Edgeworth Wastewater Treatment Works

The Edgeworth Wastewater Treatment Works serves the communities of:

  • Charlestown
  • Hillsborough
  • Cardiff
  • Boolaroo
  • Speers Point
  • Glendale
  • Edgeworth
  • Barnsley
  • Killingworth

It currently treats 16 Megalitres per day and can handle wastewater from a population equivalent to 70,000 people.

Treatment Process

The activated sludge Edgeworth WWTW provides secondary treatment of the wastewater and is designed to remove nutrients (nitrogen & phosphorus) and provide some disinfection.

The sewage receives screening, de-gritting, flow measurement and odour control at the inlet works. Biological treatment is achieved through a Modified Ludzack-Ettinger (MLE) process following by settling in two secondary clarifiers.

Sludge is wasted from the reactors to the gravity drainage deck where it is thickened and onto a Belt Filter Press (BFP) where is it dewatered.


Recycling & Reuse

All biosolids produced at the Edgeworth WWTW are beneficially used for mine site rehabilitation. The dewatered screenings and grit collected is transported off site to landfill.

Hunter Water recycles approximately 5091Megalitres per year. Learn more about our recycling and reuse initiatives.

The remainder of the treated effluent is discharged via the Lake Macquarie Crossing to the Belmont ocean outfall.