Water & Wastewater Treatment

16 | FEBRUARY 2014 | WWT | www.wwtonline.co.uk Project focus A n innovative project to install flow monitoring stations has given the Athens Water Supply and Sewerage Company (EYDAP SA) a valuable source of information about the operation of its sewer network. The work, carried out by Greek contractor Metrica together with UK manufacturer Detectronic, has seen 15 monitoring stations put in on the main sewers and other important locations in the sewer network of the Greek capital. The utility now plans to extend the project to many other locations in the city a‡er the stations, which give detailed data on sewer flow and provide warning alarms for sewer blockages, leakage and flooding, were judged a success. Serving 4.3 million people, EYDAP is the largest water supply and sewer- age company in Greece and has 8,000 km of sewers in its network. With heavy rain presenting the periodic threat of sewer flooding, and with European regulatory standards to maintain, the company decided eight- een months ago that it needed to know more about the way its sewers were operating. A‡er winning a competitive tender, Metrica and Detectronic were engaged in summer 2014 with a five- year contract for the installation and ● Greek utility EYDAP installs UK-made flow monitoring equipment ● Excavation sha s required for access to trunk sewers ● Bonnet-shaped pipes presented calculation challenge maintenance of suitable monitoring equipment. "The ultimate target is to improve operational network performance, but this starts with understanding how the sewage network works: how it works during normal operations, during floods, blockages and so on," explains James Brockett EDITOR, WATER & WASTEWATER TREATMENT ● To fulfil the expectations of its customers and regulators, the Athens Water Supply and Sewerage Company (EYDAP SA) needed more information on the operation of its sewer network ● Real-time monitoring, with alarms unusually high or low flows, was needed in order to respond quickly to sewer leaks, blockages and floods ● EYDAP also wanted to understand how much surface run-off water was entering the sewers, in order to know how to target future infrastructure investment • Drivers Wastewater networks Sha solution for sewer monitoring in Athens

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