Kitchen grease removal system

An oil/grease separation apparatus comprising:

• a chamber for receiving a liquid flow containing water, oil/grease and gross solids, the chamber including an inlet section, a downstream section and an outlet in an outlet section,
• the inlet section being separated from the downstream section by a weir including a first wall extending upwardly from the bottom of the chamber to a top above the outlet and a second wall extending downwardly from a height above the liquid level to a submerged level, whereby a higher static water level is maintained in the inlet section than the downstream section, to facilitate one-way passage of oil/grease from the inlet section to the downstream section,
• a water jet eductor having an extraction port in a lower portion of the inlet section,
• the inlet section including an inlet port, a strainer separating the inlet port and the top of the first wall to inhibit passage by solids to the downstream section, and a bottom which slopes downwardly toward the extraction port of the water jet eductor, and
• an oil/grease separator located in the downstream section for removing oil/grease from water held in the downstream section,
• whereby the gross solids entering the chamber settle in the inlet section for periodic removal with some water by the water jet eductor, oil/grease and water entering the chamber pass to the downstream section where the oil/grease is removed from the water, and the residual water exits the chamber through the outlet section.

An oil/grease separation method comprising:

• introducing a liquid flow containing water, oil/grease and gross solids into a chamber having an inlet section, a downstream section and an outlet in an outlet section,
• permitting the gross solids entering the inlet section to settle,
• periodically actuating a water jet eductor to remove the settled solids from the inlet section,
• permitting oil/grease and water to pass from the inlet section to a downstream section,
• removing oil/grease from the water in the downstream section, and
• permitting the residual water to exit the chamber through the outlet.

An oil/grease separation method comprising:

• introducing a liquid flow containing water, oil/grease and gross solids into a chamber having an inlet section, a downstream section and an outlet in an outlet section,
• straining gross solids from the liquid flow in the inlet section to prevent passage of solids to the downstream section,
• permitting the gross solids entering the inlet section to settle,
• periodically actuating a water jet eductor to remove the solids from the inlet section,
• permitting oil/grease and water to pass from the inlet section to a downstream section over a weir that maintains a higher static water level in the inlet section than the downstream section,
• removing oil/grease from the water in the downstream section, and
• directing the residual water exiting the chamber through the outlet section to a grease trap and directing the solids and water removed from the inlet section during the water jet eductor actuation step in a path bypassing the grease trap.

A method for separating oil/grease from an effluent flow comprising:

• the step of holding an effluent flow containing oil/grease water and gross solids,
• the step of permitting the gross solids to settle,
• the step of removing the settled gross solids with an eductor flow, and
• the step of separating oil/grease from the effluent flow.

An oil/grease separation apparatus comprising:

• a chamber for receiving a liquid flow containing water, oil/grease, and gross solids,
• a water jet eductor including a water supply line with a controllable water supply and including a solids extraction port in a lower portion of the chamber, and
• an oil/grease separator located in the chamber for removing oil/grease from water held in the chamber,
• whereby the gross solids entering the chamber settle in the chamber for periodic removal by the water jet eductor, oil/grease and water entering the chamber pass to the oil/grease separator where oil/grease is removed from the water, and the residual water exits the chamber.

An oil/grease separation method comprising:

• introducing a liquid flow containing water, oil/grease and gross solids into a chamber,
• permitting the gross solids entering the chamber to settle,
• periodically actuating a water jet eductor to remove the settled solids from the chamber,
• removing oil/grease from the water in the liquid flow, and
• permitting the residual water to exit the chamber.