Oils and grease are present in several domestic drains and are typically present in much water coming from industrial waste water.
Its elimination seems to be necessary, even if with different targets, to separate the oily phase from the watery one, before the introduction in any natural water body or before proceeding to the purifying treatment of the waste water, if that contains oils and hydrocarbons. In practical applications, two typology of oil separators can be distinguished:
- Static oil separators by gravity with atmospheric pressure
- Oil separators by coalescence