Dora Creek WWTW
The Dora Creek Wastewater Treatment Works serves the communities of:
- Morisset
- Bonnells Bay
- Yarrawonga Park
- Silver Water
- Sunshine
- Brightwaters
- Morisset Park
It currently treats:
- 3.1 megalitres of effluent per day
The Dora Creek plant can handle wastewater from a population equivalent to:
How it works
The activated sludge plant provides secondary treatment of the wastewater. The plant is designed to remove nutrients (nitrogen), solids and pathogens.
- The sewage receives screening with an automatic mechanical screen, odour treatment with a soil bed filter and flow measurement at the inlet works
- Biological treatment is achieved in two extended aeration tanks with an intermittently decanted extended aeration (IDEA) process.
- The decanted effluent flows into a large effluent balance dam.
- The large retention time within the dam exposes the effluent to ultra violet light that results in a certain level of disinfection within the dam.
Biosolids are treated in two sludge lagoons.
How is the treated effluent used?
All biosolids produced at the plant are beneficially used for mine site rehabilitation.
Screenings are dewatered and stored in industrial bins for removal off-site.
All treated effluent is reused at Eraring Power Station.
The power station further treats the effluent using membrane technologies before using the recycled water as feedwater to its high pressure boilers.