Abstract: A filter device including a probe where a filter element probe first end selectively engages with a sensing unit located in a filter head and a filter element probe second end is located in a contaminant portion of a filter canister. The probe fixedly engages through the filter element utilizing a sealing component. The filter element is disposed in the filter canister that engages with the filter head.

Abstract: A cover for a wastewater treatment unit is disclosed. The cover may include a retractable awning, a frame, and at least one rotating shaft. The retractable awning may be configured to cover the wastewater treatment unit when extended and allow access to the wastewater treatment unit when retracted. The retractable awning may be configured to protect the wastewater treatment unit from ultraviolet light. The frame may be provided to support the retractable awning above the wastewater treatment unit at an incline angle. The angle may allow visibility into the wastewater treatment unit when the retractable awning is extended. The frame may further include a handrail. A system including the wastewater treatment unit positioned within a basin and the cover is also disclosed. Methods of retrofitting a wastewater treatment system and methods of facilitating protection of a wastewater treatment unit are also disclosed.

Abstract: A mold test apparatus includes a mold support plate having a top surface on which a mold is mounted, wherein the mold support plate includes a plurality of test suction pipes communicating with paths in the mold, vacuum pipes each having one end connected to one of the plurality of test suction pipes, a pump connected to the other end of the pipe, and at least one pressure sensor configured to measure a pressure of the vacuum pipe, wherein the paths communicate with adsorption holes provided in a top surface of the mold, and wherein the at least one pressure sensor includes a determining unit configured to determine whether the adsorption holes are clogged by using the measured pressure.

Abstract: The present invention relates to modification to permeate channels and permeate materials in a cross-flow filtration system to improve performance in counter current filtration having both retentate channels and permeate channels wherein a solution is pumped through one of the channels and drawn through a membrane to one of the other channels to assist in positive pressure driven filtration by using the osmotic pressure, concentration, or preferential solubility difference between the retentate and permeate flow streams thereby increasing or altering the flux through the membrane separating the flow streams.

Abstract: The present invention is directed to methods, devices and kits for separating, accumulating, characterizing and/or identifying microorganisms in a test sample. The method of the invention includes optionally lysing non-microorganism cells and/or particulates that may be present in a test sample, followed by a subsequent filtration step for isolation and/or accumulation of microorganisms. The filtration and sample transfer device may be used for isolation and/or accumulation of microorganisms by filtration. Once the microorganisms have been filtered for isolation and/or accumulation, the microorganisms can be analyzed to acquire measurements for the characterization and/or identification of said microorganisms.

Abstract: A submerged membrane separator includes: a plurality of membrane cartridges arranged at predetermined spaces; a flow generating device for generating flows in one direction along the membrane surfaces of the membrane cartridges; and wall members on both sides of a channel of the flow in the one direction formed between the membrane cartridges adjacent to each other. The membrane cartridges can be attached and detached from another direction substantially orthogonal to the flows in the one direction and substantially orthogonal to the arrangement direction of the membrane cartridges.

Abstract: The invention relates to a method for sealing a filter chamber of a filter device, comprising a sequence of steps, including moving the recess plate close to the adjacent recess plate for building the pack, and securing the recess plate to the adjacent recess plate, piping a suspension into the filter chamber on a cake side of a filter cloth, letting a solid content of the suspension settle on the filter cloth as a filter cake, and a liquid fraction of the suspension permeate the filter cloth to a filtrate side thereof, and discharging the filtrate out of the filter chamber. The invention further relates to a recess plate for use in a filter device, the recess plate comprising a recess, and a groove encircling the recess, the groove being adapted to receive a sealing ring for sealing a filter chamber.

Abstract: An apparatus for removing impurities from water and/or wastewater and a method of washing a filter having a filter bed for filtering water or wastewater. In the most preferred form of the invention, the fluid distribution system is an air scour system for directing air through the filter bed to assist in cleaning of the filter bed to remove impurities trapped in the filter bed during a service run. In the most preferred form, the air scour system includes an adapter for permitting adjustment of at least one component of the air scour system during installation.

Abstract: An assembly with hydrocyclones comprising: multiple hydrocyclones having a net chamber with two side openings positioned on opposite sides of the net chamber and a overflow chamber having two side openings positioned on opposite sides of the overflow chamber. The hydrocyclones are arranged at a support structure, comprising a support bar for support of the hydrocyclones. The hydrocyclones being arranged side by side with their side openings adjacent each other thus forming an inlet pipe by means of the inlet chambers and an overflow pipe by means of the overflow chambers. The inlet chambers and the overflow chambers are adapted to be pressed against each other respectively. The hydrocyclones being arranged in pairs with one of the two hydrocyclones arranged on one side of the support bar and the other on the opposite sides thereof.

Abstract: A desanding system has an elongated vessel that is tilted at a non-zero inclination angle. A fluid inlet at the vessel's upper end discharges a gas stream having entrained liquids and particulates and a fluid outlet into a freeboard portion formed adjacent an upper portion of the vessel above a gas/liquid interface formed below the fluid outlet. A belly storage portion is formed below the interface. The freeboard portion of the vessel has a freeboard cross-sectional area that diminishes along the interface from the fluid inlet to a fluid outlet spaced away from and lower than the fluid inlet. The cross-sectional are of the freeboard portion causes precipitation of the entrained liquids and particulates therefrom and collect in the belly portion of the vessel. A desanded gas stream, being free of a substantial portion of the particulates is removed from the vessel through the fluid outlet.

Abstract: Rake systems for cleaning water streams and new and novel components for such rake systems.

Abstract: The invention relates to a filter assembly for membrane filtration—of liquids, and more in particular a spiral wound filter assembly with improved filtration performance. Provided is a spiral wound filter assembly comprising a permeate channel (5; 305, 325) for transporting permeate to the permeate outlet (12), said permeate channel being provided with at least one flow restriction (13; 113, 120; 213; 333) in form of check or control valves or ridges, for increasing the pressure in at least part of the permeate channel. The invention further relates to an apparatus comprising such a filter assembly, and to methods for using this apparatus.

Abstract: The present invention presents a filtration system with an integrated manifold valve. The filtration system employs only one pivotal component—the pivoting of the manifold. The manifold valve includes a dual aperture design for a two-fold alignment scheme with the ingress and egress lines of the fluid source. The invention is free of multi-component rotary valve with internal, rotatable parts, or an activation component, such as a handle, for initiating the rotary valve, allowing the user to rotate the rotational components thereof. The reduction in moveable components in this design reduces the likelihood of failure and increases the reliability of the filtration system.

Abstract: The invention concerns a device comprising: a base (2); a moveable or removable door (20), said device having a closed door position; and in the closed door position, a circuit (8) comprising a bag comprising two flexible films and conveying network connectors, and a press (9) comprising a first shell (16) disposed on said front face (5) of said base (2) and a second shell (17) disposed in said door (20); said bag being clamped between said first shell (16) and said second shell (17) in a state in which conduits of said network for conveying liquid are formed between said films.

Abstract: A membrane separation unit can include a cartridge, at least one membrane disposed within the cartridge, at least one seal plate, and a sealing ring seated in an outer groove of the seal plate. The at least one seal plate can seal one end of the cartridge. The seal plate can have at least one venting hole that forms a passage between the interior of the cartridge and the outer groove. The sealing ring can have a cross-sectional shape that forms a circular venting path between the sealing ring and the seal plate. The sealing ring can include one or more grooves to allow fluid to vent into an annular space between a device housing and the membrane separation unit. The sealing ring can include an outer surface having, in cross-section, two flattened surfaces that form an angle of between 90° and 175° there between.

Abstract: The invention concerns a device comprising a base (2) and a door (20), said device having a closed door position in which a circuit (8) of the device comprises a bag comprising two flexible films and connectors of the conveying network, and a press (9) comprising a first shell (16) disposed on a front face (5) of said base (2) and a second shell (17) disposed in said door (20); and a hinge system hinging said door (20) relative to said base (2), and disposed only on one side of said door (20) so as to form lateral clearances between said door (20) and said base (2) over the rest of a perimeter of said door (20).

Abstract: A removable device that ensures that the port of a filter cartridge is liquid tightly sealed to the port of the head of a housing even when there is insufficient room beneath the bowl to allow one to physically secure the cartridge port to the head port before securing the head and bowl together. The invention uses one or more removably attached alignment devices to center the cartridge in the bowl and maintain it at a height sufficient to ensure that the two ports are aligned and liquid tightly sealed to each other when the bowl and head are mated together.

Abstract: The invention provides a connector assembly for fastening filter elements onto a supporting plate of a press filter, comprising a first cylindrical core, a first flange extending outward from the first cylindrical core, a second cylindrical core, and a second flange extending outward from the second cylindrical core. The first cylindrical core is shaped and dimensioned such that it snugly passes through and is meshed with a central through hole of the supporting plate, and the second cylindrical core is shaped and dimensioned such that it snugly passes through and is meshed with the first cylindrical core. Both the first cylindrical core and the first flange and both the second cylindrical core and the second flange are respectively moulded integrally from a non-woven fabric which has the ability of self-sustaining and shape maintenance, and is mouldable. The invention also relates to press filter fitted with the connector assembly.

Abstract: A water purifying apparatus and system capable of sedimenting particulates in the fluid over time, and allowing for the quick flushing of sedimented particulates. Top and bottom baffles act as barriers for the sediments, with the bottom barriers having a removable barrier.

Abstract: A fluid treatment device includes a tank containing a fluid treatment medium and a fluid. A distributor plate is received in the tank and separates the bed from a lower end portion of the tank. A baffle is positioned beneath the distributor plate and is configured to direct fluid exiting a riser tube of the fluid treatment device toward the peripheral of the tank to thereby provide a more evenly-distributed flow through the radius of the distributor plate and through the fluid treatment medium. The baffle may have a downwardly facing concave surface that traps air bubbles generated during a brine draw operation.

Abstract: A distributor plate for a resin tank of a fluid treatment device such as a water softener includes a central hub, an outer ring, a plurality of ribs extending between the hub and the ring and dividing the distributor plate into discrete segments, and a slotted plate connected therebetween. The distributor plate separates the resin bed from a lower end of the resin tank. The distributor plate further comprises at least one valve plate coupled to an underside of the distributor plate over at least one segment thereof. The valve plate is constructed from a material configured to float in the fluid being treated and is movable between a raised position during upflow and a lowered position during downflow. In this manner, the valve plate acts like a check valve to regulate the manner in which fluid flows through the distributor plate during upflow and downflow, improving resin scrubbing during upflow.

Abstract: A fluid filter has a filter housing with a first filter housing part that has an installation opening for an exchangeable filter element and is closeable with a second filter housing part. The first filter housing part has a first sealing surface and the second filter housing part has a second sealing surface interacting with the first sealing surface. The filter element has a seal circumferentially and radially extending relative to a filter axis. The seal is arranged between the first and second sealing surfaces when the filter element is correctly installed. The seal has a positioning contour in which a course of the seal at least in one section has an axial directional component relative to the filter axis. The first and second sealing surfaces each have an appropriate positioning counter contour which receive the at least one positioning contour when the filter element is correctly installed.

Abstract: A combined citrus press and zester. The citrus press is of a known type, and includes an upper handle and a lower handle joined at a forward pivot point. The lower handle includes a cup sized to receive a halved citrus fruit, such as a lemon or lime. The upper handle includes a male die which mates with said cup to compress and thus juice the halved fruit. To save material and weight, the male die is formed as relatively constant thickness, which results in a depression on the opposite, outer side of the upper handle. The citrus zester includes a body with a grating blade received or formed therein. The inner side of the body has a collar extending therefrom and surrounding the blade. This collar is sized to be received within the depression formed in the upper handle of the citrus press. The collar may be sized and formed such that the zester may be selectively mounted to the press.

Abstract: A device for interfering with removal of a riser tube from within a water treatment tank. The device includes a collar having a central region dimensioned to fixedly receive the riser tube; and at least one restraining arm extending from the collar away from the central region, wherein the at least one restraining arm is dimensioned to contact an inner wall of the water treatment tank when the riser tube is moved upwards with respect to the treatment tank thereby interfering with removal of the riser tube from the water treatment tank.

Abstract: A method for controlling fouling of a settler vessel overflow system comprises maintaining at least a minimum stream flow in the overflow system by recirculating a portion of the overflow stream. A system for performing the method is also disclosed.

Abstract: A membrane filtration apparatus is provided in which a hollow fiber membrane element 1 including a water collecting cap 20 having a water collecting port and a groove and being engaged liquid-tightly with a bundle of a hollow fiber membrane is engaged with a frame 60 having supporting beams 65 to be fitted in the grooves. The engagement and the rotation of the hollow fiber membrane element 1 is possible merely by inserting the supporting beams 65 into the grooves formed in the water collecting cap 20.

Abstract: Described herein is a structure for a permeate spacer for use in spiral wound osmosis membrane elements, having at least two sets of parallel ribs, wherein the ribs in the first set are oriented at about a 90 degree angle to the ribs in the second set. The permeate spacer is used by sandwiching it inside a membrane envelope or leaf, and is particularly useful for non-pressure-driven processes, such as forward osmosis (FO) and pressure-reduced osmosis (PRO).

Abstract: A parallel flow filter-in-filter design for a filter system is provided. The filter-in-filter design provides two distinctly parallel or independent flow paths within a filter assembly in a single housing or shell. The filter assembly includes a first outer filter element radially spaced apart from a second inner filter element. A centertube and a funnel shaped passageway housed within the centertube are provided in a space between the first outer filter element and the second inner filter element. The centertube and funnel shaped passageway work in tandem to provide two distinct parallel or independent flow paths within the filter assembly. The funnel shaped passageway is provided generally below the second inner filter element within the centertube.

Abstract: A filter housing for a dishwasher is provided, the dishwasher including a sump to store wash water. The filter housing may be coupled to an upper portion of the sump and include a filter coupling portion having a filter coupled thereto to filter out foreign substances contained in wash water overflowing the sump, a peripheral portion arranged outside of the filter coupling portion and provided with at least one recovery hole frame, a recovery hole allowing the wash water to pass therethrough being formed inside the at least one recovery hole frame, and an inclined rib formed at a lower surface of the peripheral portion, the inclined rib being inclined downward.

Abstract: A filter system having a filter media retainer seal includes: at least one underdrain block having a top wall, a bottom wall, and a pair of side walls extending between the top wall and the bottom wall; a filter media retainer mounted onto the top wall of the at least one underdrain block; and at least one rib positioned between the underdrain block and the filter media retainer. The at least one rib forms a seal between the underdrain block and the filter media retainer, and prevents filter media from entering the underdrain block. The at least one rib can be monolithically formed to the at least one underdrain block. Alternatively, the at least one rib is monolithically formed to the filter media retainer. The rib is crushable and/or it bites into a surface on the adjoining part to reduce or eliminate the need for a separate sealant.

Abstract: A biological filtration system includes a reservoir configured to receive an aqueous liquid, a multiplicity of polymeric container closures in the reservoir, a fluid inlet fluidically coupled with the reservoir, and a fluid outlet fluidically coupled with the reservoir. The fluid inlet is configured such that an aqueous liquid provided to the reservoir via the fluid inlet contacts the multiplicity of polymeric container closures. The polymeric container closures support biofilm growth. Treating the aqueous liquid provided to the biological filtration system includes contacting the polymeric container closures with the aqueous liquid, growing biofilm on the polymeric container closures in contact with the aqueous liquid, thereby removing contaminants from the aqueous liquid to yield a treated aqueous liquid, and removing the treated aqueous liquid from the biological filtration system.

Abstract: Described herein are methods and devices for biologically treating water and/or wastewater. The methods and devices for treating wastewater may be enhanced using an surge lifting device which moves water and/or solids using volumes of air (for liquid transfer and mixing) and the automatic sludge return mechanism, combined with alternating aeration on and off operation to achieve comprehensive nitrogen and phosphorus removal. This surge lifting device can provide occasional surges of water using large bubbles which are able to move great volume of liquid while minimizing dissolved oxygen transfer to the surrounding liquid. Use of the devices and processes herein provides a simple, eloquent approach to wastewater treatment with less operation and maintenance costs than conventional devices and/or processes. The same surge lifting device can also be installed in an anaerobic digester, and use the biogas generated below the device to automatically mix the digester, without external energy input.

Abstract: A phase splitter (14) for splitting phases of liquids, the phase splitter (14) characterised by an elongate body (16) having a generally convexly curved liquid-facing face (28) when viewed in transverse cross-section along a longitudinal axis of the elongate body (16).

Abstract: A continuous flow dryer system according to various embodiments can include a source for supplying a material to be treated having a high moisture content, such as a distiller wet grain, a profile screw compression dryer, a profile screw, and a drive coupled to the profile screw for axially rotating the profile screw. The profile screw compression dryer includes an inlet for receiving the material for drying, which is fed therein in a controlled manner. The profile screw is provided within the housing of the dryer. The profile screw has a diameter that increases in dimension in a direction away from the inlet for increasing the compressive force applied to the material to assist with drying as the profile screw rotates and moves the material longitudinally along the profile screw to produce a final product, for example, a distiller dried grain for use as an animal feed.

Abstract: A feedwell for a thickener/clarifier includes a feedwell body (40), a feedwell inlet (41), a sidewall (42), and a discharge opening (48). At least one infeed conduit (21) is connected at an upstream end of the feedwell inlet (41). The sidewall (42) has a non-cylindrical curved peripheral surface defining a radially-outermost fluid boundary surface for an influent stream (60). The non-cylindrical curved peripheral surface may include portions of a volute surface, coil surface, helical surface, compound curve surface, spline curve surface, or spiral surface. Feedwells according to the invention provide a uniform settling tank feeding flux around exiting portions of the feedwell, control velocity gradients and shear rates, protect flocculated aggregates, normalize sedimentation conditions in the settling tank, and prevent large local accelerations and flow non-uniformities.

Abstract: A High Efficiency Treatment System (system) wastewater treatment system including a tank with a multi-chamber tank system that is designed to remove pollutants from domestic wastewater. Embodiments of the system consist of a pretreatment chamber, which is in fluid communication with an anoxic chamber, which is in fluid communication with an aeration chamber, which is in fluid communication with a clarification chamber, and which is in fluid communication with a polishing chamber. The system can be applied to remove suspended solids, BOD, ammonia, nitrate and TKN from wastewater.

Abstract: An endcap bypass plug is disclosed. The endcap bypass plug includes a body and a plurality of leg members. The body includes an upper surface, a lower surface and an outer side surface joining the upper surface to the lower surface. A central axis extends through an axial center of the body. The plurality of leg members are connected to and extends away from the upper surface of the body. Adjacent leg members of the plurality of leg members are spaced apart by a distance to thereby form a plurality of radial passages defining a plurality of radial fluid-flow paths there between. Each leg member of the plurality of leg members includes: a head portion having an upper surface. The head portion includes a nose portion extending radially outwardly from the head portion. The nose portion includes a ramp surface and a lower surface. The ramp surface of the nose portion is connected to the upper surface of the head portion to define an upper edge.

Abstract: A plastic end disk for a filter element has a disk-shaped-section sealing an end face of a star-pleated bellows and has a hollow-cylindrical section extending away from the disk-shaped-section. An inner side of the hollow-cylindrical section radially seals the plastic end disk on a receiving pin by an O-ring. The hollow-cylindrical section has noses arranged on the inner side that extend into the interior the hollow-cylindrical section. The noses house an O-ring. The noses include first noses extending in a first plane parallel to the disk-shaped-section and second noses extending in a second plane that is spaced apart from the first plane in axial direction. The first noses are displaced relative to the second noses such that the first noses, when projected axially onto the second plane, and the second noses do not overlap and an undercut-free configuration of the plastic end disk is provided.

Abstract: A flush plug and a collar are used in installing a drain or cleanout. A flush plug is temporarily attached to the nipple of a cleanout or to a drain base and leveled. Concrete is then poured flush with the top of the flush plug. After the flush plug is removed from the cured concrete, a collar is installed in the hole in the concrete left by the flush plug. The outside of the lower portion of the collar is beveled like the flush plug. The upper portion of the collar includes a sleeve rising above the top surface of the surrounding concrete by an amount equal to the thickness of the specific floor finish. Tile or other finish may then be laid to around the collar. The installed drain will be flush and level with the flooring around it.

Abstract: A filter cartridge structure with a filter cartridge includes a column-shaped main body having an open top, a cavity formed at the middle of the main body and interconnected to the open top, and a joint portion formed at the open top of the main body and combined with an insert. The insert is made of metal, ABS, or any material with physical properties similar to those of ABS to achieve the effects of enhancing the tenacity and impact resisting strength of the joint portion of the filter cartridge effectively, overcoming the problem of the joint portion of the conventional filter cartridge that may be cracked or broken easily, and improving the service life of the filter product.

Abstract: A sub-assembly of a filter assembly is disclosed. The sub-assembly includes an endcap having a substantially cylindrical sidewall including an exterior surface and an interior surface and a housing having a substantially cylindrical sidewall including an exterior surface and an interior surface. The exterior surface forms at least one exterior recessed region. A portion of a length of the substantially cylindrical sidewall of the housing is deformed such that a portion of the interior surface of the substantially cylindrical sidewall of the housing is arranged at least partially within the at least one exterior recessed region formed by the exterior surface of the substantially cylindrical sidewall of the endcap for mechanically-coupling the housing to the endcap. A method is also disclosed.

Abstract: A profiled strip for the installation in honeycomb-like separator packages and a honeycomb-like separator package formed by a plurality of profiled strips are described. The profiled strip has two long base sides and two connection sides. It is distinguished by the fact that a single groove connection portion is respectively arranged at the free ends of the connection sides and a single tongue connection portion is respectively arranged at the ends of the base sides that abut the connection sides, or vice versa. By this, corresponding separator packages can be assembled very simple.

Abstract: The hollow fiber membrane module has a hollow fiber membrane bundle composed of a plurality of hollow fiber membranes with an adsorption function, a housing that houses the hollow fiber membrane bundle, and partition members that partition the hollow fiber membrane bundle into a plurality of small bundles at an end of the hollow fiber membrane bundle, the partition members having penetrating sections that penetrate in the lengthwise direction of the hollow fiber membranes. The volume fill factor of the hollow fiber membranes is at least 30% and less than 70%. This can secure throughput capacity for the hollow fiber membrane module, while maintaining consistent adsorption capacity per unit membrane volume, thus ensuring high scalability.

Abstract: A filter or clarification system for removing impurities from a liquid to be treated, i.e., influent. The system preferably includes a chamber for receiving a liquid to be treated. The chamber has a settling assembly including a plurality of inclined settling members forming a plurality of inclined liquid passageways through which the liquid to be treated is directed to remove impurities from the liquid to be treated. Preferably, the headloss of the settling assembly is solely controlled by one or more orifices formed in the settling members, i.e., the settling assembly is free of gaps formed between the settling members that appreciably affect the headloss of the settling system. Support members are provided for each of the settling members to allow the settling members to be easily and readily removed. Preferably, the support members provide sufficient stability to allow an individual to walk on the tops of the settling members.

Abstract: The present invention relates to extracorporeal blood treatment devices and methods and devices for conserving extracorporeal blood treatment devices. In accordance with the present invention, an antifreeze agent in introduced only into that part of the dialysis liquid system of the blood treatment device that includes the volume lying upstream of a sterile filter with which sterile substituate is recovered from the dialysis liquid. Accordingly, that part of the dialysis liquid system that includes the volume lying downstream of the sterile filter is not filled with an antifreeze agent. The present invention makes it possible, after removal of the sterile filter, to easily and safely separate a substituate segment from the rest of the dialysis liquid system and drain off liquid located in the substituate segment.

Abstract: A housing for a filter element includes a fluid inlet and a deflector arrangement leading the fluid to be filtered towards the filter element. The invention further relates to a filter including a housing; a filter element arranged within the housing and dividing the space inside the housing into a first and second chamber, the inlet in communication with the first chamber. Pressure loss is advantageously reduced due to the deflector arrangement Meanwhile, by distributing the deflecting parts of said deflector arrangement evenly, the uniformity of velocity at the surface of filter element is also improved, while the occurrence of inefficiency of filtration or the like decreases.

Abstract: Provided are a connection member capable of preventing leakage from a supply side to a permeating side from occurring by a simple means; and a separation membrane module using the connection member. The connection member (20) is used to connect in series a plurality of separation membrane elements equipped with end surface holding members (36) and to install the separation membrane elements in a pressure-resistant vessel (38). The connection member (20) is characterized in that, when the separation membrane elements are connected to each other, the connection member is engaged with respective grooves (36b) of the end surface holding members (36) adjacent to each other.

Abstract: A cover arrangement is provided for a launder channel of a clarifier tank. The cover arrangement includes at least one mounting section coupled to the clarifier tank near the launder channel. A plurality of cover panel members are provided, each panel member having a surface and two stiffening flanges located on opposing lateral edges of the surface, where each of the cover panel members further includes a light seal either one of attached to or attached near one of the stiffening flanges. The cover arrangement includes arranging the plurality of cover panels around the clarifier tank over the launder channel such that the light seal attached to or near the outer surface of the stiffening flange of a first panel member among the plurality of panel members abuts against a stiffening flange of an adjacent second panel member among the plurality of panel members.

Abstract: A filter cartridge includes a housing, a lid, a filter element and a positioning cylinder. The lid is provided for covering an opening of the housing. The filter element is disposed in the housing. The positioning cylinder together with the filter element is disposed in the housing and defining a passageway for reception of the filter element. Further, the positioning cylinder includes a plurality of bulging portions disposed about the passageway and each protruding toward a centerline axis of the passageway. The bulging portions of the positioning cylinder have their highest points equally spaced apart from the centerline axis of the passageway.

Abstract: The invention is a water submersible device that dislodges filament algae or detritus from infected objects such as rocks and disposes the matters into a removable compartment for removal from the aquarium or pond. It has a water pump (1) that not only sucks in water from its water inlet (2) opening but also has a drill bit (3) extending out from the center of the same inlet opening. When it makes contact with the filament algae or detritus on objects, it breaks and swirls them up quickly and disposes them to the water outlet side of the pump. There, contains a collection cup (5) with filter materials (4) for easy matters disposal. The pump is secured onto a rod (7) by a hinge joint (6) for easy angle adjustment by the user holding the handle (8) above water. It is powered by a battery (9) inside the handle.