A grease separator works purely physically, applying gravity (difference in density), i.e. heavy wastewater contents sink to the bottom and light substances such as animal oils and fats rise to the top of the separator. The treated wastewater is then discharged into the sewers via the drainage outlet pipe.
With grease separators for full disposal, sludge and grease collected in the separator container must be picked up by a disposal contractor at certain intervals or as required, and then treated collectively.
