Helsingin seudun ympäristöpalvelut HSY is building a new wastewater treatment plant in the Blominmäki bedrock in Espoo. The underground cavern will be used for sewage treatment tanks and most of the other premises of the treatment plant. A biogas plant and administrative buildings will be located above the ground.
When completed in 2022, the treatment plant will treat the wastewater of 400,000 inhabitants from Espoo and Kauniainen, Kirkkonummi, Siuntio and Länsi-Vantaa. The very large plant complex includes about 50 km and 1,300,000 kg of process pipelines, 1,500,000 kg of steel structures and 93,000 m3 of concrete.
The project management contractor is YIT Oy. Ardor Oy will deliver a complex that includes more than 10 km of process pipelines to the plant under construction.