In Denmark, three biomass gasifiers are in operation on a commercial basis. The gasifiers form the core of three CHP facilities that successfully generate heat for the district heating consumers in the respective towns and electricity for the grid.

     General data about the plants can be seen in the table below.

1.Harboøre CHP plant
     The Harboøre gasification plant is in operation all year round. It burns bio-oil when the gasifier has its main renovation one week per year. The bio-oil is a residue from the process; it is also useful in times of special need, during peak load hours of a cold winter, for instance, when you need more hot water than usual for the district heating grid.
     The gas is produced in a modern updraft gasifier designed as a vertical, cylindrical furnace with ceramic insulation. Freshly chipped forest wood chips with a moisture content of 39-50% are used as feedstock. The plant is controlled 100% on the basis of the heat requirement. The gasifier has an output of 4 MWth, and the gas can be burnt in a Low-NOx gas burner built onto a 4 MW hot water boiler.

2.Sindal CHP plant
Sindal District Heating company was until 2018 using natural gas for district heating. The technology consists of:
-An updraft biomass gasifier with partial oxidation
-An afterburner
-A thermal oil heater
-A scrubber system for recovery of heat
-An ORC uni

With this plant, Sindal District Heating Company obtains:
-Cheap & environmentally friendly fuels (Garden waste, wood chip)
-To run biomass both summer and winter in just one plant
-Low NOx emissions
-Low CO emission
-Low dust emission
-Co-production of heat and power

3.Skive CHP plant
At the Skive gasification demonstration project in Denmark, a bubbling fluidized bed (BFB) gasifier is used to produce gas from wood-based biomass. This gas is then cleaned catalytically and used in three IC engines in a combined heat and power (CHP) application. The capacity of the plant is 6 MW electricity and 11.5 MJ/s heat based on input of 20 MW wood pellets. The heat is consumed in the local district heating network in Skive and the electricity is sold to the grid.