Aalborg Energie Technik a/s (AET) Biomass Cogeneration Plant

ENGIE Cofely, Biolacq Energies, France

The Biolacq Energies project, in Lacq, is a biomass-fired CHP plant with an annual fuel consumption of 160,000 tonnes of forestry wood, and clean, uncontaminated residues from wood processing.

Biolacq Energies, which is a subsidiary of Cofely Services, supplies steam to SOBEGI at the INDUSLACQ Industrial Park (a Seveco site).


The AET Biomass Boiler supplies steam to a high pressure turbine, which sends medium pressure steam to SOBEGI as well as low pressure steam to an air cooled condenser.


The use of wood energy prevents the release of 86,000 tonnes of CO2/year in the next 20 years. It produces 89 GWh of green electricity per year, which is equal to the power consumption of 13,000 homes.


Performance Test

The performance of the AET Biomass Boiler was successfully tested by Bureau Veritas in 2015:

  • Boiler efficiency: 93.5%
  • In-house power consumption only 0.7% of the fuel heat input (359 kW)
  • Emissions well within the stringent French standards.

The plant was completed and commissioned in 2016.

AET Scope of Supply

AET has designed, supplied, constructed and commissioned the following scope of supply:

  • AET Fuel Dosing System
  • AET Combustion System with AET Spreader Stoker and AET Biograte
  • Oil burner
  • AET Biomass Boiler with superheater and economiser
  • AET Combustion Air System
  • AET Steam Air Preheaters
  • Bag filter with lime injection system
  • Flue gas system and stack
  • Ash handling system
  • Air compressor system
  • Waste water conditioning
  • Piping and ducting
  • Insulation
  • Structural steel for boiler and boiler house
  • Platforms and stairs
  • Instrumentation
  • PLC control system.

Additional Information

  • Biomass has become a rapidly increasing energy source for COFELY, which has seen an increase in the number of projects using biomass, including Biolacq Energies. Read more
  • To obtain more information about this biomass-fired plant and about AET: Contact AET sales.
Boiler: 54 MWth
  120 bara
  525 °C

Electrical power:

≤12 MWe

Process energy:

≤38 MWth

The AET Biomass Boiler at Biolacq Energies in France.

The Biolacq CHP plant was commissioned in 2016.

The wood comes from uncontaminated residues from the processing of wood.

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