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Highlights
  SustainabilityEnvironmentResidualsHighlights

Residuals to beneficial uses

   

Stora Enso mills have implemented several new beneficial use projects for residuals during 2004:

  • Berghuizer Mill has started to have some of its paper residues processed by CEDEM, a company founded by four Dutch papermaking companies to develop a sustainable method for processing residues. The resulting inorganic residuals are used in various civil engineering applications including road construction and cement improvement.
  • During 2004 Veitsiluoto Mill started to deliver fly ash to Outokumpu Oyj’s Kemi chrome mine, where it is used as a hardener during the hydraulic backfilling of mine cavities.
  • Whiting Mill has begun to send woodyard scrapings (wood, bark, sand, grit and rock mixture) to an outside vendor for screening and recycling. These residuals had previously been beneficially used for internal road and dike construction at the Water Renewal Center landfill, but the need for such material in landfill construction has decreased since the amounts of waste being sent to the landfill have fallen significantly.
  • Wisconsin Rapids Pulp Mill has begun to use bottom ash more widely for road construction. The material was previously landfilled or used in the construction of roads at the Water Quality Center landfill.

Several Stora Enso mills are also currently running projects and trials to identify new beneficial use for wastes, including the following:

  • Celbi Mill successfully conducted trials in 2004 using bark boiler fly ash to fertilise and improve soils in Celbi’s eucalyptus plantations. In 2005, the intention is to use 20–30% of Celbi’s bark boiler fly ash in the plantations.
  • Corbehem Mill is investing EUR 2.1 million to increase the capacity of its sludge dewatering unit and thus reduce the amount of waste going to the landfill. Currently the sludge dewatering unit processes 50% of the sludge for use in agriculture. The other 50% of the liquid sludge is landfilled. Once the new sludge dewatering unit is put into operation in April 2005, close to 100% of the mill’s sludge will be used in agriculture.
  • Hylte Mill is testing a pilot programme in order to compost approximately 10 000 tonnes of sludge annually. Fors Mill is also performing a similar composting project.
 
















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