Abstract: A liquid-cleaning filter system with distillation capability has twin permanent filter assemblies, each utilizing a wire mesh filter cartridge which is backwashed using an internal sprayer nozzle assembly. During the normal operation of the filter cartridge, which is located in a pressurizable inverted bell housing, contaminates are filtered through a sheet of wire mesh arranged in a star configuration on a frame structure within the filter cartridge. The liquid filtering system is especially adapted for use in dry cleaning operations where a layer of diatomaceous earth and a layer of activated carbon deposited are on the wire mesh at the start of normal forward flow. Contaminates collect on this filter bed, thus cleaning the dry cleaning solvent.

Abstract: An aerobic sewage treatment method and system includes a tank divided by a baffle into at least a treatment chamber and a settling chamber. A return flow pipe at the normal liquid level, from the settling chamber into the aerating chamber, has on its treatment chamber side a tee fitting aimed to the side of the treatment chamber, along the baffle separating it from the settling chamber. Floating particles near the settling chamber discharge thus flow back into the treatment chamber for further aeration and reduction. Flow through such return pipe is induced by a stream from the aerating unit directed against the surface of the turned end of the return pipe, whereby some of that flow moves along the pipe and draws a return flow into the aerating chamber. The stream for causing this return flow is obtained from the discharge of an improved aerating unit which discharges a few directed streams, as opposed to an annular stream of greater velocity but lesser total mass flow.

Abstract: The method and apparatus of the present invention comprise an elongated auger housing having a rotatable auger therein. Augers are provided for delivering sludge and an additive such as cement kiln dust to the intake end of the mixer housing. An auger within the mixer housing conveys the material to the discharge end of the housing, and at the same time mixes the materials together.

Abstract: An apparatus for electrokinetically separating drilling mud into liquid and solid phases comprising a casing (1) having an inlet (2) for drolling mud and outlets (3,13) for separated phases thereof and accommodating electrodes connected to the negative terminal and to the positive terminal, respectively, of a d-c source (8). The electrode connected to the negative terminal of the d-c source (8) comprises a conveyor screw (4) which has a cylindrical portion (5) and an adjacent conical portion (6). The casing (1) functions as the electrode connected to the positive terminal of the d-c source (8) and has respective cylindrical (10a, 10b, 10c) and conical (11) portions. The outlet (13) for solid phase of drilling mud is provided at the end of the conical portion (11) of the casing (1). There is provided a receptacle (14) for collecting solid phase of drilling mud communicating with the outlet (13) for solid phase of drilling mud provided in the casing (1).

Abstract: A filter for removing solids from a liquid of the type wherein a rotatable basket or drum has media inside straining from inside out. A power operated conveyor is mounted in the drum above the axis of rotation for receiving and positively removing solids. Thus, a liquid level is possible above the axis of rotation but below the conveyor so that a large filter area is in contact with the liquid while not interfering with the operation of the conveyor. A retractable scoop is provided for positively delivering the solids to the conveyor with an alternate sealing arrangement. A discharge ramp is carried adjacent an end of a baffle which extends above a liquid inlet upwardly toward the conveyor and is spaced from an inner wall of the drum to collect solids therebetween and accommodate the scoop for their removal. An improved means for equalizing the distribution of the liquid within the drum is also provided.