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7572383 Process for filtering a fluid with a compressible filtration media  
A high rate, upflow filtration system is described in which a compressible, fibrous lump filtration media is compressed to adjust the porosity and collector size of the media in the bed and to...
7459086 Method for treating water containing iron, manganese and arsenic  
A method for treating water to produce potable water is described herein. The inventive method enables the efficient removal of iron, manganese, and arsenic without the addition of powerful...
7381336 Automated water treatment system and method of use  
An automated method for controlling a solids inventory in a continuous backwashing upflow sand filter system treating a liquid inflow having impurities therein, includes the steps of: monitoring an...
7273556 Method for treating water containing manganese  
The invention concerns a method for treating water for human consumption, so as to eliminate manganese and possibly other metals comprising steps which consist in: causing said water to pass at...
6706521 Bed cleaning system for fluidized-bed bioreactors  
A reaction chamber is adapted to contain a fluidized bed having a slurry of liquid, media and biomass. A lift and motive fluid are provided to urge slurry from the reaction chamber through a...
6692644 Process for recovering oil and sulfonates from filtration panel  
Process for treating filtration panels obtained by the filtration of oils containing sulfonates of earth-alkaline metal, the above filtration being carried out in the presence of filter aids...
6596160 Periodic ozone treatment system for a showering tower type water cooling system  
A periodic ozone treatment system for a showering tower type water cooling system worked once daily for a period of 10˜30 minutes essentially comprises: an ozone dissolving tank to prepare high...
6426005 Sequential descending bed filters with reject/washwater containing impurities being fed to a separate unit for elimination of impurities  
A treatment system for treating water/wastewater includes two continuously operating granular media filters that are operated together in series. The water/wastewater to be treated is introduced as...
6387283 Descending bed, continuously regenerating type filter with an adjustable length wash chamber  
An apparatus for continuously filtering a suspension includes a filter-medium washer provided with length-adjustable walls.
6361701 Method and device for continuous filtration of liquids  
The invention relates to a method and device for the continuous filtration of liquids containing solid matter, in particular for cleaning wastewater, by means of a filter bed consisting of a...
6306309 Method for cleaning sand in a sand bed  
The invention relates to a method and an apparatus for cleaning the sand beds of slow sand filters, infiltration basins and pools of other types having sand beds in water treatment works and...
6238567 Method of making brine for regeneration of a softening appliance  
Described is a method for making brine to be used for regenerating water softening appliances. The brine is made in a reservoir having a float mechanism therein coupled to a seal that prevents the...
6190568 Method for retrofitting a false bottom underdrain filter system  
A method for retrofitting a gravity filter with a porous plate filter media support that increase filter production by increasing the depth of the media, allows installation of an air backwash...
6117459 Filtration adjuvants, filtration supports, filtration process using them and process for regenerating said adjuvants  
The invention relates to new regenerable filtration adjuvants which are usable for the filtration of liquids, particularly beer at the end of the secondary fermentation storage, characterized in...
6110389 Filtration unit  
A filtration tank (1) for purification of polluted water includes a chamber (12). Upper and lower filtration screens (20, 22) are supported within the chamber. Filtration particles (18) are...
6077446 Sand filtration filtering system using ozone  
A device for filtering and disinfecting a fluid, such as waste water, is provided. The device includes a housing having an interior and a fluid inlet conduit in flow communication with the interior...
6015502 Reversing flow coalescing system  
Apparatus is provided for coalescing microscopic droplets of organic (principally hydrocarbons) that are present with particles in an aqueous stream (primarily water), which avoids frequent...
5945005 Fluid filter using floating media  
A filter system (110) includes a tank (130) with a conveyer (140) for, preferably continuously, conveying filter media (11) from a filter zone (119) in the tank (130) where the filter media (11)...
5904854 Method for purifying water  
A composite adsorbent element comprising a packed mixture of granules and fibers, which are desirably granular activated carbon (GAC) and activated carbon fiber (ACF). The element is employed as a...
5902488 Slow sand filter  
A slow sand filter system having a slow sand filter located under water and a scraping mechanism. The scraping mechanism has at least one auger and a shaft, the auger extending across the width of...
5833867 System and method for backwashing multiple filtration vessels  
A filter media washing system for washing contaminants from filter media of a plurality of filtration vessels. Each filtration vessel has a filtration screen subdividing the filtration vessel into...
5788842 Biomass separation apparatus and method  
A separator for use with a fluidized-bed bioreactor. A lift draws a slurry of liquid, media and biomass from the fluidized bed. A biomass discharge is connected to the lift and located above the...
5776354 Use of a porous, particulate material in a packed filter bed for liquid/gas and/or liquid/liquid separation  
A method for the use of a porous, preferably dimensionally stable, particulate material in a packed filter bed for separating a disperse liquid phase from a gas and/or separating a disperse liquid...
5766488 Method and apparatus for water treatment  
An apparatus for treating water includes a vertically extending contact vessel, wherein water is contacted with ozone, and a return vessel which contains a column of water of a sufficient height to...
5762801 Process and apparatus for biological treatment of water  
In the biological purification of sewage water or drinking water, it is known to purify the water in a filter bed of granular filter medium, wherein the filter medium is transported from the bottom...
5755959 Device for supplying a suspension to a filter at different levels within the filter and in proportions such that a uniformly distributed flow of suspension is achieved across the filter area  
A suspension is delivered to a filter bed comprised of granular filter medium in a continuously working filter at the lower part of the bed and is then permitted to flow upwards through the bed....
5750028 Biomass separation apparatus and method with media return  
A separator is provided for use with a fluidized-bed bioreactor. A lift draws a slurry of liquid, media and biomass from the fluidized bed. A biomass discharge is connected to the lift for...
5730886 Continuous self-cleaning filtration unit  
An improved vertical filtration unit includes a bell-shaped lower end for the air-lift tube, an injection ring for introducing air into the air-lift tube at a considerable volume, and a washbox...
5698106 Filtration process and apparatus  
It is possible to filter a suspension or emulsion in a filter bed of particulate filter medium by allowing the suspension to flow upwards through the filter bed simultaneously as the medium flows...
5635080 Filter system with external scrubber  
Method and apparatus by which contaminants are removed from a liquid flowing through a filter vessel having an inlet for providing a contaminated liquid flow into one end thereof and an outlet...
5573671 Method of and apparatus for water purification  
A biological purification process, a secondary treatment of partially cleaned waste water for example, is carried out in a porous bed of loose granules which float in the liquid. The granules are...
5454959 Moving bed filters  
A moving bed filter in which the liquid to be filtered is introduced into an internal chamber centrally disposed in the filter bed. The liquid flows through the filter bed to filtration nozzles...
5368752 Method of washing filters, and filters for liquid filtration  
The invention relates to a method for washing a filter intended for cleansing a contaminated liquid and having a granular bed, a drainage system located beneath the bed, means for introducing first...
5290457 Filter element with regenerable bulk material filling and method for making same  
A regenerable deep bed filter element and method for making it, the element being provided as a closed system, in the case of which a deep bed filter (21), disposed inside at least one...
5290458 Granular media regeneration process  
Regeneration of a granular media is produced by mechanically forming a slurry of the media in a liquid and separation of the liquid from the granular media by rapidly rotating a separator element...
5277829 Deep bed sand filter  
A deep bed upflow filter (10) for removing suspended solids from an influent stream to provide a clean filtrate, comprising an upright vessel (12) having a vertical axis (14), top and bottom ends...
5277828 Steam regenerable filter and method  
A filter assembly for fluids such as air and water employs a cleanable filter. The filter is located within a housing having a reservoir, and a steam generator which can be selectively operated to...
5254267 Grease separating method and separator system  
A grease separation system includes a main grease separator tank [11] which has a plurality of filters [23] suspended along the upper portion of the tank above a bed of grease absorbing material...
5252230 Granulated filter for the filtration of fine graded suspensions  
A granular filter is arranged for filtration of suspensions where the flow through the bed is horizontal. The bed depth is less than about 12 cm and the media particle size is less than about 0.6...
5198124 Upflow filter and method of washing same  
A method of washing an upflow filter between service runs employs a filter bed having a non-buoyant particulate filter layer through which influent to be filtered is directed in an upward...
5173194 Filtration method and apparatus having a filtrate collection chamber within the filter bed  
A filtration apparatus includes a vertical column of filter media contained in and defined by a liquid-impervious vessel. A filtrate collection chamber is fixedly and centrally located in the media...
5166220 Water softening process  
An improved process for regenerating the ion exchange resin in a water softening system. The process substantially reduces the amount of water and salt required for regeneration of the resin. The...
5124043 Method for treating fluids  
A method and apparatus for the continuous treatment of fluid with a contact media. The apparatus includes a plurality of vertically arranged chambers through which the fluid flow passes. The...
5122287 Filtration system  
The filtration system provides a long horizontal flow path through buoyant filter media. The filter media is contained in a vessel and the relationship between the water level in the vessel and the...
5114595 Multiple screen filter and method  
A method and apparatus for filtering a fluid through a particulate filter medium and for periodically scrubbing the particulate filter medium of accumulated contaminating material. During the...
5112504 System and method of decreasing waste fluid in continuous backwash filtration  
A filtering system includes a filter vessel containing a movable granular media bed, a feed stream inlet port for flowing a liquid-solid stream through the bed for filtration, a dirtied media...
5080808 Method of washing an upflow filter and filter bed employed in said filter  
A method of washing an upflow filter between service runs employs a filter bed having a non-buoyant particulate filter layer through which influent to be filtered is directed in an upward...
5019278 Continuous washed sand filter and washer  
A sand filter is provided where dirtied filter media, generally sand, is continuously withdrawn from the filter container and lifted to the top of a juxtaposed separate wash vessel outside the...
4891142 Moving bed filtration apparatus and method  
A bed of particulate material of varying sizes is located within a vessel. This bed comprises an upper and lower region. Particulate material is supplied continuously to the center of the upper...
4842744 Method for continuous filteration of fluids  
By this method, the fluid to be filtered is led through a filter bed formed of particulate filter particles, such as sand, which filter bed is retained in an upstanding annular space. The fluid is...
Matches 1 - 50 out of 73 1 2 >