Treatment & filtration
Reverse osmosis recovery and rejection
Calculate recovery ratio, concentrate flow, concentration factor and salt rejection for an RO system.
Result
Recovery ratio
30.0%
Concentrate flow
70.0l/h
Waste per litre of product
2.33litres
Concentration factor
1.43
How much sparingly soluble salts are concentrated in the brine.
Salt rejection
96.00%
A well-performing membrane exceeds 96%. A falling value indicates membrane damage or fouling.
Method
Recovery = permeate ÷ feed. Concentrate = feed − permeate. Concentration factor = 1 ÷ (1 − recovery). Salt rejection = (1 − permeate TDS ÷ feed TDS) × 100.