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RO System Maintenance & Operation:  System Recovery

System recovery should be monitored regularly to ensure that the system membranes are operating properly. The percent of recovery is the percentage of the feedwater which becomes product water. To find system recovery take the ratio of permeate flow to feed flow(Feed flow = Permeate flow + Concentrate flow).

Shown As:

% Recovery = (Product flow rate Feed flow rate) 100

Feed Flow = Permeate Flow + Concentrate Flow

Example: If permeate flow is 10 gallons/minute and concentrate flow is 15 gallons/minute, then

Feed Flow = 10 + 15 = 25 GPM

% Recovery = (10/25) x 100 = 40%

A higher recovery rate means less concentrate going to the drain. A higher recovery can also cause
soluble salts to precipitate out of the concentrate and onto the membrane surface.

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 Operating Do's & Don'ts System Recovery Membrane Foulant Identif. System Troubleshooting Res. RO Troubleshooting Operation Parameters Record Keeping Pre-Start-up Check System Shut-Down Flocon Antiscalant Selection

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All Content on this site is  intended for informational purposes for experienced water treatment professionals only.  Applied Membranes, Inc. does not assume any liability for any damages caused by the misapplication or misinterpretation of any of the information contained on this website.
Applied Membranes, Inc. 2007