Abstract: The present technology relates generally to fluid filtration systems. In particular, several embodiments are directed toward compartmentally expandable rotating belt filters and associated systems and methods. In some embodiments, for example, a filtering system for contaminated fluid includes a first fluid filtering chamber having a first filter belt movably positioned therein and a second fluid filtering chamber having a second filter belt movably positioned therein. The first filter belt can be operable in parallel with the second filter belt. The system can further include a sensor configured to sense a condition related a volume of the contaminated fluid, a speed of flow of the contaminated fluid, or a level of contaminants in the contaminated fluid. A controller can be configured to initiate, stop, or adjust fluid flow to the first fluid filtering chamber and second fluid filtering chamber individually in response to the sensed condition.

Abstract: A portable hemodialysis system is provided including a disposable cartridge and a reused dialysis machine. The disposable cartridge includes a dialysate flow path and a blood flow path which flow in opposite directions through a dialyzer. The disposable cartridge includes a filter for removing waste products from the dialysate, and pressure and fluid flow sensors for measuring the pressure and fluid flow in the dialysate flow path and blood flow path. Preferably, the filter has a vapor membrane for releasing gases including ammonia, but not liquids such as the dialysate. The reused dialysis machine possesses a reservoir for dialysate, an ammonia sensor adjacent to the vapor membrane, a level sensor, a blood leak sensor, a venous blood line pressure sensor, a venous blood line bubble detector, pump motors, and a processor connected to the motors and sensors for controlling and monitoring hemodialysis treatment.

Abstract: An expandable water filtering pitcher having a pitcher with a top portion, a base portion and an inner wall surface defining an internal volume of the pitcher, a spout at the top portion at a pitcher opening, a handle attached to an exterior of the pitcher, a filter adapter mounted within the pitcher top portion. The filter adapter is within a reservoir comprising an opening therethrough from the top portion to the base portion of the pitcher and a reservoir sleeve movably coupled to the reservoir and top portion, at least one of the reservoir and the reservoir sleeve moveable in relation to the other between a retracted position defining a first reservoir volume within the reservoir and reservoir sleeve, and an expanded position defining a second reservoir volume within the reservoir and reservoir sleeve at least 40% larger than the first reservoir volume.

Abstract: An air filter element for an air filter may include a first end plate and a second end plate spaced apart from each other in an axial direction and configured to bound the filter element in the axial direction. The first filter body may be arranged axially between the first and second end plates. A second filter body may be arranged axially between the first and second end plates. An intermediate plate may be arranged axially between the first and second filter bodies and have an intermediate plate area enclosed by an intermediate outer contour and a first end plate area enclosed by a first outer contour.

Abstract: An air filter device is provided with a filter housing and a filter element arranged in the filter housing. A frame part is connected to the filter element and frames the filter element at least over sections thereof circumferentially. The frame part is provided with an air duct receptacle that is adapted to receive an air duct. The frame part is arranged at least partially on an exterior side of the filter housing. The filter element is fastened by the frame part on the filter housing.

Abstract: An expandable water filtering pitcher having a pitcher with a top portion, a base portion and an inner wall surface defining an internal volume of the pitcher, a spout at the top portion at a pitcher opening, a handle attached to an exterior of the pitcher, a filter adapter mounted within the pitcher top portion. The filter adapter is within a reservoir comprising an opening therethrough from the top portion to the base portion of the pitcher and a reservoir sleeve movably coupled to the reservoir and top portion, at least one of the reservoir and the reservoir sleeve moveable in relation to the other between a retracted position defining a first reservoir volume within the reservoir and reservoir sleeve, and an expanded position defining a second reservoir volume within the reservoir and reservoir sleeve at least 40% larger than the first reservoir volume.

Abstract: A method to determine a type of blood circuit attached to an extracorporeal blood treatment console including: pumping a liquid through a blood passage of the blood circuit, sensing a first pressure in: the blood passage while the passage is closed and pumping stopped, pumping an additional amount of the liquid into the blood passage while the blood passage is and remains closed and thereafter sensing a second pressure, and determine a dimensional characteristic of a fluid passage in the blood passage based on the additional amount of the liquid and the second pressure.

Abstract: A filter element (10) comprises filter bellows (16), in particular open filter bellows made of a filter medium (18), which has an oncoming flow side (28) and an outgoing flow side (30) for the fluid to be filtered. The filter element (10) is disposed in the filter housing (11) in such a way that it separates at least one inlet (15) from at least one outlet (17). An element axis (14) of the filter element (10) and a housing axis (25) of the filter housing (11) may be aligned in parallel with or axially to the installation direction (12) in the filter housing (11) for installing the filter element (10). The filter element (10) has at least one outer support section (38), which protrudes axially beyond the filter bellows (16) on the oncoming flow side (28) or the outgoing flow side (30) with respect to the element axis (14) and protrudes into an axial projection of the oncoming flow side (28) or the outgoing flow side (30) with respect to the element axis (14).

Abstract: A wicking apparatus includes a composite condenser membrane comprising a substrate layer, a vapor inlet end, a liquid discharge end, a plurality of cavities disposed in the substrate layer fluidly coupling the vapor inlet end to the liquid discharge end, and a nanoporous filler material disposed within the plurality of cavities. The nanoporous filler material has a first plurality of open pores with a maximum diameter in the range of 0.2 to 200 nanometers. The first end of the liquid conduit is fluidly coupled to the liquid discharge end of the composite condenser membrane. The wicking apparatus further includes a wick composite evaporator membrane comprising a substrate layer, a liquid inlet end, a vapor discharge end, a plurality of cavities disposed in the substrate layer fluidly coupling the liquid inlet end to the second end of the liquid conduit, and a nanoporous filler material disposed within the plurality of cavities.

Abstract: A storm water catch basin hazardous liquid valve that is automatically responsive to the presence of hazardous liquids in storm water run-off, the valve utilizing a hydrophobic barrier member to separate hazardous liquids from water. Collection of a sufficient amount of hazardous liquids across the hydrophobic barrier member initiates a float release member to seal off the catch basin. In the neutral or non-activated status, the storm water run-off enters the catch basin, passes through the valve assembly and out through the storm water conduit system in normal manner. When a hazardous liquid, such as oil, gasoline, chemicals, etc., is present in the storm water run-off above a threshold amount, the valve activates to close off the catch basin such that the storm water run-off is precluded from entering the storm water conduit system.

Abstract: A filter element has a multi-layered filter medium web with several layers that is folded along folding lines. The filter medium web has at least one functional region in at least one section located between adjacent folding lines. The at least one functional region is a first embossment. The layers of the filter medium web are firmly bonded to each other along the first embossment. A device for folding a multi-layered filter medium web has an energy-introducing embossing unit that embosses the filter medium web fed by a feed unit to the embossing unit. A folding unit for folding the filter medium web along folding lines is provided. The energy-introducing embossing unit embosses and firmly bonds the layers of the filter medium web along at least one functional region in at least one section of the filter medium web located between adjacent folding lines.

Abstract: Embodiments of the present invention provide systems and methods for purifying produced water, comprising a closed loop cation exchange unit, a closed loop anion exchange unit, and an intermediate degasifier.

Abstract: An expandable water filtering pitcher having a pitcher with a top portion, a base portion and an inner wall surface defining an internal volume of the pitcher, a spout at the top portion at a pitcher opening, a handle attached to an exterior of the pitcher, a filter adapter mounted within the pitcher top portion. The filter adapter is within a reservoir comprising an opening therethrough from the top portion to the base portion of the pitcher and a reservoir sleeve movably coupled to the reservoir and top portion, at least one of the reservoir and the reservoir sleeve moveable in relation to the other between a refracted position defining a first reservoir volume within the reservoir and reservoir sleeve, and an expanded position defining a second reservoir volume within the reservoir and reservoir sleeve at least 40% larger than the first reservoir volume.

Abstract: A water-treatment separating membrane includes a polyamide active layer formed on999 a porous support. The ratio of a maximum value with respect to a minimum value of a ratio of a peak height of a C?O double bond of a carboxyl group (—COOH) with respect to a peak height of a C?O double bond combined with an amide group (—CONH—) is from 1.2 to 4, when measured after acid treating the polyamide active layer and by using a Fourier transform infrared spectrometer (FTIR).

Abstract: A device (1) for purification of water driven by gravity through a purification unit between an upper dirt water container (2) and a lower clean water tank (3). A backwash system may be integrated, the system comprising a receptacle (8) for accumulation of the backwash water to prevent consumption thereof by mistake.

Abstract: A water-treatment separating membrane includes a polyamide active layer formed on a porous support. When the polyamide active layer is dyed using a 5% aqueous solution of Rhodamine B, at least a curve pattern formed by connecting two or more arcs is formed in at least a partial area of the polyamide active layer.

Abstract: In at least one embodiment, a filter device for filtering out of solid substance from a solid-liquid-mixture where the filter device includes a bearing shaft; a rotation body attached to the bearing shaft and supported by the bearing shaft to be rotatable; a single filter cell formed on the rotation body with a filter structure attached to the rotation body for filtering out the solid substance and a connection channel formed in the rotation body that extends from a filter structure outlet side to an outlet opening formed adjacent to the bearing shaft and via which the connection channel is permanently connected with an intermediate connection channel formed in the bearing shaft; a liquid discharge line connected with or formed by the intermediate connection channel; a plurality of branch-off lines which are branched-off from the liquid discharge line; and a control device having a valve assembly.

Abstract: A sludge protector canopy baffle system for use in a clarifier tank with a tank bottom, and peripheral vertical wall bounding the interior of the tank is formed by a plurality of individual perforated baffles interconnected and supported by other components of the tank forming a rigid ceiling of sloped and curved perforated baffles allowing the incoming water to pass on its surface minimizing sludge re-suspension and directing the flow on top of the blanket in the settling zone of the tank. Each baffle has a curved surface in the lateral direction to allow drainage of solids and openings to allow gas release and water flow. The baffles are interconnected along the length by cross connectors to ensure rigidity. The resulting system provides a sludge protector canopy baffle system by which the water flows uniformly through the tank without disturbing or re-suspending settled or thickened sludge and overall tank performance is enhanced.

Abstract: A fryer apparatus includes a cooking chamber, at least one heating element in the cooking chamber, a filter pan that filters cooking medium from the cooking chamber, a drain valve that controls flow of cooking medium from the cooking chamber, and a filter pump that pumps filtered cooking medium from the filter pan to the cooking chamber. Inlet orifices are disposed in the cooking chamber, and selectively eject filtered cooking medium into the cooking chamber. A controller controls the drain valve to adjust the rate of flow from the cooking chamber, and selectively activates at least inlet orifice of the plurality of inlet orifices to eject filtered cooking medium into the cooking chamber. The controller is configured to control the drain valve and the selective activation of the at least one inlet orifice to maintain a substantially constant level of cooking medium in the cooking chamber throughout a filtering operation.

Abstract: The present invention relates to an apparatus and a method for filtering liquid products. The apparatus includes a filtration bell provided with filtering device and connected to an inflow circuit and a first outlet circuit of the retentate, and to a second outlet circuit of the filtered liquid. The apparatus can include a monitoring and control unit, a first and second sensing device suitable for detecting the value of a first pressure PT1 in the first outlet circuit and of a second pressure PT2 in the second outlet circuit, a flow rate detection device that detects the value of a first flow rate FIT in the second outlet circuit, and value device arranged in the second circuit downstream of the second sensing device. The monitoring and control unit includes a device to control the closure of the valve device and to start a process of backwashing the filtering device.