Installation of 12th Drum Thickener at Ringsend WwTW
Uisce Éireann
Upgrade
Dublin, ROI
As the major infrastructure upgrades at Ringsend Wastewater Treatment Works to increase treatment capability from 2.1 million PE to 2.4 million PE are nearing completion, biosolids output has increased as a result.
The installation of the 12th Drum Thickener will ensure that the sludge treatment plant is capable of processing the increased volumes of biosolids, thereby ensuring the continued recycling of Class A Biosolids.
Project Highlights
Project Scope and Delivery
CAW was responsible for managing the supply, installation and commissioning of the 12th Drum Thickener.
We were appointed to manage this project based on our strong safety record and extensive experience delivering complex upgrades within operational environments. The scope of work included:
- Project Management;
- Site and subcontractor management;
- Overseeing all safety protocols;
- Implementing a schedule of enabling works;
- Supply and installation of Huber Drum Thickener;
- Supply and installation of Poly Pump Dosing skid, and associated works;
- Mechanical and Electrical works;
- SCADA and Control updates;
- Testing and commissioning;
- Supplying a full set of documentation and operation manuals.
Project Delivery and Outcome
The installation of the Drum Thickener, complete with the associated Poly Dosing Skid, posed significant logistical challenges due to its size, weight, and the constraints of a complex site with limited space.
Expert planning
To ensure a safe and efficient installation, meticulous planning and coordination were critical. This included detailed lifting plans, rigorous safety protocols, and precise scheduling to minimise disruption to existing operations and mitigate operational and safety risks.
Safely Lifting the Drum Thickener into place
A 450-tonne crane was deployed to position the 12th Drum Thickener, a high-risk operation expertly managed by our experienced contractors together with CAW’s on-site Mobile Engineering Team (MET).
A Site Traffic Management Plan was implemented to facilitate the delivery and lifting into place of the Drum Thickener, and due to high winds, the lifting of the Drum Thickener into place had to be rescheduled for Saturday morning.
Enabling works
The installation also included multiple tie-ins to existing lines, including wash water, polymer dosing, SAS inlet and outlet, and filtrate outlet. These tie-ins would ordinarily necessitate shutdowns; however, through careful sequencing and planning, CAW was able to minimise downtime and maintain operational continuity.
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