Mar 20, 2007. /Lesprom Network/. Rottneros will appeal a decision by the environmental court in Östersund to the environmental court of appeals. The decision requires the construction of a biopurification plant at Vallvik mill. The plant which, according to the environmental ruling, must be operational by the beginning of 2010, would involve an investment of around SEK 100 million ($14.3 million). The court’s decision was not unanimous. Rottneros’ motive for appealing the ruling is that biopurification would not result in environmental improvement. Continuous measurements show that Ljusnefjärden, a bay in the southern part of the Gulf of Bothnia that receives waste water from Vallvik mill, is in very good condition and has not to any appreciable extent been affected by the discharge. As an alternative to biopurification, Vallvik mill has invested heavily in recent years in measures to improve internal processes, with good results. Rottneros is one of the world’s leading independent producers of market pulp. The group has net sales of approximately SEK 2.7 billion.