Water­care’s sewage vi­sion

Central Leader - - FRONT PAGE - JAMES PASLEY

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.

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