Abstract: The present invention relates to a process for treating aqueous effluents from the primary circuit of a nuclear power plant implementing a separation of boric acid using a reverse osmosis membrane, characterized by the fact that it comprises steps consisting of treating the effluents using a multi-stage assembly composed of reverse osmosis modules comprising a membrane with a high boron rejection rate, arranged in parallel and in series, and recycling of the intermediate products to different points in the assembly.

Abstract: Membranes and filtration modules for producing a concentrated feed stream and a diluted feed stream during operation in a water purification or wastewater treatment system. Filtration modules are provided that include a semipermeable membrane having a first side and a second side, the first side configured to receive a first feed solution stream from a first feed solution source and the second side configured to receive a second feed solution stream from a second feed solution source. The semipermeable membrane may be configured to operate at a hydrostatic pressure on the second side of the membrane from about 1% to about 40% of the hydrostatic pressure on the first side of the membrane, and may in some cases exhibit a salt rejection of from about 60 percent to about 90 percent during operation.

Abstract: A system, method and device are disclosed for bio-processing a feed stream and providing a constant output by operating a continuous single-pass tangential-flow process. The single-pass process provides high conversion concentration while operating at relatively low feed flow rates, and the process can also be used to provide constant output diafiltration.

Abstract: A pressure sensor includes a detection element that detects a change in pressure, and a cover member that accommodates the detection element and that includes a first through hole and a second through hole. Each of the first through hole and the second through hole is provided at a position that does not overlap the detection element in a front view of the respective hole.

Abstract: A grease trap for separating waste from wastewater includes a tank having an outer wall, bottom and open top. An inlet invert in the tank receives incoming wastewater, and an outlet invert removes water from the tank. The tank has a cover on the open top, and the cover has a hatch. A barrier spans a diameter of the open top below the cover and has an opening vertically below the hatch. A divider divides the tank into an upper chamber and a lower chamber and has a hole for allowing FOG into the upper chamber from the lower chamber, the hole being colinearly aligned with the hatch and the opening in the barrier.

Abstract: A device for extracting soluble substances dissolved in an aqueous solution, the extraction device including a peripheral wall and an adsorbent agent contained in the peripheral wall, the adsorbent agent being capable of extracting at least one portion of the soluble substances by contact with the aqueous solution, the extraction device also including a maze, defining a circulation path for the aqueous solution within the peripheral wall, the maze including a main inlet and a main outlet of aqueous solution, in fluid communication with one another via the circulation path, the adsorbent agent being arranged inside the maze so as to be placed in contact with the aqueous solution during the circulation of the latter along the circulation path.

Abstract: The device for filtering water, includes a containment body inside which is placed at least a filter element and includes at least a prefiltration chamber, provided with at least an inlet for the water to be filtered, and at least a postfiltration chamber, provided with at least an outlet for the filtered water, the prefiltration chamber and the postfiltration chamber being in communication with the filter element, where the filter element is substantially sheet shaped and defines an open edge.

Abstract: An in-line strainer 1 includes: a cylindrical-shaped housing 2 having an inflow port 6 for liquid and an outflow port 7 which are coaxial with each other; and a strainer element 22 disposed in the housing 2. A cyclone cylindrical body 28 having a diametrically-reduced cylinder portion 30 whose inner diameter is reduced toward one end, and having a cyclone inflow port formed on the other end, is arranged inside the housing 2 such that the diametrically-reduced cylinder portion 30 is close to the inflow port 6, and that the cyclone inflow port is close to the outflow port 7. A cylindrical-shaped strainer element 22 having a closed first end and an open second end is in the cyclone cylindrical body 28, and an open second end 25 of the strainer element 22 is connected to the outflow port 7 of the housing 2.

Abstract: A fuel supply device (1), particularly for an internal combustion engine (6), is equipped with a particulate filter and a water trap. In order to improve the separation effect, while simultaneously reducing the separation material that is required, it is proposed to configure the water trap (5, 8, 30) as a separate component connected downstream of the fuel filer (4) and to provide it with a first separation stage made of coalescent material and a second separation stage made of hydrophobic material, and to dispose the separation stages such that between them the fuel is diverted.

Abstract: The present invention is directed to an alternative compact portable filtration device that can be used in remote locations and includes a single filtration cartridge that provides redundant filtration of the fluid (water). In particular, the device is a dual stage ultrafilter cartridge (apparatus) that is constructed and designed to provide a portable device that can be used in the field, such as during camping or military assignment, and offers two filtration stages (redundant filtration) within a single housing.

Abstract: A hydrodynamic filter includes a first portion, and a second portion which is spaced apart from and faces the first portion. The first portion includes a plurality of protrusions protruding in a first direction, and the second portion includes a plurality of protrusions protruding in a second direction opposite to the first direction. A filtering apparatus including a body which includes a plurality of the hydrodynamic filters and filters a fluid including target molecules, an inlet portion in connection with the body, and an outlet portion in connection with the body.

Abstract: A center tube is disclosed which allows a draw solution to flow through all membrane elements in a membrane system in parallel. The center tube may include a cylindrical wall with two open ends and a barrier element there between separating an upstream chamber and a downstream chamber within the cylindrical wall. At least one non-perforated bypass tube may be located substantially within the cylindrical wall, which extends a length of the downstream chamber and/or the upstream chamber so that the upstream chamber is configured to communicate with a second upstream chamber of a second center tube and/or the downstream chamber is configured to communicate with a second downstream chamber of the second center tube.

Abstract: The present invention is directed to a method for filtering fluid, preferably effluent fluid in a septic system, by providing a staged, filtering array in an effluent flow path, the stages positioned in an orientation designed to maximize filtering capability in conjunction with predetermined apertures.

Abstract: A fuel supply device (1), particularly for an internal combustion engine (6), is equipped with a particulate filter and a water trap. In order to improve the separation effect, while simultaneously reducing the separation material that is required, it is proposed to configure the water trap (5, 8, 30) as a separate component connected downstream of the fuel filer (4) and to provide it with a first separation stage made of coalescent material and a second separation stage made of hydrophobic material, and to dispose the separation stages such that between them the fuel is diverted.

Abstract: A debris catcher uses induced circulation from a venturi to urge debris laden flow into the lower end of a housing. An inlet tube maintains velocity so as to keep the debris moving with the fluid stream as it goes up the inlet tube. A screen fits over the open end of the inlet tube and runs down around the inlet tube toward the entrance of the debris laden fluid into the lower end of the housing. There is a clearance around the cylindrical portion of the screen so some flow can exit that way. There is also an open exit through the top of the screen that can be reached after the fluid stream makes two hairpin turns. Many modules can be stacked. Each module has a large screen area for flow to exit and progressive modules can have smaller screen openings in an uphole flow direction.

Abstract: The present invention is directed to a method for filtering fluid, preferably effluent fluid in a septic system, by providing a staged, filtering array in an effluent flow path, the stages positioned in an orientation designed to maximize filtering capability in conjunction with predetermined apertures.

Abstract: A hydrodynamic filter includes a first portion, and a second portion which is spaced apart from and faces the first portion. The first portion includes a plurality of protrusions protruding in a first direction, and the second portion includes a plurality of protrusions protruding in a second direction opposite to the first direction. A filtering apparatus including a body which includes a plurality of the hydrodynamic filters and filters a fluid including target molecules, an inlet portion in connection with the body, and an outlet portion in connection with the body.

Abstract: A horizontal plate microbial support media. The horizontal plate microbial support media having a plurality of frustum shaped protuberances extending there-from, the frustum shapes having a hole in their upper base for allowing fluid to flow there-through. These media plates able to be stacked for use in a bioreactor.

Abstract: A filter cartridge, which is suitable in particular for purifying dental waste waters, has a housing with three different spatial regions which receive three different filter materials having different filter properties. The first filter material is preceded by a sedimentation space.

Abstract: A labyrinth box can include a housing that has an open end, a closed end, and defines two cavities. A cover is configured to cover the opening and can include a divider that extends into one of the two cavities of the housing to define first and second chamber passageways in that cavity. An inlet port is located in the bottom closed end of one of the cavities and an outlet port is located in the other of the cavities. The surfaces that define the chambers can be configured such that the box can be oriented in different positions and still work, namely, in horizontal and vertical positions. When in the vertical position, the divider can include surfaces that are angled off of the horizontal plane and towards the inlet port such that water and debris will return to the inlet port via gravity.

Abstract: A sink filter device for placing inside a sink bowl of a sink or a shower or tub comprising a first sheet; a second sheet atop the first sheet; and a plurality of pores disposed throughout the first sheet and throughout the second sheet. In some embodiments, the pores are between about 50 ?m to 5 mm in diameter. The second sheet is oriented atop the first sheet such that the pores in the second sheet are slightly aligned with the pores in the first sheet.

Abstract: An in-line strainer 1 includes: a cylindrical-shaped housing 2 having an inflow port 6 for liquid and an outflow port 7 which are coaxial with each other; and a strainer element 22 disposed in the housing 2. A cyclone cylindrical body 28 having a diametrically-reduced cylinder portion 30 whose inner diameter is reduced toward one end, and having a cyclone inflow port formed on the other end, is arranged inside the housing 2 such that the diametrically-reduced cylinder portion 30 is close to the inflow port 6, and that the cyclone inflow port is close to the outflow port 7. A cylindrical-shaped strainer element 22 having a closed first end and an open second end is in the cyclone cylindrical body 28, and an open second end 25 of the strainer element 22 is connected to the outflow port 7 of the housing 2.

Abstract: A microfluidic filtration unit for trapping particles of a predetermined nominal size present in a fluid is provided. The unit comprises a fluid chamber connected to an inlet for introducing the fluid to be filtered and an outlet for discharging filtered fluid, a filtration barrier arranged within the fluid chamber, said filtration barrier comprising a plurality of pillars arranged substantially perpendicular to the path of fluid flow when fluid is introduced into the fluid chamber, said pillars being aligned to form at least one row extending across said path of fluid flow, wherein each of said at least one row of pillars in the filtration barrier comprises at least one fine filtration section comprising a group of pillars that are spaced apart to prevent particles to be filtered from the fluid from moving between adjacent pillars, and at least one coarse filtration section comprising a group of pillars that are spaced apart to permit the movement of particles between adjacent pillars.

Abstract: The present invention is directed to a method for filtering fluid, preferably effluent fluid in a septic system, by providing a staged, filtering array in an effluent flow path, the stages positioned in an orientation designed to maximize filtering capability in conjunction with predetermined aperture positions and dimensions.

Abstract: An aquarium filter cartridge including activated carbon or the like and a housing wherein the water traces an S-shaped path is disclosed. In the S-shaped path the water flows horizontally through a floss type filter, downward to the bottom of the housing, horizontally into the bottom of the carbon cartridge, up through the carbon filter, and out the top or upper side of the housing back into the aquarium.

Abstract: This invention provides a fiber filter and a sewage purifier capable of realizing effective use of the capacity of a treatment tank and being easily manufactured. A fiber filter is formed in a manner that ends of a plurality of fibrous materials made of carbon fibers bundled into a fiber bundle are connected to each other at a fixation part. The fiber filter is used as a filter of an anaerobic filter-bed tank of a sewage purifier. A part, which is not fixed at the fixation part, of the fibrous materials of the fiber filter spreads and develops in a tuft shape in sewage. Thus, the surface area of the fiber filter can be increased. Capacity necessary for treatment of the sewage W can be reduced and effectively used. The fiber filter can be easily manufactured due to its simple constitution.

Abstract: A filter assembly having a proximal end portion and a distal end portion is described. The filter assembly may include a feed inlet located at the proximal end portion and a first filter element in fluid communication with the feed inlet, the first filter element extending between the proximal end portion and the distal end portion of the filter assembly. Additionally, the filter assembly may include a second filter element in fluid communication with the first filter element, the second filter element extending between the distal end portion and the proximal end portion of the filter assembly. The filter assembly may also include a flow deflector located at the distal end portion of the filter assembly, the flow deflector being configured to deflect a flowable mixture exiting the first filter element toward the second filter element.

Abstract: An aquarium filter cartridge including activated carbon or the like and a housing wherein the water traces an S-shaped path is disclosed. In the S-shaped path the water flows horizontally through a floss type filter, downward to the bottom of the housing, horizontally into the bottom of the carbon cartridge, up through the carbon filter, and out the top or upper side of the housing back into the aquarium.

Abstract: A filter cartridge for a standalone point of use water purification device includes tandem first and second flow passageways containing flowthrough filter media that cooperate to provide opposing flow directions in the first and second flow passageways that reduce, if not eliminate, channeling, and provide self-wetting of the flowthrough filter media contained in the tandem first and second flow passageways, eliminating the need for post-use wetting steps.

Abstract: An edge filter assembly is disclosed. The edge filter assembly may include a housing having an inlet and an outlet. The edge filter assembly may further include a filter element disposed within the housing including first and second filter plates and first and second spacers disposed between the first and second filter plates. The spacers and filter plates may be configured and arranged to form a flow channel extending generally radially within the housing and defined between the first and second filter plates and the first and second spacers. The flow channel may have an inner flow gate and an outer flow gate. The inner flow gate may be disposed radially inward of the outer flow gate and may have a different cross-sectional configuration than the outer flow gate. The first filter plate may have an axial projection extending therefrom generally aligned with a fluid path within the housing.

Abstract: A filter unit is disclosed suitable for use in a filter housing. The filter unit comprises superposed and spaced-apart inclined lamellar structures, preferably in the form of hollow truncated cones, each having a lower end side opposite an upper end side and a passage for a flow of liquid between each two of the lamellar structures. Each passage has an inlet for receiving an inflow of liquid to be filtered and an outlet for discharging an outflow of filtered liquid. In each of the passages, an overflow dam wall following a sinuous path is obstructing the flow of liquid and retains particulate matter contained in the liquid. The filter unit is mounted vertically in a filter housing. The invention also concerns a prefilter comprising a filter unit as described above mounted vertically in a filter housing.

Abstract: A method for manufacturing a paste for forming a thick film is provided, in which undesired lump materials are efficiently removed from the paste for forming the thick film. The paste, which contains a solid material and an organic vehicle and has a viscosity in the range of about 1 to 50 Pa·s, is filtrated with a sintered metal type filter manufactured by integrally sintering a nonwoven fabric filter part, having a thickness of many folded linear metal fibers and having a mesh opening size of about 1 to 20 ?m, and a wire gauze part composed of metal wires knitted into the shape of a mesh.

Abstract: Polylactic acid is produced from dimers of lactic acid in an energy saving manner by contacting a lactic acid source via an extraction membrane with an amine carrier solvent to extract lactic acid across the membrane. One or two membranes may be used. After extraction, the aminium lactate salt is crystallized, disassociated and purified.

Abstract: A separation apparatus, in particular intended for separation of amalgam from water, includes a pre-settling chamber, a distribution chamber and a fine settling zone. The fine settling zone includes a plate package, with a plurality of plates fixed with spacing, forming settling channels. The plates can be machined so that they are provided with a large number of fine bumps and recesses.

Abstract: A storage tank includes an oil and water separator in which the frontal area of the coalescers is increased relative to known arrangements of coalescers in oil and water separators. By arranging the coalescers such that the surface area of the coalescers is increased, the efficiency of the coalescers is increased. In some preferred embodiments, the coalescers are arranged in a bank with free flow fluid paths between the coalescers in the bank, each of the paths being closed by a baffle on one end and open on an opposite end, and the baffles are arranged such that the open and closed ends of paths alternate. In other preferred embodiments, the coalescers are arranged in a tubular fashion and fluid flows from the outside surface of the tube through the coalescers and out a central path.

Abstract: A treatment unit is disclosed for treating a fluid in continuous mode. This treatment unit provides the opportunity to carry out simultaneously an enzymatic transformation and a capture of a fluid element. The unit has a reservoir with a fluid inlet for receiving a fluid to be treated and a fluid outlet for releasing a treated fluid. The unit also has removable cassettes provided with a reactive material for treating the fluid and two spaced-apart baffle walls in the reservoir for regulating the flow of the fluid therein. The unit further has a reaction chamber defined between each of the two spaced-apart baffles walls. The reaction chamber has an opening for removably inserting therein the cassette. Yet, the unit further has mounting means for mounting the cassette in a reaction chamber spaced-apart from the two baffle walls, whereby a cassette is disposed between two spaced-apart baffle walls and causes the fluid to flow in a zigzag pattern thus further regulating the flow of the fluid.

Abstract: A filter for filtering particulate matter from liquids adapted to be received in a filter casing having a casing wall and an outlet is provided. The filter includes a filter element having a plurality of openings therein for filtering particulate matter while allowing liquids to pass therethrough, the filter element comprising a first section located proximate to the outlet and a second section adjacent to the first section. The filter element is receivable in the casing and is spaced apart therefrom such that the filter element and the casing wall define a space therebetween. A seal separates the first and second sections and prevents the flow of liquid therearound in the space. The seal is located below the outlet. A lower end member closes a lower end of the filter element, the lower end member preventing the flow of unfiltered liquid and particulate matter into the filter element.

Abstract: A sequential flow filtration chamber for treatment of waste water effluent from a septic tank comprises an inlet positioned in fluid communication with the septic tank for receiving waste water into the chamber, at least one partition positioned within the chamber so as to define a substantially sequential flow path for the waste water, a filter positioned within the flow path for filtering the waste water flowing therethrough, and an outlet positioned in fluid communication with the flow path for discharging filtered waste water from the chamber. The chamber may include a sequential flow path disposed substantially vertically or substantially horizontally. A sequential flow nitrification drain field for filtration treatment of waste water comprises a source of waste water, and at least one sequential flow filtration chamber. The source of waste water for the drain field is preferably a septic tank. The drain field may comprise a plurality of chambers connected in fluid communication.

Abstract: A filter and housing for waste water treatment includes a housing having a plurality of coaxially mounted vertically extending sections adaptable to receive a filter cartridge therein. An upper section is provided with an outlet consisting of at least two coaxially aligned rings of preselected diameters wherein the thickness of the rings and the spacing between the rings is sufficient to receive waste water treatment outlets of different diameters. The filter cartridge is comprised of a stacked arrangement of a plurality of disc-dam units wherein each disc-dam unit is provided with a serpentine configured first dam, the first dam extending upwardly from an upper surface of the disc-dam unit, the first dam having terminating ends spaced at outer terminating edges of the disc dam unit to define a cord segment therebetween. The terminating ends are connected by a second dam having a height less than the first dam.

Abstract: A chip treatment device 100 includes a box-shaped housing 110, and an upper surface panel 112 of the housing is connected to a sloped portion 114. The interiors of the housing 110 is divided into upper and lower areas by a partition panel 130, and to the areas are provided a first cutting fluid bath 150 and a second cutting fluid bath 160. Chains 240 stretched between driving sprockets 210 and chain guide units 230 are equipped with scraper units 250 moving in the direction of the arrow. The chips coming in from an entrance opening 180 is separated from cutting fluid while being conveyed on the separation panel 130. First and second filter units 170, 300 filter said cutting fluid.

Abstract: An apparatus for removing floating and subsurface contaminants from a machine tool coolant bath is disclosed. The apparatus comprises a floating skimmer for collecting floating contaminants from the surface of the bath connected to an oil trap having an imperforate shell with a fluid tight column extending below the interface. A return conduit and a positive displacement pump are in series with the skimmer and oil trap. A submersible pump is disposed in the bath near the bottom for collection of water and water density contaminants and is connected to a remote filter assembly having a housing and a removable filter element. The filter assembly and the oil trap are both accessible without affecting the operation of the machine.

Abstract: An effluent filter for septic tanks and the like has substantially horizontal filtering levels provided in a stepped arrangement on both an inlet side and an outlet side of the effluent filter. The effluent filter provides an array of both substantially horizontal and vertical filtering slits through which effluent must pass to reach the outlet side and exit the septic system. Particles in the effluent must navigate tortuous paths created by the array of filtering slits and are trapped by these filtering slits, rather than being allowed to exit the septic system with the filtered effluent. The effluent filter is flexible and is further provided with integral external flexible wiper blades that serve to improve a friction fit between the effluent filter and an associated T baffle, sanitary T baffle, or other pipe component, as well as prevent particles in the effluent from circumventing the effluent filter.

Abstract: A pretreatment system and a pretreatment method for recycling exhaust water, for purifying exhaust water to a water quality acceptable to ordinary water-purification equipment, has advantages of small space occupation, low energy consumption, and lower cost. By providing a mixing piping with coarse interior, a series of closed micro continuous stirred tank reactors can be established inside the pipe to form plenty of turbulent regions for thoroughly mixing the chemical and the exhaust water. Flocculent gels that carry pollutants and particles of the exhaust water then can be removed by a filtering unit, for purifying the exhaust water. Also, by providing a modified silt density index, the pollution of a sample water can be clearly scaled and monitored.

Abstract: A filtration device for tank water for aquarium fish having several partitions dividing the casing into several filtration chambers. A removable filtration cartridge is inserted into each filtration chamber. The cartridge has top and bottom panels with perforations formed in the panels to allow water to flow through the cartridge. The partitions are arranged in an alternating pattern. One partition has an opening near the bottom of the casing, and the partition extends to the top of the casing. The next partition does not have an opening near the bottom of the casing and the partition does not reach the top of the casing. This arrangement allows water to flow through the filtration device in a zigzag pattern. The removable cartridges allow individual filter mediums to be replaced without removing all the beneficial bacteria from the system.

Abstract: A sewage filtration system for efficiently filtering sewage waste material from smaller residential areas without the use of expensive sewage treatment plants. The inventive device includes a conventional septic tank connected to each building structure's sewage system, a pair of fluidly connected two compartment tanks connected to the conventional septic tanks, and a final phase filtering tank fluidly connected to the pair of two compartment tanks. The final phase filtering tank comprises a tank, a cover, an inlet tube, an outlet tube, a first tube connected to the outlet tube, a second tube fluidly connected to the first tube wherein the second tube is water permeable, at least one sand or gravel layer above the second tube, a layered filter structure above the sand or gravel layer that receives the filtered liquid from the inlet tube.

Abstract: An apparatus for filtering and cooling liquid, with four filtration chambers are connected by a series of passageways. The apparatus is mounted on a cart so that it may be rolled into position under a machine quickly and easily. Once the apparatus is in position, the machine is drained of its debris-laden oil which flows directly into the first chamber and through the first wire mesh filter. The liquid is then forced either by gravity or by pressure through the remaining chambers and their respective filters which have progressively smaller pore sizes. The tortuous movement of the liquid around the weirs helps to cool the liquid while the filters remove foreign particles from the liquid. Once the liquid reaches the fourth chamber, a pump is used to pump the cleansed liquid back into the machine so that it may be reused. The inlet to the pump may be fitted with an optional fifth filter element.

Abstract: A filter for treating liquids comprises an elongate housing having a liquid inlet port, an outlet port for concentrated liquid and a permeate discharge port. Extending through the housing is a parallel array of filter tubes, each having a permeable wall so that permeate passes into a common chamber defined by the housing. Manifold members, located at each end of the housing, are provided with channel means which communicate with the ends of the tubes. In use, the channel means direct the liquid along at least three passes through the tubes, the volume of liquid being reduced between the first and final passes so as to maintain the desired flow velocity. Each pass comprises a group of tubes, and the liquid may pass through seven or eleven groups of tubes.

Abstract: A pressurized dynamic pulp washer including an annular hollow housing in which the stock is driven axially along a plurality of stationary, annular, coaxial wash filters in axially reversible directions, with an annular rotatable shell between the wash filters to urge liquid through openings in the filters, to generate axial, radial and circumferential velocities in the slurry to create localized pulses in the slurry to urge liquid through the filters with wash liquid being introduced to replace liquid filtered from the fibers in the slurry.

Abstract: A liquid filter apparatus particularly useful in removing particulates from parts washing solvent. A filter assembly includes an exterior, fluid-impermeable container, preferably in the form of a flexible sidewall bag, and an interior filter element with permeable sidewalls and inlet and outlet ends, preferably in the form of a sleeve. In use, liquid entering the sleeve may pass unfiltered entirely through the sleeve and exit through a sidewall of the exterior container, or all or any part of such liquid may pass through the filter sleeve and into a portion of the apparatus outside the sleeve but inside the exterior container. From this portion, the liquid emerges in a filtered condition. Consequently, the filter continually operates in both filtration and bypass modes.

Abstract: A differential housing includes magnetic filters for removing metal particulate from oil circulating within the differential mechanism of a vehicle. The differential housing also permits the level and temperature of the oil to be monitored.