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ANDRITZ to Supply New Sludge Dewatering Plant
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Graz, Austria 20 August 2013 -- International technology Group ANDRITZ has received an order from Stora Enso to supply a new sludge dewatering line for thickening and dewatering of fibrous sludges for the board mill Skoghall, Sweden. With a capacity of up to 750,000 tons per year, Skoghall is one of the world’s largest producers of liquid packaging board. Start-up of the new ANDRITZ plant is scheduled for April 2014.

The order comprises delivery of a gravity table and a sludge screw press to process up to 50 tons of mixed sludge per day, thus significantly increasing the capacity of the existing sludge dewatering plants. The sludge to be dewatered consists of a mixture of fibrous and biological sludges, as well as chemical sludges from the mill’s CTMP line. The ANDRITZ sludge screw press dewaters the mixed sludge to the highest possible dryness that can be achieved today by mechanical means.

In order to meet the new process requirements resulting from this plant extension, Stora Enso’s order also includes the rebuild of an existing ANDRITZ belt press supplied in 1989. Due to the higher final dryness achieved through the dewatering lines in the future, Stora Enso Skoghall will be able to feed a higher amount of dewatered sludge to the power boiler and operate it with greater energy efficiency.


The ANDRITZ GROUP is a globally leading supplier of plants, equipment, and services for hydropower stations, the pulp and paper industry, the metalworking and steel industries, and solid/liquid separation in the municipal and industrial sectors. In addition, ANDRITZ offers technologies for certain other sectors including automation, the production of animal feed and biomass pellets, pumps, machinery for nonwovens and plastic films, steam boiler plants, biomass boilers and gasification plants for energy generation, flue gas cleaning plants, plants for the production of panelboards (MDF), thermal sludge utilization, and biomass torrefaction plants. The publicly listed, international technology Group is headquartered in Graz, Austria, and has a staff of around 23,800 employees. ANDRITZ operates over 220 production sites as well as service and sales companies all around the world.


ANDRITZ PULP & PAPER is a leading global supplier of equipment, systems, and services for the production and processing of all types of pulps, paper, tissue, and board. The technologies cover processing of logs, annual fibers, and waste paper, production of chemical pulp, mechanical pulp, and recycled fibers, recovery and reuse of chemicals, preparation of paper machine furnish, production of paper, tissue, and board, calendering and coating of paper, as well as treatment of reject materials and sludge. The service range includes modernization, rebuilds, spare and wear parts, service and maintenance, as well as machine transfer and second-hand equipment. Biomass, steam, and recovery boilers, gasification plants for energy production, flue gas cleaning plants, production equipment for biofuel (second generation) and biomass pelleting, biomass torrefaction, and plants for the production of nonwovens, dissolving pulp, plastic films, and panelboards (MDF) are also allocated to the business area.


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