Metsä Fibre and Aquaflow have signed a preliminary agreement concerning a wastewater treatment plant for the Kemi bioproduct mill in Finland. The plant would treat the wastewaters of the entire Kemi mill integrate. The agreement covers equipment delivery and process engineering. The degree of Finnish content is approximately 70%.
The planning of the bioproduct mill is based on a high degree of environmental, energy and material efficiency. If implemented, the mill would be built using the best available techniques (BAT), and the wastewater treatment plant would represent even more advanced technology than required by BAT standards. Wastewater emissions are minimised primarily by closing water circulations and with good operation of the production process, and with the help of an advanced wastewater treatment process.
The Kemi mill integrate’s wastewater burden on the waterways would be extremely low compared to the emission levels achievable by the best available techniques. Achieving emission level as low as this requires the latest process technology in both production processes of bioproducts and wastewater treatment, combined with good and consistent usability. The emission level as a whole can be considered exceptionally low on both the Finnish and global scale.
Aquaflow also delivered the wastewater treatment plant of Äänekoski bioproduct mill. The plant to be delivered to Kemi will be implemented with equivalent technology. Operation of the new wastewater treatment plant is based on a multistage biological treatment process and further chemical treatment, which achieves the required efficiency and reliability. Aquaflow is a global market leader as a supplier of wastewater technology to the chemical forest industry.
The bioproduct mill would not use any fossil fuels at all, and its electricity self-sufficiency rate would be 250%. This would further strengthen Metsä Group’s major position as an electricity producer relying on renewable Finnish products.