The OARO Process

OARO (Osmotically Assisted Reverse Osmosis) is a brine concentration process in which salinity is maintained on both sides of a membrane at different concentration levels, reducing the osmotic pressure needed to drive the water from the higher salinity to the lower salinity perneate.

Like normal Reverse Osmosis processes, OARO uses a high-pressure pump to drive desalinated water through the membrane, by overcoming the osmotic pressure differential between the feed and the permeate side.

The system operates at RO (Reverse Osmosis) pressure resulting in low power consumption versus other traditional methods, and producing desalinated water and near saturation brine, which can be crystalized into high purity salt at competitive prices.

The osmotic-pressure differential between the feed and permeate sides allows continual concentration of ultra-saline feeds at pressures lower than 70 bars, meaning OARO’s maximum recovery is not limited by the burst pressure of standard RO membranes.

  • Energy consumption is lower than any other available commercial solution
  • Desalinated water recovery is higher, lowering the cost of zero liquid discharge (ZLD) solution.
  • Land footprint is reduced by up to 70% compared to solar salt farming to minimize the Brine and/or to produce salt
  • The higher efficiency of the OARO saves up to 70% in capital costs and 60% on operational costs versus other available commercial solutions.

The Hyrec Process