Abstract: A water treatment system including a plurality of treatment tanks containing a water treatment material and defining a fluid flow path through the material extending between a first tank port and a second tank port. A first remotely controlled three way valve associated with the first tank port controls the fluid communication of a source manifold and a regeneration discharge manifold with the first tank port of each tank. A second, remotely controlled three way valve controls the fluid communication of a product receiving manifold and a regeneration chemistry supply manifold with the second port of each tank. A regeneration control monitors the loading of each tank and initiates regeneration in a given tank when that tank reaches a predetermined exhaustion level.

Abstract: A two-chamber vessel provides for separate treatment of a fluid stream with particulate solids. Separate means are provided to introduce and remove particulate solids into each chamber. Separate means are provided to introduce and recover fluids from each chamber. The chambers may be operated in series or in parallel or for unrelated treatments. In a preferred embodiment, all of the inlet conduits for both chambers are presented at one end of the vessel.

Abstract: A liquid filter has a housing with a bottom and a top. A vertical partition divides the housing into an inlet chamber on one side and an outlet chamber on the other side. One type of filtration material is located in the inlet chamber. Another type is located in the outlet chamber. The inlet to the inlet chamber is located in the bottom of the housing and results in an upward flow through the inlet chamber. The outlet chamber has an outlet located in the bottom. A port locates at the top of the partition. This results in a downward flow through the outlet chamber.

Abstract: A portable, household water purifier is disclosed. The water purifier generally comprises a housing adapted to rest on a kitchen counter-top, a tank mounted inside the housing for receiving untreated water, a water treatment system mounted inside the housing, a means for pumping the water through the treatment system, and a means for refrigerating the treated water.

Abstract: A water purifying device which includes a plurality of barrels connected one after another by means of thread engagements into an elongated tube having an inlet end and an outlet end. A number of the barrels are loaded with filtering materials such as cloth and charcoal for filtering out solids. One barrel contains an ultraviolet lamp device for destroying microorganisms, spores and the like contained in water to be purified.

Abstract: A water purifying device including a cartridge type container which comprises an outer cylinder, an intermediate cylinder and an inner cylinder which are concentrically arranged in a compact housing of the purifying device. The outer and intermediate cylinders are connected at the top, the intermediate and inner cylinders are connected at the bottom, and the cylinders are filled with water purifying materials such as high purity active carbon, silver-somelite and ceramic balls so that water taken in via the housing's water inlet is purified while it flows through the three cylinders and is taken out through the housing's water outlet.

Abstract: A manifold system is constructed for evenly distributing a liquid to, and/or evenly collecting a liquid from, a cell of a separator system. The flow paths between the manifold inlet(s) and manifold outlet(s) are all approximately hydraulically identical in numbers, types, and dimensions of flow components, such that: (a) the flow rates to/from each of multiple inlets/outlets is equivalent, even with changes in overall pressure drop or flow rate, and (b) the time required for liquid to traverse each of the manifold flow paths is approximately identical, enabling plug flow through the cell.

Abstract: An arrangement for operation to reduce organic contaminant concentration in water passing therethrough as provided. The arrangement includes at least one reactor comprising a plurality of treatment chambers oriented in series, each chamber including an upstream downcomer portion and a downstream column portion separated by a wall member. Fluid flow is provided between a downcomer portion and the column portion. Means are provided such that water can flow through any associated chamber by introduction into an upper portion of the downcomer portion of the chamber, with passage downwardly to a feed space and a bottom portion of the column portion of the chamber and upwardly through the column portion. The water then flows outwardly from the chamber, into a next downstream chamber if one is provided.

Abstract: An electronic memory panel assembly controls the operation of a portable water purification system which has a reverse osmosis unit having an inlet. The assembly includes a solenoid device with piping having an inlet end fitting for attachment to a source of water to be purified, an outlet end fitting for attachment to the inlet of the reverse osmosis unit, a normally closed valve in the piping, and a solenoid having terminals which when activated will open the valve to cause automatic operation of the purification system. The assembly also includes a control device for automatically controlling the solenoid in accordance with predetermined criteria.

Abstract: Water is allowed to flow in parallel into a mixed bed in which an anion exchange resin and a cation exchange resin are disposed in a mixed state and into a single bed in which an anion exchange resin or a cation exchange resin is disposed. As the proportion of the flow rates of water introduced into the two beds is adjusted, the pH and electrical conductivity of water is controlled. Control is effected in such a manner that the pH and electrical conductivity of water are maintained at appropriate levels without using any chemicals.

Abstract: A liquid filtration device includes a tubular container having an end wall at one end with an emptying orifice therein and a detachable cover closing the opposite end. A filling orifice is disposed in the container adjacent to the cover and a fixed filter is secured in the container immediately adjacent the emptying orifice. A movable filter is disposed in the container for movement between the cover and the fixed filter by means of an operating component connected to the movable filter and extending outwardly of the container.

Abstract: A method and apparatus for the continuous treatment of fluid with a contact media. The apparatus includes a plurality of vertically arranged chambers through which the fluid flow passes. The contact media may be selectively removed from each chamber and moved to a tank for regeneration. Additionally, the contact media may be selectively moved from one chamber to another.

Abstract: Water is demineralized by passage through a water demineralization system. The water demineralization system comprises a series of at least three ion exchange resin zones. The sequential series comprises a strong acid cation (SAC) resin zone, a first anion resin zone, and a weak acid cation (WAC) resin zone. The SAC resin zone comprises a SAC resin for removing cations from the water, the first anion resin zone comprises an anion resin for removing anions from the water, and the WAC resin zone comprises a WAC resin for removing cations from water without substantially splitting any salts present in the water. Means for connecting each resin zone in the series are provided so that water can pass sequentially through the system. A method is also provided for regenerating the WAC resin from sodium and ammonium exhaustants. This method comprises contacting the WAC resin with an aqueous solution of a regenerant that is substantially devoid of sulfur and halogen groups.

Abstract: A filtering system for use with fish-containing ponds and bodies of water is disclosed. More particularly, the filtering system includes chambers for harboring micro-organisms which clean organic waste from the water flowing therethrough from the pond. The chambers include by-pass conduits so that a given chamber may be taken out of service for cleaning without interrupting the flow of water through the rest of the system. Further, movable walls are provided so that several chambers contained in a single structure may be varied in number and in size according to a pond's requirements. Also included is an air manifold for use in supplying air to the micro-organisms.

Abstract: A method for purifying water or other aqueous media in which a stream of the aqueous media is introduced into a fixed bed of a purification media and turbulent flow through the fixed bed is induced to permit intimate contact between the aqueous media and the purification media. Also disclosed is an apparatus for purifying the aqueous media which includes an outer housing having an inlet aperture and an outlet aperture; a multi-chamber purification unit disposed within the housing, and means for measuring the purity of aqueous media treated within the multi-chamber unit.

Abstract: A method and apparatus for selectively recovering ions from an aqueous solution and producing deionized water for reuse. When used in a nickel plating process, a rinse water stream is passed through a first cation removing assembly that contains an ion exchange media having a greater affinity for nickel ions than for most or all other ions present in the system. Rinse water processed by the first cation removing assembly is conveyed to a second cation removing assembly and then to an anion removing assembly so that deionized water is produced and is then returned to a rinse bath. Rinse water is passed through the first ion exchange media until substantially all of the ion exchange sites hold a nickel ion. The other cations in the rinse water are captured by the second cation assembly. The first cation assembly is regenerated using a regeneration solution compatible with the plating bath.

Abstract: An apparatus for purifying and neutralizing residues from furnaces burning liquid or gaseous fuels comprising a settling tank having an inlet for the liquid containing the residues, at least one oil absorption body in the settling tank, and a clean water tank separated from the settling tank by at least one filter. The pH in the clean water tank is raised, and a filtration unit contains activated carbon between the clean water tank and outlet.

Abstract: Disclosed is a simple, economical ion exchange system for cleaning water, particularly rinse water from plating operations. Two or more identical cannisters with clear plastic sidewalls are connected in series and each contains resin in a central zone for removing anions or cations from water pumped from a reservoir through the cannisters. The resin material is held between permeable separator plates which also define inlet and outlet plenums accessible through openings in the sidewall near opposite ends of each cannister. The identical cannisters are stackable in one or more vertical arrays containing any suitable number of cannisters. Standard screw-type pipe fittings connect the inlet and outlet of successive cannisters to facilitate rapid disassembly of a multi-cannister ion exchange system and removal/replacement of cannisters whose resin requires regeneration.

Abstract: A water conditioning system which employs a blend of sodium cation exchange resins and chloride anion exchange resins in a common tank and means for regenerating the resins in a specified sequence to prevent build-up of impurities in the resin bed.

Abstract: A separator comprises a central casing including an upper disk and a lower disk, both disks having a plurality of openings, and a plurality of columns extending between the upper and lower disks and in communication with the plurality of openings, an upper casing including a disk disposed in contact with the upper disk of the central casing and having a plurality of openings, and a plurality of columns extending upwardly from the upper surface of the disk and in communication with the plurality of columns of the central casing, a lower casing including a disk disposed in contact with the lower disk of the central casing and having a plurality of openings, and a plurality of columns extending downwardly from the lower surface of the disk and in communication with the plurality of columns of the central casing, and a plurality of receptacles disposed within the plurality of columns. The upper and lower casings are rotated so that the receptacles can be circulated through the columns.

Abstract: A water treatment apparatus for use in a post-mix beverage dispenser enables purification of water, removal of water hardness and sterilization of water which is normally accomplished by a precipitation/floculation process used in a bottling plant. This apparatus can treat the water for beverage dispensing purposes and will not require high capital expenditures. The apparatus includes a removable, disposable cartridge having a reactor or first section filled with sand, carbon granules or other heat-conducting material for removing the bicarbonate content and other impurities from the water and a filter or second section having a filter and activated carbon screen for removing solids, traces of chlorine and dissolved organic material from the water. The apparatus also includes heat exchanger coils and a heating element for raising the temperature of the water as well as a holding tank having a gas trap for collecting and removing carbon dioxide and chlorine gas.

Abstract: A method and apparatus for reducing chemical oxygen demand levels in water which includes the steps of:(a) mixing the water to be treated with at least one oxygen source;(b) contacting the water with a first, activated alumina catalyst;(c) contacting the water with a catalyst selected from the group consisting of Group VIIIB metals, Group IB metals, or mixtures thereof;(d) reacting chemical contaminants in the water with the oxgen source; and finally(e) contacting the water with an adsorptive material such as activated carbon.The present invention also includes a method and apparatus for regenerating the catalyst in situ by contacting the catalyst with alkaline and acidic aqueous inorganic regeneration solutions.

Abstract: A water treatment system including a pair of tank assemblies 110, 112 interconnected by a valve module 114 for controlling the communication of water to be treated to an on-line tank and the regeneration of an exhausted tank. Each tank assembly includes a compartment containing a water softening resin 125 and a compartment centering an iron filter media. The valve module is connected to a regeneration solution reservoir 150 by brine conduits 164, 220. A pumping assembly 192 automatically transfers a predetermined amount of a supplemental regenerant fluid from a well 168 into the regeneration solution reservoir at the conclusion of a regeneration cycle. The pumping assembly includes upper and lower chambers 194a, 196a communicating with the supplemental regenerant fluid reservoir 168 and brine supply conduits 164, 220 respectively.

Abstract: A water treatment system having an apparatus (2) for the intensive pretreatment of the untreated water with ozone, having a downstream filter (3) with reducing action, and also having an apparatus (4) for the post-disinfection is improved in that the excess ozone which accumulates in the upper part (17) of the filter tank and which is added to the water during the pretreatment is removed anhydrously and fed into the apparatus for the post-treatment of the filtered water. The post-treatment takes place preferably in a retention vessel (4) filled with packing material (15) in which the water comes into contact with ozone by surface contact. The water level (24) is kept constant by regulating the gas discharge from the retention vessel (4). (Illustrated by drawing).

Abstract: The present invention relates to a device for purifying water, the device being an elongated container having an inlet and an outlet and comprising succesive adjacent sections being a. a disinfecting area, b. a membrane or filter medium having pores with a diameter of max. of about 0.2.mu. and c. granular activated carbon. The disinfecting area is suitably a mixture of crystalline iodine with a suitable strong anionic exchanger, preferably in a ratio of 15:85.The device may comprise in addition one or more of the following section: a. filtering section; b. a microscopic filter having pores with a diameter of max. 0.5.mu. and/or c. bacteriostatic carbon.

Abstract: An apparatus for purifying drinking water by a combination of reverses osmosis, deionization by ion exchange resins, resin and final passage through activated carbon. The components for reverse osmosis, de-ionization, and passage through active carbon, and a product water reservoir are housed in a cabinet suitable for placement in a home. Ionic impurities are removed by reverse osmosis through a cellulose acetate membrane which feeds the flux water to a mixed resin bed for deionization. Waste brine is removed from the reverse osmosis module by controlled leakage to maintain concentration at a low level. The product water is filtered through a cartridge of granular activated carbon prior to being stored in a product water reservoir. An attachment is connectable with the tap water faucet to provide tap water to the unit at main water supply pressure and to dispose of waste brine water and excess product water. Components are replaceable and available on the market.

Abstract: A filter bed for separating large quantities of water from granulated blast furnace slag consisting of layers of solid matter, preferably gravel, of various grain sizes is presented. The filter mass (solid matter) is in individual adjacent containers or housings preferably comprised of sheet steel which are closed on all sides and have removable covers. The covers, the bottoms of the containers and the sides of the containers are all perforated to permit filtrate passage. The perforated sheets comprising the covers are all individually replaceable.

Abstract: A back rinse arrangement for ion exchange resin in an ion exchange bed through which a liquid to be treated flows in a substantially vertical direction to have contaminants captured therefrom in the ion exchange resin includes an inlet chamber arranged at a lower region of the fixed bed, an injector that opens into the inlet chamber and has a transporting and rinsing liquid selectively supplied thereto, and a conveying and cleansing pipe which extends vertically through the fixed bed and provided with an outlet opening at its upper end. The particulate ion exchange resin, which is particulate or granular, is gradually withdrawn by the flowing transporting and rinsing liquid from the lower region of the fixed bed, and is conveyed through the conveying and cleansing pipe, with simultaneous performance of a cleansing action, to the upper region of the fixed body which gradually descends as the ion exchange material is being withdrawn from its bottom region.

Abstract: A water treatment system including a pair of tank assemblies 110, 112 interconnected by a valve module 114 for controlling the communication of water to be treated to an on-line tank and the regeneration of an exhausted tank. Each tank assembly includes a compartment containing a water softening resing 125 and a compartment centering an iron filter media. The valve module is connected to a regeneration solution reservoir 150 by brine conduits 164, 220. A pumping assembly 192 automatically transfers a predetermined amount of a supplemental regenerant fluid from a well 168 into the regeneration solution reservoir at the conclusion of a regeneration cycle. The pumping assembly includes upper and lower chambers 194a, 196a communicating with the supplemental regenerant fluid reservoir 168 and brine supply conduits 164, 220 respectively.

Abstract: The disclosure describes a sorbing apparatus including at least one chamber having first and second ports and defining a fluid flow path between the first and second ports. The chamber includes a bed of sorbent particles which are bound to one another by a polymeric binding agent that prevents movement of the particles with respect to one another. The apparatus further comprises a fluid controller which alternately directs a fluid having a first concentration of a component through the bed of sorbent particles wherein the bed sorbs the component from the fluid and directs a purging fluid through the bed of sorbent particles wherein the bed is regenerated.

Abstract: A process for treating wash water from the manufacture of terephthalic acid, wherein the wash water includes terephthalic acid, metal catalyst, and organic acid byproducts. The process includes the steps of passing the wash water through a filter medium to remove undissolved terephthalic acid solids, passing the filtered water through a cation exchange resin in hydrogen ion form to remove the metal catalysts, and passing the water through an anion exchange resin to remove dissolved terephthalic acid and dissolved organic acid byproducts. The treated water and certain components removed from the wash water are recovered and reused in the manufacture of additional terephthalic acid. An apparatus in which the process is practiced is also described and, after a quantity of wash water has been treated, the apparatus is regenerated with regenerants that are also recovered and reused in the manufacture of additional terephthalic acid.

Abstract: A fixed bed layer of a reactor column for the execution of anaerobic decosition processes, which column is divided by screen partitions into segments one above another with intermediate spaces for gas discharge from the column through discharge funnels into one or more corresponding, ascending pipes. Additional devices for the introduction of liquid or gas into the individual fixed bed segments produce turbulence and remove excess sludge from the fixed bed layer. Annular guide elements project from the inner wall of the column underneath the funnel and have a constricted cross section which defines an annular channel to the next column segment. Thus, a liquid stream is not blocked during optimal gas collection in the funnel. The funnels are preferably installed in the screen floor of the subsequent column segment.

Abstract: A mobile fluid purification unit comprises a plurality of treatment tanks mounted on a skid and interconnected by hoses for series flow, parallel flow or a combination of series and parallel flow for carrying out a variety of treatments of the liquid. A plurality of such mobile units can be mounted on a larger vehicle and connected to one another by one or several hoses to provide greater capacity and variety than is possible in a single mobile unit. A cover which may include a heater can be provided for the unit or units.

Abstract: A system to remove contaminants from water includes, in the pressurized water flow lines, a venturi nozzle assembly to entrain air in the water, a pressure tank to store and deliver the air laden water, an aerator/precipitator tank assembly to remove the excess air and any residual gases from the water in the pressurized system and to remove contaminants from the water and a filter tank having a filtration bed therein to remove the remaining precipitated contaminants from the water and to deliver the water to service.

Abstract: A water-deionizing system comprising a reservoir for receiving a quantity of water to be deionized, a first ion-exchanger unit capable of removing anions from said water, and a second ion-exchanger unit capable of removing cations from said water. The first and second ion-exchanger units are connected to said reservoir to form separate flow paths or circuits for circulating water from the reservoir through the units separately in parallel. The system permits efficient production of a relatively large amount of water in a batchwise operation and also facilitates the regeneration of saturated ion-exchangers.

Abstract: The filter comprises a pressure vessel, which contains vertically spaced apart partitions for supporting respective layers of a particulate filtering material. In order to ensure that the result of the filtration will not be influenced by fluctuations of the flow, pressure and temperature conditions of the solids-laden fluid to be filtered, each layer of filtering material is enclosed by a sheath, which is permeable to the fluid to be filtered and impermeable to the filtering material and which together with said filtering material constitutes a filtering package, which is engaged at its top and bottom by two of said partitions and is compressed by said partitions under constant pressure. The partitions engaging each of said filtering packages at its top and bottom define with said filtering package passages for the supply of said solids-laden fluid to said filtering package and for withdrawing filtrate from said package.

Abstract: A water demineralizer system and method is provided in which at least three beds of resin particles are connected in series flow arrangement preferably within a single vessel for substantially removing metal ions such as calcium and magnesium from water feed by exchange with hydrogen ions. The raw feed water flows first through an upper cation resin bed, then through an intermediate anion resin bed, and then through a lower bed of mixed cation and anion resins, and preferably flows downwardly through the beds. After the resin beds become saturated with metal ions from the feed water, mainly by calcium and magnesium ions, the beds are regenerated by first backwashing with water, then chemically treating with acid and caustic solution, followed by bed rinsing, air mixing and backflushing with water prior to further use for demineralizing the feed water.

Abstract: An apparatus for universal water treatment with cylindrical housing and rotating ring-baskets, in which the housing is provided with untreated water inlet and purified water outlet stubs and the rotating filter baskets contains a back-washing chamber for regeneration of the baskets. The rotary filter baskets contain also an annular coagulating space formed in the cylindrical housing connected to the untreated water inlet stub. The rotating filter baskets are arranged uniaxially with the coagulation space and with each other. The filter baskets may be arranged within or above each other. Several filter beds are arranged in the filter baskets separated from each other and provided with independent back-washing chamber. The filter beds are arranged between cylindrical, perforated partition walls.

Abstract: A system for water treatment includes the steps of superchlorinating the water to a level sufficient to destroy bacterial content in the water very rapidly, passing the water through a sand filter in which the medium includes beads of magnesium hydroxide and subjecting different portions of the filtered water to differing degrees of filtration by an activated charcoal filter, whereby to remove a sufficient proportion of the chlorine added to the water to reduce the residual chlorine to a level sufficient to maintain the water sterile without substantially influencing the taste of the water. Preferably, the sand and charcoal filters are disposed horizontally, and the depths of the filter beds are graded horizontally to provide the differing degrees of filtration to the water.

Abstract: A system for producing deionized water comprising at least a pair of oppositely charged ion exchanger units connected in series, a pump, a sensor for detecting the level of specific conductivity of process water and lines connecting the pump, ion exchanger unit and sensor in a closed-loop flow circuit. A controller operates the system in a first mode in which a batch of process water is repeatedly circulated along the closed-loop flow circuit until the specific conductivity sensed is less than a first predetermined level and alternately in a second mode in which the batch of water so treated is discharged while another batch of water is introduced into the system until the specific conductivity sensed is greater than a second predetermined level which is higher than the first predetermined level.

Abstract: A water filtration system is provided by an upflow filter vessel containing a buoyant filter media in series with a downstream downflow filter vessel containing a nonbuoyant filter media. The buoyant media filter vessel and nonbuoyant media filter vessel comprise two compartments of a common tank, separated by a central wall. Water from the upflow filter vessel passes over the top of this wall, or through one or more openings in this wall, to the downflow filter vessel. A common waste trough extends from one end of the tank to the other. Weir plates are fastened to the upper edges of this trough such that the trough steps upwardly in elevation at the central wall. Waste materials from the upflow filter vessel pass over the lower of these weir plates and into the waste trough during cleaning of the buoyant media filter. In contrast, waste materials from the nonbuoyant media filter flow over the upper weir plates and into the trough during cleaning of this latter filter.

Abstract: Apparatus for separating solid particles, such as amalgam waste from the waste water from dentists' surgical units, employs at least one filter body through which the liquid flows and which consists of a filter medium enclosed between two perforated walls, and at least one sedimentation zone. The filter medium consists of balls of alumina having a diameter of 0.05-15 mm and a density such that the balls float in or are carried along by the liquid flowing through the filter body. The balls, which do not fill out the entire volume between the perforated walls (although they fill out the cross-sectional area of the filter body), rub against each other in the flowing liquid, so that the filter body is self-cleaning.

Abstract: High rate filtration system includes an upflow filter vessel containing a bed of buoyant media followed by a downflow filter vessel containing a bed of nonbuoyant media. The upflow filter vessel is unobstructed by cross-sectional, media-confining screens. A horizontal trough structure collects filter effluent and makes it possible to clean the bed by diffusing air into the liquid below the bed so that average fluid density in the bed is reduced. The reduction in fluid density results in expansion of the bed as media particles descend by gravity.

Abstract: A dual container portable water conditioner for domestic use wherein the containers are removably coupled in a vertical position and include flow diversion means therein to reduce channeling of the conditioning medium.

Abstract: Apparatus for reducing levels of organic contaminants present in water or other fluid. The apparatus includes a plurality of spaced activated carbon beds and a bed of cross-linked organic polymer particles (i.e., Imbiber Beads). The bed of polymer particles is serially disposed between the activated beds of carbon to receive and absorb organic contaminants when all the adsorption sites on the first activated carbon bed reach saturation. A second activated carbon bed receives and adsorbs contaminants which escape the absorption of the polymer particles. The polymer particles swell on contact with organic contaminants to decrease and then terminate flow of water or other fluid through the apparatus.

Abstract: A filter cartridge for use with liquids or gases which includes a back structure having a plurality of channels formed in it and filtration granules contained within the channels. Each of the channels includes a plurality of holes to enable water to pass through the back structure. A filter element is secured to the front of the back structure to cover the channels. The provision of the channels enables a uniform distribution of filtration granules to be maintained throughout the filter cartridge.

Abstract: An ion exchange water purification apparatus in a unitary housing which makes use of gravity and a manometer effect to flow water through the water treatment beds. The apparatus has an untreated water reservoir at the top, untreated water flows by gravity and the manometer effect through a series of three water treatment beds containing carbon, cation exchange resin and anion exchange resin, respectively. The media in each water treatment chamber is in cartridge form and may be easily removed through the removable top of each water treatment chamber. Treated water from the final water treatment chamber is collected in a reservoir within the housing below the untreated water reservoir. The three water treatment chambers are located within the treated water reservoir to economize on space.

Abstract: An apparatus for the countercurrent treatment of liquids with adsorbents in an adsorption-filter the space of which is divided by trays which are permeable to liquids into at least 2 chambers, in which before and/or during the charging of the adsorbent in the upward flow, the regeneration of the charged adsorbent in the downward flow and the backwasting in the upward flow particular levels to which the industrial chambers are filled are established by transferring adsorbent from one chamber to the adjacent chamber.

Abstract: An effluent water filter device and method comprised of a cellular grid packed with an activated carbon and enclosed in a housing. The cellular grid is formed of a bacteria retarding material such as stainless steel. The housing is formed of a frame having screens on either side and locking end cap rings. The filter pack may be in any shape either rectangular or cylindrical.

Abstract: A filtration process and apparatus for the removal of solids from liquids is provided having a filter bed vertically disposed in a chamber which has a solids-containing liquid passed horizontally therethrough. The filter bed is regenerated after becoming loaded with solids. During filtering the liquid is divided into at least two partial streams, and each partial stream is conducted through a respective filter bed arranged in a chamber, which is comprised of reticulated particles of polyurethane. After the particles have been completely loaded with the solids, the liquid feed to and the liquid discharge from the respective chamber are interrupted. The solids adhereing to the particles are then transferred by agitation and/or gas treatment into a liquid volume remaining in the chamber, and the liquid volume is discharged together with the solids. The process is especially adaptable to be utilized in wastewater treatment, or for the removal of solids from scrubbing media.