Sewage Treatment Plant Tertiary Upgrade


Triple i carried out the functional design, SCADA/PLC programming and commissioning of the tertiary process for a sewage treatment plant upgrade, part of the Sydney Water network.

Starting with the wiring design, installed hardware and basic functional concepts, Triple i prepared detailed specifications for the final operation. This included the functionality of the new tertiary facilities as well as the integration to the existing PLC and SCADA system. All this had to be done whilst the plant was fully operational which meant planning for multiple partial changes of the plant processes as required.


  • Update functional descriptions for operational information.
  • Generate detailed functional design documents.
  • Code the required changes.
  • PLC programming and SCADA configuration.
  • Implement and commission the systems.

Control systems

  • Siemens TI 505 PLC’s.
  • Wonderware SCADA.


  • New controls proving recipe and adjustable sample sequences.
  • Relocation of facilities with no shutdown.
  • Changeover of system within normal operating windows e.g. four (4) hour shutdowns and cutovers.
  • Project completed on time and to specification.
  • Provision of remote support for the site when required.


Regardless of your industry, with the latest technologies and innovations in process automation and control, we can maximise output, assure quality and safeguard safety. For more information call us today.

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