The investment amounted at 45 million Kronor, is is the second stage of measures to improve the environment and general energy efficiency at Vallvik mill. In the middle of December last year, Rottneros decided to invest around 77 million Kronor in the evaporator facility at the mill.The new investment is also part of the increase in capacity planned for the next few years. Installation is scheduled for the fourth quarter of 2010 in connection with the annual maintenance shutdown."The increased capacity for evaporation, approved in December 2009, means that more of the mill's internal process water can be evaporated, which in its turn makes it possible to recover and incinerate the organic material. Put simply, this improvement to the soda recovery boiler increases the capacity for incineration, which increases Vallvik's output of bioenergy," explains Ole Terland, CEO of Rottneros.