Perth Seawater Desalination Plant

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Perth Seawater Desalination Plant
Perth Seawater Desalination Plant is located in Perth
Perth Seawater Desalination Plant
Location within Western Australia
Desalination plant
LocationKwinana, Western Australia
Coordinates32°12′12″S 115°46′24″E / 32.203310°S 115.773282°E / -32.203310; 115.773282Coordinates: 32°12′12″S 115°46′24″E / 32.203310°S 115.773282°E / -32.203310; 115.773282
Estimated output144 megalitres per day
Extended output250 megalitres per day
CostA$389 million
Energy usage180 GWh/year
Energy generation offsetEmu Downs Wind Farm
TechnologyReverse Osmosis
Percent of water supply17% of Perth
Operation dateNovember 2006 (November 2006)

The Perth Seawater Desalination Plant, located south of Perth, Western Australia, turns seawater from Cockburn Sound into nearly 140 megalitres of drinking water per day, supplying the Perth metropolitan area.[1]

The salt water reverse-osmosis (SWRO) plant was the first of its kind in Australia, and became operational in 2006. It covers several acres in an industrial park near the suburb of Kwinana Beach.[2] Electricity for the plant is generated by the 80 MW Emu Downs Wind Farm located in the state's Midwest region near Cervantes. The wind farm contributes 270 GWh/year into the general power grid, more than offsetting the 180 GWh/year requirement from the desalination plant.[3]

The desalination plant, with 12 SWRO trains with a capacity of 160 megalitres per day and six BWRO (brackish water) trains delivering a final product of 144 megalitres per day, was expected to have one of the world’s lowest specific energy consumptions, due in part to the use of pressure exchanger energy recovery devices supplied by Energy Recovery Inc. The devices are isobaric chamber types which recover energy in the brine stream and deliver it to water going to the membrane feed at a net transfer efficiency at up to 98%.

As a condition of its continued operation, the Perth plant has a comprehensive environmental monitoring program, measuring the seawater intake and brine outfall.[4]

Excess water from the plant is stored in the hills dams.

In early 2008, the plant was shut down on two occasions due to reduced dissolved oxygen levels in Cockburn Sound.[5]

See also[edit]


  1. ^ Perth Seawater Desalination Plant, Seawater Reverse Osmosis (SWRO), Kwinana, Australia
  2. ^ WEBB, T. (23 November 2005). "KWINANA INDUSTRIAL ESTATE" (PDF). kwi04_001.dgn. Department of Industry and Resources. Retrieved 2010-02-06.
  3. ^ Australia Turns to Desalination Amid Water Shortage
  4. ^ Australia's First Big Plant Thinks Green Archived 2014-12-18 at the Wayback Machine
  5. ^ Press release Archived 2009-01-14 at the Wayback Machine, July 6, 2008

External links[edit]