Reverse Osmosis Membrane Flux & Salt Rejection Calculator
Compute water permeate flux ($J_w$), feed osmotic pressure ($\Delta\pi$), net driving pressure ($NDP$), concentration polarization factor ($\beta$), and solute rejection ($R$).
Operating Pressures & Feed Salinity
Seawater ~35,000 mg/L, Brackish ~2,000
SWRO typically 40-50%, BWRO 75-85%
LMH/bar (L/(m²·h·bar))
Permeate Flux & Salt Rejection Performance
Permeate Water Flux (J_w)
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Nominal Salt Rejection
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Net Driving Press. NDP
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Avg Osmotic Press. Δπ
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Concentration Polariz. β
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Brine Concentrate Salinity & Energy Demand
Concentrate TDS: -- mg/L | Min Theoretical Energy: -- kWh/m³
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