(SeeNews) - May 10, 2012 - Danish state-owned utility Dong Energy A/S and its partner AffaldVarme Aarhus will invest a total of DKK 550 million (USD 95.8m/EUR 74m) to extend the service life of Unit 3 at the Studstrup oil- and coal-fired plant to 2030, preparing it for a subsequent biomass conversion.