Batch RO can help lower the cost of water compared to conventional seawater RO.


In large seawater RO plants, the construction of feed intake and brine outfall structures can cost up to $100M, dominating the levelized cost of water. With its inherent energy efficiency, batch RO changes the calculus of the recovery vs. energy trade-off.

Water-wise mode reduces brine discharge by 10-40%:

  • Smaller intake and outfall structures for new plants
  • Increased production capacity for existing plants
  • Reduced pretreatment costs

1.8 kWh/m3

For a long time, 2 kWh/m3 has been the floor for RO energy consumption. We avoid excess pressurization and track the osmotic pressure curve to take RO one step closer towards the thermodynamic limit.

Energy efficiency mode offers the ultimate specific energy consumption:

  • Energy savings of an infinitely-staged” RO system
  • Energy recovery not required
  • Unlock additional savings with more permeable membranes


In conventional RO, the membranes at the front produce 5x more freshwater those in the back. This imbalance limits membrane productivity, but with batch RO we can produce more water with less membranes.

Increased intensity mode boosts membrane productivity (i.e. flux) by 30-50%:

  • Ability to boost water production to meet demand
  • Reduced CAPEX (less membranes, PVs, piping)
  • Less battery capacity for renewable-powered plants

96 Holton Street

Boston, MA 02135