Aalborg Energie Technik a/s Biomass Cogeneration Plant

ENGIE Cofely, BES VSG, France

DRT, a world leader in the development of resin and turpentine extracted from pine resin, receives steam from the Biomass Energy Solutions VSG (BES-VSG) plant.

The cogeneration plant is owned by a special project vehicle (SPV), which was created by DRT, ENGIE Cofely and Caisse des Dépôts. These partners have financed, built and now operates the cogeneration plant for a minimum of 20 years, utilising local biomass.


The plant produces 97 GWh of electricity/year and 214 GWh of steam/year without using fossil fuels. This reduces CO2 emissions by 90,000 tonnes/year as the plant efficiency will be more than 60%.


The biomass-fired cogeneration plant has an annual fuel input of 150,000 tonnes of forestry wood, and uncontaminated residues from wood processing and DerTal. DerTal is a tall-oil and by-product from DRT.


Performance test

The performance of the boiler was successfully tested by Bureau Veritas in 2015:

  • Boiler efficiency: 93.3%
  • In-house power consumption: only 1.6% of fuel heat input.
  • Emissions well within stringent, French standards.

The plant was completed and commissioned in 2015.


AET designed, supplied, constructed and commissioned the following scope:

  • AET Fuel Dosing System
  • AET Combustion System with AET Spreader Stoker and AET BioGrate
  • Oil burner (Dertal)
  • AET Biomass Boiler with superheaters and economisers
  • AET Combustion Air System
  • AET SNCR DeNOx System
  • AET Steam Air Preheaters
  • Bag filter with lime injection system
  • Flue gas system and stack
  • Ash handling system
  • Air compressor system
  • Waste water treatment
  • Piping and ducting
  • Insulation
  • Structural steel for boiler house and cladding
  • Platforms and stairs
  • Instrumentation
  • PLC control system.

Additional Information

  • An article in Bioénergie International was published in Nov-Dec 2014: "A biomass boiler of 50 MW  from Aalborg Energie Technik delivered to DRT": Read more
  • To obtain more information about this biomass-fired plant and about AET: Contact AET sales.
Boiler: 50MWth
  120 bara
  525 °C

Electrical power:

≤17 MWe

Process energy: ≤25 MWth

The BES VSG boiler plant.

The BES VSG biomass-fired CHP plant.

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  • Aalborg Energie Technik a/s
  • Alfred Nobels Vej 21F
  • DK-9220 Aalborg East, Denmark
  • Tel +45 96 32 86 00
  • aet@aet.dk