A lateral filter, a method of its use, and a system incorporating at least one lateral filter are provided. The lateral filter includes a filter screen that includes a screen wire and screen support rod comprise a non-metallic material and are a unitary, integrated, inseparable, and singular component. In using the lateral filter, a fluid entrained with solids is introduced through an exterior-facing side and permeate forms in the interior of the filter. The solids remaining in the permeate, if any, have a smallest dimension that is less than a width of a slot in the filter screen. The permeate passes from the interior of the lateral filter. Lateral filters may be incorporated into a system comprising many lateral filter, such as sand filter is configured to filter raw seawater.

The invention provides novel slot tube screen material for filtering applications, in particular for separating solid particles from liquids. The slot tube filter screens manufactured according to the invention feature very small slot openings, which are narrowed with respect to a slot opening dimension of conventionally fabricated slot filter tubes. The slot tube construction of the invention comprises a torsion-rotation deformed structure of normally axially orientated parallel support members of the slot tube mantle, which further comprises spiral windings of profile wire around said support members, whereby at each contact crossing a solid weld connection fixes a crossing profile wire to a support member. The plastically twisted slot tube structure displays a helical distortion of the axial support ribs inside the slot tube. As a consequence the filter slot openings between adjoining windings of profile wire are markedly narrowed (versus undeformed slot tube), which offers the possibility of reliably achieving very small filter slot openings of less than 0.020 mm in slot tube filters or screens.

The invention provides novel slot tube screen material for filtering applications, in particular for separating solid particles from liquids. The slot tube filter screens manufactured according to the invention feature very small slot openings, which are narrowed with respect to a slot opening dimension of conventionally fabricated slot filter tubes. The slot tube construction of the invention comprises a torsion-rotation deformed structure of normally axially orientated parallel support members of the slot tube mantle, which further comprises spiral windings of profile wire around said support members, whereby at each contact crossing a solid weld connection fixes a crossing profile wire to a support member. The plastically twisted slot tube structure displays a helical distortion of the axial support ribs inside the slot tube. As a consequence the filter slot openings between adjoining windings of profile wire are markedly narrowed (versus undeformed slot tube), which offers the possibility of reliably achieving very small filter slot openings of less than 0.020 mm in slot tube filters or screens.

In a wastewater treatment plant a rag seeding tank is included in a process drain to collect hair and fibers which have passed through headworks of the plant. The hair and fibers tend to join together into large masses downstream of the headworks and can be damaging to process zones, particularly membrane zones. The rag seeding tank includes cartridges filled with surfaces that fibers and hair will attach to, so that hair/fiber rags grow in the seeding tank and are removed therefrom rather than causing problems downstream.

In a wastewater treatment plant a rag seeding tank is included in a process drain to collect hair and fibers which have passed through headworks of the plant. The hair and fibers tend to join together into large masses downstream of the headworks and can be damaging to process zones, particularly membrane zones. The rag seeding tank includes cartridges filled with surfaces that fibers and hair will attach to, so that hair/fiber rags grow in the seeding tank and are removed therefrom rather than causing problems downstream.

Screen intake assemblies and related methods of fabrication and operation that improve both operational performance and structural strength. The screen intake assembly can include one or more screen portions that run substantially and continually along the length of the screen assembly to provide increase fluid intake and uniform flow. The screen intake assembly can comprise a central manifold having an exterior manifold screen portion to provide additional filtering capacity. The screen intake assembly can be used alone or in combination with internal flow modifier structures to increase fluid intake and uniformity. Internal flow modifiers can include a perforated flow modifier pipe, an internal flow modifier pipe, and/or converging flow modifiers. The screen intake assembly can include cleaning systems that operate continuously or on demand.

An active strainer contains a housing with a cover, a base and side surfaces made in the form of filtering elements, pipes with channels fixed at one end at the central vertical axis of the strainer and configured to supply purified fluid from the central part of the strainer to the filtering elements from the other end of the pipe through channels, wherein the strainer housing is made of two parts, an upper and a lower one, each part is equipped with at least one filtering element, the turbine is installed between the upper and lower part and configured to rotate during the fluid flow passage through it, the turbine shaft is connected with the pipes, which are capable of sampling the purified fluid from the strainer housing during rotation of the turbine.

Provided is an organic matter processing apparatus, etc. that allows easy maintenance of a filter, and does not require a processing facility for a by-product. An organic matter processing apparatus S includes a processing tank 2 in which decomposition processing of organic matter is performed by a microorganism, a filter unit 20 including a filter 21 for removing solid matter included in a waste fluid generated by the decomposition processing, a reservoir 35 that stores the waste fluid from which the solid matter is removed by the filter unit 20, and a waste fluid circulation unit 40 that returns the waste fluid stored in the reservoir 35 to the processing tank 2.

A variable pore size filter media including an upper plate, a retainer, and a support profile disposed between the upper plate and the retainer. The variable pore size filter media also includes a plurality of wire rings disposed on the support profile and longitudinally distributed within a region between the upper plate and the retainer, the plurality of wire rings being distributed in a non-contiguous manner to form a plurality of spaces therebetween. The variable pore size filter media further includes a plurality of pores defined by the plurality of spaces between the plurality of wire rings and a pore size adjustment mechanism configured to vary a respective distance between each of the plurality of wire rings to increase or decrease a respective size of each of the plurality of pores by increasing or decreasing a size of each of the plurality of spaces.

A variable pore size filter media including an upper plate, a retainer, and a support profile disposed between the upper plate and the retainer. The variable pore size filter media also includes a plurality of wire rings disposed on the support profile and longitudinally distributed within a region between the upper plate and the retainer, the plurality of wire rings being distributed in a non-contiguous manner to form a plurality of spaces therebetween. The variable pore size filter media further includes a plurality of pores defined by the plurality of spaces between the plurality of wire rings and a pore size adjustment mechanism configured to vary a respective distance between each of the plurality of wire rings to increase or decrease a respective size of each of the plurality of pores by increasing or decreasing a size of each of the plurality of spaces.