Pleated filtration media, media packs, filter elements, and methods for filtering fluid are provided which contain three dimensional flutes in the media surface, the flutes configured to improve filter performance. In certain embodiments the flutes have defined peaks that reduce masking between adjacent pleats, the flutes have ridges along their length to modify flute cross sectional geometry, and/or the flutes provide for volume asymmetry across the media.

A method and system for treating oilfield produced water is disclosed. The method includes passing oilfield produced water through a chain of filters, first filter configured to filter particles of a size larger than 10 m from the water, a second filter configured to filter remaining particles of a size larger than 2 m from the water and a third filter configured to filter remaining particles of a size larger than 0.5 m from the water and automatically cleaning at least one of the filters.

A method and system for treating oilfield produced water is disclosed. The method includes passing oilfield produced water through a chain of filters, first filter configured to filter particles of a size larger than 10 m from the water, a second filter configured to filter remaining particles of a size larger than 2 m from the water and a third filter configured to filter remaining particles of a size larger than 0.5 m from the water and automatically cleaning at least one of the filters.

The present invention supplies partitioned water treatment systems that possess a plurality of chambers and vertical filtration units, and are operative to control and filter surface runoff water. Such systems are typically placed inline with surface runoff water conveyance system infrastructure, such as pipes, channels, and water storage units.

A filtration device for filtering cooking oil is provided. The filtration device may include a hub and one or more filtration units having a central aperture to coupleably receive the hub. Each of the one or more filtration units may include a first upper filter sheet including a water insoluble or partially water insoluble material or combination of materials that convert or at least partially convert free fatty acid in the cooking oil to soap and a second upper filter sheet arranged adjacent to the first upper filter sheet and coupled thereto. The second upper filter sheet can include a material or combination of materials that remove or at least partially remove the soap from the cooking oil to produce filtered cooking oil. The one or more filtration units can be in fluid communication with the hub through which filtered cooking oil may be removed from the filtration device.

A filtration device for filtering cooking oil is provided. The filtration device may include a hub and one or more filtration units having a central aperture to coupleably receive the hub. Each of the one or more filtration units may include a first upper filter sheet including a water insoluble or partially water insoluble material or combination of materials that convert or at least partially convert free fatty acid in the cooking oil to soap and a second upper filter sheet arranged adjacent to the first upper filter sheet and coupled thereto. The second upper filter sheet can include a material or combination of materials that remove or at least partially remove the soap from the cooking oil to produce filtered cooking oil. The one or more filtration units can be in fluid communication with the hub through which filtered cooking oil may be removed from the filtration device.

The present disclosure provides a filter and a method of forming the filter which includes two layers of filtering media and outer plastic ribs that form a flat structure. When the ribs are moved towards each other, the two layers of filtration media are separated apart to form a cylindrical filtration structure for mounting to a connecting unit.

The present invention supplies partitioned water treatment systems that possess a plurality of chambers and vertical filtration units, and are operative to control and filter surface runoff water. Such systems are typically placed inline with surface runoff water conveyance system infrastructure, such as pipes, channels, and water storage units.

This disclosure relates generally to a filter media that can be used to filter a spa, hot tub, or pool. The filter media can include a body with a top surface, a bottom surface, and a plurality of pleats. A border is joined and surrounding a periphery of the body, the border for maintaining a planar shape of one or more of the top surface and bottom surface of the filter media.

A screen for intake of fluid. The screen includes parallel and spaced rods, filtration material, a fitting, and structural members. The rods may be distributed in a cylindrical configuration. The filtration material, in some embodiments spirally wrapped wire, is disposed around the rods to define an interior volume. The fitting is disposed at an end of the rods and adjacent to the filtration material. Each structural member, which in some embodiments are elongated bars, is interposed between adjacent rods. The structural members are welded to the adjacent rods, and the adjacent rods and the structural members are welded to the fitting to increase the effective weld area, the tensile strength of the connection, and potentially the overall strength of the screen. The screen may be used for a variety of fluids and installations, and is particularly suited to use in water wells.