Description
Return membrane rejection, flow recovery and solute transmission.
A process stream can be described on mass, mole, phase or solvent bases, which are not interchangeable. Lever rules, partition factors and operating-line terms assume compatible composition definitions and an appropriate physical model; a local balance does not determine equilibrium properties or a complete separation design.
Return membrane rejection, flow recovery and solute transmission.
When to use this tool
Use Membrane Solute Rejection Concentration Ratio when checking the stated stream composition, phase or separation-model term.
How to use the tool and how it works
- Enter feedConcentration, permeateConcentration, feedFlow, permeateFlow. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read observedRejection, recoveryFraction, soluteTransmissionRate. Use the output convention below.
Return membrane rejection, flow recovery and solute transmission. Require feedConcentration/feedFlow > 0, permeateConcentration >= 0 and permeateFlow in [0,feed]; rejection = 1-Cp/Cf, recovery = Qp/Qf, transmissionRate = Cp*Qp.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| feedConcentration | Feed Concentration | Required. Finite number; strictly above 0. |
| permeateConcentration | Permeate Concentration | Required. Finite number; minimum 0. |
| feedFlow | Feed Flow | Required. Finite number; strictly above 0. |
| permeateFlow | Permeate Flow | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| observedRejection | 1-permeateConcentration/feedConcentration; can be negative. | Required. Finite number. |
| recoveryFraction | Recovery Fraction | Required. Finite number. |
| soluteTransmissionRate | Solute Transmission Rate | Required. Finite number. |
{
"input": {
"feedConcentration": 10,
"permeateConcentration": 2,
"feedFlow": 100,
"permeateFlow": 20
},
"output": {
"observedRejection": 0.8,
"recoveryFraction": 0.2,
"soluteTransmissionRate": 40
}
}Limitations and assumptions
- Rejection may be negative when permeate exceeds feed concentration; actual membrane selectivity, concentration polarization and performance are not inferred.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use verified equilibrium and material-property data on consistent bases and solve the complete process model for actual separation or equipment decisions.
References
Similar or alternative tools
- Liquid Liquid Partition One Stage Term
Return one-stage liquid partition concentrations.
- Crystallization Solubility Cooling Yield Term
Return a cooling-crystallization mass-yield term.