Abstract: A grease trap for separating waste from wastewater includes a tank having an outer wall, bottom and open top. An inlet invert in the tank receives incoming wastewater, and an outlet invert removes water from the tank. The tank has a cover on the open top, and the cover has a hatch. A barrier spans a diameter of the open top below the cover and has an opening vertically below the hatch. A divider divides the tank into an upper chamber and a lower chamber and has a hole for allowing FOG into the upper chamber from the lower chamber, the hole being colinearly aligned with the hatch and the opening in the barrier.

Abstract: An F.O.G. separation apparatus includes a tank for receiving a liquid effluent flow containing water, F.O.G., and gross solids. The tank has a chamber, an inlet in an inlet module, a downstream section and an outlet in an outlet module. The inlet module has a weir for the effluent downstream of a strainer to strain gross solids from the effluent. A pump upstream of the strainer pumps water and solids that do not pass through the strainer. The pump's rotatable vertical shaft has a motor at an upper and an impeller at the bottom. A pipe connected to the inlet module near the impeller conveys solids and water when the pump is activated and directs the solids and water to the outlet. F.O.G. and water entering the tank pass to the downstream section where the F.O.G. is removed from the water by a skimmer, and the residual water exist the tank through the outlet module.

Abstract: A grease trap for separating waste from waste water that includes grey water and FOG includes a tank having a bottom and an interior volume. An inlet invert in the tank has a discharge end for discharging waste water into the tank, and an outlet invert in the tank has a drain end for removing grey water from the tank. A first baffle across the interior volume below the discharge of the inlet invert and above the drain end of the outlet invert has a hole allowing grey water to descend through the hole to a path under the first baffle to the drain end of the outlet invert. A second baffle across the interior volume above the discharge of the inlet invert has a hole allowing FOG to float through the hole in the second baffle to collect above the second baffle.

Abstract: An F.O.G. separation apparatus includes a tank for receiving a liquid effluent flow containing water, F.O.G., and gross solids. The tank has a chamber, an inlet in an inlet module, a downstream section and an outlet in an outlet module. The inlet module has a weir for the effluent downstream of a strainer to strain gross solids from the effluent. A pump upstream of the strainer pumps water and solids that do not pass through the strainer. The pump's rotatable vertical shaft has a motor at an upper and an impeller at the bottom. A pipe connected to the inlet module near the impeller conveys solids and water when the pump is activated and directs the solids and water to the outlet. F.O.G. and water entering the tank pass to the downstream section where the F.O.G. is removed from the water by a skimmer, and the residual water exist the tank through the outlet module.

Abstract: A grease trap or solids collector for separating waste from waste water has a tank having a multilayer outer wall made of an outer layer of un-foamed plastic, an intermediate layer of foamed plastic, and an inner layer of unfoamed plastic; an inlet invert in the tank for receiving incoming waste water; and an outlet invert for removing water from the tank. An extension collar made up of segments can be included.

Abstract: A grease trap for separating waste from waste water that includes grey water and FOG includes a tank having a bottom and an interior volume. An inlet invert in the tank has a discharge end for discharging waste water into the tank, and an outlet invert in the tank has a drain end for removing grey water from the tank. A first baffle across the interior volume below the discharge of the inlet invert and above the drain end of the outlet invert has a hole allowing grey water to descend through the hole to a path under the first baffle to the drain end of the outlet invert. A second baffle across the interior volume above the discharge of the inlet invert has a hole allowing FOG to float through the hole in the second baffle to collect above the second baffle.