Watercare’s sewage vision
Aucklanders’ future water supply may come in the form of treated sewage.
At a recent forum on the wellbeing of the Manukau Harbour Raveen Jaduram, the chief executive of council controlled organisation Watercare, said it was looking at the possibility of reusing treated sewage for either human consumption, industry, agriculture or reinjection into the aquifer.
‘‘The challenging bit for us remains the effluent,’’ Jaduram said.
‘‘In the rest of the world where they have urgency and pressures for water, they’re now reusing their recycled, treated wastewater.’’
In 2013 the United Nations said that by 2030 nearly half the world’s population could be facing water scarcity.
To combat scarcity issues, treated sewage was already being used in Australia, Belguim, Singapore and the United States.
Treated wastewater has had the organic and inorganic solids separated from a liquid waste stream. Currently, once treated it is discharged into waterways.
Watercare communication manager Rachel Hughes said its current infrastructure plan, which goes to 2036, did not plan for supplying the public with treated wastewater.
Hughes said the potential use of treated wastewater as a water source was well acknowledged.
Raveen Jaduram says other countries are already reusing treated wastewater.