A rotary disc filter having a backwash system that includes a series of feed pipes that project into and between successive filter discs that are mounted on a rotatable drum. Connected to an outer terminal end portion of the feed pipes is a series of nozzle holders. Each nozzle holder includes a main conduit, a series of branch conduits that project outwardly from the main conduit, and a connector for connecting the nozzle holder to a respective feed pipe. A series of detachable nozzles are secured to the outer terminal ends of the branch conduits.

This invention relates generally to a filtration process and apparatus for separating valuable or harmful process liquids from mixtures or slurries that contain such liquids and solid particles. In particular, the invention relates to a filtration process for separating Process Liquid from a feed slurry that comprises a mixture of the Process Liquid and solid particles, the process employing a Sweep Liquid that is less dense than the Process Liquid.

This invention relates generally to a filtration process and apparatus for separating valuable or harmful process liquids from mixtures or slurries that contain such liquids and solid particles. In particular, the invention relates to a filtration process for separating Process Liquid from a feed slurry that comprises a mixture of the Process Liquid and solid particles, the process employing a Sweep Liquid that is less dense than the Process Liquid.

The invention relates to a device for the microfiltration, ultrafiltration, or nanofiltration and/or the emulsification of liquids. The device has at least one rotatable membrane medium, which has a filtrate/permeate side or a side facing a dispersed phase and a concentrate/retentate side or a side facing a coherent phase and which can be rotated in a container in order to produce a vacuum on an unfiltered liquid side or the side facing the coherent phase on partial regions of the at least one rotatable membrane medium in the container in small time segments at a frequency of 1-100 Hz. Said container has at least one feed for an unfiltered liquid or the coherent phase, at least one overflow for an unfiltered liquid or an emulsion, and at least one rotatable channel for filtrate/permeate drainage or feed of the dispersed phase, and a suction device, in particular in the manner of a suction strip or nozzle plate. The suction device has at least one suction strip or nozzle plate arranged parallel to the rotatable membrane medium or is such a suction strip or nozzle plate, which is attached at a distance of less than 0.1 to 10 mm from the membrane medium, and thus cleans non-permeating materials collected on the unfiltered liquid side during a filtration process from a surface of the membrane medium, or promotes drop formation of the dispersed phase exiting from a membrane surface on the side facing the coherent phase during an emulsification process. The invention further relates to uses of the device.

The invention relates to a device for the microfiltration, ultrafiltration, or nanofiltration and/or the emulsification of liquids. The device has at least one rotatable membrane medium, which has a filtrate/permeate side or a side facing a dispersed phase and a concentrate/retentate side or a side facing a coherent phase and which can be rotated in a container in order to produce a vacuum on an unfiltered liquid side or the side facing the coherent phase on partial regions of the at least one rotatable membrane medium in the container in small time segments at a frequency of 1-100 Hz. Said container has at least one feed for an unfiltered liquid or the coherent phase, at least one overflow for an unfiltered liquid or an emulsion, and at least one rotatable channel for filtrate/permeate drainage or feed of the dispersed phase, and a suction device, in particular in the manner of a suction strip or nozzle plate. The suction device has at least one suction strip or nozzle plate arranged parallel to the rotatable membrane medium or is such a suction strip or nozzle plate, which is attached at a distance of less than 0.1 to 10 mm from the membrane medium, and thus cleans non-permeating materials collected on the unfiltered liquid side during a filtration process from a surface of the membrane medium, or promotes drop formation of the dispersed phase exiting from a membrane surface on the side facing the coherent phase during an emulsification process. The invention further relates to uses of the device.

A liquid extraction assembly for extracting liquid from a mass including a housing having an inlet, an outlet, and a path between the inlet and the outlet. The housing has the mass forced into the inlet to move the mass from the inlet to the outlet. The housing includes a rotating screen adjacent the path, with the rotating screen defining one wall of the path. The rotating screen includes a plurality of openings located at the path. Pressure from mass forced into the inlet presses the mass against the openings of the rotating screen to thereby force at least a portion of liquid in the mass to pass through the openings of the rotating screen. The housing has at least one stirring arm extending into the path between the inlet and the outlet, the at least one stirring arm stirring the mass in the path.

A liquid extraction assembly for extracting liquid from a mass including a housing having an inlet, an outlet, and a path between the inlet and the outlet. The housing has the mass forced into the inlet to move the mass from the inlet to the outlet. The housing includes a rotating screen adjacent the path, with the rotating screen defining one wall of the path. The rotating screen includes a plurality of openings located at the path. Pressure from mass forced into the inlet presses the mass against the openings of the rotating screen to thereby force at least a portion of liquid in the mass to pass through the openings of the rotating screen. The housing has at least one stirring arm extending into the path between the inlet and the outlet, the at least one stirring arm stirring the mass in the path.

A frame-type disc filter (100) is provided with a bypass water collector (33) disposed adjacent an inlet to the disc filter. Influent water overflows the inlet into the bypass water collector. A conduit is communicatively connected to the bypass water collector for directing the bypass water from the frame-type disc filter to an effluent channel that is independent of the frame-type disc filter.

A frame-type disc filter (100) is provided with a bypass water collector (33) disposed adjacent an inlet to the disc filter. Influent water overflows the inlet into the bypass water collector. A conduit is communicatively connected to the bypass water collector for directing the bypass water from the frame-type disc filter to an effluent channel that is independent of the frame-type disc filter.

According to various aspects and embodiments, a system and method for two-stage filtration is provided. The system includes an inlet fluidly connectable with wastewater, a first stage filter assembly that is fluidly connectable with the inlet and has a rotary drum with a filter surface configured for radially inward fluid flow, a second stage filter assembly that is fluidly connectable with the first stage filter and has a plurality of filter discs configured for radially outward fluid flow, and an outlet fluidly connectable with filtrate generated by the second stage disc filter assembly.