You need to remove the oil ...
Published by Sean Roop, Industrial and Engineering Consultants, LLC - Senior Water and Process Consultant
You need to remove the oil upstream or you will simply foul your beds with free O/G. There is a myriad of ways to do it depending on your stream and your CAPEX for buying new equipment. Bottom line to the question is that you WILL foul out the filter (s). Hope this helps. I wish I had better news for you. Best, Sean.