Geothermal energy could help ease water crisis

The Centre’s researchers found that Queensland has ample geothermal energy resources to power thermal desalination plants and provide clean water for small towns suffering from water shortages.

Prof Hal Gurgenci, centre director, said the geothermal-powered desalination systems could play a pivotal role in helping ease the water crisis facing small towns.

He said: ‘This may not be the solution for large-scale desalination needed for cities such as Brisbane, but should have a significant contribution in smaller towns such as Dalby and Maleny, which have recently experienced extreme water shortages.

‘Overseas experience suggests that these systems can be scaled up to provide 10 to 20 kilolitres of water per day while also helping greenhouse plant growing.’

Queensland’s geothermal resources range from high-temperature Hot Fractured Rock (HFR) of the Cooper, Eromanga and possibly Drummond Basins to Hot Sedimentary Aquifiers (HSA) of the Great Artesian Basin.

Gurgenci added that while some of these resources may not be hot enough for electricity generation, they would be a perfect fit for thermal desalination of underground brackish aquifers.