Abstract: A filter for use with a fuel system having contaminants has a plurality of apices and a plurality of ridges, where each ridge attaches an apex to an adjacent apex. A plurality of ridges and adjoining apices define a first opening that is in register with a second opening wherein the second opening has less surface area than the first opening. A side attaches the first opening and the second opening and tapers inwardly from the first opening to the second opening to minimize stagnant areas along the ridges and apices.

Abstract: A liquid or water treatment apparatus comprising one or both of an electrodialysis cell and a cavitation unit. The cavitation unit generates cavitation in the liquid by flow of the liquid into a constriction where cavitation bubbles are formed and then to an outlet where cavitation bubbles implode, and the constriction includes an aperture formed by walls which are long and narrowly spaced in a plane normal to the flow direction. The electrodialysis cell is arranged with an inlet flow path for directing only part of a quantity of water to be treated through the electrodialysis cell, and an outlet flow path for returning a product of the electrodialysis cell to the remainder of the water.

Abstract: A filtering device, allowing to provide an effective filtering without either requiring particular efforts to the user or imposing him or her to operate in excessively hard positions, comprises a filtering element comprised between a first and a second supporting surface, the distance between the supporting surfaces being adjustable, so as to compress the filtering element by moving the supporting surfaces the nearer the other, and actuating device apt to modify the distance of the supporting surfaces. The actuating device is selectively connectable to a surface of the supporting surfaces in a such way that the actuating device can alternatively move unrelated to motion of the surfaces so as to be placed in an operative configuration or move integral to the surface so as to modify the distance between the surfaces in order to compress the filtering element.

Abstract: A method and device for the cleaning of spiral wound membranes. In the device two or more spiral wound membranes are included in series in pressure tubes. The membranes are cleaned by longitudinal rinsing with water, in which a well-dissolvable gas has been dissolved. In the device for the purification of an aqueous fluid with spiral wound membranes, the membranes can be longitudinal rinsed with water, in which a well-dissolvable gas has been dissolved. As gas that is well-dissolvable preferably CO2 gas or a mixture of gasses is used.

Abstract: A filter including a housing for receiving a filter medium and a filter medium received therein. In a lower region of the filter there is a discharge opening for discharging liquid from the filter. A spacer serves to form a collecting chamber for liquid and defines the liquid collecting chamber. The spacer is provided with webs which lead to an eye, and the eye has liquid channels.

Abstract: The present technology provides for a microfluidic substrate configured to carry out PCR on a number of polynucleotide-containing samples in parallel. The substrate can be a single-layer substrate in a microfluidic cartridge. Also provided are a method of making a microfluidic cartridge comprising such a substrate. Still further disclosed are a microfluidic valve suitable for use in isolating a PCR chamber in a microfluidic substrate, and a method of making such a valve.

Abstract: Filtration media including at least one layer of nanofibers having average diameters less than 1000 nanometers with optional scrim layer(s) are disclosed for filtering particulate matter in liquid. The media achieve flow rates of at least 0.055 L/min/cm2 at relatively high levels of solidity. The media have also advantageously been found to have non-diminishing flow rates as differential pressures increase between 2 psi (14 kPa) and 15 psi (100 kPa).

Abstract: The present disclosure generally relates to injection molded thermoplastic single filter media layer and multi-filter media layer filter cartridges that include a novel arrangement of structural features to improve both the quality of the manufacturing process and the integrity of the filter media layer seal and more particularly to a process for manufacturing both single filter media layer and multi-filter media layer filter cartridges and to the single filter media layer and the multi-filter media layer filter cartridges produced thereby and even more particularly to a process for manufacturing a multi-filter media layer filter cartridge without cracking the upper most filter media layer or any filter media layer during the compressing of at least two porous filter media layers between an inlet and an outlet while insuring an effective seal and the multi-filter media layer filter cartridges produced thereby and, yet, more particularly, to single filter media layer and the multi-filter media layer filter car

Abstract: According to one aspect of the present invention, there is provided a desalination system comprising a plurality of elongated pressure vessels (PV). Each PV has a longitudinal axis, oriented such that the longitudinal axis thereof is of a vertical orientation. Each of the PVs is adapted to receive therein a plurality n of desalination membranes. The membranes located above the lowermost membrane within the PV have a total weight allowing them to function as a mechanism limiting axial expansion of the lowermost membrane, whereby the PV is free of any additional limiting mechanism.

Abstract: A method for treating water includes directing the water to a ballasted flocculation system and mixing a coagulant, flocculant and a ballast with the water. Solids are separated from a clarified effluent at a speed greater than 15 m/h. The method further includes filtering the clarified effluent with one or more microfiltration membranes or ultrafiltration membranes to produce filtered water. Thereafter directing the filtered water to an RO unit or a nanofiltration membrane or membranes and subjecting the filtered water to filtration by the RO unit or the nanofiltration membrane or membranes.

Abstract: A device is provided for receiving a fluid sample. The device includes a fitment having a cavity formed therein. The cavity is provided under vacuum. The fitment also includes a port having a seal. The port is configured to provide fluid connection from an exterior surface of the fitment to the cavity upon opening of the seal. The device optionally includes a collapsible compartment coupled to the fitment and in fluid communication with the cavity.

Abstract: A filter medium includes at least one filter membrane (10) having a fabric ply (12) as a supporting and protective layer. At least one additional filter membrane (14) with another fabric ply (16) as a supporting and protective layer is also provided. A third fabric ply (18) extends between both adjacent filter membranes (10, 14). Both adjacent filter membranes (10, 14) are connected together by the threads (26) of the other two plies (12, 16) which reach through to the third ply (18).

Abstract: A solid-phase extraction device utilizing a section of expanded polytetrafluoroethylene (ePTFE) tubing as the stationary phase is disclosed. The microscopic pores of ePTFE tubing are impregnated with a binding agent having an affinity for a target constituent within a matrix. The matrix is prepared and loaded onto the stationary phase of the system. The target constituent is retained by the stationary phase. The constituent is stripped from the stationary phase with a stripping solution, and collected for further analysis or use.

Abstract: A solid-phase extraction device utilizing a section of expanded polytetrafluoroethylene (ePTFE) tubing as the stationary phase is disclosed. The microscopic pores of ePTFE tubing are impregnated with a binding agent having an affinity for a target constituent within a matrix. The matrix is prepared and loaded onto the stationary phase of the system. The target constituent is retained by the stationary phase. The constituent is stripped from the stationary phase with a stripping solution, and collected for further analysis or use.

Abstract: An immersed membrane system or process may use measured or calculated process information to optimize one or more process operating parameters to improve performance or reduce operating costs. An on-line process control system or method may use the resistance in series method in operating an immersed membrane water treatment system. A process control system or process may consider resistance values and adjust operational parameters such as membrane aeration frequency factor, membrane aeration flow, permeate flux, permeation duration, backwash flow and duration, relaxation duration or maintenance or recovery chemical cleaning frequencies in order to reduce the operational costs related to membrane fouling removal.

Abstract: The invention relates to a filter element consisting of a molded body of porous concrete, which element is arranged in the water stream of a purification system. In particular, the filter element (10) is a molded pervious concrete layer arranged as a partition between a lower compartment (9) and an upper compartment (11) of a treatment chamber (8), wherein the water inlet (12) opens into the lower compartment (9) and a water outlet (17) issues from the upper compartment (11). The pervious concrete filter layer may contain one or more additives to enhance adsorption of pollutants, such as heavy metal ions, phosphorous, hydrocarbons or other target soluble pollutants.

Abstract: A method for membrane fluid filtration and remediation is described herein. The method can include flowing a slurry into a scalping shaker and separating a first particulate from the slurry, forming a first effluent. Free oil can be removed from the first effluent using a first weir, forming a cleaned effluent that can be discharged using a second weir. The cleaned effluent can flow through an absorbent material disposed over a circulation tank for removing more free oil from the cleaned effluent, forming a circulation effluent. A sludge can settle from the circulation effluent within the circulation tank, forming a cleaned circulation stream. The cleaned circulation stream can flow through an ultra-filtration membrane which can separate the cleaned circulation stream, forming a clean permeate and a dirty concentrate. The dirty concentrate can flow back to the circulation tank for further processing.

Abstract: A filter device for the insertion of filter elements (28) to be positioned in a filter housing (10) having a filter inlet (20) and a filter outlet (22) for the fluid to be filtered. The filter elements (28) are traversed in both directions for filtration or backwashing. Certain filter elements (28) perform the filtration in a filtration position and at least one additional filter element (28) can be backwashed in a backwashing position to clean its active filtration surface. As the individual filter elements (28) are brought into the backwashing position and are then returned to their filtration position in succession by a pivoting device (30), the filter elements are individually displaced into the backwashing position in a temporal sequence, in contrast to prior art, where an arm-type backwashing device is pivoted towards the individual filter elements to carry out the backwashing process.

Abstract: A method for fabricating a reverse osmosis membrane is described. The method includes aligning a plurality of carbon nanotubes at the interface of two liquids, the first liquid being an aqueous layer, and the second layer being an organic layer that is immiscible to the aqueous layer, forming a thin layer selective membrane around the aligned carbon nanotubes at the interface of the two liquids, and bonding the thin layer selective membrane/carbon nanotube composite onto a structural support layer.

Abstract: A method of backwashing a membrane filtration module (4), said module (4) including one or more membranes (5) located in a feed-containing vessel (3), the membranes (5) having a permeable wall which is subjected to a filtration operation wherein feed containing contaminant matter is applied to one side of the membrane wall and filtrate is withdrawn from the other side of the membrane wall, the method including: removing liquid from the feed-containing vessel (3) until the level of liquid in the feed-containing vessel (3) falls to a first level (L2) below an upper level of the membranes; suspending the filtration operation; performing a liquid backwash of the membrane wall until liquid level within the feed-containing vessel (3) rises to a second predetermined level (L1) above said first level; aerating the membrane surface with gas bubbles to dislodge fouling materials therefrom; performing a sweep or drain down of the feed-containing vessel (3) to remove the liquid containing the dislodged contaminant matter