Facts & Figures
|Average capacity||4,896 m3/day │ 23,000 p.e. (54 g BOD)|
|Peak Flow||622 m3/hour|
|Pre-treatment||Combined screening, grit and FOG removal|
|In the media||2015 Local Authority Engineering Award|
About the Clonakilty Nereda WwTW
Nereda technology comes to Ireland with first treatment plant at Clonakilty
Clonakilty WwTW is situated in County Cork, which is the second most populous county in Ireland. The municipal plant serves a population equivalent of 23,000. As part of utility provider Irish Water’s €7 million infrastructure investment, Clonakilty was one of 13 upgraded in County Cork. The scheme arose from the need to protect Clonakilty Harbour, which is classified as a National Heritage Area, Special Area of Conservation and a Special Protection Area. The old plant also experienced some odour issues which needed to be addressed, due to its capacity being overloaded. In addition to matters of conservation, the capacity of the plant needed to be increased, to enable reliable treatment of a greater volume of effluent, to allow the discharged water quality to be enhanced. This would be beneficial both to locals and visitors to the area.
Image: Overview of the Clonakilty WWTP
The main contractor, EPS Group, was awarded a 20 year design, build and operate (DBO) contract at Clonakilty WwTW. EPS selected Nereda technology for Clonakilty, its first use in Ireland. Clonakilty’s average capacity is now 4896 m³/day, with peak flow capability of 626 m³/day. The upgraded process combines screening, grit and FOG removal. The award-winning Nereda technology uses aerobic granular biomass – this means it requires much less energy and process stages to produce clean water, and it only needs a third of the footprint of other conventional water treatments.
Clonakilty, which became operational in 2015, was the first of more projects in Ireland – inlcuding the wastewater treatment plant of Dublin, Ringsend – to use Nereda technology. The new plants will help utilities provider Irish Water meet its requirements under European Union Urban wastewater treatment directive, which endeavours to improve health, water quality and the integrity of the environment. A key factor at Clonakilty is that the construction of the upgrade is largely underground, to minimise the visual impact of the project on its surroundings. As a result of Nereda’s implementation, Cork County Council won the ‘Local Authority Engineering Initiative Award’ at the Engineers Ireland Excellence Awards 2015, for its innovation and creativity.
The local benefits of the project
|Ensure treated effluent complies with EPA standards|
|Allow for future growth in population and economic development|
|Increase wastewater treatment capacity|
|Resolve odour and noise issues|
We are delighted to provide Nereda as the next generation wastewater treatment technology to our clients. Nereda is a cutting-edge development which offers very low cost of ownership to end-users of wastewater treatment plants.Jim Palmer - Technical director EPS Group