Aalborg Energie Technik a/s - Biomass Cogeneration Plant

Østkraft, Rønne, Denmark


Østkraft supplies power and district heating to the population of Bornholm. The boiler (Block 6) was built in 1996 and was built from the start with the possibility of using 20% biomass in the combustion process. Østkraft decided in 2013 to convert the plant in order to be able to use 100% biomass, without losing the flexibility and possibility of utilising coal and oil, if necessary. This flexibility is essential, as Østkraft is situated on an island. The plant must be ready to start the oilburners quickly in case the power cable to Sweden should get damaged.


The plant has been retrofitted in autumn 2016 with AET Combi Spreaders.


AET's Retrofitting Included:

  • Feasibility study

  • AET fuel dosing and transport system

  • AET combi-spreaders (coal and/or biomass)

  • Boiler refurbish of furnace

  • Upgrade of secondary air system

  • AET dust firing system

  • Instrumentation

  • Erection of equipment

  • Commissioning


Questions? Need detailed information?

To obtain more information about this biomass plant and/or generally about AET:


Contact AET sales here


Boiler: 106/74/54 MWfuel heat input
  88 bara


37 MWe

Process energy:  

35 MWdistrict heating

The CHP plant Østkraft was converted to be able to use 100% biomass in 2016.

Zignago Power s.r.l.–successfully producing Green Energy in Italy
The 49 MW Zignago Biomass power plant in Italy, owned and managed by Zignago Power s.r.l., belonging to the Marzotto family empire, has since its installation in 2013 been running with a very high availability (98,8%). The plant utilises wood residues and agricultural waste such as straw, mischantus and maize. >Read more
Zignago Power s.r.l.–successfully producing Green Energy in Italy
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  • Aalborg Energie Technik a/s
  • Alfred Nobels Vej 21 F
  • 9220 Aalborg East, Denmark
  • Tel +45 96 32 86 00
  • aet@aet-biomass.com