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Wellington Water Treatment Plant DAF and Capacity Upgrade

  • Completion date: August 2025

  • Track record: THE PROJECT WAS COMMISSIONED SUCCESSFULLY AND ON TIME. SCOPE CHANGES WERE HANDLED WITHOUT CAUSING DISRUPTION TO THE PROJECT COMPLETION

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A water treatment plant in the greater Wellington Region required an upgrade to increase capacity to 140 ML/d, improve redundancy and resilience, and continue to meet the requirements of the Drinking-Water Quality Assurance Rules. This was achieved through the installation of a new Dissolved Air Floatation (DAF) system and increasing the capacity of the existing chemical dosing and solids-handling systems in cooperation with Wellington Water’s in-house automation engineers.

The increased capacity and dosing are now in operation, providing clean water to the region as planned.

Services provided
  • Functional design of PACl, Polymer and PAC storage and dosing
  • PLC and SCADA development, factory and site acceptance testing
  • Commissioning for the full DAF plant
Product description
  • Rockwell L84E ControlLogix PLC
  • Updates to existing Citect SCADA