A method for automated cleaning of a filter basket in a bioreactor includes determining permeability of the filter basket. A control unit controls a suction unit for suctioning a residual liquid from the liquid tank, a liquid metering unit for dispensing a liquid having a predetermined liquid volume into the filter basket controls the suction unit to empty the liquid tank by suctioning a filtered liquid volume, measures the volume of the suctioned liquid volume, and sending a first measurement signal to the control unit. The control unit determines a permeability quotient from the volume of the extracted filtered liquid volume to the volume of the dispensed predetermined liquid volume and compares the permeability quotient with a permeability threshold. The control unit then controls a cleaning unit to perform a cleaning process of the filter basket if the permeability quotient is below the permeability threshold.

A normal flow filtration system having a housing with one or more filters contained within a bowl and attached to the outlet of the system. Liquid enters the bowl, contacts the surfaces of the one or more filters. Impurities are trapped in the filter and the filtered liquid flows through to the outlet. Parameter(s) such as flow rate, transmembrane pressure drop and/or time are measured and when met, filtration ceases. A backflushing occurs through the filter(s) so as to remove the impurities from the filter. This backwashed material is directed to an outlet of the bowl that is connected to a drain. Additionally a port formed in the side of the housing adjacent an outer surface of the filter(s) can be used to provide a lateral washing of the filter(s). The system is then recirculated in a downstream manner to reestablish equilibrium and filtration is then restarted.

The present invention relates to a rotary screening apparatus, and more particularly, a rotary screening apparatus which is installed in an open channel such as drain pump station, water supply intake station, irrigation channel, sewage treatment plant and dam etc. to allow smooth removal of inclusion.

A control mechanism for self-cleaning filtration systems. One embodiment is a controller for a filtration system that comprises a suction scanner and a screening element having modifiable respective locations therebetween. The controller comprises an input terminal for receiving a relative location signal and additional a differential pressure input terminal. The controller monitors differential pressure and outputs an activation signal after the differential pressure has exceeded a threshold value. The controller outputs a termination signal based on the relative location signal. Another embodiment is a filtration system that comprises: a screening element located within a filtration chamber, and a suction scanner for self-cleaning thereof. A location tracker communicates to a switching mechanism during self-cleaning sessions a signal indicative of a location of the suction scanner with respect to the screening element. The switching mechanism automatically terminates self-cleaning sessions based on the signal.

A self-cleaning pool or spa filter system having a filter body housing a set of filter cartridges, each filter cartridge rotatably connected to a filter holder, a spray manifold having an inlet for receiving water from a pump and a plurality of sprayers, a shaft connected to the filter holder and a motor, which can rotate the shaft and thus the filter holder, causing the set of filter cartridges to rotate about the shaft, exposing lengthwise each filter cartridge to the sprayers; a sun gear attached to the first shaft; and a set of planet gears, each planet gear being concentrically associated with one filter cartridge and engaged by the sun gear, causing transfer of a rotational movement of the sun gear to each planet gear and to each filter cartridge, causing each filter cartridge to rotate, exposing the entire circumference of each filter cartridge to the plurality of sprayers.

A spiral seal continuous discharge filter for supercritical water treatment process is provided, including: a filter chamber and a motor 1 provided on a top of the filter chamber; wherein a liquid inlet is provided on an up portion of a wall of the filter chamber, a filter screen is provided in the filter chamber, a purified liquid outlet is provided on an external side of the filter screen, a vertical discharge pipe is provided on a bottom portion of the filter chamber, a driving rod rotated by driven of the motor is provided on a central axis of the filter chamber, a plurality of electric scratch brushes are provided on the driving rod, and a two-stage spiral blade unit is provided on a bottom of the driving rod.

A screening system for solid removal includes a housing and a screen positioned within the housing. A flow inlet is operatively connected to an interior chamber defined by the screen. A sump is downstream from the flow inlet for capturing solids that do not pass through the screen. A flow outlet is downstream from the screen in fluid communication with the flow inlet. A moveable cleaning assembly may be positioned either within a perimeter of the screen, around the perimeter of the screen or both. The moveable cleaning assembly is moveable with respect to the screen.

Pond filter unit and a method for operating a pond filter unit (1). A control unit (12) controls the operation of the pond filter unit (1), including the cleaning cycle of the filter (2′, 2″, 2′″). The pond filter unit (1) further comprises one or more plugs (14) for connecting one or more auxiliary devices, such as a separate pump, one or more additional pond filter units, illumination devices/lamps, air pumps, and/or feed automats. The control unit (12) of the pond filter further controls the one or more auxiliary devices connected to the plugs (14), such as pumps, air pumps, automatic feeding devices based on input settings for each of the one or more auxiliary devices. The control unit (12) further controls the cleaning cycle for cleaning of the filter (2) in the vessel (3). The cleaning cycle comprises a sequence of backwash and/or a mechanical filter cleaning sequence where a filter cleaning motor unit (6) rotates the filter cleaning device (7) in the vessel. During backwash, the valve (8) directs the water to the waste water outlet (11). The filter unit allows to control the one or more auxiliary devices by the pond filter control unit (12), and to coordinate the control of the additional devices in relation to the control of the filter.

A dishwashing appliance with a shrouded filtration assembly for removing dishwashing sediment from recirculated dishwashing fluid is provided. The dishwashing appliance may include a tub, a spray system, a recirculation pump, a drainage pump, and a shrouded filtration assembly in fluid communication with the spray system, the recirculation pump, and the drainage pump. The shrouded filtration assembly may include a lid, a filter frame, and a sump housing.

The present invention is a filter cleaning stand which provides a solution to the problem of convenient cleaning of a cartridge filter while also containing the wastewater generated while cleaning the cartridge filter. The core components of the invention are a base, a raised platform and a wall that partially encloses the filter. Generally speaking, the components are configured as follows: the raised platform is above the base and arranged to support a filter and allow water to pass under the raised platform, and the wall is above the base and is arranged to partially enclose the filter on the raised platform.