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| Number | Title | Issue Date |
| 7807060 | Filter with resuspension of solids The invention relates to a method for extracting solids (23; 123) from a suspension (22; 122) containing the solids (23; 123) and suspension liquid (32; 132) in a continuously or virtually continuously operating filter device (10; 110 | 10/05/2010 |
| 7429329 | Hybrid chemical/mechanical dewatering method for sewage treatment plants A hybrid chemical/mechanical dewatering sewage treatment plant and method employing rapid sludge chemical dewatering technology in conjunction with slower conventional mechanical dewatering solids agglomeration and disposal methods to meet operating constraints and ... | 09/30/2008 |
| 7413681 | Process to dewater a soot water slurry obtained in a gasification process A process for partial oxidation of a hydrocarbon gas or liquid, involving the steps of partial oxidation and removal of soot by forming a slurry having water and carbon from the gaseous oxidation product, and separating part of the water from the slurry to obtain a ... | 08/19/2008 |
| 7410568 | Sludge treatment An apparatus for treating sludge, comprises a press for dewatering the sludge, a compaction device for receiving and compacting sludge dewatered by the press, a shredder for receiving and shredding sludge compacted by the compaction device, and a tube conveyor for c... | 08/12/2008 |
| 7347933 | Self-cleaning intake screen A self-cleaning screen that automatically cleans both the inside and outside surfaces of the cylindrical screen using only the rotation of the cylindrical screen itself. This self-cleaning ability is accomplished by using a fixed brush on the exterior surface of the... | 03/25/2008 |
| 7335311 | Sludge treatment An apparatus for treating sludge, comprises a press for dewatering the sludge, a compaction device for receiving and compacting sludge dewatered by the press, a shredder for receiving and shredding sludge compacted by the compaction device, and a tube conveyor for c... | 02/26/2008 |
| 7321073 | Process for treating low solids content hazardous materials A high temperature and high pressure process utilizes dehaloganation, oxidation, or similar reactions to chemically alter hazardous organic chemicals to render them non-hazardous. The method is particularly adaptable to the treatment of sediments in bodies of water ... | 01/22/2008 |
| 7314141 | Folding belt filter A belt filter for effecting separation of liquid from solids where, at the collection zone, a filter belt or belts is changed shape so as to provide a supporting shape to bold liquid, which is then fed into a nipping zone. In an embodiment there is a single belt use... | 01/01/2008 |
| 7229524 | Feeding arrangement for feeding of chips to chip bins The invention relates to a feed arrangement for feeding chips to chip bins (1) in the production of cellulose pulp in continuous digesters (16), in which the chip bin is constituted by a treatment vessel having a top and a bottom, in which the chips ar... | 06/12/2007 |
| 7172704 | Method for treating waste water A method for treating waste water fluid, wherein the method comprises the steps of macerating waste water fluid in a first tank forming a sheared fluid, filtering the sheared fluid to remove solids, forming unfiltered waste water and product water, flowing product w... | 02/06/2007 |
| 7153477 | Device and method for separating components of a fluid sample A device and method is provided for separating heavier and lighter fractions of a fluid sample. The device includes a plurality of constituents comprising a container and a composite element in the container. The composite element is a separator comprising at least ... | 12/26/2006 |
| 7115204 | Pool pump filter A filter comprises a cage that captures a foraminous center tube. The cage comprises end plates secured to multiple posts. A screen is wrapped with at least one full inner wrap around the center tube and with at least one full outer wrap around the posts. The screen... | 10/03/2006 |
| 7112283 | Method and system for processing waste A method and system of processing animal waste, whereby liquid is removed from the waste and recycled for use in other applications. Moreover, use of the method and system facilitates capture of the solid waste, which may then be used as fertilizer. In the present m... | 09/26/2006 |
| 7105088 | Methods and systems for converting waste into energy A method for receiving animal waste from animal confinements or other concentrated animal waste sources and for converting the waste into a usable form is described. The waste contains both liquids and solids. The method includes separating the liquids and solids in... | 09/12/2006 |
| 7097046 | Automatically cleaning filter assembly for a liquid-carrying loop A filter assembly for an aquarium has a self-cleaning filter. A fine mesh filter screen is disposed between an inlet and an outlet for filtering solid matter from the water that is pumped from the aquarium, through the filter, and back to the aquarium. When the filt... | 08/29/2006 |
| 7094338 | Method of making and using a filter in the form of a block of agglomerated copolymer fragments One of the exemplary filter systems described includes a bracket and a filter module that can be suspended from the bracket by a plurality of flexible supports. The bracket can support the filter system beneath the grate of a storm drain without the need for the fil... | 08/22/2006 |
| 7074338 | Filtering method and filtering device Using the filter auxiliary agent separated by backwashing from a filter element repeatedly and effectively, the consumption amount of a filter auxiliary agent and the generation of industrial waste can be suppressed. In a filter auxiliary agent pre-coat circuit, a f... | 07/11/2006 |
| 7048853 | Process for removing arsenic from drinking water Arsenic is removed from water and other aqueous feeds by (1) treating the feed with a compound containing cerium in the +4 oxidation state, preferably cerium dioxide, to oxidize arsenic in the +3 oxidation state to arsenic in the +5 oxidation state and (2) removing ... | 05/23/2006 |
| 7036295 | Aquatic growth harvester A deck slotted into a left and a right deck halves in spaced apart positions so as to provide a slot therebetween. On each of the deck halves a pair of drums are mounted for rotation. Around each of the pairs of drums a rubber belt is engaged so that the rubber belt... | 05/02/2006 |
| 6978725 | Process and apparatus for treating biogenic residues, particularly sludges The invention relates to a process and apparatus for treating biogenic residues, particularly sludges, preferably in the area of a clarification plant. Biogenic residues with a variable dry substance are subjected to aerobic drying until an energy-independent therma... | 12/27/2005 |
| 6969469 | Method of using waste tires as a filter media The present invention is a method of using crumb rubber from recycled tires as a filter media. The use of crumb rubber as a media differs from conventional sand or anthracite filters in several ways. The crumb rubber media is compressible which allows the porosity b... | 11/29/2005 |
| 6890441 | Hydraulic annular washing column, and process for separating solids from a suspension An apparatus for separating solids from a suspension includes a hollow cylindrical column having a central axis therethrough. The column has an interior with a cross-section, perpendicular to said axis, that is constant along said axis, and that extends from a first... | 05/10/2005 |
| 6878292 | Filter device A filter device has a filter housing, which is intended to contain a liquid to be filtered and in which at least one filter rod is arranged. The filter rod is composed of annular washers, which are arranged in a stack on a core formed with openings and which are so ... | 04/12/2005 |
| 6852237 | Method for improved recovery of metals Methodology for the extraction of metallic elements from solid and liquid metal-contaminated starting material such as mineral ores, recyclable wastes, contaminated soils, engraving solutions, metal finishing solutions, battery manufacturing solutions, toxic wastes ... | 02/08/2005 |
| 6746646 | Method and apparatus for the disinfecting biosolids A biosolids treatment system comprising a storage tank for containing a quantity of biosolids sludge, a system of disinfection piping within the storage tank comprised of a segment of inner biosolids piping having a plurality of holes spirally arranged at a desired ... | 06/08/2004 |
| 6706199 | Method for withdrawing and dewatering slag from a gasification system The present invention relates to an apparatus and method for withdrawing and dewatering slag from a gasification system. In particular, the present invention relates to a conveying lockhopper and method of using the conveying lockhopper to collect slag and other was... | 03/16/2004 |
| 6562245 | Crushed foam glass filter aid and method of use Disclosed is filter aid formed of a crushed foam glass utilized as a filtering aid for removing suspended materials in a fluid stream by first providing a permeable support with the crushed foam glass filter aid placed adjacent thereto, and directing the ... | 05/13/2003 |
| 6555013 | Treatment method for things like sludge and treatment apparatus A method and apparatus for treating an aqueous-containing sludge in which the sludge is filtered on an elongate moving sheet of a water permeable unwoven fabric on paper. The moving sheet is folded and compressed between rollers whereby to express water t... | 04/29/2003 |
| 6555010 | Solution mining process for removing metals from aqueous solution A process is disclosed for obtaining colloid-forming metal particles from an aqueous mine waste solution containing that metal in ionic form. In accordance with this process, an aqueous mine waste solution containing that metal in ionic form is provided h... | 04/29/2003 |
| 6524486 | Microalgae separator apparatus and method An apparatus and method for separating microalgae from water without rupturing cells. The method comprises the steps of flocculation, flotation and dehydration. Microalgae suspension from a reservoir is passed to a mixer unit where flocculation is carried... | 02/25/2003 |
| 6406629 | Biological process for removing phosphorous involving a membrane filter A waste water treatment process for biologically removing phosphates incorporates a membrane filter. The process includes three zones, an anaerobic zone, an anoxic zone and an aerobic zone containing an anaerobic, anoxic and aerobic mixed liquor. Water to... | 06/18/2002 |
| 6256902 | Apparatus and method for desiccating and deagglomerating wet, particulate materials An apparatus and method for drying and deagglomerating substances of finely-divided solids suspended in a fluid medium. The apparatus includes the basic components of a phenumatic friction dryer, a flash dryer and a ring dryer.... | 07/10/2001 |
| 6241900 | Unrollable media filtration with subsequent folding and pressing of media According to a waste water treatment method and apparatus of the present invention, a permeable sheet 3 is fed into a treatment tank 2 in which a stream is formed. The waste water, which flows downstream, is caused to pass through the permeable sheet 3, w... | 06/05/2001 |
| 6207065 | Integrated liquid discharge system Liquid waste generated aboard a maritime vessel is separated into oily and non-oily components for separate treatment to obtain flow streams having different waste contents. Those of the flow streams having waste content reduced by the treatment are disch... | 03/27/2001 |
| 6190566 | Treatment of waste produced by farm animals raised under confined conditions Noxious odors and water pollution commonly associated with the raising of hogs, cattle or poultry under confined conditions are eliminated by replacing the conventional waste lagoon and waste spreading fields with a wastewater treatment plant. The treatme... | 02/20/2001 |
| 6187206 | Thermal plasma reactor and wastewater treatment method The invention relates to a reactor for the treatment of wastewater solutions containing cyanide and other dissolved organic material, having an elongated tube having an entrance (28) and an exit (32), and an energy source (22) for the tube, preferably pos... | 02/13/2001 |
| 6143176 | Method of converting organic wastes to valuable resources The improved method of converting organic wastes to valuable resources comprises a methane fermentation step (4) in which a slurry of organic waste is retained for fermentation in an anaerobic digester to thereby generate a methane-containing gas and a fe... | 11/07/2000 |
| 6048458 | Apparatus and method for waste recycling and conversion Municipal solid waste is classified as to density as well as size in a perforated inclined trommel through which a gas stream is flowed inwardly through the perforations and downwardly to entrain aid remove paper and plastics through the lower end. Ferrou... | 04/11/2000 |
| 6039885 | Process and device intended for ultrafiltration of particles in fluids Process and device intended for ultrafiltration of particles contained in fluids. The fluids are passed through at least one filtering barrier made from a source rock with micropores below a few hundred Angstroms in diameter. These rock samples are availa... | 03/21/2000 |
| 5945004 | Method and apparatus for treating waste liquids containing body fluids A method and apparatus for treating waste liquids containing body fluids so as to prevent problems such as nosocomial infection due to such waste liquids containing body fluids discharged from patients under (surgical) operation or treatment, particularly... | 08/31/1999 |
