1.5 M BGN was invested in the rehabilitation of the cogeneration installation in SWWTP Kubratovo

15 October 2018

The replacement of the three motors and the rehabilitation of generators from the CHP installation in Sofia Wastewater Treatment Plant in Kubratovo was completed in October. The Cogeneration (Combined Heat and Power - CHP) is a technology for combined production of thermal and electrical energy by using the biogas, obtained in the process of treatment of the sludge from the urban wastewater.

The 3 generators that were installed in 2009 completed 60 000 hours over a period of 9 years. Each of them has electrical capacity of 1063 KW. The generator part was rehabilitated in Varna and the replaced recycled motors were supplied by the Austrian manufacturer.

Since its commissioning until now, the installation has generated more than 160 000 MWh electricity and prevented the release into the atmosphere of over 700,000 tons of carbon emissions. The electrical and thermal energy generated in SWWTP Kubratovo is about 24% more than the necessary for the treatment process and the remaining energy is sold on the free electricity market. The effective work of these facilities are guarantee for energy self-sufficiency which Sofiyska Voda, operated by Veolia achieves within the entire water cycle. The generated green energy makes the treatment plant energy self-sufficient, despite the huge amount of energy necessary for the continuous technological process.
The rehabilitation of the CHP installation is with value 1.5 mln. BGN, which is only part of the investments made in the plant.

In 2018 Sofiyska Voda was distinguished with a special award for green investments at the national competition “Bulgaria’s Greenest Companies” for the implementation of innovations in the Treatment Plant.

Kubratovo SWWTP also received recognition for its considerable contribution to the WSS sector, with a special accent on innovation in the reduction of the energy consumption and the circular economy at the Sixth Annual WEX Awards (Water and Energy Exchange) in Lisbon. In the prestigious international platform companies were recognized in nine different categories. Sofiyska Voda won the prize for potable and wastewater management.

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