High recovery saves water, but the salts become concentrated on the concentrate side, increasing the risk of scaling (CaCO₃, CaSO₄, silica). 60–75% is typical for well water and 35–45% for seawater. Higher rates can be reached with antiscalant dosing and pre-softening. For the calculation, see the RO calculator.
Technical glossary· Membrane technologies
Recovery Rate
Short definitionThe ratio of product water to feed water in an RO system; at 70% recovery, 100 litres of feed water yield 70 litres of product and 30 litres of concentrate.
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