Disclosed are methods for concentrating solids and removing solids from a filter medium. The method includes the step of concentrating first particles of a first solid by removing a fluid stream through a filter medium in a filter. At least some of the first particles become blocking particles that block pores of the filter medium. The method also includes the step of inserting second particles of a second solid into the filter. These second particles scrape, vibrate, agglomerate, or a combination thereof along the filter medium, thus dislodging at least a portion of the blocking particles.

This disclosure relates to filtration screens for use in a backwashable granular media bed filtration system. Drop-in retrofit kits for a backwashable granular media bed filtration system comprising one or more filtrations screens are provided herein. Such screens and kits can comprise a media support screen, a backwash filter screen, or a combination thereof. The kit can further comprise an agitator element comprising an impeller having vanes in which the impeller vane surfaces are coated with an abrasion resistant material. Associated filtration systems and processes are also described herein.

Some embodiments of the present application disclose a polishing liquid supply system. In the present application, the polishing liquid supply system includes: a polishing liquid preparation device, a cleaning liquid supply device and a filtering device, and further includes a supply pipeline connected with the polishing liquid preparation device and the filtering device and a cleaning pipeline connected with the cleaning liquid supply device and the filtering device. The polishing liquid preparation device is configured to prepare a polishing liquid and convey the prepared polishing liquid to the filtering device through the supply pipeline. The filtering device is configured to filter the polishing liquid and convey the filtered polishing liquid to a polishing device connected with the filtering device. The cleaning liquid supply device is configured to convey a cleaning liquid to the filtering device through the cleaning pipeline.

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 filter device includes a filter vessel with a fluid inlet for unfiltered liquid, a filter element in the filter vessel with a filter inlet communicating with the vessel and with a filter outlet, the filter outlet communicating via a cleaning duct and a cleaning valve with a cleaning device, the cleaning device including a cleaning chamber including a volume V0 of cleaning fluid and a pressure chamber at a starting pressure P0, communicating with the cleaning chamber for supplying cleaning fluid to the filter outlet, via the cleaning duct, a fluid supply line connected via a pump to the cleaning chamber for supplying a volume Vr of cleaning fluid to the cleaning chamber while the cleaning chamber is in open fluid connection with the pressure chamber and the cleaning valve is closed so that the pressure in the pressure chamber rises to at or about the starting pressure P0.

An adapter for use in a filter device is provided, the adapter having a downwardly slanted inner wall including two or more hollow passageways, and a central fluid flow port, wherein the adapter can be welded to a filter device housing head.

A milking device for milking a dairy animal is provided with milking mechanism, a control system, a milk pipeline for transporting the milk from the milking mechanism to a milk tank, a milk filter and a cleaning device. The cleaning device includes at least one cleaning fluid holder, a heating device for heating cleaning fluid in the cleaning fluid holder, an additive storage holder for additive, an additive adding device for controlled addition of the additive to cleaning fluid, and a valve system for regulating flows of cleaning fluid and additive through the milking device. The cleaning device is configured for carrying out a cleaning cycle of the milking device with a prerinse with cold or tepid water, a hot rinse with heated water and an acidic or basic additive, a postrinse, and at least between the hot rinse and the postrinse, a counterflow cleaning step by passing cleaning fluid in counterflow through the milk filter. Thus, a milking device is provided that can be cleaned automatically as a whole including the milk filter. In particular, because the counterflow cleansing takes place after the hot rinse step, there is better removal of dirt and milk residues that are softened thereby, in particular from the milk filter.

Apparatuses and methods to rejuvenate spent filtration media are described. The apparatuses include a filtration unit to filter a liquid having solids that need to be removed and a rejuvenation unit to heat the spent filtration media that has reduced filtering capacity. The methods include using the apparatus to rejuvenate spent filtration media by removing solids deposited on the filtration media to allow its repeated reuse rather than being discarded and replaced with new filtration media.

Provided is a washing device that washes a filter of an extraction device with a fluid, the extraction device including an extraction tank for storing an extraction material, a lid body supported openably and closably at a lower portion of the extraction tank, and the filter which is provided on the lid body, and on which the extraction material is placed, the washing device including, a tube body which is disposed at a fixed position with respect to the extraction tank, and through which the fluid passes, and an ejection port provided on the tube body and injecting the fluid toward the filter when the lid body is in an open state.

A method of cleaning a regenerative filter having a filter housing having inlet and outlet zones, a fluid path provided between the inlet and outlet zones, and a plurality of filter elements each having an outer surface filter media applied thereto and functioning to filter particulate or contaminants from the fluid path, the method comprising draining all fluids from the filter housing, refilling the filter housing with fluid to an optimum level, and initiating a cleaning sequence of the filter housing with the fluid at the optimum level. The cleaning sequence can comprise agitating the tube sheet, initiating a pump to effectively air scour for a first predetermined amount of time, dwelling for a second predetermined amount of time, and repeating the agitating, initiating, and dwelling until a third predetermined amount of time is complete.