Navan Wastewater Treatment Plant Upgrade

Uisce Éireann has been granted planning permission for the upgrade the Navan Wastewater Treatment Plant Project.

The project will significantly improve the quality of treated effluent discharges to safeguard water quality, provide additional wastewater capacity and ensure the WwTP is compliant with regulatory discharge limits. Navan WwTP is located approximately 4km east of Navan town centre on the southern bank of the River Boyne, Meath County.

The existing plant has a design capacity for 45,000 population equivalent (p.e.) and its current daily load is 42,000 p.e. This upgrade will increase this capacity from 45,000 p.e. to 54,000 p.e., which represents an increase of 9,000 p.e.

• Increase Population Equivalent (PE) treatment capacity to 54,000
• Provision of two new covered Primary Settlement Tanks  
• Provision of new final (Secondary) Settlement Tank
• Provision of new Sludge Liquor Buffer Tank
• Provision of new Thickened Sludge Holding Tank
• Provision of new holding tank for Alum sludge imports
• Installation of additional centrifuge
• Replacement and refurbishment of screens, pumps and associated parts;
• Application of covers to existing settlement tanks;
• Upgrade of ventilation system and installation of Odour Control Unit;
• Provision of a containerised Standby Generator;
• Construction of below ground storm attenuation tank to offset additional surface water runoff from proposed and existing Primary Settlement Tanks;
• Decommissioning of redundant Sludge Digestor tanks and related equipment;
• Modifications to site entrance to improve sightlines.

• Significantly improve the quality of treated effluent discharges to the River Boyne to safeguard water quality in the river
• Ensure the WwTP is compliant with regulatory discharge limits (provide appropriate treatment)
• Provide additional wastewater treatment capacity to enable population growth in the Navan area

Planning has been granted for the project and Uisce Éireann expect to award the contract for works soon and commence upgrade works in Q3 2006.

Further information

We will endeavour to keep stakeholders updated as this project progresses.