How the construction of Blominmäki wastewater treatment plant proceeds

The Mikkelä access tunnel excavation, which was at the same time preparatory excavation work on the cave system, was launched in December 2014 and completed in September 2015. 

The excavation work on the cave system and aboveground facilities of the Blominmäki wastewater treatment plant was kicked off in September 2015 and completed in February 2018. After the excavation phase, the construction work at the wastewater treatment plant began in April 2018.

The sewer tunnels between Mikkelä and the sea shore will be excavated mainly after the excavation works on the treatment plant. In Mikkelä and Finnoo, parts of the sewer tunnels are already excavated in conjunction with the previous contracts during 2015¬2017. 

The test run of the wastewater treatment plant, start-ups of the wastewater purification process and sludge treatment process will take about a year. The goal is that wastewater purification and sludge treatment will be moved from Suomenoja to Blominmäki during 2022.

Blominmäki wastewater treatment plant 3D ​animation​

- produced in 2016