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UZOS South-West Wastewater Treatment Plant

Average Flow Capacity

330,000m³/d

Population Served

720,000

Primary Treatment

Screening, grit removal and primary sedimentation

Secondary Treatment

Biological nutrient removal for BOD-reduction; PDN-process

Tertiary Treatment

UV-disinfection

Sludge Treatment

Thickened biosludge mixed with raw sludge; dewatered by centrifuge and then incinerated

Sludge Incinerator Design Capacity

68t/d (dry solid)

Suspended Solids

Reduced by 20,000t

Total Phosphorus

Reduced by 500t

Total Nitrogen

Reduced by 2,250t

BOD

Reduced by 20,000t

Heavy Metal Salts

Reduced by 40% to 60%

Discharge from Plant to the Outlet Chamber

Underground, 2 x DN 2000 concrete gravity lines, 4,132m total length

Discharge from the Outlet Chamber to the Sea

Submerged, 2 x DN 2000 steel lines, 4,960m total length

Contract Type

Turnkey, in four packages (1 x lump sum, 3 x management / procurement)

Construction Time

31 months

Completion Project Cost

€200m

Sludge Incineration Plant

€24m (from European Commission)

Sewage Collection System

€15m (from St. Petersburg city budget)

Initial Construction Began

1987

Construction Paused

1995

Financial Agreement Signed

December 2002

Current Construction Commenced

21 March 2003

Sludge Incineration Plant Construction Began

2004

Completion

September 2005

Duration of Operation and Maintenance Contract

12 years

Project Sponsor

City of St Petersburg

Client

Nordvod - special purpose, limited liability company; NCC / Skanska / YIT consortium (41%), Vodokanal (41%); NEFCO (18%)

Main Contractor

SWTP Construction (YIT, Skanska East Europe and NCC consortium)

General Contractor

Bamag GmbH & Co, Germany

Operators

Ecovod

Architects

Vesa Ekholm and Antero Syrjänen

Structural Design

Insinööritoimisto Vahanen

Mechanical, Site Works and Process Design

Plancenter

Electronics, Control and Automation Design

Ettelplan Oy

Main Designer

SUE Lengiproinzhproect

Funding

European Bank for Reconstruction and Development; Nordic Investment Bank; European Investment Bank; Northern Dimension Environmental Partnership; Finnish Ministry of the Environment; Nordic Environmen

Swedish International Development Agency, Finnfund, Swedfund
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