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Bio-fuels accounted for 62% of the Group's energy production in 2002 (up from 60% in 2001). The most important bio-energy sources are black liquor from chemical pulp production, logging residuals and bark. Stora Enso units are continuously looking for new and more efficient ways to utilise residuals and by-products. For instance, sawmills have many good opportunities both to use bio-fuels to meet their own energy needs, and to provide cost-efficient energy solutions more widely within the Group.
 Port Hawkesbury Mill
Wisconsin Rapids Pulp Mill
Gruvön Sawmill
Tolkkinen Sawmill
At Port Hawkesbury Mill the share of bio-fuels increased by 8% during 2002 and TMP steam recovery increased dramatically from 13% in 2001 to 29% in 2002. The boiler now only uses marginal amounts of fossil fuel. Fuel oil and natural gas have been replaced by bark, sludge and sawmill residuals.
At Wisconsin Rapids Pulp Mill improvements in bark and wood-waste processing and conveying systems have enabled the increased use of these residuals as bio-fuels. This has led to a 30% increase in the use of bio-fuels in the mill's boilers since the project was implemented in August 2002.
In co-operation with Svensk Brikett Energi AB, Stora Enso Timber has installed a new facility for producing wood briquettes from shavings and dry chips at Gruvön Sawmill. As well as creating a clean and highly processed fuel, locating briquette production at the planing mill reduces transportation between the sawmill and end-users by approximately a third. This is because volumes are smaller when transporting briquettes.
Tolkkinen Sawmill in Finland purchases its thermal and electrical energy from the local municipal power plant, which is situated on the mill site. In 2002 this power plant started to run exclusively on bio-fuels, including bark and other wood residuals supplied by the sawmill.
Fuel consumption
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