Joutseno mill – the world´s largest softwood pulp production line​​


The Joutseno mill has a long history. Pulp has been produced on the banks of Lake Saimaa for more than a hundred years. The mill was completely modernised at the turn of the 21st century. The Joutseno mill is the world's largest single-line softwood pulp mill. The mill is a world leader in efficiency and environmental management and a pioneer in renewable energy utilization.

Continuous development at Metsä Fibre's Joutseno mill

In 2014, the focus of Metsä Fibre's development investments was on the Joutseno mill, where energy efficiency was improved and combustion gas emissions were reduced by renewal of recovery boiler constructions. Also, the chip silo of the digester and its odorous gas treatment system was modernised. This improved the product quality and runnability of the mill and also considerably reduced the odorous gas emissions of the mill.

The mill produces more bioenergy than it needs. The mill utilises wood efficiently by producing bioenergy and biochemicals in addition to pulp. Energy is produced in the combustion of cooking liquor, bark and wood chips and the mill produces 1.75 times more electricity than it consumes. Thanks to a gas generating plant, completed at the Joutseno Pulp Mill in autumn 2012, the mill is a carbon neutral pulp mill during normal operation.

Joutseno mill adopted a new pulp manufacturing process in 2013, when the new polysulphide cooking process was started up in 2013. With the new kind of softwood pulp improves customers' cost-efficiency and the technical propertis of the final products: paper and board. At the same time, the investment increased the production capacity and efficiency of the mill.

Key facts:

Capacity: 690,000 t/a of ECF bleached softwood pulp
Grade specialisation: Specialises in manufacturing pulp for wood-fibre printing papers (SC and LWC) and for high-quality coated printing and speciality papers
Share of exports: 95%
Personnel: 135
Wood consumption: 3.5 million m³ annually
Electricity self-sufficiency: 175 % electricity
PEFC certification percentage: approx. 72%


1909 Production of unbleached pulp commences
1951 Joutseno Pulp Osakeyhtiö founded
1984 Fully bleached pulp manufacturing begins
1997 Metsä-Botnia acquires Joutseno Pulp
1998 New recovery line
2001 New fibre line
2013 Production of polysulphide pulp started