New straw-fired boiler supplies green district heating

12 MW straw-fired plant for Auning district heating facility

The new straw-fired plant at Auning district heating facility is fully integrated with two existing production units, a wood pellet-fired boiler and a reserve straw-fired boiler.

New boiler design accepts straw of varying quality
In recent years, the market for straw has been characterised by poorer-quality straw than previously, which presents challenges for straw-fired boilers.

“The fluctuating quality has forced us to change the boiler design so that the boiler can increasingly accept both damp and dry straw and still ensure smooth operation,” says John Martin Myrup, a biomass plant specialist at Verdo.

The plant in Auning has also been prepared for a second boiler, while the fuel storage can be doubled, which was not the case with the existing boiler system. Moreover, the plant is future-proofed with scope for expansion and change of the chosen fuel source.

Facts about the project

  • Fuel: straw from Danish cereals
  • Plant output: 12 MW
  • Temperature: flow max. 110 °C and return 40 °C
  • Commissioning: End of 2019

Want to know more about boiler plants?
We have optimised the boiler design so that the plant can increasingly accept both damp and dry straw and still ensure smooth operation. John Martin Myrup, sales manager for biomass plants at Verdo

Watch the video – installation of key components

See the picture series from week 15 (12-18 April) when the main components were assembled:

  • Boiler support frame
  • Combustion grate
  • Radiation part
  • Convection part
  • Bag filters
  • Flue


All the major components were assembled in one day. Altogether, 128 tonnes were transported, lifted and fitted.

The project in pictures

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We are looking back at a succesful installation of the main components.

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For more information, please contact

John Martin Myrup

Sales Manager | Energy Plants, biomass

Ole Andersen

Project Manager and Product Specialist | biomass, heatpumps