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.
CLIENT: Rottnest Island Authority
PROJECT: Recycled Water Plant
STATUS: Operational – December 2016
WATER DEMAND: Irrigation
WATER SOURCE: Raw Sewage
TECHNOLOGY: MBR + Chlorine
SERVICES PROVIDED: Investigation + Procurement + Superintendency + Operational Support