Finnish construction company YIT has secured a €60m contract from Stockholm Vatten, a water utility company in the Swedish capital, for new infrastructure work in Henriksdal wastewater treatment plant in Stockholm.
Work will begin in February 2019 and be completed in December 2023.
The contract covers earth works, concrete work, rock engineering of the plant and installation work for underground wastewater systems.
The Finnish company will be responsible for the interior of the tunnel, which will be the basis of the new wastewater treatment technology in the plant.
As part of the contract, YIT will also renovate and improve capacity of the sludge treatment process.
A major part of the contract includes the construction of a new sludge separation building and auxiliary equipment.
The existing plant will continue operations throughout the construction period.
YIT executive vice president of infrastructure projects Harri Kailasalo said: “YIT has a solid knowhow and experience in constructing demanding underground treatment plants.
“We have partnered with Stockholm Vatten since 2016 and contracted three major projects, therefore we are proud of the continued trust being part of this future development project, which is in line with our vision of creating sustainable cities.
“We will ensure that the customer will have the latest and most modern wastewater treatment technology available today.”
The Henriksdal wastewater treatment plant, which is the largest in Sweden and one of the largest in Europe, serves approximately one million people and treats nearly two-third of the municipal wastewater of the Stockholm area.
The plant is also one of the world’s largest wastewater treatment plants located inside rock.
YIT, the largest Finnish and North European construction company, is involved in the development and construction of apartments, business premises and entire areas.
The company has operations in Finland, Russia, Scandinavia, the Baltic States, the Czech Republic, Slovakia and Poland.
Image: Henriksdal wastewater treatment plant in Sweden. Photo: Courtesy of YIT Corporation.