Membrane Separation Flux Calculator
Calculate permeate flux and membrane area for reverse osmosis and ultrafiltration processes
About this calculator
The Membrane Separation Flux Calculator is an essential tool for engineers and technicians working with reverse osmosis (RO) and ultrafiltration (UF) systems. This calculator determines critical performance parameters including permeate flux rates and required membrane surface area based on your system specifications. By accurately calculating these values, you can optimize membrane system design, predict performance, estimate operational costs, and ensure proper sizing for water treatment, desalination, and industrial separation processes.
How to use
Input your system parameters including feed flow rate, desired permeate production, operating pressure, and membrane permeability coefficient. The calculator will compute the permeate flux (volume per unit area per time) and total membrane area required. Use the results to select appropriate membrane modules and optimize your separation system design.
Frequently asked questions
What is permeate flux in membrane separation?
Permeate flux is the volume of clean water that passes through a membrane per unit area per unit time, typically measured in gallons per square foot per day (GFD) or liters per square meter per hour (LMH).
How does pressure affect membrane flux?
Higher operating pressure generally increases permeate flux in RO systems, but excessive pressure can cause membrane compaction and reduced efficiency. Each membrane has an optimal pressure range for maximum performance.
What's the difference between RO and UF flux calculations?
RO flux depends heavily on osmotic pressure and requires higher operating pressures, while UF flux is primarily driven by hydraulic pressure with less influence from concentration polarization effects.