FEATURE: BIOENERGY IN INDUSTRY Bioenergy International No 79, 3-2015 13 SödraVärö fuel. Södra Cell Värö receives 180 trucks of pulpwood every day. Sawlogs are delivered directly to Södra Timber Värö. The debarking of pulpwood and sawlogs generates large volumes of wet bark. Previously some of the bark at the pulp mill was gasified and the producer gas was used in the lime kiln. In 2009 a bark dryer was installed and now all the pulp mill bark is put through the dryer. – We increased dry matter content from 40 percent to 60 percent, which is the level customers want. The dried bark is loaded into railcars on our own railway spur. Three train sets per week leave the pulp mill destined mainly to clients in the Mälardalen region, says Fredrik Tärneberg. Some bark is also delivered by truck and an energy gain is made by avoiding having to transport water. 100 truckloads of dried bark is the equivalent of 192 truckloads of wet bark. The total volume of bark sold in energy terms is about 300 GWh. The drying of the bark improves the heating value from 0.63 MWh / m3loose to 0.75 MWh / m3loose. Incremental investments The investments have taken place step by step over a fifteen year period. Usually it is about finding synergies between different parts of the pulp mill as well as between the pulp mill and sawmill. All modifications and invest- The new pellet plant is symbolically sited between the pulp mill and the sawmill drawing of the synergies of the two production facilities. “The dried bark is loaded into railcars on our own railway spur. Three train sets per week leave the pulp mill” FREDRIK TÄRNEBERG, EXPORT BUSINESS MANAGER FOR REFINED BIOFUELS AND PEAT.
Bioenergy no 3 May 2015
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