Project Outline Mutton Island Wastewater Treatment Plant is located in Galway serving the entire catchment area of Galway city and its environs. The original plant was constructed and commissioned by Murphy in 2003 and had been operated and maintained by Murphy since it entered service. This design, build and operate (DBO) project saw Irish Water engage Murphy to refurbish the existing plant and deliver an expansion in capacity from a population equivalent 91,600 to 170,000 followed by a 20-year operation and maintenance period. Mutton Island Wastewater Treatment Plant uses anaerobic digestion to renewable energy from organic waste and this project also entailed the installation of new combined heat and power (CHP) units to harness the biogas produced to power the operation of the plant. KEY FACTS Mutton Island is located in Galway Bay which is designated as a Special Area of Conservation and is a location of outstanding natural beauty, serving as an amenity to residents of Galway and tourists. Murphy will continue to operate and maintain this plant for Irish Water until 2035. Upgrade delivered without interruption to operational capacity or performance. Mutton Island Wastewater Treatment Works handles up to 170 million litres of wastewater per day during storm conditions.
Project Outline Under this design, build and operate (DBO) project Murphy delivered new and upgraded infrastructure at portfolio of sites across South Tipperary. The project encompasses plants at twelve separate locations and comprised both new builds and upgrades to existing facilities. The newly constructed plants were: Carrick-on-Suir (11,000 PE). Ballyporeen (1,000 PE). Ardfinnan (1,100 PE). Clogheen (1,000 PE). Ballyclerihan (2,000 PE). Existing plants which were refurbished and upgraded included: Clonmel (80,000 PE). Cashel (9,000 PE). Cahir (5,000 PE). Tipperary (9,800 PE). Fethard (3,000 PE). Kilsheelan (1,000 PE). Killenaule (1,200 PE). Key Challenges A key project driver shared by many of the plants is the continued protection of the Lower River Suir. Designated as a Natura 2000 site and a Special Area of Conservation, the Murphy operations teams continuously works to protect this water resource and area of outstanding natural beauty. Project Delivery & Innovations Murphy assumed operational responsibility for all existing facilities upon commencement of the design-build works in 2004 and have been responsible for their safe operation ever since. The project was delivered without any interruption to operational throughput or reduction in the performance. KEY FACTS The plants which go to make up the South Tipperary Grouped WWTS serve a combined population equivalent of 125,100. In 2010 Murphy delivered a further €5 million expansion to Clonmel Wastewater Treatment Plant with the installation of a new thermal sludge dryer.
Project Outline Under this design, build and operate (DBO) contract Murphy delivered a new water treatment plant to serve the town of Arklow and its environs. The project entailed delivery of the following: A new water treatment plant with a production capacity of 6.1MLD over 20 hours. 14 no. raw water abstraction boreholes. 1 no. surface water abstraction point at Goldmines. Treated water supply pumping station. Decommissioning and demolition of obsolete infrastructure. Operation and maintenance of the completed facility for a period of 20 years. Key Challenges Raw water supply is primarily sourced from boreholes but has the facility to draw up to 40% from the surface water intake at Goldmines depending on conditions. Our design delivered the flexibility to overcome changes in raw water sources by incorporating parallel treatment streams. These streams cater for the varying characteristics between surface and borehole water without and ensure output is not disrupted. Project Delivery & Innovations The design-build solution delivered by Murphy included: 14 no. raw water abstraction boreholes. 1 no. surface water abstraction point at Goldmines. Chemical storage, dosing and mixing system for coagulation, two-stage flocculation, pH correction, preliminary oxidation of soluble iron and manganese and chlorination. Dissolved air flotation (DAF) on stream for surface water supply. Rapid gravity sand filters. High lift pumps and surge protection for treated water feed to Lamberton Reservoir. UV disinfection of treated water for deactivation of cryptosporidium. Water quality monitoring on raw and treated water. Sludge thickening and dewatering facilities. EICA installation including SCADA system and communications links to allow abstraction points. Decommissioning and demolition of obsolete infrastructure. Murphy will operate and maintain this facility on behalf of Irish Water until 2035. KEY FACTS The new infrastructure was delivered without any outages or interruption to the water supply.
