Enter the flow rate through the membrane and the surface area of the active membrane into the calculator to determine the RO membrane flux rate.

## RO Membrane Formula

The following equation is used to calculate the flux rate of a reverse osmosis membrane.

FR = Q / A
• Where FR is the flux rate (gallons per day/ft^2)
• Q is the flow rate (gallons/day)
• A is the total area of the membrane (ft^3)

To calculate the flux rate of an RO membrane, divide the flow rate by the total area.

## What is a RO Membrane?

Definition:

An RO membrane is a type of filtering device that uses reverse osmosis to pull particles out of water.

## How to Calculate RO Membrane Flux Rate?

Example Problem:

The following example outlines the steps and information needed to calculate the flux rate of a RO Membrane.

First, determine the flow rate through the membrane. In this example, the flow rate is found to be 10,000 gallons per day.

Next, determine the area of the active membrane. In this case, the area of the active membrane is 250 square feet.

Finally, calculate the RO Membrane flux rate using the formula above:

FR = Q / A

FR = 10,000 / 250

FR = 40 gallons/day/ft^2