1.  Home
  2. Whitepapers
  3. Refinery Wastewater: Oil & Grease Removal

Refinery Wastewater: Oil & Grease Removal

Download Whitepaper

Refinery Wastewater: Oil & Grease Removal

Download Whitepaper
Removal of free oil and grease from a wastewater stream reduces the potential for equipment problems to occur further downstream. There are three forms of oil encountered in wastewater treatment at a refinery. They are: 1. Free Oil or floating oil is removed by either skimming the surface in the skim tank or by gravity separation in the API separator. 2. Emulsified Oil is comprised of oil droplets in stable suspension within the wastewater. Removal requires chemical addition to lower the pH followed by addition of dissolved oxygen or nitrogen to remove the emulsified oils as theybreak free from the waste water. 3. Dissolved Oil is a true molecular solution within the water and can only be removed with biological treatment.

Download Whitepaper Now