Engineering & Physics SuiteStep-by-Step RO Calculations
Industrial RO & Water Treatment Calculators
Interactive engineering calculators with exact formulas, derivations, and step-by-step guides for Recovery, Concentrate Flow, TDS & EC, SDI Silt Density, Salt Rejection, and Chemical Dosing.
RO Recovery & Concentrate Parameters
How to Calculate Recovery & Concentrate Flow:
1. Recovery Rate (%): Recovery = (Permeate Flow / Feed Flow) × 100
2. Concentrate Flow: Concentrate = Feed Flow - Permeate Flow
3. Concentration Factor (CF): CF = 1 / (1 - (Recovery / 100))
Hydraulic Balance ResultsOptimal Industrial Brackish
System Recovery Rate
75%
Fraction: 0.750Concentrate Discharge Flow
137.5 GPM
Waste stream volumeConcentration Factor (CF):
4x
Brine mineral concentration multiplierReject-to-Product Ratio:
0.33:1
Gal brine per 1 gal permeateExact Step-by-Step Derivation for Active Values:
Step 1: Recovery % Calculation:
Recovery = (412.5 GPM / 550 GPM) × 100 = 75%
Step 2: Concentrate Flow Mass Balance:
Concentrate = 550 GPM - 412.5 GPM = 137.5 GPM
Step 3: Concentration Factor (CF):
CF = 1 / (1 - (75 / 100)) = 1 / 0.250 = 4x