A water filter assembly may include a filter body having vertical side walls that defines a cavity within which one or more filter layers may be housed, the filter body further including a plurality of vertical barriers that define a plurality of flow paths that converge on an outlet hole, the vertical barriers further including a plurality of cutouts defining alternative overflow paths permitting water therethrough, and each filter layer including a plurality of vertical barriers that define a plurality of flow paths.

A cleaning system for filter beds uses the existing permanent infrastructure of a water filtration plant. Treatment fluids of opposite pH are introduced into a pair of filter cells that are separated by a gullet. Each filter cell contains a filter bed. One filter cell receives an acidic treatment fluid and the other receives an alkaline treatment fluid. After treatment is complete, the treatment fluids from each filter cell are simultaneously drained into the gullet, where mixing and neutralization occur. The resulting spent treatment fluid has an intermediate pH that allows it to be safely drained into a wastewater sewer.

A filtration device comprising a media basket, a baseplate, and a canister. The media basket is affixed to the baseplate. The canister has a cavity therein and is detachably coupled with the baseplate to enclose the media basket. The media basket contains a porous filtration material that efficiently removes contaminants from liquid. The device is configured to establish a first siphon to convey liquid from outside the device into the canister cavity through a canister pipe when a liquid level outside the filtration device is higher than the top of the weir in the canister pipe and configured to establish a second siphon to convey liquid from canister cavity through the top of a center riser pipe and out an outlet pipe when the first siphon has been established and the liquid level outside the filtration device is higher than the top of the center riser pipe.

An interface seal assembly for sealing a tubular filter element relative to a first component and a second component of a fluid filtration system. The interface seal assembly comprises an body located between the first and second components, and having: an aperture extending through the body for communicating with an internal cavity of the filter element; a first mounting surface comprising a first seal groove; and a second mounting surface opposite the first mounting surface, comprising a second seal groove. One of the first and second seal grooves has a circular shape, and the other has a non-circular shape. A first seal is located in the first seal groove, for sealing the interface body relative to one of the first and second components. A second seal is located in the second seal groove, for sealing the body relative to the other of the first and second components.

A filter unit is provided for filtering a liquid. The filter unit is intended to be connected to a cap including a first liquid passage and a second liquid passage 114. The filer unit includes: a canister; and a filter cartridge rotatably arranged within the canister, the filter cartridge includes a first filter connection for liquid to pass through, the first filter connection is intended to be connected to the first liquid passage in the cap, wherein the canister is intended to be rotatably attachable to the cap such that, when the canister is attached to the cap by a rotating action, the filter cartridge is stationary to the cap.

A process of removing at least one metal contaminant, such as copper, from a fluid hydrocarbon, for example, crude oil or a liquid hydrocarbon fuel, such as an aviation fuel. The process involves contacting the metal-contaminated fluid hydrocarbon with a sorbent selected from graphene oxide or a functionalized graphene oxide, particularly, a graphene oxide treated with a polycarboxylic acid, such as a saccharide polycarboxylic acid or a salt thereof, examples of which include alginic acid and Group IA and IIA salts thereof. The process removes greater than 99 percent of the metal contaminant without reducing concentrations of advantageous fuel additives, such as, antioxidants, icing inhibitors and corrosion inhibitors. Also described are a purified fluid hydrocarbon composition and a metal contaminant filter system.

A filtration device comprising a media basket, a baseplate, and a canister. The media basket is affixed to the baseplate. The canister has a cavity therein and is detachably coupled with the baseplate to enclose the media basket. The media basket contains a porous filtration material that efficiently removes contaminants from liquid. The device is configured to establish a first siphon to convey liquid from outside the device into the canister cavity through a canister pipe when a liquid level outside the filtration device is higher than the top of the weir in the canister pipe and configured to establish a second siphon to convey liquid from canister cavity through the top of a center riser pipe and out an outlet pipe when the first siphon has been established and the liquid level outside the filtration device is higher than the top of the center riser pipe.

A horizontal-flow sand filtration pool and a water treatment process thereof. The horizontal-flow sand filtration pool includes a pool body, a raw water inlet assembly, a sand filtration bed, a filtered water outlet assembly, an aeration assembly, and a back washing assembly; the raw water inlet assembly includes a water inlet pipe and a water distribution device that supplies raw water to the sand filtration bed; the water inlet pipe is connected with the water distribution device, the water distribution device is provided in the sand filtration bed, and a plurality of water outlet channels are uniformly distributed on the vertical surface of the water distribution device; the filtered water outlet assembly includes a water collector and a water outlet pipe; the water outlet pipe is communicated with the water collector; the back washing assembly includes a back washing pipe and a drainage pipe.

The present invention discloses a filtration system for treating untreated liquid such as greywater or any liquid that is contaminated with impurity and is required to be treated before use. The filtration system is a gravity fed liquid treatment system and includes components such as a top liquid tank for holding untreated liquid and a bottom liquid tank for holding treated liquid. The filtration system further includes one or more filtration media containers and filtration columns. Each filtration column is a composition of the stacked filtration media containers. The filtration system may be used for cleaning the contaminated water or keeping clear the surface of open water from oil or the like floating materials by separating or removing these materials from the water. The filtration system may include portable or detachable small-scale multistage treatment devices and may be implemented using household-type filters for producing potable filtration system.

Structures, methods, and assemblies for stormwater management systems with one or more internal bypass features incorporated into a vault-shaped enclosure are described, along with methods and additional structures that are useful for managing stormwater flow and inhibiting the flow of pollutants, debris, and other contaminants into drainage systems. A first compartment disposed within the vault and comprising a removable bypass pipe, a baffle wall adjacent to the bypass pipe, a screened floatables baffle attached to the baffle wall, and a fluid-conveyance opening disposed along the baffle wall are described. A fluid-conveyance opening is located below the top of a bypass pipe, and a second compartment is in fluid communication with the first compartment through the fluid-conveyance opening. A second compartment is adapted to incorporate a filtration cartridge. An underdrain defined at least in part by the upper and lower floor slabs of the vault is disposed below and in fluid communication with the first compartment through the bypass pipe.