Environmental Declaration 2011 - Sappi

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Leading in fine paper The history of our firm begins in November 1898 when the pulp mill was founded as a branch works of Aschaffenburger Zellstoffwerke (AZ). The mill produced exclusively pulp until paper production started in 1963 when the first paper machines were taken into service. Since then the paper and pulp mill in Stockstadt has evolved to become one of Europe’s leading experts for fine papers thanks to consistently investing in machinery, such as the second paper machine set up in 1970, and in refining, process optimisation, product development and environmental protection measures. Today the mill has the capacity to produce 160,000 tonnes of pulp and 430,000 tonnes of paper with a workforce of ca. 700 employees and up to 40 apprentices. Since the beginning of 2009, the mill belongs to the South African Sappi Group, a worldwide leader in the manufacture of coated fine paper. With its production of premium quality fine papers Sappi Stockstadt operates in the Group’s core business field. Since its founding in 1906, Sappi Stockstadt GmbH’s 100 % subsidiary 6 Environmental Declaration 2011 company, Chemische Werke ZellWildshausen GmbH (CWZ), has concerned itself with the processing and marketing of renewable resources. CWZ’s stateoftheart Stockstadt lignin plant has operated since 1996 and facilitates the processing of lignin sulphonates accumulated during the pulp production process. CWZ has made a commitment to uphold the environmental standards set by Sappi Stockstadt GmbH. Pulp production Wood, delivered daily to the Stockstadt plant by road and rail, provides the basis for pulp production. The trunks are cut to 150 centimetres on the cutting machine, debarked in a debarking drum and chopped Sappi Stockstadt into chips by the disc chipper. The chips are transported via silos to the six digesters. In about six hours, at temperatures of up to 140 °C and pressure of 6 bars, the wood is chemically digested and the cellulose fibres exposed from the wood composite. The wood’s lignin content is reduced to 3 %. Most of the own pulp produced is pumped directly to the two paper machines. The remainder is dried, automatically cut into
sheets and sold to processing industry customers. Paper production Depending on the type of paper being manufactured, a mixture of short fibres (mainly own pulp) and long fibres (external pulp) is applied on both paper machines. Using two filters, water is extracted from this mixture of pulp fibres, fillers and water. It is subsequently conveyed over the press section towards the dryer where it is then dried to a moisture level of 5 % on steamheated cylinders. Paper machine PM1 produces uncoated fine paper, while paper machine PM2 produces socalled coating base paper which is transported to the coating machine. On the 100metre long coating machine, the base paper‘s plane arrangement of fibres, with its uneven surface structure, is covered with an even coating of pigment layer. Each side undergoes a twostep process, passing through the paper coating unit and drying devices to obtain a smooth, uniform surface. Converting Paper rolls are stored in the reel interim stock. Using dedicated equipment, the paper webs are cut into sheets according to customer requirements using cross cutters. The paper sheets are then stacked on pallets or cut into customised rolls, packaged and finally dispatched. Environmental Declaration 2011 7
Page 1 and 2: Environmental Declaration 2011 Sapp
Page 3 and 4: Contents ❘❙ Foreword...........
Page 5: More than just sustainability As a
Page 9 and 10: For future generations Wood is the
Page 11: Avoiding emissions Generating energ
Page 14: thermally in the heating power plan
Page 17 and 18: Optimising transport services means
Page 19 and 20: Occupational safety Our Vision: 0 a
Page 21 and 22: Environmental balance sheet busines
Page 23 and 24: Energy / Air emissions CO 2 emissio
Page 25 and 26: Environmental goals 2012 Area / Pro
Page 27 and 28: Certification The undersigned, Bern

Environmental Declaration 2011 - Sappi

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