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Effects of oil and grease on the GAC filters in wastewater treatment plants

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Q. Hello. I have a question about effects of oil and grease on the GAC (granular activated carbon) filters in wastewater treatment plants:
What is the effect of high levels of oil and grease on the GAC filters? Is it only physical clogging (like a coating on the surface of granules) or/and adsorbtion?
If it is like a coating or clogging, what is its way to remove this coating?
Thank you so much.

Moo H
- Isfahan, Iran
July 29, 2013

A. Oil will clog up your carbon very rapidly. Consider a prefilter that agglomerates the oil and keeps it away from your carbon. There is no cost effective way to regenerate your oily carbon.

James Watts
- Navarre, Florida

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