Kakolanmäki Wastewater Treatment Plant

A 471,000 cubic meter rock field was excavated near the center of Turku for construction of the Kakolanmäki Wastewater Treatment Plant. When completed, the wastewater treatment plant replaced five old treatment plants and also reduced the region’s effluent load to the sea by 30–50%.

The sludge separated during the treatment produces biogas, which is used for district heating. The Kakola Heat Pump Plant also uses the waste heat from the treated wastewater.

The adjacent, valuable old buildings housing the Kakola Prison, created challenges for the excavation. Design and construction of the wastewater treatment plant particularly considered the location in the urban environment and near our valuable archipelago.

Client
Turun seudun puhdistamo Oy/FCG

Responsibilities
Rock mechanics and tunneling design

Related References

West Metro

Länsimetro Oy

With the West Metro extension, the Helsinki metro network will reach Espoo, increase in length by 21 kilometers and see 13 new stations constructed along its run.

Vuosaari Transportation Tunnels

Tiehallinto/ Vuoli-projekti

Rockplan designed Vuosaari Harbor’s Porvarinlahti road tunnels and Labbacka railway tunnel in cooperation with Finnmap Infra Oy. The 1,600-meter-long submarine road tunnel in Vuosaari is approximately 25 meters below sea level at its deepest point.

Viikinmäki Wastewater Treatment Plant

Helsingin vesi (now Helsinki Region Environmental Services Authority HSY)

The Viikinmäki rock treatment plant, which was built mainly inside the rock, was put into operation in 1994. The treatment plant’s process is based on the activated sludge method.

Interested?

For more information please contact Paula Kajava
+358 50 337 7876
paula.kajava@rockplan.fi