A new sustainable industrial space spanning 10 000 m² has just been completed at Iggesund Mill. Similar hard surfaces are already being used at Braviken Sawmill and Paper Mill. The surfaces are sustainable because they are made from recycled materials and they are very resilient to heavy traffic.
Various kinds of residual products arise in the manufacture of Holmen’s products. Holmen endeavours to minimise its quantity of waste and residual products and to recycle the highest proportion possible. The majority is recycled or sent for energy recovery, but waste is also turned into new products, such as material for making hard surfaces at mills and sawmills.
This has been done at Braviken Paper Mill and Braviken Sawmill and Iggesund Mill is now following suit. The company Econova is responsible for developing methods that enable surfaces to be made mainly from recycled materials.
The hardstanding at Iggesund Mill is made from recycled ash from the biofuel boiler and will be used for drying water treatment sludge, and fibre sludge, a by- product from paperboard production. The method is called ECA, Econova’s Cement-stabilised Ash, which means that ash and bottom ash is recycled and replaces construction materials such as concrete and asphalt.
An additional hard surface covering 36 500 m² is almost ready for use at the Braviken co-location. The first stage is already complete and the remainder will be ready in the autumn. The surface is beside the railway line where logs come into the sawmill and paper mill. A slightly different method is used here, with waste concrete instead of ash.
The ECA surface has been in use at Braviken Sawmill for a long time now. It is used as hardstanding for incoming logs and by the tent where treated wood is stored.