PROJECTS

RECYCLED WATER AT ROTTNEST ISLAND

The Rottnest Island WWTP had reached the end of its usable life and required an infrastructure renewal. The Rottnest Island Authority (RIA) had identified that a significant amount (over 50%) of the potable water on the island was being used to water the golf course and oval and as a result identified a significant re-use opportunity. Project objectives included the following:

  • Construct a high quality, robust, reliable and automated WWTP that will consistently achieve the license and recycled water quality requirements. The close proximity to the ocean played an important factor in selecting materials and equipment.
  • Construct the plant around the existing facility whilst keeping it running and continuing to produce treated effluent in accordance with license requirements
  • Complete the construction with minimal impact to the surrounding environment

Multiple procurement packages were required to complete the upgrade works whilst sewage treatment continued on the Island.

The project won the 2017 AWA award for Innovative Infrastructure in WA.

 PP was involved in all stages of delivery for this facility from initial concept design, water balance, through approvals (ie Environmental + Health), reference design, procurement, construction, commissioning and validation. PP also acted as the Superintendent for the delivery of this project on behalf of the RIA. PP has provided operational support to the facilities manager on the Island (Programmed) since this asset was commissioning in late 2016 – our role is ongoing.

SUMMARY

 

CLIENT: Rottnest Island Authority

PROJECT: Recycled Water Plant

SIZE: 500kL/day

STATUS: Operational – December 2016

WATER DEMAND: Irrigation

WATER SOURCE: Raw Sewage

TECHNOLOGY: MBR + Chlorine

SERVICES PROVIDED:  Investigation + Procurement + Superintendency + Operational Support

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