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Home /Projects/ Featured Projects/ Dublin Bay Project article


The Dublin Bay Project is a €300 million investment in water quality, financed by the EU Cohesion Fund and the Department of Environment, Heritage and Local Government. It provides a very good example of sustainable regional development because it will benefit the people living around Dublin Bay andwill also facilitate economic development.

The flagship of the project is The Ringsend Wastewater Treatment Works which is one of the most advanced wastewater treatment plants in the world. The project will also provide a new Pumping Station in Sutton in Co. Dublin and a 10.5km submarine pipeline under Dublin Bay to bring the wastewater to Ringsend for treatment.

The treatment process at Ringsend is entirely natural and removes over 95% of polluting matter from household and commercial wastewater before it is discharged into Dublin Bay. Wastewater from home and businesses in the city is treated with oxygen from the air and heat is used to treat the sludge. The plan produces clean water and Biofert – an organic based fertiliser made by thermally drying the sludge. The sludge treatment also generates enough methane gas to supply in the region of 55% of the energy needed to run the treatment works.

The new treatment plant means that the water in Dublin Bay is now cleaner than it has been for over 300 years and will ensure that Dollymount; Sandymount and Merrion strands will meet EU and National Bathing Water Standards. It will also mean beaches in Dublin Bay should qualify for coveted Blue Flag status.

Environmental concerns have also been taken into account in the new development. Local people were particularly concerned about a large number of light-bellied Brent Geese, which come to Dublin Bay from Canada every winter. They would always settle at the old treatment works. The new treatment plant took this into account and with the co-operation of residents, environmental groups and Dublin City Council a new two-hectare site has been allocated to protect the species.

The project was a Design, Build and Operate Project for Dublin City Council. The contractor will operate the plant for the next 20 years on behalf of Dublin City Council.

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