Recovery modernization at Stora Enso's Skutskar kraft mill

The Stora Enso Skutskar mill has increased production and reduced effluent load by making some major changes in the recovery system. Some new, cost-ef fective technology has been implemented. Equipment installed includes a ver tical air system in one recovery boiler, the burning of noncondensable gase s in another recovery boiler, and a new evaporator line with a stripper col umn to remove COD. Along the other modifications, these changes have increa sed the mill's capacity by 25% and have reduced the effluent COD by 20%.