Upgrades at Perth Waste Water Treatment Works
Project Overview
Perth Wastewater Treatment Works was originally constructed in 1971 and treats wastewater for a population equivalent (PE) of 74,000 from Perth and the surrounding area. Significant growth is planned for the city of Perth by 2033 and the WwTW needs to be upgraded to provide the required capacity to treat the increased flow and loads up to 2033.This work is being delivered on Scottish Water’s behalf by our capital project delivery partner Efficient Service Delivery (ESD).
Project at a glance:
- Upgrades to Perth Waste Water Treatment Works
- Delivery by delivery partner ESD
- Estimated £65m investment
- Forecast for completion - September 2026
Perth Waste Water Treatment Works
Excavation work is now in its final stages as ESD work to upgrade Perth WWTW in line with the significant investment being carried out by Scottish Water across the city.
Latest Project Update
Work is progressing well on site with construction work now getting underway for the new Final Settlement Tank.
We have installed a road that is suitable for heavy vehicles, also known as a 'haul road', which allows the delivery of materials and for works to progress. Our excavation works are now in their final phase with work due to be complete in the coming weeks. Once all the excavation is complete we will install pipework along with the concrete base and walls for the Final Settlement Tank.
Sludge diversion works have been completed which has allowed the existing sludge infrastructure to be decommissioned and work to demolition this disused building is now taking place. Phase 1 of demolition has been completed and Phase 2 is now underway despite a brief interruption to progress due to the presence of a bird's nest on site.
