Wastewater Management
Client: Municipality of Salamina - GIGERTON SA
Year: 2007
ISSUE
The purpose of the project was the design of the internal vacuum sewer networks for City of Salamina (west sector), covering an area of 1800 hectares, as well as for the Community of Paloukia (east sector), covering an area of 2500 hectares. The design of the project was submitted with the design-built procedure.
SOLUTION
The aforementioned communities were served by septic tanks. The produced wastewater was discharged untreated in the broader region resulting in the degradation of the natural environment and the quality of life for local residents.
The table below shows the total peak population of all communities, for each design phase.
| Peak Population of Served Communities | ||||
| Community | Population 2001 | Projected Population in 2006 | Projected Population in 20 years | Projected Population in 40 years |
| West Sector | 5.229 | 5.633 | 7.587 | 10.219 |
| East Sector | 4.512 | 4.861 | 6.547 | 8.817 |
| TOTAL | 9.741 | 10.494 | 14.134 | 19.036 |
The design of the project was pursuant to the Greek Presidential Decree 696/74. The design of the pipelines and the pumping stations was based on a 40-year horizon, while the selection of the electrical and mechanical equipment was based on a 20-year horizon. Specifically, the project included:
- internal vacuum sewer network of the
West Sector (with total length of 14.815m and pipeline diameters from 90mm to 250mm) and internal vacuum sewer network of East Sector (with total length of 8.070m and pipeline diameters from 90mm to 250mm) - external twin force main pipeline network (with total length of 535m and pipeline diameters of 2 x 280mm and 2 x 355mm)
- Pumping stations – Vacuum stations. Two (2) pumping stations were designed for the wastewater suction from the pipelines of the two communities. In these pumping stations, two (2) force main pumping stations operate for pumping the wastewater to the external network
In each sector the wastewater is collected in the corresponding pumping station and vacuum station and subsequently is led to the existing main pumping station.
From the existing main pumping station, the wastewater is pumped to the Waste Water Treatment Plant of Psytalleia.
BENEFIT
The design of the sewer networks solved the wastewater problem of West and East sector of City of Salamina.