The purification process

Central Park Water’s processes meet strict Australian Guidelines for Water Recycling set out by Federal and State Governments. Wastewater is cleaned to the highest Australian standards, undergoing eight extensive filtration and purification processes including Membrane Bioreactor (MBR), Ultraviolet (UV) and Reverse Osmosis (RO).

Purification Steps

  1. Wastewater screening
  2. Anaerobic processing
  3. Aerobic processing
  4. Chemical treatment
  5. Membrane filtration
  6. Ultraviolet disinfection
  7. Reverse osmosis
  8. Chlorination

Wastewater Screening

Plastics and rubbish are taken out of the wastewater.


Anaerobic Processing

After the wastewater is screened it enters the biological processing tank for anaerobic processing. Natural bugs break down the wastewater.


Aerobic Processing

Air is added to the wastewater, creating new bugs which continue the break down process.


Chemical treatment

Four chemicals - Sodium Hydroxide, Sodium Hypochlorite, Aluminum Sulphate and Acetic Acid - are added at different stages if required during processing.


Membrane Fibres

Purified water is sucked through microscopic membranes that block out bugs - removing bacteria, pathogens and all other impurities. The holes in the fibres are so tiny, bacteria and viruses are unable to penetrate and are forced out keeping the recycled water clean.



Water goes through the Ultraviolet purification process neutralising any remaining impurities.


Reverse Osmosis

Water then moves through another membrane filtration technology known as Reverse Osmosis (RO). RO removes small molecules, ions and salts from the water, improving quality.



Chlorine is added to the water for the final purification process.

Drinking Water

Central Park Water also provides drinking water to homes, shops and offices. Our water comes from Sydney’s dams and the Sydney Desalination Plant.