If the filtration process used sufficiently cleans up the water it might be very useful for agriculture in this very sunny, and dry, part of the world.

In other parts of the world, where it’s colder, geothermal waste water is quite useful for greenhouse heating. Just run it through tubes buried in the soil before returning it to the geothermal well.

And it can be useful for building heating. Geothermal is likely to become very useful in far northern climates where their is a need for both electricity and a cheap heat source for residences and commercial buildings. Double use from a single well.