Including Oxidation Patents (Class 210/721)
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Patent number: 11780753Abstract: Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water can be concentrated and prepared for destruction in a pretreatment phase. Following annihilation of the PFAS in supercritical conditions to levels below 5 parts per trillion (ppt), the water effluent can be used to recover heat, returned to sub-critical conditions, and then released back into the environment.Type: GrantFiled: July 23, 2022Date of Patent: October 10, 2023Assignee: REVIVE ENVIRONMENTAL TECHNOLOGY, LLCInventors: Lindy E. Dejarme, Kavitha Dasu, Russel R. Sirabian, Jeffrey Ellis, Dan Garbark, Nathan Bryant, John Tallarico, Joseph Casciano, Slawomir Winecki, David Holley, Joshua James, Keith Brown, Doug Hendry, Darwin Argumedo, Aaron Frank, Christopher Gordon Scheitlin, Michael M. Miller, Matthew Vaughan
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Patent number: 11746696Abstract: A chemical looping combustion (CLC) based power generation, particularly using liquid fuel, ensures substantially complete fuel combustion and provides electrical efficiency without exposing metal oxide based oxygen carrier to high temperature redox process. An integrated fuel gasification (reforming)-CLC-followed by power generation model is provided involving (i) a gasification island, (ii) CLC island, (iii) heat recovery unit, and (iv) power generation system. To improve electrical efficiency, a fraction of the gasified fuel may be directly fed, or bypass the CLC, to a combustor upstream of one or more gas turbines. This splitting approach ensures higher temperature (efficiency) in the gas turbine inlet. The inert mass ratio, air flow rate to the oxidation reactor, and pressure of the system may be tailored to affect the performance of the integrated CLC system and process.Type: GrantFiled: October 20, 2022Date of Patent: September 5, 2023Assignee: King Fahd University of Petroleum and MineralsInventors: Mohammed Mozahar Hossain, Muflih Arisa Adnan
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Patent number: 11661366Abstract: Water containing selenium, for example flue gas desulfurization (FGD) blowdown water is treated with a combination of biological and chemical treatment and membrane filtration. The biologically treated water is dosed with a dithiocarbamate compound and flocculated prior to membrane filtration. Optionally, the treatment may be enhanced with one or more adsorptive agents prior to, or in conjunction with, membrane filtration. Membrane concentrate may be re-circulated to one or more biological treatment zones. The biological treatment may be by way of suspended growth, fixed growth on a moving bed, or both. One or more biological treatment zones may be controlled considering their oxygen reduction potential (ORP). Optionally, the biological treatment includes an aerobic zone following one or more anoxic or anaerobic zones. The non-aerobic zones remove selenium and optionally nitrogen and sulfur. The aerobic zone removes carbon, which may include carbon added as a nutrient in a non-aerobic zone.Type: GrantFiled: June 30, 2016Date of Patent: May 30, 2023Inventor: Wajahat Hussain Syed
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Patent number: 11447405Abstract: A method and apparatus are provided for removing EPA regulated chemical species from industrial wastewater using green rust. The apparatus includes a green rust generator having an iron anode and a carbon cathode.Type: GrantFiled: May 15, 2020Date of Patent: September 20, 2022Assignee: University of Kentucky Research FoundationInventors: Xin Gao, Kunlei Liu, James R. Landon, Jesse Thompson, Ayokunle O. Omosebi, Keemia Abad, Zilong Ma
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Patent number: 11427487Abstract: Compositions and methods for treating waste water produced by copper mining operations are described herein. Slag from steel making operations and other industrial waste materials that include alkali metal and/or alkaline earth elements have been found to both raise pH of the waste water and also reduce arsenic content. Following such treatment the spent slag or industrial waste can be utilized as a source of valuable metals or incorporated into stabilized building materials.Type: GrantFiled: May 9, 2019Date of Patent: August 30, 2022Assignee: Lixivia, Inc.Inventor: Michael D. Wyrsta
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Patent number: 11242492Abstract: The present embodiments generally relate to methods for the treatment of tailings, e.g., oil sands tailings, including methods comprising the use of one or more flocculants, one or more coagulants and one or more oxidants to treat said tailings and/or to improve the performance of said one or more flocculants.Type: GrantFiled: June 12, 2019Date of Patent: February 8, 2022Assignee: KEMIRA OYJInventors: Miguel Pelaez, Thomas Fenderson
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Patent number: 11242271Abstract: A system for treating metal-contaminated wastewater includes a primary treatment sub-system, a secondary treatment sub-system, and a tertiary treatment sub-system. The tertiary treatment sub-system includes a reactor tank, a source of ballast material, a source of coagulant, a solids-liquid separator, and a controller configured to recycle ballasted solids from the solids-liquid separator to the reactor tank an amount sufficient to generate metal hydroxide floc in the reactor tank to reduce a concentration of dissolved metal in the reactor tank.Type: GrantFiled: June 5, 2017Date of Patent: February 8, 2022Assignee: Evoqua Water Technologies LLCInventors: Rohan Wikramanayake, Raymond G. Pepin, Thomas Miles
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Patent number: 11235994Abstract: Methods and systems for reducing the concentration of selenocyanate in water. In the methods and systems, water containing selenocyanate is treated an oxidant to provide oxidant-treated water, which is then contacted with a zero-valent iron treatment system comprising (a) a reactive solid comprising zero-valent iron and one or more iron oxide minerals in contact therewith and (b) ferrous iron.Type: GrantFiled: October 20, 2016Date of Patent: February 1, 2022Assignee: The Texas A & M University SystemInventor: Yongheng Huang
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Patent number: 11123701Abstract: A process including introducing, into a device, an aqueous fluid containing at least one inorganic salt, the water of the aqueous fluid being in supercritical conditions or close to the supercritical range in the device, and measuring the concentration or the amount of inorganic salt in the device, this measurement preferably being carried out before the entry of the inorganic salt into the device, Then bringing the inorganic salt into contact with an aqueous flow containing at least one hydroxide salt to obtain in the device an aqueous fluid mixture containing an inorganic salt and a hydroxide salt and adjusting the concentration or amount of the hydroxide salt as a function of the concentration or amount of the inorganic salt needed to at least partially solubilize the inorganic salt. Preferably the measurement of the concentration or the amount of inorganic salt leaving the device is also performed.Type: GrantFiled: November 16, 2018Date of Patent: September 21, 2021Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE NAT SUPERIEURE ARTS ET METIERS ENSAM, UNIVERSITÉ DE BORDEAUX, INSTITUT POLYTECHNIQUE DE BORDEAUXInventor: Cyril Aymonier
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Patent number: 11084743Abstract: Methods and systems for reducing the concentration of selenium species in water, particularly water containing recalcitrant selenium species. In the methods and systems, water containing one or more selenium species is treated with permanganate to provide permanganate-treated water, which is then contacted with a zero-valent iron treatment system comprising (a) a reactive solid comprising zero-valent iron and one or more iron oxide minerals in contact therewith and (b) ferrous iron.Type: GrantFiled: October 20, 2016Date of Patent: August 10, 2021Assignee: Texas A&M University SystemInventor: Yongheng Huang
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Patent number: 11066313Abstract: Methods are disclosed for treating water containing a target anion to remove the target anion. The methods can include preparing a treatment composition solution that contains a metal treatment agent, adjusting the treatment composition solution to a first pH that is alkaline and then to a second pH that is acidic, and contacting the treatment composition solution with the water that contains the target anion.Type: GrantFiled: February 3, 2020Date of Patent: July 20, 2021Assignee: CHEMTREAT, INC.Inventors: Vladimir Djukanovic, Nicholas Seymour, William Henderson, Oleh Weres
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Patent number: 10934190Abstract: When treating an aqueous stream containing metal ions, the pH is often raised to remove at least a portion of the metal ions. The presence of a multiplicity of metal ions with interfering chemistries and/or varying concentrations can make the pH rise difficult to predict for a given amount of base. Accordingly, water treatment processes can comprise: providing an acidic aqueous stream comprising one or more metal ions; adding a base to the aqueous stream and increasing its pH to a first pH value; after adding the base and increasing the pH, adding an alkaline source of hypochlorous acid to the aqueous stream and further increasing its pH to a second pH value, the second pH value being about 7 or above; and removing at least a portion of the metal ions from the aqueous stream after adding the base and the alkaline source of hypochlorous acid.Type: GrantFiled: December 12, 2014Date of Patent: March 2, 2021Assignee: Halliburton Energy Services, Inc.Inventors: Shantel J. Stone, Charles R. Landis
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Patent number: 10711201Abstract: The invention relates to methods for converting algal biomass into a gas or into biocrude comprising (a) gasification or hydrothermal liquefaction of an algal biomass in at least one first reactor, (b) separation of the gas or biocrude produced thereby from the aqueous effluents and the CO2 produced, at the outlet of the first reactor, (c) recovery of the aqueous effluents, and (d) oxidation of the aqueous effluents in at least one second reactor. Continuous processes for culture of algal biomass and conversion of the algal biomass cultivated into a gas or into a biocrude are also disclosed.Type: GrantFiled: December 21, 2015Date of Patent: July 14, 2020Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVESInventors: Jonathan Texier, Pierre Castelli, Anne Roubaud
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Patent number: 10654739Abstract: Methods and systems including processing dredge spoils to reclaim soil therefrom. The techniques may include a feed system for receiving dredge spoils, a dewatering system for removing water from the dredge spoils, and a grinder/mixer for grinding the dredge spoils from the dewatering system while mixing the dredge spoils with one or more additional materials.Type: GrantFiled: August 21, 2015Date of Patent: May 19, 2020Assignee: Dredge Spoils Reclamation, LLCInventor: Patrick D. Wade
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Patent number: 10526217Abstract: The present application discloses a method for producing acrylate with low pollutant discharge. The method has the advantages of high raw material utilization efficiency, low concentration, low salinity and low toxicity of wastewater pollutant, easy treatment of wastewater and etc.Type: GrantFiled: April 21, 2017Date of Patent: January 7, 2020Assignee: CHINESE RESEARCH ACADEMY OF ENVIRONMENTAL SCIENCESInventors: Yuexi Zhou, Yudong Song
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Patent number: 9873624Abstract: A process of removing selenocyanate from an aqueous medium contaminated with at least selenocyanate. In the presence of UV light and TiO2 as a photocatalyst, selenocyanate is initially photolyzed to release Se(0). Se(0) is then oxidized to Se(IV) and finally Se(VI) by free radicals generated by the photocatalyst. After the oxidation is complete, a hole scavenger is added and mixed with the aqueous medium to trigger the reduction of Se(VI) to Se(0).Type: GrantFiled: April 23, 2015Date of Patent: January 23, 2018Assignee: King Fahd University of Petroleum and MineralsInventor: Muhammad Shariq Vohra
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Patent number: 9701554Abstract: An aeration control valve system may be used with a water treatment system to control aeration and flow of water in accordance with various operating cycles. The aeration control valve system causes air to be pumped or drawn into the water treatment system during an air charge cycle to provide an air charge for aerating the water to facilitate water treatment. The aeration control valve system releases the air during an air release cycle without requiring a backwash cycle. In one embodiment, the aeration control valve system includes a control valve unit configured for connection to a brine tank but instead fluidly coupled to an air intake inlet and an air release outlet for supplying and releasing air, respectively, when the valve cycle actuator is in the brine position and brine tank fill position, respectively.Type: GrantFiled: March 8, 2016Date of Patent: July 11, 2017Assignee: R.E. Prescott Co., Inc.Inventor: Russell E. Prescott
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Patent number: 9656230Abstract: A continuous process to upgrade heavy crude oil for producing more valuable crude feedstock having high API gravity, low asphaltene content, and high middle distillate yield, low sulfur content, low nitrogen content, and low metal content without external supply of hydrogen and/or catalyst. Heavy crude oil having substantial amount of asphaltene and heavy components is mixed with highly waxy crude oil having large amount of paraffinic components and water to decompose asphaltene compounds and remove sulfur, nitrogen, and metal containing substances under supercritical conditions. Product has higher API gravity, lower asphaltene content, high middle distillate yield, lower sulfur content, lower nitrogen content, and lower metal content to be suitable for conventional petroleum refining process.Type: GrantFiled: July 23, 2014Date of Patent: May 23, 2017Assignee: SAUDI ARABIAN OIL COMPANYInventor: Ki-Hyouk Choi
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Patent number: 9534273Abstract: The present invention is directed to a precious metal recovery process in which an acid sulfidic feed material is subjected to acid pressure oxidation and an alkaline sulfidic feed material is subjected to alkaline pressure oxidation, with the discharge slurries from the pressure oxidation processes being combined to reduce neutralization requirements prior to precious metal recovery.Type: GrantFiled: December 11, 2013Date of Patent: January 3, 2017Inventors: John William Langhans, Jr., Wilson Chung-Yeh Tsu
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Patent number: 9328008Abstract: A supercritical water oxidation treatment system for organic wastewater with a high salinity crystallizes high-salinity wastewater by a low temperature of liquid oxygen, and decreases an inorganic salt content in the wastewater. Under supercritical water conditions, a hydrocyclone (4) separates most precipitated solid salts in the wastewater, so effectively prevents pipes and the tubular reactor (22) after the hydrocyclone (4) from plugging. Inorganic salts are able to be continuously separated from the system by the hydrocyclone (4) at the bottom of a desalination device, In addition, excess oxygen and gaseous products CO2 are recovered by a separation recovery part. The reaction time and the reaction temperature of supercritical water oxidation reaction are lowered due to the installation of a simple post-treatment unit (37). Moreover, the heat of the reactor effluent with a high temperature is recovered in the system, so operation cost of the system is reduced evidently.Type: GrantFiled: December 5, 2012Date of Patent: May 3, 2016Assignee: XI'AN JIAOTONG UNIVERSITYInventors: Shuzhong Wang, Donghai Xu, Xingying Tang, Yanmeng Gong, Jie Zhang, Yuzhen Wang
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Publication number: 20150129507Abstract: The present invention is directed to a method for the treatment of an environmental medium contaminated with arsenic, comprising treating such medium with an effective amount of persulfate and zero valent iron.Type: ApplicationFiled: November 11, 2014Publication date: May 14, 2015Applicant: PEROXYCHEM LLCInventor: Philip A. BLOCK
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Patent number: 8980173Abstract: Disclosed are systems and methods for monitoring and controlling a real-time oxidation-reduction potential in a hot water system to inhibit corrosion in the hot water system. The method includes defining one or more operational protective zones in the hot water system. One or more of the operational protective zones includes an oxidation-reduction potential probe that is operable to measure a real-time oxidation-reduction potential in the hot water system at operating temperature and pressure. The probe transmits the measured real-time potential to the controller, which assesses and interprets the transmitted potential to determine whether it conforms to an oxidation-reduction potential setting. If the measured potential does not conform the oxidation-reduction potential setting, the controller is operable to feed or remove one or more active chemical species into or from the hot water system and further operable to change at least one system parameter.Type: GrantFiled: February 21, 2013Date of Patent: March 17, 2015Assignee: Nalco CompanyInventors: Jeffrey V. Fox, George T. Totura, Peter Hicks, David A. Grattan, Martin Godfrey
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Publication number: 20150041404Abstract: A method for treating acid mine drainage includes mixing acid mine drainage (20) and alkaline tailings from a gold recovery process (140). The acid mine drainage is thereby neutralized (12).Type: ApplicationFiled: March 12, 2013Publication date: February 12, 2015Applicant: MINTAILS MINNING SA (PTY) LIMITEDInventors: Jan Hendrik Phillipus Jacobs, Robert George Freeman
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Publication number: 20150013987Abstract: A process for treating oilfield waste water includes contacting the oilfield waste water with hydrogen peroxide, the oilfield waste water comprising sulfide; oxidizing the sulfide to sulfur; and precipitating the sulfur to form treated water from the oilfield waste water. A process for recycling oilfield waste water includes combining the oilfield waste water and hydrogen peroxide, the oilfield waste water comprising sulfide; oxidizing the sulfide to sulfur; forming a precipitate comprising a colloidal sulfur precipitate, a bulk sulfur precipitate, or a combination comprising at least one of the foregoing; removing the precipitate from the oilfield waste water to form treated water; introducing an additive to the treated water; and disposing the treated water in a subterranean environment.Type: ApplicationFiled: July 11, 2013Publication date: January 15, 2015Applicant: BAKER HUGHES INCORPORATEDInventors: Timothy Underwood, Armando Gomez, Larry Gene Hines, Jenifer Lascano
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Publication number: 20140374104Abstract: A method for reducing sulfide in oilfield waste water includes contacting oilfield waste water with an oxidizer in the presence of an iron catalyst. The oilfield waste water includes sulfide that is oxidized to sulfate while avoiding formation of a colloidal or bulk sulfur precipitate. A method for recycling oilfield waste water includes contacting oilfield waste water with an oxidizer in the presence of an iron catalyst, the oilfield waste water comprising sulfide; oxidizing the sulfide to sulfate; avoiding formation of a colloidal sulfur precipitate, a bulk sulfur precipitate, or a combination comprising at least one of the foregoing; clarifying the oilfield waste water by contacting the oilfield waste water with a flocculant to form an aggregate precipitate; separating the aggregate precipitate from the oilfield waste water to form a recycled water; combining an additive with the recycled water; and disposing the recycled water in a downhole environment.Type: ApplicationFiled: June 24, 2013Publication date: December 25, 2014Applicant: BAKER HUGHES INCORPORATEDInventor: Kushal Seth
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Publication number: 20140363364Abstract: The present invention relates to a method for purification of produced water and to a system for carrying out the inventive method. Further, the invention relates to a purified produced water product obtainable according to the invention. A unique sequence of unit operations including the addition of dissolved calcium hydroxide and the subsequent precipitation thereof enable a particularly efficient removal of contaminating substances from produced water from the petrochemical industry.Type: ApplicationFiled: January 7, 2013Publication date: December 11, 2014Applicant: PURETEQ A/SInventor: Dennis Søgaard
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Patent number: 8894865Abstract: This invention relates generally to processes for extracting iron and/or calcium from geothermal brines.Type: GrantFiled: November 14, 2012Date of Patent: November 25, 2014Assignee: Berkshire Hathaway Energy CompanyInventors: John L. Featherstone, George Furmanski
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Publication number: 20140332472Abstract: The invention discloses a process to implement and maintain water bodies larger than 15,000 m3 for recreational use, such as lakes or artificial lagoons, with excellent color, transparency and cleanness properties at low cost, which comprises the following steps: a.—providing a structure able to contain a large water body larger than 15,000 m3; b.—feeding the structure of step (a) with inlet water having iron and manganese levels lower than 1.5 ppm and turbidity lower than 5 NTU; c.—measuring water pH, ideally it should be within a range lower than 7.8; d.—adding an oxidizing agent to the water contained in the structure of step (a), with which a 600 mV minimal ORP is controlled in water for a minimal period of 4 hours and in maximal cycles of 48 hours; e.—adding a flocculating agent in concentrations within 0.Type: ApplicationFiled: July 28, 2014Publication date: November 13, 2014Inventor: Fernando Benjamin FISHMANN TORRES
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Patent number: 8871097Abstract: A method of reclaiming a formate brine may include increasing the pH of a spent formate brine fluid comprising water-soluble polymers; treating the fluid with an oxidizing agent; and removing at least a portion of suspended solids from the fluid. Further, a method of reclaiming a formate brine may include lowering the pH of the spent formate brine fluid comprising water-soluble polymers; increasing the pH of the spent formate brine fluid to initiate precipitation of materials solubilized in the fluid; treating the fluid with an oxidizing agent to break down remaining water-soluble polymer; and recovering at least a portion of the formate brine.Type: GrantFiled: July 24, 2008Date of Patent: October 28, 2014Assignee: M-I L.L.C.Inventors: Hui Zhang, Robert L. Horton, Charles Svoboda, Frank E. Evans
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Publication number: 20140263079Abstract: The present invention relates to systems and methods of wastewater treatment that rely primarily on the use of water treatment chemicals to clean wastewater without the need to use filtration mechanisms. The present invention generally provides a system that is less complex and less expensive to operate than wastewater treatment systems in the prior art.Type: ApplicationFiled: March 14, 2013Publication date: September 18, 2014Applicant: DuBois Chemicals, Inc.Inventor: Brent K. McCurdy
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Publication number: 20140251904Abstract: The present invention discloses device that can generate a strong vortex in the vortex chamber which significantly enhances rate of reactions and effectiveness of waste water treatment. The present invention disclose vortex diodes with or without inserts/stabilizers as continuous flow reactors to induce cavitation to generate radicals which reduces Chemical Oxygen Demand (COD), ammoniacal nitrogen and color of waste water effectively in effluent treatments.Type: ApplicationFiled: October 11, 2012Publication date: September 11, 2014Inventors: Vivek Vinayak Ranade, Amol Arvind Kulkarni, Vinay Manoharrao Bhandari
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Publication number: 20140246375Abstract: The present invention relates to a continuous bipolar electrochemically based reactor for the purpose of destroying free cyanide by direct and indirect oxidation and removing its strong complexes like ferrocyanide and ferricyanide by electrocoagulation. The designed reactor consists of four main sections, including electrooxidation, hydraulic mixing, electrocoagulation, and precipitation tank. The order of sections results in having a combination of reactions which separately remove cyanide and its compounds. The designed reactor shows a high flexibility in terms of handling highly variable kinds and concentrations of cyanide in the industrial wastewater effluents.Type: ApplicationFiled: March 3, 2013Publication date: September 4, 2014Inventors: Hamed Gharibi, Amir Hossein Mahvi
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Publication number: 20140246376Abstract: A process of concentrating a suspension of solid particles in an aqueous medium comprising introducing into the suspension at least one organic polymeric flocculant and addition of an agent system, in which the solid particles in the suspension are flocculated by the action of the at least one organic polymeric flocculant and the so formed flocculated solid particles settle to form a settled layer of solids suspended in the aqueous medium, wherein the agent system comprises: i) at least one oxidising agent; ii) at least one control agent,Type: ApplicationFiled: October 24, 2012Publication date: September 4, 2014Applicant: BASF SEInventors: Alexsandro Berger, Stephen Adkins, Stephan Hess
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Publication number: 20140238941Abstract: A mixing chamber system for removal of contaminants from a liquid, and related systems and methods, are provided. The mixing chamber system includes a length of pipe having a hollow interior. A plurality of perforated discs are stationarily positioned within the hollow interior in at least a portion of the length of pipe, wherein each of the plurality of perforated discs has a curved profile, wherein a middle portion of each of the plurality of perforated discs is offset from a radial edge of each of the plurality of perforated discs, respectively.Type: ApplicationFiled: February 21, 2014Publication date: August 28, 2014Inventor: Frederick J. Haydock
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Patent number: 8801937Abstract: A process for treatment of water containing an azole-type anticorrosive for copper, includes adding ferrous ions to the water containing the azole-type anticorrosive for copper and having a pH of 4-8, thereby precipitating an insoluble iron-azole complex, and separating the insoluble iron-azole complex. An amount of the ferrous ions added is 0.5 to 5.0 times, by molar ratio, an amount of the azole-type anticorrosive for copper in the water containing the azole-type anticorrosive for copper. After the insoluble iron-azole complex is separated, remaining total organic carbon (TOC) components are subjected to an ozone treatment.Type: GrantFiled: October 21, 2009Date of Patent: August 12, 2014Assignee: Kurita Water Industries Ltd.Inventors: Tomoharu Yasuike, Atsushi Nemoto
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Patent number: 8795536Abstract: Process for degrading organic substances in an aqueous composition comprising a step (a) wherein, in a liquid reaction medium, said aqueous composition is reacted with at least one composition comprising hydroxide ions (OH?) and hypochlorite in a molar ratio between hydroxide and hypochlorite higher than or equal to 0.001 and lower than 1.5, in order to oxidize said organic substances.Type: GrantFiled: January 29, 2009Date of Patent: August 5, 2014Assignee: Solvay (Societe Anonyme)Inventors: Patrick Gilbeau, Ward Blancke
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Patent number: 8790518Abstract: The invention discloses a process to implement and maintain large water bodies with color, transparency, and cleanness characteristics similar to swimming pools or tropical seas, at low cost. The present invention also discloses a structure to contain large water bodies, comprising a system for the removal of impurities and surface oils by means of skimmers and a suction device to clean said structure.Type: GrantFiled: March 30, 2011Date of Patent: July 29, 2014Assignee: Crystal Lagoons (Curacao) B.V.Inventor: Fernando Benjamin Fischmann Torres
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Patent number: 8790516Abstract: The invention relates to a method for removing arsenic as scorodite from solutions that contain iron and arsenic. In accordance with the method, arsenic is first precipitated as ferric arsenate and subsequently processed hydrothermally into crystalline scorodite.Type: GrantFiled: February 19, 2010Date of Patent: July 29, 2014Assignee: Outotec OyjInventors: Mikko Ruonala, Jaakko Leppinen, Ville Miettinen
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Patent number: 8772004Abstract: A method and device for aggregating algae in an aqueous solution is disclosed. The method can include providing an algae feed comprising a liquid and algae dispersed therein. The algae feed can be aggregated by applying a nanosecond pulsed electric field to the algae feed. The nanosecond pulsed electric field can include a plurality of electric pulses having a pulse duration ranging from 1 to 1,000 nanoseconds. The method can also include separating an aggregated algae stream from the algae feed and feeding the aggregated algae stream to a lipid extraction operation.Type: GrantFiled: June 25, 2010Date of Patent: July 8, 2014Assignee: Old Dominion University Research FoundationInventors: Gary C. Schafran, Juergen F. Kolb, Aron Stubbins, Karl H. Schoenbach
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Patent number: 8753518Abstract: In one aspect the invention provides a system for treating a wastestream, particularly a radwaste, for safe disposal and, in final processing converting it into one or both forms including an aqueous form for safe discharge to the environment and a solidified form for safe disposal. In another aspect the invention provides the capacity to employ a step where a specific target element strategy can be set up synchronizing sorbent substance choices and multiple recycle options to remove target substances from wastestream as a part of its Sorption or Powder Sorbent Isotopic Reduction step (II). Other steps cooperate with Sorption step (II) including Oxidation (I), Solid-Liquid separation (III), and Selective Ion Exchange (IV) to deliver the wastestream to final processing.Type: GrantFiled: September 25, 2011Date of Patent: June 17, 2014Assignee: Diversified Technologies Services, Inc.Inventors: Dennis A. Brunsell, Charles E. Jensen, Larry E. Beets
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Publication number: 20140151296Abstract: Systems and methods for removing organic contaminants from water may be used, for example, to treat produced water from a steam assisted heavy oil recovery operation. The treated produced water may be re-used to create steam. Alternatively, the produced water may be a blowdown stream treated to facilitate further treatment in a thermal crystallizer. The treatments may include pH adjustment or separating de-solubilized organics or both. Other treatments may include one or more of oxidation, sorption and biological treatments. The treatments may be used alone or in various combinations. One exemplary combination includes reducing the pH of produced water, separating de-solubilized organics from the produced water, and oxidizing the produced water or contacting the produced water with activated carbon.Type: ApplicationFiled: March 14, 2013Publication date: June 5, 2014Applicant: General Electric CompanyInventors: Brian Christopher MOORE, Hope MATIS, William Leonard KOSTEDT, IV, David M. POLIZZOTTI, Matthew Alan PETERSEN, Jeffrey Lynn SCHWORM, Anthony Yu-Chung KU
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Publication number: 20140151301Abstract: Provided is a method for treating an arsenic-containing aqueous solution by water treatment employing a titanium dioxide photocatalyst that is excellent in both photocatalytic activity and solid-liquid separation performance. The method according to the present disclosure includes the steps of adding catalyst particles to the aqueous solution; oxidizing trivalent arsenic by irradiating the aqueous solution with light having a wavelength of 200 nanometers or more and 400 nanometers or less while stirring the catalyst particles in the aqueous solution; and stopping the stirring and separating the catalyst particles from the aqueous solution by sedimentation. Each catalyst particle is composed only of a titanium dioxide particle and a zeolite particle, the titanium dioxide particle is adsorbed on the outer surface of the zeolite particle, the zeolite particle has a silica/alumina molar ratio of 10 or more, and the catalyst particles are contained in the aqueous solution at a concentration of 0.Type: ApplicationFiled: February 4, 2014Publication date: June 5, 2014Applicant: PANASONIC CORPORATIONInventors: Yuko MARUO, Daisuke INO
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Publication number: 20140144845Abstract: Embodiments of the invention provide a method and system for providing a regeneration stage in a water treatment system. The method can include entering a first air bleed state to allow pressurized, deoxygenated air to exit the water treatment system, entering a second air bleed state to equalize a first air pressure of remaining deoxygenated air inside the water treatment system with a second air pressure outside the water treatment system, entering a backwash state to expel remaining deoxygenated air and particulates from inside the water treatment system, and entering an air draw state to allow oxygenated air to enter the water treatment system.Type: ApplicationFiled: January 6, 2014Publication date: May 29, 2014Applicant: Pentair Residential Filtration, LLCInventors: Andrew Tischendorf, Michael M. Lindfors, Kyle Paull
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Publication number: 20140144844Abstract: A method of treating contaminated water effluent from a well drilling operation. The method comprises decomposing organic contaminants in the effluent by bubbling a gas containing ozone through the effluent; adding a coagulant to increase the particle size of solid particles contained in the effluent; adding a flocculant to increase the particle size of solid particles contained in the effluent, thereby forming floes suspended in the effluent; and filtering the floes from the effluent to produce a filtrate and flocculated solids. The method may further comprise adding the coagulant into a stream of effluent flowing within a first conduit under controlled shear conditions, and adding the flocculant into a stream of effluent containing pin floes flowing within a second conduit under controlled shear conditions. The method may further comprise delivering the effluent containing the suspended floes into a filter through a conduit floating in the effluent contained in the filter.Type: ApplicationFiled: May 2, 2012Publication date: May 29, 2014Inventors: Francis C. Miller, Steve Addleman
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Patent number: 8734653Abstract: A mercury remediation method and apparatus for reducing mercury levels in water to a nanogram per liter level that uses four treatment steps: (1) chelation; (2) oxidation; (3) reduction; and (4) air stripping, vapor/liquid separation. There is a fifth step in the process, which does not involve the wastewater. It is to scrub the stripper air of the volatile mercury in an off-gas adsorption unit or to condense volatile mercury in a cryogenic mercury trap.Type: GrantFiled: November 30, 2011Date of Patent: May 27, 2014Inventor: Terrence W. Aylesworth
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Patent number: 8728325Abstract: Advanced oxidation process namely ozonation and Fenton's (hydrogen peroxide/Fe:2+) were utilized to degrade kinetic hydrate inhibitor (KHI). The oxidized solution after scavenging oxygen can be successfully disposed to the injection well. This facilitates use of KHI more frequently and in higher concentrations for future projects oil & gas operations. It also offers an alternative that competes efficiently with thermodynamic hydrate inhibitor (THI) or complements THI.Type: GrantFiled: March 1, 2012Date of Patent: May 20, 2014Assignee: ConocoPhillips CompanyInventors: Altaf Hussain, Isik Riza Turkmen, Joel Minier Matar, Samir Gharfeh, Samer Adham
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Patent number: 8721898Abstract: Disclosed is an improved water treatment cavitation reactor cone. The tank operates on a continuous flow of fluids which are subjected to ultrasonic waves in combination with a high level of injected ozone. The treatment tank includes a tangential inlet that induces a rotating flow into the tank thereby increasing the mixing of the ozone within the effluent. The effluent is further treated with DC current. The treatment tank provides a cost efficient and environmentally friendly process and apparatus for cleaning and recycling fluids as contaminated as frac water, used to stimulate gas production from shale formations, as well as other types of fluids having various levels of contaminants such as aerobic and anaerobic bacteria and suspended solids. The calcium carbonate scaling tendency is reduced to an acceptable level without the use of acids, ion exchange materials, or anti scaling chemicals which is of economical and environmental significance and benefit.Type: GrantFiled: April 23, 2010Date of Patent: May 13, 2014Assignee: Ecosphere Technologies, Inc.Inventors: Dennis McGuire, Sanjeev Jakhete
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Publication number: 20140124453Abstract: Methods and systems for treating contaminated flow-back water produced by hydraulic fracture are provided. The method involves precipitating metals from the flow-back water stream in a first reaction using at least one oxidizing agent, at least one pH adjusting agent, a source of sulfate and carbonate ions, and at least one co-precipitation agent. The precipitated metals may be dewatered using a first filter and may be used as an additive to drilling mud. The flow-back water may be further purified in a second reaction by addition of at least one pH adjusting agent and hydrated lime to precipitate salts. The precipitated salts may be dewatered using a second filter and may be used as an accelerating additive to concrete. The purified flow-back water may be stabilized by the addition of at least one pH adjusting agent to provide a water stream that may be reused in the hydraulic fracture drilling process.Type: ApplicationFiled: November 8, 2012Publication date: May 8, 2014Inventor: Michael Presutti
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Publication number: 20140116954Abstract: Methods of removing one or more oxyanions from an aqueous fluid can comprise increasing the pH of an aqueous fluid containing one or more oxyanions and contacting the aqueous fluid with aluminum metal.Type: ApplicationFiled: October 23, 2013Publication date: May 1, 2014Applicant: The Water CompanyInventors: Brian B. ELSON, Michael Fallbach
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Patent number: 8709259Abstract: The present invention is a wastewater treatment method using dried BOF slag and hydrogen peroxide, wherein hydrogen peroxide is oxidized to generate hydroxyl radicals that reacts with soluble metal contaminants in the sludge such that these contaminants can be adsorb on the catalyst particles and/or eliminated from the wastewater stream by separation techniques. The process can use catalytic oxidation for soluble metals removal. In addition, catalytic oxidation can produce a filtered water saturated with Oxygen and higher in pH resulting in enhanced precipitation of soluble metals when softening agents, such as Sodium Carbonate, are added in a subsequent processing step. Another embodiment of the present invention is a method using ferrous sulfate for removing soluble metals in wastewater, followed by Catalytic Oxidation to remove soluble Fe without addition of metal salts, and removing sulfates by adding Barium Carbonate.Type: GrantFiled: December 2, 2011Date of Patent: April 29, 2014Inventor: Frederick Douglas, Sr.