The present disclosure relates to a separating device for removing solid particles from fluids, and to the use of said separating device for removing solid particles from fluids.

An underdrain apparatus and a method for manufacturing such apparatus are provided. The underdrain apparatus can be extruded in long sections as a unitary part. The underdrain apparatus may be extruded in various sizes, shapes, and materials. Further, the underdrain apparatus may include a passageway for transporting water to and from the filter media and/or air to the filter media. In some embodiments, apertures are formed in the underdrain apparatus during an extrusion process to provide a path between the passageway and the filter media.

A liquid treatment system includes: a filter casing including a structural wall, a first screen formed though the structural wall, and a second screen formed though the structural wall; and a liquid treatment cartridge configured for placement in the filter casing between the first and second screens. The liquid treatment cartridge includes a cartridge casing having an upper end and a lower end, and an inflatable seal surrounding the cartridge casing at an intermediary position between the upper end and lower end. A method of servicing a groundwater treatment installation includes: vertically displacing a liquid treatment cartridge within a filter casing having a structural wall, a first screen formed though the structural wall, and a second screen formed though the structural wall.

A liquid treatment system includes: a filter casing including a structural wall, a first screen formed though the structural wall, and a second screen formed though the structural wall; and a liquid treatment cartridge configured for placement in the filter casing between the first and second screens. The liquid treatment cartridge includes a cartridge casing having an upper end and a lower end, and an inflatable seal surrounding the cartridge casing at an intermediary position between the upper end and lower end. A method of servicing a groundwater treatment installation includes: vertically displacing a liquid treatment cartridge within a filter casing having a structural wall, a first screen formed though the structural wall, and a second screen formed though the structural wall.

Systems and related methods for purging air burst supply piping of accumulated water prior to delivering pulses of pressurized air to an interior of a screen intake through the air burst supply piping. The systems and methods can include a purge compressor delivering a purging air supply at a head pressure slightly above a head pressure of water in the air burst supply piping, wherein the head pressure of the water is equivalent to a depth at which the intake screen. The system and methods can also include a purge line arranged in a parallel orientation to an air burst supply line, wherein both the purge line and the air burst supply line are operably coupled to a pressurized air tank.

The present disclosure relates to a multipurpose casing device (MCD) which controls fluid flow in a filter casing for the primary purpose of directing contaminated fluid (e.g., groundwater) to contact treatment media inside a fluid-treatment cartridge by sealing off an annular space between the filter casing and the cartridge. The MCD assembly also permits hydraulic testing of the integrity of a barrier wall attached to a filter casing by sealing off an inlet or an outlet screen of a filter casing. The MCD assembly allows measurements of physical or chemical properties of a fluid at a specific elevation in a filter casing using hollow core tools connected to an MCD. The MCD can further be used to surge fluids through inlet and/or outlet screens of filter casing that may need to be periodically cleaned.

The present disclosure relates to a multipurpose casing device (MCD) which controls fluid flow in a filter casing for the primary purpose of directing contaminated fluid (e.g., groundwater) to contact treatment media inside a fluid-treatment cartridge by sealing off an annular space between the filter casing and the cartridge. The MCD assembly also permits hydraulic testing of the integrity of a barrier wall attached to a filter casing by sealing off an inlet or an outlet screen of a filter casing. The MCD assembly allows measurements of physical or chemical properties of a fluid at a specific elevation in a filter casing using hollow core tools connected to an MCD. The MCD can further be used to surge fluids through inlet and/or outlet screens of filter casing that may need to be periodically cleaned.

According to an embodiment, there is provided a method for mitigating seawater intrusion in the ground where an aquifer having a seawater-fresh water interface is formed, the method including: installing an injection well at a point on an inland area, spaced apart from the sea by a predetermined distance, to a predetermined injection depth (d), the injection well having a predetermined screen height; injecting seawater into the aquifer by a predetermined quantity of injection through the injection well; and forming an upper seawater area around the injection well by the injection of the seawater, wherein the upper seawater area is an area that is filled with seawater in an upper portion of the aquifer.

Systems and related methods for purging air burst supply piping of accumulated water prior to delivering pulses of pressurized air to an interior of a screen intake through the air burst supply piping. The systems and methods can include a purge compressor delivering a purging air supply at a head pressure slightly above a head pressure of water in the air burst supply piping, wherein the head pressure of the water is equivalent to a depth at which the intake screen. The system and methods can also include a purge line arranged in a parallel orientation to an air burst supply line, wherein both the purge line and the air burst supply line are operably coupled to a pressurized air tank.

An underdrain apparatus and a method for manufacturing such apparatus are provided. The underdrain apparatus can be extruded in long sections as a unitary part. The underdrain apparatus may be extruded in various sizes, shapes, and materials. Further, the underdrain apparatus may include a passageway for transporting water to and from the filter media and/or air to the filter media. In some embodiments, apertures are formed in the underdrain apparatus during an extrusion process to provide a path between the passageway and the filter media.