The plant currently treats wastewater from more than half a million people in 11 municipalities north and east of Stockholm. When completed, the Käppala WWTP will be the largest MBBR system in the world.
WD News: Veolia Water Technologies subsidiary AnoxKaldnes, that offers moving bed biofilm reactor (MBBR) based solutions, will supply its renowned space-saving and capacity increasing solution to support the upgrade of Käppalaverket (Käppala wastewater treatment plant) in Lidingö, Sweden, owned by Käppalaförbundet (Käppala Association).
AnoxKaldnes has signed the contract with NCC, one of the leading construction companies in the Nordic Region.
The Käppala wastewater treatment plant (WWTP) is facing an increased load from affiliated municipalities combined with stricter emission requirements. The Käppala Association therefore plans to expand the capacity of the plant to cope with an incoming load corresponding to 900,000 population equivalent (p.e.) in 2050 and meet the new emission permit that will enter into force in 2026.
Each line of the WWTP existing system is approximately 18,000 m3 in volume and will be divided into nine individual zones in order to meet the challenging new requirements. With AnoxKaldnes™ MBBR systems, the five MBBR lines will be treating 80% of the incoming pollutant load and the flow.
The Käppala WWTP is built underground and the activated sludge lines are blasted from the bedrock meaning that the walls of each line are exposed raw bedrock.
Source & image courtesy: Veolia Water Technologies
