Swedish startup Stegra, formerly known as H2 Green Steel, has announced a collaboration with infrastructure investor John Laing and water treatment services provider Aquatech to develop a new water treatment facility essential for its planned large-scale green steel factory in Boden, Sweden.
This partnership aims to design, build, finance, operate, and maintain the water treatment facility at Stegra’s industrial site. The water treatment system is critical for the operations of what Stegra claims will be the world’s first large-scale green steel plant, currently under construction and slated to begin operations in 2026.
The facility will supply demineralised water necessary for the electrolysers that produce green hydrogen, as well as purified water for cooling systems. Additionally, it will treat wastewater from the steel mill, enabling a return of 99.9% of process water back to the production system.
Aquatech will handle the design, construction, and operation of the water treatment system, while John Laing is making a long-term investment in the project.
In January, Stegra secured EUR 4.75 billion (USD 5.16 billion) in funding to support the steel plant’s construction, increasing the total financing to EUR 6.5 billion. Once operational, the facility is expected to produce 2.5 million tonnes of green steel annually, with capacity anticipated to rise to 5 million tonnes by 2030.
