Abstract: The present invention relates to a device for extracting cakes resulting from pressurized filtration from a sealed tank (1) in which rotary filters (2) are provided, the tank being provided with a hopper (1b) for recovering solid particles and having an extension, in the lower portion thereof, in the form of a hatch (10) defined between at least two temporary blocking members (11, 12), characterized in that each temporary blocking member includes a rotary shaft (100) transversally arranged in the hatch and bearing at least one set (101, 102, 103) of two diametrically opposite radial fins having a global surface substantially corresponding to the cross-section of the hatch (10) and optionally at least one set of two radial forks (104, 105), as well as peripheral sealing means(102) mounted on the inner wall of the hatch opposite the end edge of said fins. The invention also relates to an associated extraction method.

Abstract: The present invention relates to a method of treating lime mud slurry being generated in a causticizing process in a pulp mill in a disc filter, in which method the lime mud is fed in the filter, thickened on the filter discs and removed from the filter discs. The lime mud is treated in at least two stages in one and the same disc filter in such a way that the lime mud slurry entering the filter is fed onto only a part of the filter discs, on which lime mud is thickened and removed from the discs, and the removed lime mud is re-slurried in liquid, and the lime mud slurry thus obtained is fed onto a second part of the filter discs, on which lime mud is thickened and removed from the filter and led into a subsequent process stage. The invention also relates to an apparatus.

Abstract: A magnetic separation filtering and cleaning apparatus for adding flocculant and magnetic powder to raw water containing pollutant particles to form magnetic floc in treated fluid and separating and removing the magnetic floc from the treated fluid, comprising: a magnetic field generation device being provided in a rotating body for suctioning the magnetic floc on a surface of the rotating body from the treated fluid containing the magnetic floc, a magnetic field rotating device for rotating the magnetic field generation device, a sludge recovery device for separating sludge including the magnetic floc mechanically from the surface of the rotating body of the magnetic field generation device; and a filtering device having a rotating net for filtering out the magnetic floc from the treated fluid including the magnetic floc and flowing down the treated fluid filtered through the rotating net.

Abstract: An automatically cleaned filter comprises a motor; a base above the motor; the base being formed with at least one filter seat, a water inlet, a water draining hole and an annular groove; at least one filter core installed on a respective one of the filter seat; the filtering material being formed on an outer side of the filter core; a cleaning unit installed on a center portion of the base; a bottom of the cleaning unit being connected to the spindle; a gear being installed at an upper side of the base and being engaged to the spindle; an upper cover combined to the base by using at least one supporting posts; a lower side of each filter core being installed with a gear; and the gear at the lower side of the filter core being engaged to the gear of the cleaning unit.

Abstract: An automatic strainer assembly for straining a slurry comprises an inlet for receiving the slurry, a horizontally disposed strainer body in fluid communication with the inlet, and a rotatable strainer member received within the body having an inner surface and an outer surface. The strainer member defines a plurality of passageways for strained fluid to pass therethrough. A scraper is positioned substantially adjacent to and contacting the outer surface of the strainer member for removing material from the outer surface of the strainer member. A collection vessel is positioned substantially below the body for receiving material scraped from the outer surface of the strainer member. This collection vessel can include a transport member for returning this scraped material to an initial slurry supply for reprocessing thereof. An outlet is provided in fluid communication with the horizontal strainer body to expel the strained slurry.

Abstract: A system (10) for extracting liquid from a mass comprising a portable platform (12) having an upper surface (14), a system mass input (16), a polymer feeding and blending system (18) on the upper surface (14), a liquid extraction assembly (40) on the upper surface (14), and piping (22) having a first section (24) between the system mass input (16) and the polymer feeding and blending system (18), and a second section (26) between the polymer feeding and blending system (18) and the liquid extraction assembly (40). The system is configured to have mass inputted into the system mass input (16), transport the mass to the polymer feeding and blending system (18) through the first section (24) of the piping, inject polymer into the mass in the polymer feeding and blending system (18), and transport the mass from the polymer feeding and blending system (18) to the liquid extraction assembly (40). Pressure from the mass forced into the liquid extraction assembly (18) forces liquid in the mass to exit the mass.

Abstract: A method for increasing the removal of a higher fraction of liquid from the press cake in any belt press is described. Specifically, the invention incorporates a series of rollers that create multiple pinch points to compress the solid fraction while removing liquid. After each pinch point, the solid material is allowed to separate from the belt, fall by gravity, and repack so that more liquid can be released at each successive pinch point than is possible if the material is fed to multiple rollers and pinch points in series without decompressing as is done is prior art.

Abstract: A magnet drum mechanism of a magnet separator includes a cylindrical drum, a magnet provided inside of the drum and forming a magnetic field region configured to adsorb magnetic particles in a circumferentially partial range of an outer peripheral surface of the drum, and a scraper provided in a nonmagnetic field region of the drum, the scraper being configured to guide the magnetic particles adsorbed onto the outer peripheral surface of the drum to an outside of the separator main body in the nonmagnetic field region. The scraper includes a front end portion which faces the outer peripheral surface of the drum in a contactless manner along an axial direction of the drum, and a small gap is formed between the front end portion and the outer peripheral surface of the drum.

Abstract: A contaminated fluid recovery apparatus includes a dirty tank, a conveyor, and a drum-shaped filter unit. Inlet ports of the drum-shaped filter unit open along an axis of a magnet drum. The conveyor scrapes out an object for removal settled on a bottom portion of the dirty tank toward an exit section. The conveyor includes a lower portion which moves along the bottom portion and an upper portion which passes over the lower portion. The magnet drum is located horizontally between the lower portion and the upper portion of the conveyor so that its axis is perpendicular to a direction of travel of the conveyor. The magnet drum is driven by a chain of the conveyor.

Abstract: The invention relates to an apparatus for continuous separation of dry matter from a fluid, comprising an enclosed environment capable of being under vacuum or under positive pressure, in which enclosed environment a number of rollers (1, 3, 4, 4?, 6, 6?, 20, 21, 22, 23) form a chamber which is divided into two or more compartments (12, 13, 24, 27, 25, 26) by filtration means (7, 8, 16, 29, 36, 37, 38, 40), wherein one or more filtrated chambers (9, 10) are placed on the pure side of the filter means. In order to allow for cleaning and/or maintenance of the filtrate chambers, additional filtrate chambers are provided, which are separated from the first filtrate chambers by a wall. One of the filtrate chambers at any time is placed under the filter, while the other filtrate chambers are situated outside the enclosure for maintenance/cleaning.

Abstract: A contaminated fluid recovery apparatus includes a sludge removal mechanism having a dirty tank, a conveyor, and a magnetic drum which is arranged in the fluid circulating section. The contaminated fluid recovery apparatus is provided with an overflow tank. The overflow tank has a function to keep a fluid surface of the dirty tank in a position higher than the fluid circulating section and the magnetic drum. The magnetic drum is located horizontally between a lower portion and an upper portion of the conveyor. The conveyor scrapes out chips deposited on a bottom portion of the dirty tank toward an exit section. A scraping member, which is in contact with the magnetic drum, drops sludge attracted to the magnetic drum toward the lower portion of the conveyor.

Abstract: An assembly for extracting liquid from or adding liquid to a mass comprising a housing having an inlet, an outlet and a path therebetween. The housing is configured to have the mass forced into the inlet to move the mass from the inlet to the outlet. The housing includes at least one rotating screen adjacent the path, with each at least one rotating screen defining one wall of the path. The at least one rotating screen includes a plurality of openings located at the path. Pressure from mass forced into the input forces the mass along the path between the inlet and the outlet. The housing includes at least one rotatable scraper in the path and adjacent the at least one rotating screen, the at least one rotatable scraper cleaning the at least one rotating screen as the rotating screen is rotated past the at least one rotatable scraper.

Abstract: The invention relates to a device which is used to continuously filter material mixtures, in particular for separating impurities from plastic melts. The device includes a hollow cylindrically-shaped filter element (2) which is arranged inside a housing (1), an annular chamber (22) which is defined from the outside of the filter element (2) and an inner wall of the housing, and at least one stripper (23) which can be pressed onto the filter body by an adjusting device. The stripper is used to remove the impurities detained on the filter element (2) due to a relative movement of the filter element (2) and the stripper (23). The adjusting device contains a pressure sensor (42, 53) which is used to detect the pressure of the material mixture upstream from the filter body and an actuator (43) which is connected to the pressure sensor, the actuator being used to adjust the pressure of the stripper (23) according to the pressure detected by the pressure sensor.

Abstract: The invention relates to an apparatus for the continuous filtering of impurities from a flowable compound, especially a plastic melt, comprising a filter insert (3) in the form of a hollow rotary body which is held to rotate about its rotational axis (A) relative to a housing (1, 2) and is flowed through by the flowable compound and which is arranged in a flow conduit of the housing (1, 2) between a feed conduit (7) for the compound to be filtered and a discharge conduit (8) for the filtered compound, and a discharge apparatus for impurities held back by the filter, which apparatus comprises a feed screw (9) cooperating with the filter insert (3). In order to provide advantageous constructional conditions it is proposed that the filter insert (3) comprises a disk-like filter (5) which is arranged on the face side of the rotary body and is coaxial to the rotational axis (A).

Abstract: A method and device for separating particles from a liquid having particles therein, using a filter sized to permit the liquid to flow through pores, while retaining a substantial portion of the particles on the filter, with an absorbent layer contacting the back of the filter to facilitate liquid movement away from the particles.

Abstract: A self-cleaning filtration machine with rotary drum filter for filtering contaminated liquids, comprising at least one filtration device which is associated with the rotary drum, the filtration device being interposed between a contaminated liquid collection tank and a filtered liquid collection tank, the self-cleaning filtration machine comprising air suction means in order to generate a partial vacuum between the contaminated liquid collection tank and the filtered liquid collection tank.

Abstract: A hydrocarbon removal apparatus includes a plurality of fibers and a backing substrate. Each of the plurality of fibers includes a proximal end and a distal end. Each proximal end is secured to the backing substrate.

Abstract: Apparatus for creating a seal between an axle journal and a bearing housing is disclosed, particularly for use in apparatus for dewatering or washing material suspensions. The apparatus includes a stator ring, a pair of diagonally disposed guide pins supporting the stator ring with respect to the bearing housing so that the stator ring can be angled in a plane with respect to the pair of guide pins, a sealing ring for creating a seal between the stator ring and the axle journal, a bellows for creating a seal between the bearing housing and the stator ring, and at least one resilient member for urging the stator ring in abutment against the sealing ring.

Abstract: A method and an apparatus for separating dry matter from liquid includes an enclosed separation environment capable of being pressure regulated. Within the enclosed separation environment, a suspension is brought into contact with at least one filter so as to accumulate dry matter on the at least one filter. The filter with the dry matter passes through at least one set of rollers such that liquid is removed from the dry matter on the at least one filter to form a substantially dry filter cake. Thereafter, the substantially dry filter cake is removed from the at least one filter. The above steps are performed in the enclosed separation environment either under vacuum or overpressure. The invention may be used in various fields such as the food industry.

Abstract: Coolant fluid cleaning method, system, and apparatus use a rotating magnet to remove particulate matter from a fluid used to cool or lubricate a machining or other operation. Such system includes a rotating magnet in fluid communication with apparatus circulating fluid past the rotating magnet. A scraper blade removes particulate matter which is picked up by the rotating magnet. The system or apparatus can include a dirty fluid reservoir, one or more conveyor which removes chips and particulate matter from the dirty fluid reservoir, and a clean fluid reservoir. The rotating magnet collects particulate matter in the dirty fluid reservoir and discharges the collected particulate matter to a discharge conveyance. When the rotating magnet is used in combination with a disc filter, the magnet relieves some cleaning load from the disc filter.

Abstract: A device is provided for fluid treatment, in particular for waste water treatment. The fluid is led along a surface (3) coated with biological material. A wiper element (5) is provided, which brushes the surface (3) not as a whole, but in paths. The path course is selected such that the coated surface (3) is successively brushed in sections.

Abstract: Provided is a rotary bar screen device. The device includes a driving motor, an up/down pair of driving and driven sprockets, left and right transfer chains, a plurality of screen buckets, a removal unit, and a slide plate. The driving motor is provided over a support frame, and transmits a driving force. The driving and driven sprockets are driven by the driving force. The left and right transfer chains connect the driving and driven sprockets with each other while circulatively moving. The plurality of screen buckets are provided between the left and right transfer chains. The removal unit is provided between the left and right driving sprockets. The slide plate guides the foreign materials dropping from the screen buckets.

Abstract: The horizontal ore filter has a plurality of filter elements covering the circular filter surface thereof and a sub-frame supporting the filter surface. In one aspect, each filter element has a longitudinal concave curvature therein. In another aspect, each sector frame has side flanges thereon. The sub-frame has a plurality of T-bars extending radially along the circular filter surface and each one of these T-bars supports the side edges of two adjacent filter elements. Upon installation of the filter elements to the sub-frame, the sector frames are held tight against the T-bars to ensure a good seal between adjacent filter elements and between each filter element and the sub-frame of the machine.

Abstract: The present invention provides a system for sludge treatment which transfers sludge into a dewatering device while maintaining the sludge density at a predetermined level constant suitable for dewatering the sludge even when the density of the precipitated sludge varies, thus improving the sludge treating efficiency and sludge dewatering efficiency, and reducing the amount of a coagulant to be used. In the system for sludge treatment, a sludge concentration device is installed in a mixing flocculation tank. Thus, the sludge is mixed with the coagulant and flocculated in the mixing flocculation tank to produce flocs and a supernatant, while the supernatant is directly discharged from the mixing flocculation tank. Furthermore, the amount of the supernatant is controlled to maintain the desired density of the flocs to be transferred to the dewatering device. Thus, the dewatering device can be stably operated.

Abstract: There is a method of capturing, removing or collecting the particulate matter from a fluid containing a toxic liquid reaction and particulate matter produced from the reaction. The method includes partly or completely disposing a screen into the toxic fluid. Mixing the toxic fluid allowing the particulate matter to contact the screen. Moving the screen to capture the particulate matter on the screen. Removing the particulate matter from the screen by washing or scraping. There is also a cleaning apparatus to capture, remove or collect particulate matter from a toxic fluid. A cleaning apparatus contains at least a screen and a structure securing the screen. The cleaning apparatus can optionally include a scraping or washing means, a drive means, a flow inducer and a housing structure.

Abstract: A filter device is provided with a filter tank, a filter drum disposed in the filter tank, and a drive mechanism which rotates the filter drum. The filter element is composed of a porous plate that is formed with a large number of circulation holes. The porous plate is formed into a cylindrical shape. An inlet port opens in an outer peripheral surface of the porous plate. An outlet port opens in an inner peripheral surface of the porous plate. The circulation hole is formed by etching. A smallest opening of the circulation hole is formed between the inlet port and an intermediate part with respect to a plate thickness direction. An opening width of the circulation hole increases from the smallest opening toward the outlet port to form a tapered shape.

Abstract: Method and arrangement for continuous filtering of particles out of a contaminated liquid by means of a number of separate filtering units (14) in order continuously to feed purified liquid to a consumer. Each filtering unit (14) comprises a rotatable, perforated drum (16) with a particle-catching filter means (18) on the outer surface of the drum. A first predetermined degree of coating with particles is created on the filter means of the drums, and purified liquid inside all the drums of the filtering units (14) except at least one, which is kept inactive in a standby state by shutting off the associated pump (26), is then fed to a consumer. The feed of purified liquid from a drum to the consumer is interrupted when a second predetermined, higher degree of coating with particles has been reached on the filter means on an individual drum, at least one filtering unit kept in standby state being activated as replacement for the filtering unit(s) from which the feed of purified liquid has been interrupted.

Abstract: A scraper adjustment mechanism and method for a filter that permits an operator to adjust the distance between the scraper and a filter surface without the need to have access to the filter/scraper interface, or fasteners within the filter.

Abstract: A self-cleaning screen that automatically cleans both the inside and outside surfaces of the cylindrical screen using only the rotation of the cylindrical screen itself. This self-cleaning ability is accomplished by using a fixed brush on the exterior surface of the screen, and a freely rotating brush on the interior surface of the screen, where the freely rotating brush is driven by the movement of the screen itself.

Abstract: A method and apparatus for separating ferrous metal particles from non-ferrous metal particles suspended in a liquid, such as a coolant from a machining operation, in which mixed particle containing liquid is discharged across a horizontal, non-magnetic separating surface; the magnetic ferrous metal particles are captured by a magnetic force exerted by an array of parallel magnets disposed underneath the separating surface, the non-magnetic non-ferrous metal particles are washed by the liquid into a collecting flume from where they can be passed to a filtering station for removal from the liquid, and the captured ferrous metal particles are scraped from the separating surface and conveyed to a ferrous metal discharge by a scraper conveyor which moves transversely to the discharge direction of the liquid.

Abstract: A device for the continuous filtration of material blends, in particular for separating impurities from plastic melts. A housing has a hollow cylindrical filter disposed inside. An inside chamber is disposed inside the filter. An annular chamber is defined by the outer surface of the filter and an inside wall of the housing. A cleaning device removes the impurities retained on the filter by a motor driving about an axis coupled to pivot the filter inside the housing. The cleaning device has at least one wiper for removing in the radial direction impurities retained on the filter. A conveying device transports off the impurities removed from the filter by the wiper. The motor-driven filter and the conveying device are driven separately of each other.

Abstract: A filter assembly for an aquarium has a self-cleaning filter. A fine mesh filter screen is disposed between an inlet and an outlet for filtering solid matter from the water that is pumped from the aquarium, through the filter, and back to the aquarium. When the filter screen is sufficiently loaded, or according to a set schedule, the solid matter is suctioned off the filter screen with a vacuum assembly. For that purpose, the water flow is first diverted, the filter screen is rotated, and the vacuum assembly is turned on. After the screen has been vacuumed, the vacuum assembly is once more turned off and the water flow is redirected to pass through the filter screen.

Abstract: A high debris content strainer that utilizes a cylindrically-shaped screen having four removal assemblies positioned evenly around the screen periphery. Each removal assembly includes a backwash spray bar on the downstream side of the screen and a scraper/brush and discharge tube on the upstream side of the screen where the debris lodges during filtering. The screen is rotatably-mounted inside a strainer housing. A shroud surrounds ¾ of the screen periphery and includes an opening directly adjacent an input fluid flow line, as well as scoops on opposing sides of the shroud. The shroud evenly distributes the contaminated fluid flow around the screen. When cleaning the screen is desired, the screen is rotated while the backwash spray bars are activated and, in combination with the scraper/brushes, the debris is dislodged from the upstream surface of the screen and directed into the discharge tubes which divert the contaminants to a discharge pipe.

Abstract: A novel separator housed within a shell for the separations of solid and liquid components from a slurry. The separator has two stages, a first static screen and rotating brush assembly section and a second stage, with a screen and a roller press and brush assembly. The slurry is pumped into the separator through a weir box. The slurry flows into the first stage and most of the liquid component flows into a sump located below the two stages. The solid component is then directed into the second stage where the rollers squeeze remaining liquids from the solid component. The brushes then direct the remaining solid component of the slurry into a solids discharge area.

Abstract: A filtering system used on a meat injection machine that injects pickling into meat products. The filter consists of a tank and a first and second rotary filter. The first rotary filter uses a wedge wire wound cylinder and augers having flutes that rotate to catch and push away solid particles toward the second filter. The second filter then uses more wedge wire in a whirlpool effect to ensure all solid materials and foam are in the outside of the filter. Injector fluid is then taken from the center of the inside volume of the second filter to be used in injection needles.

Abstract: A sludge concentrating apparatus comprising a sludge tank for storing sludge and a filter cloth having a shape of endless belt which turns between upper and lower rollers, further comprising filtering means of which at least the lowermost of rollers is immersed in the sludge, washing means of the filter cloth, and a filtrate chamber having a filtrate introducing port in contact with the filter cloth and a weir, wherein a sludge distributing tank serving as sludge introducing means into the sludge tank is provided near the upper end of the filtrate introducing port, and a concetrated sludge discharge tank serving as concertrated sludge introducing means with the filter cloth in between; said sludge concentrating apparatus further comprising coagulant adding means for adding an acid, and a flow adjustment device serving as a sludge uniform feeding means which feeds sludge fed into the sludge tank uniformly in the width direction of the filter cloth.

Abstract: A positive pressure disc-type filtration apparatus including a collection trough internal to the cylindrical pressure vessel housing the filter discs. The collection trough is entirely disposed within the cylinder of the pressure vessel and configured and located to receive and direct filter cake removed from the discs and then reslurried and sluiced toward the center of the trough using jets of liquid, to be discharged longitudinally centrally through a single outlet extending downwardly from the trough and through the wall of the pressure vessel. A method of filtration is also disclosed.

Abstract: A filtering system used on a meat injection machine that injects pickling into meat products. The filter consists of a tank and a first and second rotary filter. The first rotary filter uses a wedge wire wound cylinder and augers having flutes that rotate to catch and push away solid particles toward the second filter. The second filter then uses more wedge wire in a whirlpool effect to ensure all solid materials and foam are in the outside of the filter. Injector fluid is then taken from the center of the inside volume of the second filter to be used in injection needles.

Abstract: A process includes coating a cylinder having an inner wall and a cylinder axis with a gel coating on the inner wall. Then a specimen mixture including solvent is made to flow through the cylinder while the cylinder is being continuously rotated. The specimen mixture is initially directed to flow along the cylinder axis and such that specimen particles from the specimen mixture are accelerated off the cylinder axis toward the inner wall, so as to form a film of specimen particles embedded into the gel coating.

Abstract: The method for separating ferrate salts from a solution comprising providing contact between the solution of essentially of aqueous hydroxide and the ferrate salts and a surface having a magnetic attraction, magnetically securing the ferrate salts to the surface; and eliminating contact between the solution and the surface. Contact is provided by immersing the surface in the solution, passing the liquid ferrate mixture over the surface, or combinations thereof. The magnetic attraction may be induced by permanent magnets, electromagnets, and combinations thereof. The apparatus for ferrate production comprises an electrochemical cell having an iron-containing anode, cathode, and an aqueous hydroxide solution in fluid communication with both the anode and the cathode, and a magnetic separator in fluid communication with the aqueous hydroxide solution for separating ferrate salts from the aqueous hydroxide solution.

Abstract: The magnetic separator has a tank with a pair of dual conveyor chains, spaced apart, at opposite sides of the tank. A plurality of frames with spaced apart magnetic rods are suspended from the conveyor chains in a manner allowing the frames to swivel and always hang vertically as the chains traverse their endless path. The liquid in the tank flows through the frames and ferrous particles are attracted to the magnetic rods. The rods are cleaned and the ferrous particles removed at a wiping station. Each frame has a scraping edge which contacts the bottom of the tank and drags out the non-magnetic particulate which has separated from the liquid.

Abstract: Systems and methods for treating waste water containing biological wastes such as animal waste generated in livestock-raising operations, wherein the waste water is subjected to a series of operations to separate solids from the liquid phase of the waste water and to biologically treat the waste water to break down organic components. The separated solids are stored for further treatment or conversion into useful materials. The treated liquid phase can be put to various uses. In one embodiment, the treated liquid is recycled as flush water for flushing animal waste from an animal barn, whereby little or no liquid phase escapes the system into the surrounding environment.

Abstract: Screening apparatus (101,901) for use at an overflow weir (301, 902) in a sewerage system. The apparatus comprises a continuous moving screen band (201,902) and a band cleaning mechanism (608). A first portion (801) of the screen band is configured to move along the weir towards one of its ends, and a second portion (803) of the screen band is configured to move along the weir towards its opposite end. A steeper portion (805) of the screen band extends to an elevated position (806) above the first and second portions, and the band cleaning mechanism is arranged to remove solid matter from the screen at said elevated position.

Abstract: Self-cleaning drum filter comprising a pressure vessel (11) containing a cylindrical filtering drum (15) to whose outside curved surface a filtering mat (57) is juxtaposed, provided with means for removal of the cake collected on the outside of said filtering mat consisting of a scanner plate (18), substantially equal in length to the filtering drum cylindrical surface, juxtaposed to the inside wall of said pressure vessel, said plate being provided along its length with a through-slit (22) centrally placed that provides a passage between the inner (69) and outer (68) faces of said scanner plate, said outer face (68) being provided, along the length of said slit (22), with a trough (21) which forms, together with the inner wall of said pressure vessel, a channel for collecting the flushing liquid during the cake-removal cleaning operation.

Abstract: The present invention provides a drum type paper stock refine screen capable of efficiently filtering a refined paper stock to the outside of a laterally suspended rotary drum and efficiently discharging foreign matter to the outside of the drum while rotating the drum.

Abstract: A rotating drum pressure differential filter is provided whereby a layer of filter medium is continuously refreshed by a spray applicator device after the layer is utilized to filter components sample medium and a portion of the layer is subsequently scraped to remove sample medium waste from the layer. Methods of filtration using the device are also provided as are systems employing two or more such filters. A spray applicator device useful for refreshing a filter medium on the outer surface of a rotating drum pressure differential filter is also provided as is a retro fit kit useful in modifying existing rotating drum pressure differential filters to enable the continuous formation of a refreshed filter medium layer. The continuously refreshed filter and filter systems provide a minimized down time of the filter and system operations. Multiple-stage filtration processes are also provided and are particularly in the recovery of enzymes from fermentation broths.

Abstract: A solid-liquid separating apparatus comprising a cylindrical strainer formed by circular ring members with gaps in between, a casing having the strainer therein, and scrapers disposed in the respective gaps between the circular ring members for removing solid matter adhering to the end (flat) surfaces of the circular ring members. Each of the scrapers comprises a flat auxiliary circular ring member and a flat protruding element. The external diameter of the auxiliary circular ring member is smaller than the external diameter of the circular ring members and is larger than the internal diameter of the circular ring members, and the protruding element extends from the outer circumferential surface of the auxiliary circular ring member. The auxiliary circular ring members are disposed coaxially with the circular ring members, and the tip ends of protruding elements reach the outer circumferences of the circular ring members.

Abstract: The pipe system is for receiving and transporting lime sludge from a filter medium in a continuously operating pressurized filter 1 in a causticizing process, where lime sludge is scraped off from the filter medium 2 and falls down into receiving chutes 4a for the lime sludge. Conventional storage tanks for scraped-off lime sludge and their mechanical agitators are thus replaced by a pipe system 11 where the pipe system does not have a mechanical agitator at all but has a flow cross section which maintains a flow rate in the lime sludge so that sedimentation of the lime sludge does not take place from the receiving chute 4a to the feed-out opening 30 of the pipe system.

Abstract: The invention relates to a process for washing and dewatering starch suspensions in a single step using a vacuum filter. It also relates to a rotary vacuum drum filter having means for feeding a suspension, sprayers for applying washing liquids and a scraper.

Abstract: The invention is relative to a device for dehydrating sludge such as occurs in sewage treatment plants in the form of dilute sludge. The receptacle for the sludge contains a sieve surface comprising openings for the passage of liquid. The sieve surface, for its part, is substantially circular can be rotated about an axis (21) running vertically to the sieve surface. The axis (21) of the sieve surface (2) is inclined relative to a horizontal line and is caused to rotate by a drive device (3). The disk-shaped sieve surface (2) is arranged in a container (11) comprising a bottom (13) and a side wall (12) through which side wall a supply line (4) for the sludge and an outlet (41) for the separated water run.