The present invention discloses a filtering device used for removing impurities in a mixture of biological diatomite, which relates to the technical field of sewage treatment. This device includes a plurality of deflectors evenly distributed in multiple layers in the vertical direction. Each deflector includes a shell and a top plate. There is a filter unit symmetrically arranged on the left and right sides of each deflector. The top of the shell is covered with a top plate hinged with the depressed plate. The bottom of the shell is provided with water inlets which communicate with the shunt pipe, and the upper parts of the left and right side walls of the shell are provided with overflow ports. The shell also has a plurality of diversion folding plates located below the overflow ports and vertically staggered and distributed on the left and right side walls. The filter unit includes an inclined water guiding groove and a filtering plate.

Disclosed is a disposable filter capsule apparatus that incorporates integral quick connect components and check valves to facilitate assembly to, and dis-assembly from, larger assemblies and apparatus. The quick connect elements and valves are configured to eliminate the need for auxiliary sealing elements, e.g., o-rings and valve springs so as to prevent unwanted reactions with fluids and/or gases flowing through the capsules, and to further prevent the disposal of expensive re-usable elements in the disposable capsules.

Methods and apparatuses for screening are provided. Embodiments include a screen basket apparatus for screening material, comprising a grid frame having a plurality of openings arranged in a lattice and a plurality of screening cartridge assemblies affixed to the grid frame to cover the respective openings of the grid frame. The screening cartridge assembly includes a case and a screen assembly fitted into the case, and may be affixed to a set of transversal member of the grid frame. The case may be formed of a single injection molded piece integrally formed by injection molding one of a polyurethane or a thermoset polymer. The screening elements together form a generally continuous screening surface across the exterior of the grid frame, which reduces blinding and is resistant to wear and tear.

A drain filter assembly includes a screen filter that is configured to be installed at a drain and that is configured to block foreign substances in liquid while the liquid passes therethrough. The screen filter includes: a plurality of filter holes configured to allow passage of the liquid into the drain, where each of the plurality of filter holes has a pore size that is less than sizes of the foreign substances; and an air communication hole configured to allow passage of air the liquid passes through the plurality of filter holes. A diameter of the air communication hole is greater than the pore size of each of the plurality of filter holes.

A liquid (2), such as wastewater, is filtered using a liquid-permeable filtering element (9) having first and second faces (10, 11) so as to produce filtered liquid (4) having total suspended solids of no more than 10 mg/L. The method comprises cycling the liquid-permeable filtering element through the liquid whereby, in a first position, an area of the first face of the filtering element is subjected to liquid under pressure and a pressure across the filtering element is greater than 0 and less than or equal to 5.9 kPa (60 cmH2O), and, in a second position, the area is not subjected to liquid under pressure or is subjected to liquid at a lower pressure, and solids accumulated on the first face of the filtering element can be removed by directing at least one jet at the second face of the filtering element through the filtering element towards the first face.

Described are ion-exchange membranes that include a porous polymeric membrane and imidazole ion-exchange groups at surfaces of the membrane; ion-exchange membranes and filters that contain the ion-exchange membranes; and methods of using the ion-exchange membranes and filters for separating charged biological molecule from a liquid.

In one aspect, a material structure is disclosed, which includes a macroscopic porous substrate configured to receive a flow of a medium for passage of at least a portion thereof through the porous substrate. At least one porous coating is disposed on at least a portion of an inner surface of the porous substrate, wherein the porous coating comprises a matrix having a plurality of interconnected passages. The porous substrate and the coating are configured to treat at least one contaminant, if any, present in the flowing medium.

The present invention relates to a filter device for separating debris from a fluid. The filter device includes a housing having at least one inlet, at least one first outlet, and a second outlet. The filter device further includes a filter cartridge that allows fluid to pass therethrough but prevents passage of debris therethrough. The filter cartridge is positioned within the housing so as to define an upper chamber and a lower chamber within the housing. The at least one inlet is positioned so as to allow contaminated fluid to enter the lower chamber of the housing. Fluid must pass through the filter cartridge in an upward direction to reach the upper chamber, and the first outlet is positioned so as to allow filtered fluid to exit the upper chamber. The second outlet is positioned to allow debris accumulated within the lower chamber to be discharged.

A straining apparatus is provided for installation on a container, the container having a cavity and a rim. The straining apparatus includes a body portion defining a volume, the body portion made of a screen material configured for insertion into the cavity. A collar portion defines an opening to the body portion and is configured to fold over the rim when the body portion is disposed in the cavity. A closure mechanism is coupled to the collar portion. The closure mechanism is configured to face away from the container when the collar portion is folded over the rim, thereby allowing convenient access to the collar portion. The closure mechanism is lockably adjustable and configured such that it holds the collar portion against the container in a predetermined position below the rim.

A filter element for a filter unit for filtering a fluid may include a filter element body. The filter element body may include at least one structural body and a support body. The structural body may have a filter structure which is permeable for the fluid. The filter structure may have a plurality of meshes/pores. The filter structure may be structured as a three-dimensionally interlinked lattice structure having a repeating regularity. The plurality of meshes/pores may be formed as a plurality of clear spaces by a plurality of lattice rods that are securely connected to one another. The support body may include a support structure that is permeable for the fluid. The structural body and the support body may each be produced via a 3D printing method. The structural body and the support body may be 3D printed from at least one of various materials and material compositions.