The Wärtsilä Corporation will install a BioEnergy 10 boiler at the Impilahti sawmill in Karelia and BioEnergy 6 and 8 boilers at Nebolch in Novgorod. Both will burn bark residue.

Stora Enso already has seven similar boiler plants operating in Estonia, Latvia and Lithuania with a combined capacity of 52 MWth.

A spokesman said: “Apart from the ecological benefits of burning residue material, the plants will have the ecological benefit of using a renewable resource thereby being neutral with respect to carbin emissions and thus global warming.”