WestWater have successfully won a tender with Worley Power Services for the design, construction and installation of an upgraded caustic dosing system at the Saline Water Treatment Plant (SWTP) within the Collie Power Station, located in the South West region of Western Australia.

The Collie Power Station is a 340MW coal fired boiler/steam turbine based load facility. As part of the SWTP upgrades and on-site safety initiatives, the caustic (sodium hydroxide) dosing pump skids and associated equipment have been identified as needing to be replaced with a new enclosed caustic soda chemical dosing cabinet.

The new cabinet arrangement will be more easily accessible for operators, while enclosing the dosing pumps to prevent possible exposure to chemical if a leak were to occur. The dosing pumps are classified as critical equipment due to their operational demand from the SWTP, so WestWater will also be installing a temporary dosing system to support operations during installation of the new dosing cabinet.

The works WestWater will be undertaking will consist of:

• Design and construction of two (2) new enclosed caustic soda chemical dosing panels, including all required pumps, valves, and instrumentation.
• Design and construction of a temporary dosing system.
• Factory acceptance testing of the new chemical dosing panels.
• Site installation, including site acceptance testing.

All aspects of the works will be completed in accordance with the Contract, relevant design standards, and Australian Standards.

The project is expected to reach Practical Completion by April 2025.