Abstract: An oil-water mixture is introduced into a horizontal trough which is in a container and has baffles directing flow upwardly toward an opening in the container to a trap on the top of the container. Oil separates from the water as it flows along the baffles and moves by gravity separation up into the trap. An interface sensor in the trap opens an oil outlet from the trap whenever a sufficient quantity of oil accumulates. The water flows down from the upper part of the container through a coalescing filter to a water outlet located in the lower part of the container, being a three-stage separator.

Abstract: The specification discloses an incinerator toilet having a seat mounted on a heat insulated bowl with an upper tapered baffle in the bowl extending down to a lower tapered baffle. A fuel nozzle from a fuel pump injects fuel chordally into the space between the lower baffle and the bowl past a spark plug, which ignites the fuel, air being blown in with the fuel by a lower blower having an outlet coaxial with the nozzle. A second blower blows air into an annular passage at the upper end of the bowl, and this air travels into and down the upper baffle. The air and the products of combustion are exhausted through an exit port through the bowl positioned above the lower baffle. When a cover is placed in the opening to close a limit switch and a push button is held closed, an igniter circuit, the fuel pump motor and the lower blower are energized. If flame is present, the circuit is locked in by a timer and the upper blower is energized.

Abstract: Oily water is introduced into the lower ends of outer vessels and flows upwardly in annular spaces between the outer vessels and inner separating vessels and into the inner vessels below inwardly spaced, shallowly cupped, annular separating discs. Larger particles of oil flow past the discs directly to the tops of caps on the outer vessels. The smaller particles of oil coalesce on and flow slowly along the bottoms of the discs to central openings in the discs, and up into the caps. The oil flows out of the caps when valves are opened by ultrasonic sensing probes actuated by accumulation of predetermined quantities of oil in the caps. The water flows out of outlets positioned near the bottoms of the inner vessels. In an alternate embodiment, a filter member of foam plastic is inclined to the flow toward the water outlet and coalesces any oil yet remaining in the water.