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WO/2000/037692A1 |
The invention concerns a method for filtering a metal liquid by passing said metal liquid on a bed of refractory particulate material characterised in that the particulate material, generally based on electrically melted corundum has an ...
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WO1999048584A9 |
A method and apparatus for removing organic contaminants from an aqueous phase in which the contaminant is solubilized. In the method the aqueous phase is passed through a fluid-pervious filtration media (12) which has been infused with ...
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WO/2000/032523A1 |
The present invention provides a water plant treatment system (5) in which the nitrogen and phosphorus components and other contamination substances are removed from the water which has been treated biologically by the conventional syste...
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WO/2000/025887A1 |
The invention provides a water treatment apparatus to remove impurities, the apparatus comprising a housing (10, 70) having an inlet (15; 77, 80) for the water to be treated, an outlet (21, 85) for the treated water and treatment means (...
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WO/2000/021635A1 |
This invention relates to a novel intermittent slow sand filter and a method of using the intermittent filter. More particularly, this invention pertains to a novel slow sand filter which remains effective, even when intermittently opera...
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WO/2000/016874A1 |
The invention relates to a filter (1) which has a backwashing system (2) comprising a plurality of members in the form of slotted stainless steel pipes or tubes, or 'laterals', (3) extending laterally of the filter below the filter mediu...
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WO/1999/065832A1 |
A filter cartridge assembly comprising: at least one filter cartridge (60) including a housing (98) having two ends, the housing containing a filter media (102, 102'); a first end cap (90) disposed on one end of said housing, said first ...
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WO/1999/058456A1 |
A front packing medium accumulation layer (90) and a downstream packing medium accumulation layer (44) which are separated by a lower outflow prevention plate (40) are arranged within a coagulation tank (80). The superficial water passag...
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WO/1999/055628A1 |
A device for biological treatment of wastewater, especially rinsing water arising from small-sized domestic objects that are not connected to the drainage network. The inventive device is provided with at least one mechanical collector (...
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WO/1999/051317A1 |
A filter cartridge (10) for purifying fluids such as water and chemicals is provided with sealing rings (124, 126) integrally formed with and extending circumferentially from a tube (122) connected to the housing (100) of the filter cart...
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WO/1999/049951A1 |
The invention relates to an apparatus for removing filtered material from a pressurised filter space, in which filter space there are installed members for feeding the material to be processed to filtering carried out in a pressurised sp...
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WO/1999/047232A1 |
A method for retrofitting a gravity filter with a porous plate filter media support that increase filter production by increasing the depth of the media, allows installation of an air backwash system in filters having a monolithic underd...
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WO/1999/046024A1 |
The invention provides a granular-bed, modular filter unit, including at least one chamber defined and delimited by a housing (2) surrounding said chamber and two end walls (4, 4'), and divided by an imaginary, axial, substantially horiz...
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WO/1999/044712A1 |
An antimicrobial filter cartridge (10) having a perforated core member (12) wrapped with a microporous membrane (17), which is overwrapped with a spiral wrapping of an antimicrobial agent impregnated yarn (18). The spiral wrapping is cov...
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WO/1999/038596A1 |
The invention relates to a filter nozzle with a filter head (1) and a discharge pipe (2). The filter nozzle has an upper shut-off flange (4) and a lower supporting flange (7) as well as blades (8) which are arranged between the shut-off ...
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WO/1999/037819A2 |
The invention relates to compositions and methods useful in the detection of nucleic acids using a variety of amplification techniques, including both signal amplification and target amplification. Detection proceeds through the use of a...
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WO/1999/024140A1 |
A differential pressure monitor (50) for measuring the pressure at a plurality of heights in a filter bed (38) is provided. A preferred embodiment of the monitor (50) includes an elongated body (70), a plurality of pressure sensors (56) ...
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WO/1999/024142A1 |
The present invention relates to a liquid filtering apparatus that includes a vessel which contains a bed of particulate or granular filter medium and a filter-medium washer (7) located above the upper side of the bed. The apparatus incl...
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WO/1999/016528A1 |
The invention concerns a filtering device for liquids, in particular food liquids, consisting of at least a cartridge (1) comprising a volume shaped like a cylindrical ring defined by an outer cylindrical grid (25, 34, 36), whereat the l...
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WO/1999/015254A1 |
An improved underdrain block (60) for an underdrain system supporting a filter media bed in a liquid filtration system is provided. The underdrain block (60) comprises an upper wall (12), side walls (14), a lower wall (16), at least one ...
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WO/1999/014445A1 |
A device is disclosed for forming a liquid-permeable flooring, manhole cover or the like with two mutually spaced apart perforated slabs (1, 2) joined to one another by a circumferential wall (3) and which form an intermediate receiving ...
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WO/1999/012628A1 |
A filter cartridge (10) containing resin beads (140) for purifying fluids such as water and chemicals has a cylindrical housing (5) with an interior compartment containing a fixed septum (150) and a moveable piston-like septum (130). The...
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WO/1999/010071A1 |
The invention concerns a method for treating water to abate their content in suspended matter and, as the case may be in parasites, characterised in that it consists in causing said water to pass through at least one sedimentation tank (...
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WO/1999/008768A1 |
The invention is directed to purification of liquids, such as drinking water using filters, wherein filtration is effected while the liquid flows upwardly. The invention includes both the method and a device enabling the method to be car...
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WO/1999/001220A1 |
The invention relates to a water container with a filter cartridge, for use especially in beverage-dispensing machines, which reduces or eliminates the risk of germ formation and of densification of the filter bed. To this end the invent...
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WO/1999/000172A1 |
A leukapheretic filter medium which comprises a base and ultrathin fibers having a diameter of 0.01 to less than 1.0 $g(m)m in an amount of 0.1 to less than 50 wt.%, wherein the ultrathin fibers have a curvature of 1.2 or higher and/or t...
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WO/1998/052878A1 |
This invention relates to a water purification apparatus having many uses. It comprises a main member in the form of tube. Said tube is vertically provided within a tank. The top open of the tube is connected to a suitable elbow. An air ...
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WO/1998/046534A1 |
A filter cartridge (20) for a gravity-fed water treatment device having a porous particulate filter (24) disposed therein. The porous particulate filter (24) has an open upper end, a closed lower end, and sidewalls therebetween. Water is...
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WO/1998/040147A1 |
An improved water filter cartridge container (10) generally comprising a container body (12) and a container cap (14). Filtration material is placed within the container body and the container cap is then attached to the container body. ...
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WO/1998/040146A1 |
The invention concerns an ascending filtration device for waste water comprising an immersed bed (1) supported by a deck (2), the bed (1) consisting of a plurality of tiered up layers of granular materials seeded with a biomass, means fo...
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WO/1998/040316A1 |
The invention concerns a device for distributing and/or collecting water passing through an immersed filtering bed (1) consisting of at least one layer (2a, 2b, 2c) of a granular filtering material, said device being designed to be insta...
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WO/1998/039780A1 |
A suction strainer for a Boiling Water Reactor (BWR) Emergency Core Cooling System (ECCS) has an elongated frame with substantially arcuate screen material ends, corrugated metal screen material of alternating ridges and furrows and flat...
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WO/1998/039080A1 |
An in-line gravity filtration device for biological fluids such as blood or blood products is disclosed. The device includes a series of channels (20, 21, 22) formed downstream of filtration elements (3, 4, 5, 6). The channels (20, 21, 2...
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WO/1998/036816A1 |
The invention concerns a method for making a filter bottom for water treatment comprising a structure (10) consisting of beams or posts supporting a slab (9) provided with a plurality of openings for receiving screen water filters (11). ...
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WO/1998/034881A1 |
The invention relates to a device for the sterilization of drinking water, which can be used wherever the purification and sterilization of water are required. Said invention specifically comprises the following: a receptacle for the ste...
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WO/1998/035132A1 |
A prepacked well screen has concentric inner (10) and outer (11) fiber reinforced composite tubes with a granular filter medium (13) in the annulus between the inner (10) and outer (11) tubes. The walls of the tubes are slotted (12) for ...
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WO/1998/030311A1 |
A burden removal system for removing solid burden from a stream of water. A screen (35) has an upper (36) and a lower surface (37) with pores (38) extending between them. The upper surface (36) is substantially horizontal. A drive bar (4...
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WO/1998/030307A1 |
A continuous flow centrifuge adapted with an insert of glass beads, sand or the like is used to concentrate cysts of microorganisms such as giardia or cryptosporidium from large volumes of water. The apparatus and methods are useful for ...
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WO/1998/028058A1 |
The invention relates to a method and device for the continuous filtration of liquids containing solid matter, in particular for cleaning wastewater, by means of a filter bed consisting of a particulate filtering medium, which is continu...
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WO/1998/025681A1 |
A high rate, upflow filtration system is described in which a compressible, fibrous lump filtration media is compressed to adjust the porosity and collector size of the media in the bed and to provide a porosity gradient within the bed p...
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WO/1998/023357A1 |
A filter system (10) comprising a filter medium (11) for filtering contaminants from a process fluid, having a filtration side on which contaminants collect and a filtrate side from which filtrate flows; a counter-flow generator (20) loc...
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WO/1998/022197A1 |
A water insoluble polymeric composition which is a reaction product of a cyclodextrin monomer and a polyfunctional crosslinker from the group of polyisocyanates, dihalohydrocarbons, and dihaloacetylhydrocarbons is disclosed together with...
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WO/1998/020956A1 |
A water filtration technique is designed to maximize the efficient performance of a variety of granular filtration media. The technique maintains the granular filtration media (62) in a compacted state between a perforated outer media co...
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WO/1998/019766A1 |
The present invention is a dual-stage, gravity continuously-backwashed filtering system for filtering contaminants from water. This filtering system has a first sand-filter unit (10a) that is loaded with water influent. The filtering sys...
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WO/1998/017370A1 |
The invention relates to a method and apparatus for cleaning the filter surface (2, 3) of a filter medium in a suction drier. According to the invention, in order to mark the surface to be cleaned, in contact with the surface to be clean...
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WO/1998/014259A1 |
A method of backwashing a filter includes a) supplying a backwash liquid via a conduit toward one end of a filter bed; b) aspirating air into the backwash liquid upstream of the bed; c) introducing a mixture of air and backwash liquid in...
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WO/1998/013122A1 |
A base is disclosed for a filter container and a pump for displacing liquids that flow through the filter container. In order to provide a common base for the filter container and a pump which requires as little standing space as possibl...
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WO/1998/008586A1 |
Improved fluidized bed filters are described and claimed. The filters are exemplified for use in aquarium systems. A preferred embodiment of the filter of the subject invention comprises a cylinder having an inlet port. Water is pumped i...
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WO/1998/006473A1 |
This invention concerns a device for removal or undesired components from liquids using a filtration vessel (4) which has a filter area (3) for absorbing granular loose material (25) with an inlet side (5) located opposite the outlet sid...
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WO/1998/004332A1 |
A concurrent backwash distribution apparatus for a filter (11) having a filter tank (13) and a plurality of underdrain laterals (24) includes a baffle (10) positioned in a common main conduit (12) to define a secondary flume (14) between...
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