Stora Enso invests in sludge separation technology at mill resulting in biofuel

In Finland, Stora Enso will invest $24.8 million (EUR 22 million) at Skoghall Mill in Sweden in an expansion of the existing water treatment plant which is used in the production of cartons where small particles of wood fiber remain. By expanding the plant, the separation of sludge is improved, which in turn improves the quality of the water that is returned to the near-by Lake Vänern. The sludge can also be used as biofuel.

Increased capacity and new, modern technology will enhance the water treatment process at the mill. This will reduce the environmental impact of the operations and help to meet future environmental requirements.

“We always strive to use as much of the wood as possible, to find new uses for our by-products, and to minimise our environmental footprint,” says Margareta Sandström, Environmental Manager at the Skoghall Mill.

The project consists of three larger pools for more efficient sedimentation, along with associated process and control systems. Work is due to start immediately and is expected to continue until early 2020.