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Projects Prefeasibility Study and Master Plan for a Wastewater Treatment Plant on the Left Bank of the Danube
Prefeasibility Study and Master Plan for a Wastewater Treatment Plant on the Left Bank of the Danube PDF Print E-mail
Prefeasibility Study and Master Plan for a Wastewater Treatment Plant on the Left Bank of the Danube in the City of Novi Sad (400,000 PE)

altClient: Water and Wastewater PU of Novi Sad
Chief Design Engineers: Branislav Hiba, CE; Vladimir Jelenković, ChE; Miodrag Popović, CE

This project addresses the collection, evacuation and treatment of wastewaters generated by the part of the City of Novi Sad located along the left bank of the Danube River.

In addition to presenting the current situation and assessments of wastewater quality and quantity, the Prefeasibility Study discusses several options for future wastewater and stormwater evacuation and treatment. An economic analysis was prepared for each option and other factors were addressed as well, particularly  environmental issues. As a result, project documentation proposes a comprehensive solution and includes an overall cost estimate. The project can be implemented in stages, based on priorities and available funding.

In order to deliver all of the wastewater and a portion of the stormwater to the new WWTP on the left bank of the Danube, some of the existing sewerage system components need to be reconstructed and a number of new facilities added, such as: a South Sewer, including a main pumping station and relief weir; a West Sewer, including a pumping station; and a Northeast Sewer, including a pumping station and discharge pipeline. The Master Plan includes technical concepts for all future main sewers to the WWTP, and special structures and facilities (e.g., a main pumping station with a relief weir for the separation of stormwater and wastewater with a dilution rate of 1+1).

Project documents which address the WWTP include assessments of the current and future hydraulic and organic loads and they suggest 400,000 PE. Three treatment options were assessed based on WWTP sizing data. The first option assumes conventional activated-sludge treatment (without nitrification) and anaerobic sludge stabilization. This option will require the construction of a pipeline from the WWTP to the Danube River, and a pumping station which will discharge the effluent into the Danube. The second option is based on conventional activated-sludge treatment (including nitrification, denitrification, and phosphorus removal), anaerobic sludge stabilization, and discharge of treated wastewater into existing hydraulic reclamation canals. The third option assumes constant-feed SBR reactor treatment (including nitrification, denitrification, and phosphorus removal), aerobic sludge stabilization, and treated wastewater discharge into existing hydraulic reclamation canals. All three options call for UV disinfection of the effluent.

Based on techno-economic analyses of the three options and a comparison of annual operating costs, the first option was discarded, and the second option was deemed slightly better than the third option. As a result, the second and third options will be addressed in more detail within the scope of the ensuing preliminary design. The proposed concept allows for project implementation in stages.

The objectives of the Prefeasibility Study and Environmental Impact Assessment of the Novi Sad wastewater project were to propose a technical solution, assess the project’s environmental impact, present a comprehensive financial analysis, and assess the economic viability and sustainability of the entire undertaking.

 

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