °C in the fuel bed which cause sintering of the bottom ash. To ensure that the quality of the inert material is acceptable, it is also essential to separate the bottom ash fine fraction from the sintered granulate and to return it, together with part of the fly ash, to the combustion process. Sintering of these ash constituents then takes place when they again pass through the main combustion zone.


The components of the SYNCOM-Plus process were tested in various steps. Trials at the plant in Arnoldstein, Austria where the SYNCOM-process is in successful commercial operation since 2004, have been finalized in the 2nd half of 2006. SYNCOM-Plus is ready for introduction into the market.


Highlights of the SYNCOM-Plus process:

  • Grate-based system using the reverse-acting grate
  • Reduction of flue gas flow by 35 % and a correspondingly lower pollutant burden
  • Dioxin destruction > 90 %
  • Granulate product with loss on ignition < 0.1 % and inert material quality in conformity with
  • EU Directive 1999/31/EC
  • No need for waste pre-treatment
  • No need for vitrification of residues
  • Net power output > 500 kWh/t waste