The instant invention, in one aspect, provides a process for decontaminating water to remove contaminants, said process comprising passing contaminated water through a filter comprising a plurality of filtering elements capable of lowering the contaminants by at least 70%. In another aspect is provides a filtering unit comprising a plurality of filtering elements arranged in individual layers, said individual layers independently selected from brick chips, hemp fibers, mixture of hemp fibers and charcoal, agave, jute fibers, sand, filter paper, and gravel.

A continuous backwash upflow media filter comprises a container having a conical bottom; a wastewater influent tube having an opening within the container; an effluent weir within the container and an effluent tube with an opening in the effluent weir; a reject weir within the container below the effluent weir and a reject tube with an opening in the reject weir; an inverted deflection cone within the container positioned below the opening of the wastewater influent tube forming an annular space between the inverted deflection cone and the conical bottom of the container; an airlift pipe having a lower opening below the inverted deflection cone and below the annular space; and a sludge lift tube having a lower opening inside the media-free cavity formed by the inverted deflection cone above the annular space and an upper opening adapted to discharge sludge out of the container.

A combined water aeration and filtration unit (WAFU), having a tank with a vent section at a top of said WAFU and above an aeration section above a filtration section at a bottom of said WAFU. The vent section has one or more demisters and one or more vents for detraining water and providing a dry air exit from said WAFU. The air section has a water inlet ending in a spray nozzle near the top of the aeration section to turn incoming dirty water into water droplets and a forced air blower on a side or top of the aeration section for blowing air through said water droplets in rate sufficient to remove volatile organic compounds and precipitate manganese and iron. The aeration section also has one or more annular rings or partially annular baffles on an inside wall of the tank to force water from said inside wall into an interior of the tank. Thus, no water escapes aeration. A backwash collection trough and backwash water outlet are positioned above the filtration section for removing dirty backwash water from the unit. The filtration section has one or more filters therein and a drain and clean water outlet near its bottom for egress of clean water from said WAFU.

A media retention plate for an underdrain system having one or more filter blocks. The plate can include a first slot configured to allow the passage of air and a second slot configured to allow the passage of water during an air backwash. The media retention plate is configured to facilitate the water to flow back into the one or more filter blocks through the second slot while maintaining air flow through the first slot to create an optimal collapse pulse. The first and second slots are evenly sized and evenly spaced apart to facilitate the creation of a relatively smaller-sized collapse pulse during a sequential air-water backwash. A plurality of inserts can be arranged along a perimeter of a basal portion of the bottom surface of the media retention plate. The inserts improve the structural integrity of and prevent uplift of the media retention plate.

A system and method for in situ dewatering and stabilizing waste material deposits previously created from sluicing into a waste impoundment. The method includes access for installation of wells and grading for surface drainage and storm water control. If free water is present, primary dewatering siphons or decants the free water in the pond. The system includes vertical dewatering well installation that requires drilling, well completion materials for filtering leachate, and well pump installation for removing leachate from the well. Collection piping collects leachate from the wells and transfers the leachate to a discharge solution. The dewatering operation collects and removes leachate from the pond ash deposit and impoundment, reuses or treats the leachate at a discharge solution, remediates contaminants and/or hydraulic head in the impoundment, and consolidates and stabilizes the dewatered solids. Impoundment closure includes horizontal drains, final grading, final cover or overfill landfill development, and post closure.

A surface filter for aquarium water purification is placed on the bottom of the aquarium that sucks the waste out of the tank to the canister filter. Small plastic pieces make and connect the main stream channels. Each plastic piece is composed of a couple of inverted pyramids that acts like a funnel. Water flows through the main channels sucked by an external filter. In the base of each inverted pyramid a small hole opens to the drainage channel, which has a hollow inverted V shape. Water, particles and fish waste are passed through the channels to the external filter. At the end of the assembly a cross channel collects the drained water. Collected water is transferred to the external filter outside the aquarium. A hose connects the external filter with the collector. Another hose is connected to the same filter to return the filtered water back to the aquarium.

A media retention plate for an underdrain system having one or more filter blocks. The plate can include a first slot configured to allow the passage of air and a second slot configured to allow the passage of water during an air backwash. The media retention plate is configured to facilitate the water to flow back into the one or more filter blocks through the second slot while maintaining air flow through the first slot to create an optimal collapse pulse. The first and second slots are evenly sized and evenly spaced apart to facilitate the creation of a relatively smaller-sized collapse pulse during a sequential air-water backwash. A plurality of inserts can be arranged along a perimeter of a basal portion of the bottom surface of the media retention plate. The inserts improve the structural integrity of and prevent uplift of the media retention plate.

A water holding system 1 including lining a hole 2 with both a permeable 10 and impermeable 20 to water layer in the form of a film or sheet, the impermeable layer 20 positioned exterior relative to the permeable layer 10 the hole 2 is filled with a water permeable filtration medium 3, wherein the water holding system 1 includes a valve 30 positioned at a base 1a of the water holding system 1 and an access pipe 40 including Agi pipe extending from the valve 30 to ground level 4.

A gas lift conveyance device moves a slurry through an upwardly extending lifting section of a conduit in communication from a source location at a first pressure to a discharge location at a lesser second pressure. A gas injector of the device injects gas into the conduit through a variable position valve that is controlled by a controller that uses a representative value measured by a sensor as input to a closed loop control algorithm of the controller. The representative value may be a pressure or flow rate that is representative of the gas delivery rate. The device provides: (i) automated control over the delivery rate of slurries; (ii) real time values of air rate, valve position, and pressure; (iii) a reduction of energy input due to optimal use of air; and (iv) a reduction in air pumps stalling or plugging failures.

A fluid management system can include a first chamber, a diffusion plate positioned in the first chamber configured to receive fluid and to direct the fluid along a bypass fluid flow path or a primary fluid flow path, a riser pipe positioned within the first chamber that conveys fluid from the diffusion plate into a second chamber, and a filtering apparatus positioned in the second chamber. The filtering apparatus can include a plate having a first opening, one or more modules coupled to the plate having one or more perforations and a second opening corresponding to the first opening, and filter media disposed adjacent to the one or more modules, and a slab positioned above the filtering apparatus.