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sci.reverse-osmosis-recovery-rejection Calculator
Calculates reverse osmosis membrane rejection R = 1 − Cp/Cf, recovery r = Qp/Qf, and concentrate concentration from mass balance. Seawater RO membranes reject 99.6–99.8% of NaCl — at 50% recovery, concentrate salinity doubles; brine disposal is the major environmental constraint for inland RO plants.
Inputs
Cf Mgl
Amount of solute per unit volume. Higher concentration = more solute dissolved.
Cp Mgl
Amount of solute per unit volume. Higher concentration = more solute dissolved.
Qf M3H
Reference formula or conversion factor shown for context.
Qp M3H
Reference formula or conversion factor shown for context.
Results
salt rejection R (%)
Sample size or count used in the calculation.
recovery Y (%)
Reference formula or conversion factor shown for context.
concentrate flow (m³/h)
The value at the specified point or condition.
concentrate concentration (mg/L)
The proportional relationship between two quantities.
concentration factor CF
A dimensionless multiplier applied in the calculation.
R = (1 − Cp/Cf)×100 | CF = Qf/Qc
Reference formula or conversion factor shown for context.