FOG (fats, oil, or grease) separator apparatus

A FOG (Fats, Oil, or Grease) separator apparatus which includes:

• a first reservoir or chamber having a wastewater inlet configured to receive wastewater containing FOG;
• a second reservoir or chamber which is separated from the first reservoir by a first weir configured to permit overflow of at least FOG from the first reservoir to the second reservoir;
• a third reservoir or chamber separated from the second reservoir by a second weir configured to permit overflow of at least FOG from the second reservoir to the third reservoir;
• a syphon arrangement having a syphon inlet provided in the third reservoir at a first level and having a syphon outlet provided outside the third reservoir at a second level which is higher than the first level;
• and
• a pump arrangement comprising a FOG pump and a sensor provided in the third reservoir at a third level which is higher than the second level, wherein the pump has a pump inlet in the third reservoir above the first level, and wherein the pump is activated by the sensor in response to a liquid level or concentration in the third reservoir triggering the sensor.