9000 m³ digester to enable planned maintenance

The Käppala plant in Lidingö receives wastewater from 1.5 million people in eleven municipalities to the north and east of Stockholm.

The plant is to be equipped with a third digester in order to create redundancy in the process and enable planned maintenance, as well as cope with increasing quantities of sludge. The new digester will be 9000 m³ in size, and will occupy a space that was blasted out of the rock.

Once everything is complete, nothing will be visible above ground apart from a small shelter for technical equipment.

The plant will also gain a new high-flow purge system, which will be installed to safeguard treatment capacity during abnormally high water flows.

This process equipment will also be placed within the rock and will increase the plant’s capacity from 5 to 8 m³/s.

PROJECT DETAILS

LOCATION:
Lidingö, Sweden

PERIOD:
2016-2019

CLIENT:
The Käppala Association

COWI'S SERVICES:

  • Sewerage system
  • Acoustics, noise and vibrations
  • Chemicals and ecotoxicology
  • Working environment and safety
  • Risk analyses and process safety
  • Surface water, groundwater and recipients

Get in contact

Thomas Lindberg

Thomas Lindberg
Chief Project Manager
Industry Stockholm/East, Sweden

Tel: +46 108502034

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