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Wyuna Separation Technology

Oil Water Separator Specialist

What is Oil and Grease

  • O&G consists of a group of related constituents that are of special concern in wastewater treatment due to their unique physical properties and highly concentrated energy content.
  • The term O&G (oil and grease) has become the popular term replacing the term FOG (fat, oil and grease), although both terms refer to the same wastewater constituents.
  • O&G constituents in wastewater can come from plants and animals (e.g, lard, butter, vegetable oils and fats) as well as petroleum sources (e.g., kerosene, lubricating oils).
  • O&G are generally hydrophobic (i.e., “water-hating”) and thus have low solubility in wastewater, resulting in relatively low biodegradability by microorganisms.
  • O&G becomes more soluble (i.e., more easily dissolved) in wastewater at high temperatures and will form emulsions (i.e., oil-water mixtures) that will often separate back out of wastewater as temperatures become cooler; thus, O&G are notorious for causing sewer collection system problems (e.g., blockages, pump failures).
 
WARNING! Since O&G adheres to plastic, only glass sample collection containers can be used to collect O&G samples!