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WATER SUPPLY & SEWERAGE
Sewerage system for Sottomarina - Venice Lagoon - Italy
Client:
Venezia Nuova Consortium for the Ministry of Public Works
- Water Board (Venice)
Services:
Surveys and
investigations; Basic, Preliminary and Detailed design
Period:
1988 - 2002
Construction
cost: €
2,685,600
The
project:
TECHNITAL
carried out the Preliminary and Detailed design of the
sewerage network for the town of Sottomarina in the context
of the project to protect Sottomarina from the high tides.
The new sewerage
network, consisting of a free surface flow system for mixed
sewage, was designed to connect the local sewerage system
(prior to the start of the works connected directly to the
lagoon by means of sewers having little or no gradient) to
the treatment plant operated by the Municipality of Chioggia,
thereby achieving the double objective of reducing the
discharging of organic waste into the lagoon and preventing
the tidal flow from rising up through the rainwater gulleys.
The sewage is
disposed of by pumps located in 3 pumping stations, either
directly into the lagoon (when there is sufficient rainfall
to guarantee adequate dilution), or conveyed to the
treatment plant (when there are high concentrations of
organic wastes).
The project
affects the entire historic centre, the system having a
total length of 950 m. Ten pumps with a flow-rate of 0.3 m3/s
were installed, for a total applied capacity of
approximately 300 KW.
The works have
been completed.
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