Abstract:
A particulate filtering device with a multi-layer water distribution and collection structure and a method for using the same are provided. The device includes a tank where a filtering space and a back flushing expansion space are formed. An upper water distribution pipe is arranged above the back flushing expansion space and is in communication with an ozone gas-water mixing pipe. Ozone enters the back flushing expansion space through the upper water distribution pipe and mix with water for reaction. Exhaust gas is discharged from the top of the tank. Powdered activated carbon may enter the tank through the upper water distribution pipe, and is intercepted at a space above the filtering space to form an activated carbon layer, to absorb organics dissolved in the water and catalytically decompose ozone. At least three water distribution and collection pipes are arranged on a layer basis in the filtering space.
Abstract:
A filter assembly includes a body of filter media, a seal, and a compression ring. The body of filter media having a first end surface, a second end surface spaced apart from and opposing the first end surface, and an outer surface extending between the first end surface and the second end surface. The seal surrounds the first end surface. The compression ring is disposed about the second end surface. The compression ring includes a first channel configured to allow fluid communication between the second end surface and the outer surface.
Abstract:
A regenerable system for filtration of microfibres contained in a liquid effluent from a textile treatment device comprises at least one enclosure (10) in which a granular medium (30) is arranged, means (100) for passage by percolation of the liquid effluent through the granular medium, means (110) for discharging the liquid effluent under granular medium (30), and means (120) for connection to means for regeneration by fluidization of granular medium (30). A method for filtering microfibres contained in a liquid effluent from a textile treatment device can be implemented by means of such a system.
Abstract:
A self-contained, portable, waste water evaporating apparatus is shown. A solar-operated submersible pump pumps waste water from just under the surface of a waste water pit, through a pair of automatic backflushing filters and out misters located around the bank of the waste water pit. At a predetermined pressure across the automatic backflushing filters, the automatic backflushing filters are reverse cycled, one at a time, to backflushing particles back into the waste water pit. Periodically, the misters are purged and/or cleaned to remove particles therefrom. In response to sunlight, solar panels provide DC voltage directly to the submersible pump. If pressure from the submersible pump gets excessive, a pressure relief valve removes the excess pressure.
Abstract:
An object is to provide a water treatment apparatus having a simple structure for cleaning treatment layers and having a low production cost, and a water treatment method using the water treatment apparatus. The water treatment apparatus of the present invention includes a tubular main body disposed in a lateral direction, in which an untreated liquid is supplied from one end side of the main body in an axial direction, and a treated liquid is discharged from another end side thereof. The water treatment apparatus includes a cleaning fluid supply unit that is connected to a lower circumferential surface of the main body and that supplies a cleaning fluid to an inside of the main body, and a cleaning fluid collecting unit that is connected to an upper circumferential surface of the main body and that collects the cleaning fluid from the inside of the main body. The main body includes a plurality of treatment layers which are partitioned along the axial direction and in which a plurality of particles are enclosed.
Abstract:
A coated granular filtration medium is formed by the deposition of an electrolyte layer onto core particles. The electrolyte layer comprises a cationic polyelectrolyte. The coated granular filtration medium provides a synergistic combination of filtration and in situ coagulation that enables efficient, effective, and economical decontamination of industrial and other wastewaters.
Abstract:
Flow of water is in the same direction during a water-filtering cycle and a filter-cleaning cycle. That feature leads to an especially simple, economical and effective system for (a) producing filtered water and (b) cleaning, during a filter-cleaning cycle, the filter that cleans the water of particulates. No backwash is needed.Forward wash filter cleaning makes use of principles of physics, man-made equipment, and attraction of black sand (e.g., sand containing magnetite) to magnets. Those elements are combined in a novel way to (a) constrain the sand in a compact but permeable filtering layer and (b) allow a forward wash filter-cleaning cycle by simply flowing water through a layer of particulate-laden black sand after the layer has been made less compact by being disrupted during the filter-cleaning cycle. In other words, particulates previously trapped during a water-filtering cycle are washed away in forward-flowing, particulate-laden water during the filter-cleaning cycle.
Abstract:
A filtration system having an underdrain block and an underdrain wall adaptor. The underdrain wall adaptor includes a vertical end and horizontal base. The vertical end extends from a top wall to a bottom wall of an underdrain block and mates with an end portion of an underdrain block to secure the underdrain wall adaptor to the underdrain block. The horizontal base extends from the vertical end. The invention also includes a method of installing an underdrain wall adaptor. The underdrain wall adaptor controls air and water passage between the flume and the underdrain.
Abstract:
Open filtering equipment for a water treatment station, for open filters with a filter bed such as sand, coal, etc., comprising a plurality of support legs (10), a plurality of frames (20) supported on said support legs (10), each having at least one opening (22), said plurality of frames (20) being suitable to cover the bottom of a filter, and a plurality of filtering assemblies with a flat upper surface, each of them attachable on a frame (20) covering an opening (22) thereof, and each filter assembly comprising a filtering grid (32) for filtering the water from the filter bed by filtering.
Abstract:
An apparatus for use in a filter system for filtering water or wastewater. The apparatus preferably includes at least one underdrain lateral having at least an inner chamber, a first outer chamber and a second outer chamber. The first outer chamber and the second outer chamber are preferably in fluid communication with the inner chamber. The inner chamber, the first outer chamber and the second outer chamber are preferably formed by an inner liner and an outer liner. The outer liner is a separate piece from the inner liner and surrounds the inner liner. The inner chamber is preferably configured to simultaneously receive a liquid and a gas during a washing procedure including simultaneous use of a liquid and gas to clean a filter bed to create a liquid and gas interface in the inner chamber.