Increased water treatment capacity in the Stockholm region

Customer reference

By contributing to the modernization of the Käppala wastewater treatment plant in Lidingö, Rejlers is helping to reduce pollution in the Baltic Sea. The Käppala plant currently treats wastewater from more than 500,000 residents and businesses across eleven municipalities north and east of Stockholm.

Reference

About the project

  • Customer

    Käppalaförbundet / the Käppala Association

  • Challenge

    Modernising the plant with a new biological treatment process aiming to significantly reduce discharges of nitrogen, phosphorus and organic matter into the Baltic Sea.

  • Rejlers contribution

    Power supply, lighting, fire alarm, process electricity, instrumentation and machinery optimisation

To meet the stricter emission requirements, the plant is being rebuilt and upgraded with a new biological treatment process. Capacity is also being increased, providing growth opportunities for the municipalities. In 2024, Rejlers began an extensive collaboration with the Käppala Association, contributing to the modernisation of the plant by designing all power supply, general power, lighting, control, automation and process electricity for the new biological treatment process. Several of Rejlers’ divisions, along with our wholly owned subsidiary Eurocon, are contributing their expertise.

Broad expertise and innovation

As the plant remains in operation during the modernisation and the working space is limited, innovative solutions are required to ensure the project can be carried out efficiently. Particular emphasis has therefore been placed on coordination between all parties involved.

“This is an important project that showcases the broad expertise within Rejlers and the strength of working together towards a common goal,” says Mats Molander, Project Manager with extended project management responsibilities at Rejlers’ Industry division.

“It’s simply fantastic to be part of building this vital infrastructure for the future.”

An important contribution to the environment

The project will run until 2028 and is expected to significantly reduce emissions of nitrogen, phosphorus and organic matter, contributing to a cleaner Baltic Sea.

“By upgrading the Käppala plant, we’re making an important contribution to the Baltic Sea environment while also enabling our member municipalities to grow,” says Josefin Larsson, Project Manager at the Käppala Association.

“We look forward to working together with Rejlers on this project, which is both complex, time-critical and extensive.”