Utilizing Aluminum, Calcium, Or Iron Containing Agent Patents (Class 210/667)
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Patent number: 7901582Abstract: A phosphorus recovery method and a phosphorus recovery system which can make equipment size small, and can be added easily also to an existing wastewater treatment facility, and can recover phosphorus by low cost, are provided. A phosphorus compound adsorption material includes a nitrogen containing compound which has an amino group at an end of molecular structure, a carrier supporting the nitrogen containing compound, and zinc ion or iron ion fixed to the nitrogen containing compound. After passing water to be treated containing phosphorus to an adsorption tower filled up with this phosphorus compound adsorption material to make phosphorus stick to the phosphorus compound adsorption material, a drug solution for desorption is supplied to the adsorption tower, and phosphorus is desorbed in liquid and is recovered.Type: GrantFiled: March 18, 2009Date of Patent: March 8, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Hidetake Shiire, Nobuyuki Ashikaga, Satoshi Haraguchi, Tokusuke Hayami, Tatsuoki Kono, Akiko Suzuki, Shinetsu Fujieda, Katsuya Yamamoto
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Patent number: 7892435Abstract: Systems and methods are disclosed that promote the remediation of contaminated materials that are produced during industrial processes. These systems and methods include heating a material, transferring heat from the material to an industrial process. During this transfer, contaminants may be introduced into the material. These methods may remove the contaminant by treating the material with a surface modified nanoceramic through nanofiltration and/or active sites adsorption/reaction. The surface modified nanoceramic may remove at least part of the contaminant in the material. No cooling required prior to removing the contaminant from the material, which can lead to great energy saving and pollution reduction.Type: GrantFiled: May 21, 2008Date of Patent: February 22, 2011Assignee: Honeywell International Inc.Inventors: Tao Pan, Weijun-William Wang, Linan Zhao, Hongda Li
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Publication number: 20110036772Abstract: A process for removing phosphorus from wastewater wherein an iron or aluminum salt is added to the wastewater. The iron or aluminum salt results in the precipitation of certain iron or aluminum species that include phosphorus adsorption sites. These iron or phosphorus species are settled and become a part of sludge produced in the course of the wastewater treatment process. By recycling substantial portions of the sludge, the concentration of these iron or aluminum species in the wastewater is increased. This increased concentration results in the presence of large quantities of unused phosphorus adsorption sites that attract and adsorb phosphorus, resulting in phosphorus being removed from the wastewater.Type: ApplicationFiled: October 26, 2010Publication date: February 17, 2011Applicant: I. KRUGER INC.Inventors: Kashi Banerjee, Charles D. Blumenschein, John Charles Schrader
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Publication number: 20110023715Abstract: A method or process for treating wastewater containing high organics, silica, boron, hardness, and suspended and dissolved solids. The method includes degasifying the wastewater for the removal of dissolved gases and thereafter chemically softening the wastewater. After the chemical softening step, the wastewater is directed through a media filter or membrane which removes additional solids and precipitants. Thereafter the wastewater is directed through a sodium ion exchange that further softens the wastewater. The effluent from the ion exchange is directed through a cartridge filter and the effluent from the cartridge filter is directed through one or more reverse osmosis units. At a selected phase of the process, prior to the wastewater reaching the reverse osmosis unit or units, the pH of the wastewater is raised and maintained such that the pH of the wastewater reaching a reverse osmosis unit is at a pH greater than 10.5.Type: ApplicationFiled: October 14, 2010Publication date: February 3, 2011Applicant: VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORTInventor: LNSP Nagghappan
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Patent number: 7850854Abstract: A method and apparatus for adsorbing perchlorate in a fluid and successively destroying it. Perchlorate in the fluid is removed by adsorption on an adsorbent in a column. The adsorbent is then regenerated by desorbing perchlorate, and the perchlorate in the regenerant is then chemically destroyed.Type: GrantFiled: November 6, 2007Date of Patent: December 14, 2010Assignee: PURE O TECH, Inc.Inventors: Mirat D. Gurol, Vladimir Zlotopolski
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Patent number: 7815804Abstract: A method or process for treating wastewater containing high organics, silica, boron, hardness, and suspended and dissolved solids. The method includes degasifying the wastewater for the removal of dissolved gases and thereafter chemically softening the wastewater. After the chemical softening step, the wastewater is directed through a media filter or membrane which removes additional solids and precipitants. Thereafter the wastewater is directed through a sodium ion exchange that further softens the wastewater. The effluent from the ion exchange is directed through a cartridge filter and the effluent from the cartridge filter is directed through one or more reverse osmosis units. At a selected phase of the process, prior to the wastewater reaching the reverse osmosis unit or units, the pH of the wastewater is raised and maintained such that the pH of the wastewater reaching a reverse osmosis unit is at a pH greater than 10.5.Type: GrantFiled: December 12, 2006Date of Patent: October 19, 2010Assignee: OTV SA S.A.Inventor: LNSP Nagghappan
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Patent number: 7785474Abstract: The invention provides a method for contacting liquid with an ion exchange resin comprising introducing liquid into a process tank containing ion exchange resin at an inlet (2) and removing liquid that has been contacted with resin from the process tank at an outlet, the outlet being located above the inlet (2), the process tank including a resin containment region (7, 9) disposed between the inlet (2) and the outlet to impede the upward flow of the resin as it becomes entrained in the liquid flowing from the inlet to the outlet, and a contactor region for promoting contact between the resin and the liquid located below the containment region (7, 9), said containment region (7, 9) containing an array of settling members through which the liquid and resin upflow and which impede the flow of the resin to a sufficient extent that it is substantially contained within or below the containment region (7, 9). Apparatus for performing this method is also provided.Type: GrantFiled: December 15, 2005Date of Patent: August 31, 2010Assignee: Orica Australia Pty LtdInventors: Gregory Mark Vero, Colin Bruce Ritchie, Abigail Holmquist
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Publication number: 20100133195Abstract: The present invention relates to a process for reducing the amount of organic components in water, wherein a surface-reacted naturalcalcium carbonate and a hydrophobic adsorbent, selected from the group consisting of talc, hydrophobised calcium carbonate, hydrophobised bentonite, hydrophobised kaolinite, hydrophobised glass, or any mixture thereof, are brought into contact with the water to be purified, the surface-reacted natural calcium carbonate being the reaction product of a naturalcalcium carbonate with an acid and carbon dioxide, which is formed in situ by the acid treatment and/or supplied externally, and the surface-reacted natural calcium carbonate being prepared as an aqueous suspension having a pH of greater than 6.0, measured at 20° C.Type: ApplicationFiled: June 6, 2008Publication date: June 3, 2010Inventors: Patrick A. C. Gane, Joachim Schólkopf, Daniel Gantenbein
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Patent number: 7713416Abstract: A process for transforming sludge into NPK type granulated fertilizer in which the energy consume is reduced a 90% thanks to the addition of a special filtration step in which the water content is reduced a 50% and the remaining water is evaporated by the exothermic reaction occurring in the process. Additionally, the process of the present invention includes mechanisms that allow some of the by products generated by some of the reactions, to adsorb crystallization water and reduce the humidity of the mass without using external energy.Type: GrantFiled: August 25, 2006Date of Patent: May 11, 2010Assignee: Chemical Biosolids Inc.Inventor: José Cabello-Fuentes
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Patent number: 7713419Abstract: A method and construction for treatment of sludge from waterworks and wastewater treatment plants is disclosed. The method for treatment of sludge from waterwork or wastewater treatment plant, comprising precipitated inorganic chemical coagulants and precipitated organic substances, comprises adding an acid to the sludge in such a way that a first sludge mixture with low pH is received. The first sludge mixture includes the inorganic chemical coagulants in solution and the organic substances. The sludge mixture is pumped, via heat exchangers to a pressure tank. An obtained first concentrate is fed to at least one membrane filtration process in which a second concentrate and a first permeate are obtained.Type: GrantFiled: November 18, 2004Date of Patent: May 11, 2010Assignee: Feralco ABInventor: Hans David Ulmert
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Patent number: 7713423Abstract: In one embodiment, a reactive filtration method includes continuously regenerating a reactive filter media while simultaneously filtering contaminants from fluid flowing through the filter media. In one embodiment, regenerating the reactive filter media comprises mixing metal granules with the filter media and agitating the mixture. In another embodiment, regenerating the reactive filter media comprises introducing a metal in the fluid flowing through the filter media and agitating the filter media. In one embodiment, a method for removing phosphorus, arsenic or a heavy metal from water includes introducing a metal salt reagent into the water at a molar ratio of 5:1 to 200:1 to the phosphorous or the arsenic in the water and passing the water through a bed of moving sand.Type: GrantFiled: February 4, 2008Date of Patent: May 11, 2010Assignee: Idaho Research Foundation, Inc.Inventors: Gregory Moller, Kevin Marshall Brackney, Roger Alan Korus, Gerald Michael Keller, Jr., Brian Keith Hart, Remembrance Louisa Newcombe
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Patent number: 7704399Abstract: A system and method for the treatment of water for human consumption using a naturally occurring inorganic catalyst working within a pH range between 3 and 13, combining the inorganic catalyst at 3 parts per million to an oxidant, primarily hydrogen peroxide and a metal salt used as a coagulant and a primary catalyst, resulting in an efficient and economical phasic water purification and filtration system and process. The inorganic catalyst is a zeolite a synthetic zeolite or preferably chabazite.Type: GrantFiled: May 30, 2007Date of Patent: April 27, 2010Inventor: Randy Gene Condit
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Patent number: 7667061Abstract: The present invention is directed to a method of preparing compositions enriched in compounds containing carbon chains of varying degrees of unsaturation using argentation chromatography. The present method utilizes an argentized cationic resin or a conditioned argentized alumina to separate compounds containing saturated or mono-unsaturated carbon chains from compounds having polyunsaturated carbon chains present in a starting composition. The invention is particularly useful for preparing a composition enriched in polyunsaturated fatty acid alkyl esters from mixtures of fatty acid esters in a starting composition derived from vegetable oils. The present invention is also directed to a method of preparing a conditioned argentized alumina adsorbent having increased selectivity for compounds containing one or more polyunsaturated carbon chains.Type: GrantFiled: December 18, 2006Date of Patent: February 23, 2010Assignee: Archer-Daniels-Midland CompanyInventors: Thomas P. Binder, Doug Geier, Ahmad K. Hilaly, Robert Duane Sandage, John G. Soper
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Publication number: 20100025333Abstract: Conditioning processes and equipment for removing hardness from water circulated in a system. A sidestream is routed to a reactor and back. A buffer is added to the circulated water, in some embodiments in a sidestream exiting the reaction chamber, forming soluble metal complexes with metal ions of the type that cause scaling. A conditioner is added to the sidestream water which breaks the soluble metal ion-buffer complexes and precipitates and accumulates the released metal ion as a solid for accumulation and disposal. In some embodiments a polymer is added, a corrosion inhibitor blend is added and/or pre-mixed with the buffer, and a chlorine generator removes sodium chloride from the buffered sidestream, and makes chlorine gas, hydrogen gas, and sodium hydroxide for use in the process or for disposal.Type: ApplicationFiled: December 26, 2007Publication date: February 4, 2010Inventor: Samuel Rupert Owens
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Publication number: 20090288738Abstract: A method for recovering demineralized water from zirconium-containing rinse water having a pH lower than 6.0, wherein a) the rinse water has added to it an aqueous solution of Ca(OH)2 containing no more than 0.1 wt% undissolved Ca(OH)2, in a quantity such that the pH of the rinse water rises to a value in the range from 6.2 to 8.0, b) a precipitate that forms is separated from the rinse water, and c) the rinse water from which the precipitate was removed in step b) is subjected to an ion exchange method or to reverse osmosis.Type: ApplicationFiled: August 5, 2009Publication date: November 26, 2009Applicant: Henkel AG & Co. KGaAInventors: Jan-Willem Brouwer, Jens Krömer
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Patent number: 7601264Abstract: Embodiments herein provide waste abatement apparatuses and methods for treating waste solutions derived from depleted or used plating solutions, such as from an electroless deposition process or an electrochemical plating process. The waste abatement systems and processes may be used to treat the waste solutions by lowering the concentration of, if not completely removing, metal ions or reducing agents that are dissolved within the waste solution. In one embodiment of a demetallization process, a waste solution may be exposed to a heating element (e.g., copper coil) contained within an immersion tank. In another embodiment, the waste solution may be exposed to a catalyst having high surface area (e.g., steel wool or other metallic wool) within an immersion tank. In another embodiment, the waste solution may be flowed through a removable, catalytic conduit (e.g., copper tubing) having an internal catalytic surface.Type: GrantFiled: October 4, 2006Date of Patent: October 13, 2009Assignee: Applied Materials, Inc.Inventors: Josh H. Golden, Timothy Weidman, Peter Porshnev, Kalyan Sista, Nikhil Krishnan
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Patent number: 7540965Abstract: A process for removing DOC (dissolved organic carbon) from a concentrated salt solution containing DOC by contacting the salt solution with a coagulant/flocculant such that the DOC becomes insoluble and removing the insoluble DOC from the salt solution.Type: GrantFiled: April 2, 2004Date of Patent: June 2, 2009Assignee: Orica Australia Pty LtdInventors: Arup K. Sengupta, Ping Li, Brendan J. Murray, Stuart D. Harrison, Gregory M. Vero
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Patent number: 7491336Abstract: In a process for treating effluent water, a stream of effluent water is fed to a porous ceramic media filled reactor. Organic and inorganic impurities are absorbed and/or oxidized from the effluent water into the media and/or off-gases. The remainder of the effluent water stream is dispensed from the reactor in an outlet stream suitable for direct discharge to the sea or for recycling without incurring the disadvantages of generating a solid sludge. The reactor includes a chamber containing activated media, such as pellets of porous ceramic material. The pellets are stored in a vertical stacks of sub chambers defined by horizontal perforated trays and/or in a horizontal chains of sub chambers defined by vertical perforated baffles.Type: GrantFiled: November 1, 2006Date of Patent: February 17, 2009Assignee: Rimkus Consulting Group, Inc.Inventors: Gary W. Markham, Harmon L. Kirkpatrick, Rick Guercio, Douglas E. Mast, Stanley C. Gustas, Jr.
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Publication number: 20080314830Abstract: A process for removing phosphorus from wastewater wherein an iron or aluminum salt is added to the wastewater. The iron or aluminum salt results in the precipitation of certain iron or aluminum species that include phosphorus adsorption sites. These iron or phosphorus species are settled and become a part of sludge produced in the course of the wastewater treatment process. By recycling substantial portions of the sludge, the concentration of these iron or aluminum species in the wastewater is increased. This increased concentration results in the presence of large quantities of unused phosphorus adsorption sites that attract and adsorb phosphorus, resulting in phosphorus being removed from the wastewater.Type: ApplicationFiled: June 22, 2007Publication date: December 25, 2008Applicant: I. KRUGER INC.Inventors: Kashi Banerjee, Charles D. Blumenschein, John Charles Schrader
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Patent number: 7459086Abstract: 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 oxidants and without requiring a complex procedure for preparing the filtering material. The described method treats the water by passing the water through at least one bed of filter material, where the filter material comprises an association of manganese dioxide grains and at least one iron-based divided material in the hydroxide, oxide, or metallic state. The association may comprise a mixture of the iron-based divided material and the manganese dioxide grains. Alternatively, the association may comprise a superposition of layers of the iron-based divided material and the manganese dioxide grains.Type: GrantFiled: April 30, 2003Date of Patent: December 2, 2008Assignee: OTV SA S.A.Inventor: Abdelkader Gaid
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Patent number: 7445718Abstract: A method of removing arsenic and heavy metals from water using metal salt hydroxidegels is provided. The arsenic present in water is adsorbed onto the hydroxide-gels which can effectively be filtered through a diatomaceous earth (DE) filtration bed. The combination of DE mixed hydroxide-gels is also effective in removing arsenic from water and heavy metals from water.Type: GrantFiled: April 10, 2003Date of Patent: November 4, 2008Assignees: The Board of Regents of the Nevada Systems of Higher Education on behalf of the University of Nevada, Reno, EP Minerals, LLCInventors: Manoranjan Misra, Peter Lenz
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Patent number: 7429330Abstract: A method and recyclable magnetic adsorbent are provided for removing contaminants from a fluid stream that has by-products. The method includes providing an adsorbent material that has incorporated at least one ferromagnetic material. Contacting the ferromagnetic adsorbent material to at least a portion of contaminated stream to adsorb the contaminant. The contaminated adsorbent is then separated from the by-products using a magnetic separation process. The adsorbent is recovered from the solid by-products and reusable in the present method.Type: GrantFiled: December 16, 2004Date of Patent: September 30, 2008Assignee: Calgon Carbon CorporationInventors: Toan Phan Vo, K. Raman Venkatesh
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Publication number: 20080217234Abstract: There is disclosed a device for treating fluorine-containing water in which for-treatment water can be treated so as to set a fluorine concentration to a drainage standard or less without adding a reagent such as a pH adjuster to change a pH of the for-treatment water if possible. A treatment device includes a first treatment means for adding, to fluorine-containing for-treatment water, a reactive compound which reacts with fluorine to form a fluoride and which does not apply an OH group, so that a suspension is formed; a second treatment means for separating the suspension obtained by the first treatment means into a solid and a liquid; and a third treatment means for bringing a permeation liquid separated by the second treatment means into contact with a fluoride ion adsorbent.Type: ApplicationFiled: March 7, 2008Publication date: September 11, 2008Inventors: Yasuteru Sumida, Yasuyuki Kuwaki, Hiroyuki Umezawa
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Patent number: 7374687Abstract: A decolorization treatment method in which not only can a liquid that has been obtained by treating raw water that is stock-raising treatment water in a purifier tank be decolorized swiftly with simple equipment, but moreover the treatment water can be purified to an extent that reuse as a washing liquid or the like is possible. The method of decolorizing stock-raising treatment water comprises adding ferric polysulfate and a nonionic or anionic organic coagulant to a filtrate that has been obtained by treating raw water that is stock-raising treatment water in a purifier tank, and agitating the obtained product to bring about reaction and thus separate into solid and liquid components, and removing the solid component. Preferably, a two-stage reaction is carried out in which the ferric polysulfate is added and agitation is carried out to bring about reaction, and then the nonionic or anionic organic coagulant is added thereafter.Type: GrantFiled: July 12, 2005Date of Patent: May 20, 2008Assignee: IK Shoji Co., Ltd.Inventor: Isamu Kobayashi
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Patent number: 7326346Abstract: The present invention is directed to a sorbent comprising a disordered polyvalent metal oxide on the surface of an inert substrate. The substrate can be a layered silicate, such as vermiculite, an aluminosilicate such as montmorillonite, or a nonlayered silicate such as a zeolite. The sorbent removes ionic contaminants, such as arsenic, from process streams.Type: GrantFiled: September 1, 2006Date of Patent: February 5, 2008Assignee: ADA Technologies, Inc.Inventors: John Stanley Lovell, Thomas E. Broderick, Craig S. Turchi, Amanda K. Kimball
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Patent number: 7300589Abstract: 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 the arsenic in the +5 oxidation state from the aqueous phase, normally by contacting the treated feed with alumina or other precipitating agent containing cations in the +3 oxidation state.Type: GrantFiled: May 16, 2006Date of Patent: November 27, 2007Assignee: Union Oil Company of CaliforniaInventors: Richard Donald Witham, Edward Bayer McNew, John Leslie Burba, III
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Patent number: 7141173Abstract: The present invention provides a process for enhancing the metal contaminant sorption capacity of mineral compounds within a groundwater-bearing formation by manipulating the pH and the surface acidity of the mineral compounds. The process is useful in removing metal contaminants from groundwater within a groundwater-bearing formation, providing a backstop treatment for groundwater after previous water treatment, and for protection of water sources, for example well-head protection.Type: GrantFiled: February 12, 2004Date of Patent: November 28, 2006Inventor: Craig M. Bethke
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Patent number: 7083964Abstract: The invention relates to a method for purifying at least one enzyme obtained in an excess fermentation of Clostridium histolyticum. It is provided for that the enzymes of the excess fermentation are separated by a multistage chromatography method by exclusively using chromatography materials on styrene/divinyl-benzene base and/or on base of in particular ceramic hydroxylapatite.Type: GrantFiled: June 1, 2002Date of Patent: August 1, 2006Assignee: Nordmark Arzneimittel GmbH & Co. KGInventors: Manfred Kurfürst, Stefan Schmidbauer
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Patent number: 7077963Abstract: The invention provides compositions comprising bauxite refinery residues that have been reacted with sufficient calcium and magnesium ions that they have a reaction pH of less than 10.5, and one or more water treating additives. The invention also provides processes for treatment of water containing dissolved inorganic substances involving stepwise treatment of the water in which the reacted bauxite refinery residues are added after the addition of a pH-raising additive. The invention also provides processes for treatment of water containing dissolved inorganic substances in which the reacted bauxite refinery residues are added stepwise, with one or more water treating additives also being added in at least one of the steps.Type: GrantFiled: October 26, 2001Date of Patent: July 18, 2006Assignee: Nauveau Technology InvestmentsInventors: David M McConchie, Malcolm William Clark, Fiona Gaye Davies-McConchie
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Patent number: 7063804Abstract: Compositions including alum and a smectite mineral material for the clarification of bodies of water by removal of dissolved solids, dissolved organic materials and other anions such as fluoride and chloride as well as the removal of total phosphorus from such bodies of water.Type: GrantFiled: October 7, 2004Date of Patent: June 20, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Charles R. Landis, Steven Reed Gray
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Patent number: 7033507Abstract: A method for removing metal contaminants from acidic mine wastewater using lignin derivatives, such as lignosulfonates and kraft lignin, an alkali coagulant, such as a lime compound, and an alkaline composition for increasing the pH. The lignin derivatives are dispersed in the wastewater and the coagulant is added, increasing the pH to about 4.5–8.5 and causing the formation of a floc. The alkaline composition is then added to bring the pH to about 9 to 10, causing the further formation of a floc. Optionally, air oxidation is carried out, reducing the pH to about 8.1–8.6. Optionally, a ferric or ferrous salt may also be added. The flocs comprise metal-lignin colloids, metal hydroxides and metal salts. The flocs coagulate to form a sludge. Optionally, fly ash or diatomaceous earth may be added to increase the density and stability of the sludge. The sludge that is formed contains the metals and is separated from the treated water by filtration.Type: GrantFiled: November 15, 2002Date of Patent: April 25, 2006Assignee: Noram Engineering and Constructors Ltd.Inventor: J. Ming Zhuang
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Patent number: 7008543Abstract: A method of oxidation or pathogen inactivation in water supplies using the combination of treatments of chlorine dioxide and ozone in the sequential steps prior to filtration and distribution. Results indicate that the addition of chlorine dioxide before prezonation reduces the bromate formation and chlorine dioxide can be substituted for preoxidation with ozone, while maintaining the enhanced filtration effects observed from the presence of a preoxidant. A majority of the chlorite formed from reactions of chlorine dioxide with constituents in raw water are converted to chlorate by the following ozonation step.Type: GrantFiled: April 14, 2003Date of Patent: March 7, 2006Assignee: Contra Costa Water DistrictInventors: Dale Darrow Newkirk, Xuejun Zhou, Jeffrey John Neemann
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Patent number: 6960303Abstract: Compositions including pellets of alum, a smectite mineral material and optionally sodium or calcium carbonate that can be delivered to a phosphate impoundment located at the bottom of a body of water at the bottom. The pellets of alum, smectite mineral material and optionally sodium or calcium carbonate are dropped through the body of water so that the alum is released when the pellet reaches the bottom of the impoundment thereby treating the phosphates.Type: GrantFiled: June 24, 2004Date of Patent: November 1, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Charles R. Landis, Danny Oaks, Ricky P. Rothermel, Robert A. Harvey, Steven Reed Gray
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Patent number: 6916426Abstract: A method of treating an animal waste slurry so as to efficiently extract nutrients, and which can be performed in a zero-discharge system, comprises flocculating the slurry, processing, e.g. filtering, the flocculated slurry to separate liquid from solid material, drying the solid material, processing the liquid to extract ammonium, phosphorous and potassium from the slurry, all within 24 hours, and preferably on average within 12 hours, of production of the waste material by animals. Since the urates of potassium and ammonium in the slurry take a few hours to break down, they remain in crystalline form and therefore a larger portion of the total amount of potassium and ammonium in the slurry can be extracted.Type: GrantFiled: April 11, 2002Date of Patent: July 12, 2005Assignee: ATD Waste Systems Inc.Inventors: Victor Van Slyke, Hubert Timmenga, Steve Helle, Paul Watkinson, Xiaotao Bi
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Patent number: 6893570Abstract: The slag-only Vertical Flow Pond, which we have developed, is a passive treatment component capable of removing large concentrations of metals, especially manganese, from water to extremely low concentrations while neutralizing acidity and producing alkalinity. An improvement to this design is the Hybrid Flow Pond (HFP), which is a passive treatment system component that consists of an open, pond-like structure utilizing a horizontal operational flow path (or a vertical flow path if desired) with a vertical flush flow path. By creating flushing flow paths generally perpendicular to operational flow paths, the development of preferential flow paths that encourage short circuiting can be prevented. Additional head can be generated prior to flushing by adjusting the water level in the pond. Although any treatment media can be used with this system, the use of basic steel slag is particularly useful in the removal of metals, especially manganese from aqueous solutions.Type: GrantFiled: January 23, 2003Date of Patent: May 17, 2005Inventors: Gene T. Hilton, Jr., Timothy P. Danehy, Margaret Hensley Dunn, Clifford F. Denholm, IV, Shaun L. Busler
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Patent number: 6881346Abstract: Compositions including alum, a smectite material and optionally one or more of a buffer and an algaecide coating or additives for the clarification of bodies of water by removal of dissolved solids, dissolved organic materials and other anions such as fluoride and chloride as well as the removal of total phosphorus from such bodies of water. The compositions are designed to be delivered to concentrated or impounded phosphorus located at the bottom of various bodies of water and may be produced in various physical forms.Type: GrantFiled: October 23, 2002Date of Patent: April 19, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Charles R. Landis, Steven R. Gray
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Patent number: 6863825Abstract: 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 the arsenic in the +5 oxidation state from the aqueous phase, normally by contacting the treated feed with alumina or other precipitating agent containing cations in the +3 oxidation state.Type: GrantFiled: January 29, 2003Date of Patent: March 8, 2005Assignee: Union Oil Company of CaliforniaInventors: Richard Donald Witham, Edward Bayer McNew, John Leslie Burba, III
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Patent number: 6849186Abstract: Buoyant, sphere-like materials on the order of about 10 to about 300 microns and surrounded, at least in part, by (1) a variable blend of a ferromagnetic and paramagnetic material and (2) an absorbing or adsorbing material are effective vehicles for isolating targeted materials. By virtue of its relatively low density, the composite material is capable of remaining sufficiently suspended in solution for a suitable amount of time. In addition, the blend of ferromagnetic and paramagnetic materials allows for the isolation of a composite material from an environment such as a solution, yet discourages substantial self-attachment of the composite materials in solution, when subject to a magnetic field. Accordingly, multiple embodiments of composite materials having these and other properties are disclosed, as well as methods for making and using the same.Type: GrantFiled: October 24, 2001Date of Patent: February 1, 2005Assignee: Phillips Plastic CorporationInventors: James R. Johnson, Majid Entezarian
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Patent number: 6846416Abstract: The invention relates to a process for treating a chromate waste liquid containing an organic acid component. This process includes (a) adding a chromium precipitation accelerating agent containing at least one of a calcium component and a magnesium component, to the chromate waste liquid; and (b) adjusting the chromate waste liquid to having a first pH of 9 or higher, thereby precipitating a chromium component from the chromate waste liquid and thereby reducing a concentration of a dissolved chromium component of the chromate waste liquid.Type: GrantFiled: July 30, 2001Date of Patent: January 25, 2005Assignee: NGK Spark Plug Co., Ltd.Inventors: Hiroaki Nasu, Wataru Matsutani
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Patent number: 6821434Abstract: Systems for removing arsenic from water by addition of inexpensive and commonly available magnesium oxide, magnesium hydroxide, calcium oxide, or calcium hydroxide to the water. The hydroxide has a strong chemical affinity for arsenic and rapidly adsorbs arsenic, even in the presence of carbonate in the water. Simple and commercially available mechanical systems for removal of magnesium hydroxide particles with adsorbed arsenic from drinking water can be used, including filtration, dissolved air flotation, vortex separation, or centrifugal separation. A system for continuous removal of arsenic from water is provided. Also provided is a system for concentrating arsenic in a water sample to facilitate quantification of arsenic, by means of magnesium or calcium hydroxide adsorption.Type: GrantFiled: December 19, 2001Date of Patent: November 23, 2004Assignee: Sandia CorporationInventors: Robert C. Moore, D. Richard Anderson
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Patent number: 6767468Abstract: A process for removing uranium/vanadium-based contaminants from groundwater using a primary in-ground treatment media and a pretreatment media that chemically adjusts the groundwater contaminant to provide for optimum treatment by the primary treatment media.Type: GrantFiled: July 31, 2002Date of Patent: July 27, 2004Assignee: The United States of America as represented by the United States Department of EnergyInventors: Donald R. Metzler, Stanley Morrison
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Patent number: 6755973Abstract: A process and system for removing animal processing contaminants and fats, oils, and greases from large volume quantities of waste water. In the process, a waste water stream containing the contaminants is treated with a chemical oxidant, polymer compound and coagulant to create a particle having a diameter greater than 50 microns. Treated waste water is passed through a microfiltration membrane which physically separates the contaminant particle from the waste water. Commercially available microfiltration membranes having a pore size in the range of 0.5 micron to 10 microns may be used. The treated waste water flow rate through the microfiltration membranes can range from at least 200 gallons per square foot of membrane per day (“GFD”) to in excess of 750 GFD. Solids are removed from the membrane surface by periodically backflushing the microfiltration membranes and draining the filtration vessel within which the membranes are located.Type: GrantFiled: April 4, 2002Date of Patent: June 29, 2004Assignee: Water Solutions Inc.Inventor: Stephen Donald Allen
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Patent number: 6669848Abstract: The invention provides processes for treating commercial grade preservatives to remove the off-flavor and/or off-odor from the preservatives. The processes involve preparing a solution by dissolving the preservative in a suitable solvent, such as water or methanol or mixtures thereof. The preservative solution is then passed through a filter to separate and remove organic acid impurities from the preservative. The undesirable tastes and odors, principally caused by the organic acid impurities, are retained in the filter while the preservative passes through the filter. In one embodiment, the filter is a bed of anion exchange resin that reacts with and removes the organic acid impurities. In another embodiment, the filter contains a metal cation that converts the organic acid impurities into insoluble salts which remain in the filter. The solvent can be removed by evaporation after the preservative solution is passed through the filter.Type: GrantFiled: January 31, 2003Date of Patent: December 30, 2003Assignee: Tillin, Inc.Inventors: Dale F. Kuhn, Bruce E. Plashko
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Patent number: 6656587Abstract: Buoyant, sphere-like materials on the order of about 10 to about 300 microns and surrounded, at least in part, by (1) a variable blend of a ferromagnetic and paramagnetic material and (2) an absorbing or adsorbing material are effective vehicles for isolating targeted materials. By virtue of its relatively low density, the composite material is capable of remaining sufficiently suspended in solution for a suitable amount of time. In addition, the blend of ferromagnetic and paramagnetic materials allows for the isolation of a composite material from an environment such as a solution, yet discourages substantial self-attachment of the composite materials in solution, when subject to a magnetic field. Accordingly, multiple embodiments of composite materials having these and other properties are disclosed, as well as methods for making and using the same.Type: GrantFiled: May 2, 2001Date of Patent: December 2, 2003Assignee: Phillips Plastics CorporationInventors: James R. Johnson, Majid Entezarian
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Patent number: 6653396Abstract: Zeolites of type A wherein all the cationic sites of which occupied by sodium, calcium and/or magnesium, potassium and hydronium cations, which exhibit the advantage of having a water adsorption capacity≧23%, which do not adsorb and therefore cannot desorb nitrogen, and which, incorporated in polyurethane (PU) resins, make it possible to increase the potlife of the PU formulations in which they are incorporated. Such zeolites are prepared by a process comprising bringing into contact an aqueous suspension of zeolite 3A, 4A or 5A, an aqueous solution of calcium or potassium salt(s) or solutions of calcium and potassium salt(s), and an acid solution, simultaneously or otherwise and in any order; and in then filtering off and washing the solid obtained, and then drying and activating the zeolite.Type: GrantFiled: January 11, 2002Date of Patent: November 25, 2003Assignee: CECA S.A.Inventors: Serge Nicolas, Paul-Guillaume Schmitt
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Patent number: 6589427Abstract: This invention relates to a process for treating an effluent comprising a mixture of spent wash and black liquor, said process comprising mixing the effluent with a flocculating agent consisting of a mixture of salts of Group III and transition metals, mixture of natural earth's along with an oxide of alkaline earth metal followed by treating with a combination of ion exchange resins.Type: GrantFiled: February 28, 2001Date of Patent: July 8, 2003Assignee: Council of Scientific & Industrial ResearchInventors: Pramod Prabhakar Moghe, Vinita Vinay Panchanadikar, Ashwini Vinayak Pol, Ajit Ramesh Joshi, Prakash Kondiba Bahirat, Priyadarshini Kudlu, Shekhar Prakash Bahirat
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Patent number: 6565753Abstract: In the purification of deicing fluid for recovery of glycol, initially solid particles are separated, then dissolved organic compounds and positive and negative ions are separated by an ion exchange in an ion exchanger, and finally water is separated by distillation.Type: GrantFiled: June 27, 2000Date of Patent: May 20, 2003Assignee: De-Icing, Inc.Inventors: Allan Holmgren, Peter Mattsson
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Patent number: 6551514Abstract: Methods for rendering a cyanide or cyanide-containing compound substantially insoluble in an aqueous solution or suspension of cyanide-containing materials comprising: mixing a reagent comprising a thiosulfate salt with said solution or suspension; and adding to said material a complexing agent selected from the group consisting of divalent copper salts, divalent iron salts, divalent cobalt salts, activated carbon and mixtures of the foregoing are provided.Type: GrantFiled: October 27, 2000Date of Patent: April 22, 2003Assignee: The Board of Regents of the University and Community College System of NevadaInventors: Manoranjan Misra, Gautam Priyadarshan, Birendra Kumar Jena
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Patent number: 6461535Abstract: The present invention provides a process for removing arsenic from ground water to be processed and used in remote dwellings. The process includes (a) contacting a clay, a coagulant, and an oxidizer with water containing arsenic to form a coagulated colloidal mixture; (b) adsorbing the arsenic onto the coagulated colloidal mixture; and (c) separating the water from the coagulated colloidal mixture. The invention also provides a composition ready for use in removing arsenic from ground water to be used in remote areas. The composition includes an activated clay, a coagulant, and an oxidizer in predetermined proportions for efficient removal of arsenic from ground water.Type: GrantFiled: December 3, 1999Date of Patent: October 8, 2002Assignee: Pan American Health OrganizationInventor: María Luisa Castro de Esparza
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Patent number: 6375850Abstract: A method for removing accumulated metals from a cleaning solution is provided. After removal of the metals, the cleaning solution can be discharged or recycled. The process manipulates the pH levels of the solution as a means of precipitating solids. Preferably a dual phase separation at two different pH levels is utilized.Type: GrantFiled: January 21, 1999Date of Patent: April 23, 2002Assignee: United States Enrichment Corp.Inventor: Lewis E. Deacon