Athens Water Supply and Sewerage Company (EYDAP)

www.eydap.gr

Athens Water Supply and Sewerage Company (EYDAP SA) is the largest of its kind in Greece. The Company serves in the water supply sector approximately 4,300,000 customers through an extensive network of 2,020,000 water meters and a 9,500 km of water pipes. The sewerage sector serves 3,500,000 residents with sewers spreading at almost 6,000 km. The Company operates four water treatment plants that have a nominal supply from 200.000 to 600.000 m3/day each.

EYDAP has designed and implemented the sewage treatment system in Metamorfosi Attikis, Psyttalia Island and recently in Thriassio Pedio. The Metamorfosis WWTP is the only plant in Attica Prefecture that can receive and treat septic sewage generated from areas without sewerage system. The design capacity of the plant is 24,000 m3/day of septic sewage and 20,000 m3/day of municipal wastewater. The Psyttalia WWTP includes pre-treatment, primary and secondary treatment with biological nitrogen removal, sludge treatment and cogeneration of electrical and heat. The Psyttalia WWTP capacity is 5,600,000 p.e., being one of the biggest WWTPs in Europe and worldwide. The average supply of incoming wastewater is the range of 730, 000 m3/day. The first phase of the project has been in operation since 1994, the second phase since 2004, while the third and final phase of works completed in 2007 with the construction of sludge thermal drying unit. EYDAP undertook the construction and operation of the project "Main Collectors and Wastewater Treatment and Disposal in Thriassio Pedio", which is a sensitive environmentally area. The aim was to upgrade the quality of life of 117,000 inhabitants, restoring the balance of the ecosystem of the sea of Eleusis and generally contributing to the sustainable development of the region. The project of Thriassio Pedio serves residential areas, as well as industrial and commercial areas. The Thriassio Pedio WWTP has been in operation since December of 2012. EYDAP’s expertise in operating large water and wastewater treatment plants and networks ranks it very high among the Mediterranean water and wastewater companies. EYDAP maintains an up-to-date R&D department staffed with experienced researchers as well as modern laboratories and installations. EYDAP’s researchers have already published a large number of scientific work regarding water quality control and related innovative analytical methods. The R&D department of EYDAP is going to be responsible for the participation of the company in the project and for the implementation and evaluation of the actions.

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SMART-Plant scales-up in real environment eco-innovative and energy-efficient solutions to renovate existing wastewater treatment plants and close the circular value chain by applying low-carbon techniques to recover materials that are otherwise lost.

Seven plus two (7+2) pilot systems were optimized for more than two years in real environment in five municipal water treatment plants, including also two post-processing facilities. The systems were automatized with the aim of optimizing wastewater treatment, resource recovery, energy-efficiency and reduction of greenhouse emissions. A comprehensive SMART portfolio comprising biopolymers, cellulose, fertilizers and intermediates were recovered and processed up to the final commercializable end-products.

Dynamic modeling and superstructure framework for decision support was developed and validated to identify the optimum SMART-Plant system integration options for recovered resources and technologies.

The integration of resource recovery assets to system wide asset management programs were evaluated in each site following the resource recovery paradigm for the wastewater treatment plant of the future, enabled through SMART-Plant solutions. The project proved the feasibility of circular management of urban wastewater and environmental sustainability of the systems, through Life Cycle Assessment and Life Cycle Costing approaches as well as the global benefit of the scaled-up water solutions.

Global market deployment was achieved as right fit solution for water utilities and relevant industrial stakeholders, considering the strategic implications of the resource recovery paradigm in case of both public and private water management. New public-private partnership models were also explored connecting the water sector to the chemical industry and its downstream segments such as the construction and agricultural sector, thus generating new opportunities for funding and potential public-private competition.