The Henriksdal treatment plant is being expanded, and we will be installing membrane technology that can treat twice as much water twice as effectively. The Henriksdal treatment plant will be the biggest plant of its type in the world.
The membranes will be able to treat more wastewater over a smaller area, and the water will be cleaner than it is at present.
Membrane technology is a very efficient way of removing both nitrogen and phosphorus. We will also meet future environmental requirements for Stockholm’s wastewater treatment by a decent margin, and so water quality in Lake Mälaren and the Baltic Sea will improve.
Another advantage of membranes is that they do not allow particles and particle-bound contaminants to pass through. This will make it possible in future to aftertreat and treat wastewater further to remove bacteria, viruses, microplastics and drug residues.