New wastewater pumping station at St. Petersburg WWTP, Russia
St. Petersburg WWTP required innovative and high efficiency technology to transport the waste water from deep below into a channel. The aims of this project was also to conserve water resources and to protect the Baltic Sea against the discharge of untreated wastewater and associated eutrophication.
Components installed in the solution
In St. Petersburg WWTP were installed:
- 13 Amarex KRT K 400-710 main pumps; with a nominal power of 580 kW each, they transport 2592 m3 of wastewater at a head of 59 m, achieving 81% efficiency;
- 3 Amarex KRT K 200-500 general drainage pumps;
- 3 Amarex KRT F 80-316 sump drainage pumps.
In the solution were also installed switch gears (by Finnish manufacturer VEO), a frequency inverter (by Finnish manufacturer Vacon OY) and a control equipment for each main pump, a power supply system and a control cables (by Finnish manufacturer Reka Cables Oy).
In 2005 the Russian metropolis of St. Petersburg initiated a large-scale wastewater project with the aim of using water resources more sparingly and sustainably. The project was founded by the city in cooperation with the EU and it was completed in 2013. It was a cooperation between Vodokanal of St. Petersburg and Finland’s Ministry of the Environment.
Within the project a new pumping station was commissioned in St. Petersburg WWTP. The pumping station is now the centerpiece of a twelve km long tunnel system which ensures that only fully treated water is released into the Baltic Sea. This pumping station is the deepest in Europe, it reaches a depth of 92 meters. An average of 600 000 m3 of wastewater is pumped into a channel from which it flows by gravity to the WWTP.
After the project the phosphorous and the nitrogen load to the Baltic Sea have decreased by 1000 tons each in one year. As soon as the pumping station has started operation in 2013, 98% of wastewater in St. Petersburg were fully treated. With its ambitious wastewater project the city fulfills the standards of Helcom and its helping to keep the Baltic Sea clean.