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Psyttalia Wastewater Treatment Plant

Serving the Greater Area of Athens, Greece

Project Details

Construction Cost:

Year of Completion:



€ 51.4m


Psyttalia Island, Athens, Greece

Services Rendered

• Participation in the preparation of the technical bid of the joint-venture concerning the conception and the elaboration of the master plan and general plan for the construction of the treatment station.
• After the contract award, planning, technical studies, process evaluation, hydraulic and geological studies, final design, construction drawings, technical assistance to contractors during the construction of the works, during commissioning and trial operation.

The Athens greater area treatment plant, located on uninhabited Psyttalia
island at 2 km from the west coast of Piraeus is one of the largest in the
world (3,300,000 inhabitants). The

treatment installations on the
island ensure the treatment of a peak of 27m³/s (Phase II). They include primary treatment, disinfection and disposal of treated wastewater into the sea.


Full sludge treatment and methane collection (used for heating the digesters and for electricity production) are operational.

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