Nitrogenous Patents (Class 210/903)
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Patent number: 7666302Abstract: A water treatment apparatus including a series of pairs of water filtration cells of an upwelling type. Each cell of each pair has a longitudinally extending water conduit in fluid communication between an upper and a lower end of each cell. The first cell of each pair is a fluidized bed type containing a biologically active media, the water entering a bottom of this cell upwelling through the biologically active media to discharge from a discharge port at or near the top of the first cell. The second cell of each pair has the upper end of its water conduit in fluid communication with the discharge port of the paired first cell and contains media which removes nitrates from the water entering and upwelling through the nitrate removing media for discharge from the second cell.Type: GrantFiled: July 7, 2008Date of Patent: February 23, 2010Inventor: David W Jenkins
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Patent number: 7666314Abstract: The present invention relates to methods for the removal of organic nitrogen, organic and inorganic contaminants from an aqueous liquid. More particularly, the present invention related to a process for the removal of organic and inorganic contaminants such as organic nitrogen and all other organic and inorganic contaminants from wastewater and ground water by conducting a two step method which includes the step of adding nitrosonium ion generator such as nitrous acid and nitrite in acidic media to remove organic nitrogen and followed by the step of adding hydrogen peroxide and activated carbon to remove all the other organic and inorganic contaminants.Type: GrantFiled: January 15, 2004Date of Patent: February 23, 2010Assignee: Eng Soon TeohInventor: Eng-Chye Teoh
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Patent number: 7658850Abstract: The present invention provides a mixed bacterial culture, designated as the culture Atz Mix 1, which degrades atrazine at various temperatures (10° C. to 30° C.) in a wide range of atrazine concentrations (several ppb to ten thousand ppm), without formation of toxic metabolites. Atz Mix 1 is a stable mixed culture and includes catabolic genes trzN, atzB, atzC coding the enzymes for the degradation of atrazine to cyanuric acid, and the gene trzD coding the enzymes for subsequent opening of s-triazine ring. The invention further includes a microbiological method of degrading atrazine and other s-triazine compounds for remediation of atrazine-contaminated soils, even those rich in nitrogen, as well as for accelerating the process of atrazine mineralization in waste waters containing high concentrations of s-triazine compounds.Type: GrantFiled: August 20, 2008Date of Patent: February 9, 2010Assignee: Rudjer Boskovic InstituteInventors: Dubravka Hrsak, Maja Havriluk
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Patent number: 7645385Abstract: The invention relates to a method for processing nitrogen-concentrated effluents by ammonia oxidation into nitrites followed by nitrite denitritation in a gaseous nitrogen in a sequential biological reactor (1) consisting in pouring a processable effluent volume in to the reactor by successive volume fractions, in dividing the entire processing cycle into successive sub cycles, wherein each sub-cycle comprises a feeding phase, an aeration phase for nitrification and an anoxia phase along which a carbon-containing source is introduced into the reactor for converting nitrites into nitrogen.Type: GrantFiled: July 27, 2006Date of Patent: January 12, 2010Assignees: Suez Environment, DegremontInventors: Samuel Martin, Adriana Gonzalez Ospina
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Patent number: 7632408Abstract: A passive drain field assembly reduces nitrogen in wastewater by facilitating nitrification and denitrification. A first chamber receives effluent into a multi-pipe bundle. An air vent is provided that extends from the atmosphere into the first chamber. A second chamber receives effluent from the first chamber, and contains a medium, beneath which is positioned a drainage pipe for releasing treated effluent into the soil therebeneath. A berm creates a retention area in the second chamber that is lined with a water-impermeable liner. In use, ammonia present in the effluent is converted to nitrate in the presence of the oxygen admitted by the air vent in the first chamber. The liquid retained upstream of the berm and above the liner undergoes anaerobic reactions. The remaining liquid proceeds to a place in the second chamber from which the drainage pipe can be entered, from which the treated wastewater can enter the soil.Type: GrantFiled: June 27, 2008Date of Patent: December 15, 2009Assignee: Plastic Tubing Industries, Inc.Inventor: Douglas G. Everson
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Patent number: 7625490Abstract: A nitrification-denitrification process using magnetic seeding and magnetic separation to treat water is provided. The process includes biologically converting ammonia to nitrates with a biofilm disposed on magnetic seed. Suspended solids are removed by mixing flocculant and magnetic seeds with the water and magnetically removing floc formed floc from the water.Type: GrantFiled: September 27, 2007Date of Patent: December 1, 2009Inventor: Steven L. Cort
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Patent number: 7622047Abstract: A fluidized bed reactor (14) for removing phosphorus and nitrogen from wastewater has a column comprising a number of sections. (15A, 15B, 15C, 15D) The diameter of the column changes stepwise between the sections. A flow velocity in excess of 100 cm/min is maintained in a lowermost one of the sections and lower flow velocities are maintained in subsequent sections. A struvite supersaturation ratio is controlled in part by recycling wastewater from an outlet of the column. Struvite pellets are removed periodically from the bottom of the column.Type: GrantFiled: February 13, 2004Date of Patent: November 24, 2009Assignee: The University of British ColumbiaInventors: Fred A. Koch, Donald S. Mavinic, Noboru Yonemitsu, Ahren T. Britton
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Patent number: 7604733Abstract: A biological removal method of phosphorus and nitrogen includes supplying a mixture gas into a gas holder. Inflow water and return water are supplied into the gas holder to make the mixture gas dissolved in the inflow water and the return water. The return water was provided from a granulation biological reaction tank. The inflow water and the return water including the dissolved mixture gas are transported to the granulation biological reaction tank. A nitrogen-based component is removed from the inflow water and the return water using methan-oxidizing bacteria granulated in the granulation biological reaction tank. Treated water without the nitrogen-based component is transported to an anoxic tank for treatment, and discharged from the anoxic tank.Type: GrantFiled: March 16, 2009Date of Patent: October 20, 2009Assignees: Korea Institute of Construction Technology, Daewoo Engineering & Construction Co., Ltd.Inventors: Kwang-Soo Kim, Hee-Ja Lee, I-Tae Kim, Kwang-Ho Ahn, Chai-Sung Gee, Sung-Youn Kim, Ji-Seon Yoo, Eui-Sin Lee, Sung-Pok Paik, Chul-Ki Oh, Kwang-Yoon Lee
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Patent number: 7597808Abstract: A wastewater treatment apparatus comprises a nitrogen-containing dye containing wastewater inlet connected to an obligatory anaerobic tank to bring wastewater containing a nitrogen-containing dye into contact with sulfate-reducing bacteria under obligatory anaerobic conditions, a nitrification tank to bring the wastewater into contact with nitrifying bacteria under aerobic conditions, and a denitrification tank to bring the wastewater into contact with the denitrifying bacteria under anaerobic conditions.Type: GrantFiled: July 12, 2006Date of Patent: October 6, 2009Assignee: Kuraray Co., Ltd.Inventors: Tadao Shiotani, Yuko Takami, Seiichi Nakahara
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Patent number: 7582467Abstract: A method and an apparatus for processing organic material, the method employing at least two reactors and including the steps of combining carbon dioxide or carbon-dioxide containing gas and ammonia or ammonia-containing material in a first reactor to form a buffer compound/buffer compounds, then feeding the buffer compound or buffer compounds formed in the first reactor into a second reactor, and performing bioconversion on organic material in the second reactor. In that case, the carbon dioxide of the mixed carbon dioxide gas reacts with the ammonia, forming a buffer compound, such as ammonium bicarbonate and/or ammonium carbonate.Type: GrantFiled: November 10, 2004Date of Patent: September 1, 2009Assignee: Preseco OyInventor: Jussi Järventie
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Publication number: 20090206028Abstract: An economical, integrated system works in series with anaerobic digestion of animal waste to recover nitrogen and phosphorous, while also scrubbing the produced biogas.Type: ApplicationFiled: June 3, 2008Publication date: August 20, 2009Inventors: Anping Jiang, Tianxi Zhang, Craig Frear, Shulin Chen
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Patent number: 7575679Abstract: The process for treating an ammonium containing liquid by denitrification treatment of an ammonium containing liquid containing at least ammonium comprises carrying out nitrate reduction treatment of reducing nitrate contained in or added to the ammonium containing liquid to nitrite, and carrying out anaerobic ammonium oxidation treatment of simultaneously anaerobically denitrifying nitrite produced in the nitrate reduction treatment and ammonium contained in the ammonium containing liquid by anaerobic ammonium oxidizing bacteria.Type: GrantFiled: August 27, 2008Date of Patent: August 18, 2009Assignee: Hitachi Plant Technologies, Ltd.Inventors: Tatsuo Sumino, Kazuichi Isaka
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Patent number: 7575685Abstract: The present invention is directed to a substantially odorless biologically mediated treatment process for solid and liquid organic wastes. The present invention also provides for a novel nutrient rich humus material produced from the biologically mediated treatment process. The bioconversion process of the present invention results from low electron acceptor concentrations and high quantities of microorganisms in a diverse microbial community.Type: GrantFiled: November 3, 2006Date of Patent: August 18, 2009Assignee: Bion Technologies, Inc.Inventors: James W. Morris, Jere Northrop
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Patent number: 7575684Abstract: In waste water treatment apparatus and method, a mineral mixing tank receives biologically treated water, sludge which is generated by biological treatment, and mineral sludge which contains calcium and so on from a settling tank. A mineral pump returns the sludge and the treated water from the mineral mixing tank to a raw water tank. An air-lift pump circulates treatment water between a reaeration tank having a semi-anaerobic section and a denitrification tank. In circulation of the treatment water between the reaeration tank and the denitrification tank, the semi-anaerobic section alleviates the change of environment for microorganisms and thereby realizes the environment easy to propagate for the microorganisms. The air-lift pump allows the agitation with low energy consumption even when the microorganisms are cultured up to a high concentration thereof.Type: GrantFiled: September 12, 2006Date of Patent: August 18, 2009Assignee: Sharp Kabushiki KaishaInventors: Kazuyuki Yamasaki, Kazuyuki Sakata
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Patent number: 7572369Abstract: A method of supporting denitrification includes receiving biological material at a pulsed electric field station and applying a pulsed electric field to the biological material within a treatment zone in the pulse electric field station to generate treated biological material. The method also includes transporting at least a portion of the treated biological material to an anoxic bioreactor in substitution, at least in part, for an external source of electron donor. A system for supporting denitrification is also provided.Type: GrantFiled: January 18, 2008Date of Patent: August 11, 2009Assignee: OpenCEL LLCInventors: Michael T. Gallagher, James Banaszak
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Patent number: 7550086Abstract: Advanced treatment method and system of ethanolamine-containing wastewater are disclosed, which perform physicochemical and biological treatment processes. The method regenerates cation exchange resin that captures ethanolamine discharged from a nuclear power plant or a thermal power station, concentrates the ethanolamine-containing wastewater to reduce the volume of the wastewater, and then treats the highly concentrated ethanolamine-containing wastewater through biological decomposition and denitrification processes. The system for treating ethanolamine-containing wastewater performs the physicochemical process (ion-exchange and resin regenerations) where the waster is concentrated, and then applies the biological process to the small amount of wastewater highly concentrated. The physicochemical process is composed of exchanging ions and eluting/concentrating ethanolamine using sodium hydroxide.Type: GrantFiled: July 27, 2007Date of Patent: June 23, 2009Inventors: In hyoung Rhee, Dae chul Cho, Byung gi Park, Hyun kyoung Ahn, Hyun jun Jung, Jun taek Hyun, Nam Soo Huh, Mi hae Yoon, Hyun kak Han
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Patent number: 7550082Abstract: The process for treating an ammonium containing liquid by denitrification treatment of an ammonium containing liquid containing at least ammonium comprises carrying out nitrate reduction treatment of reducing nitrate contained in or added to the ammonium containing liquid to nitrite, and carrying out anaerobic ammonium oxidation treatment of simultaneously anaerobically denitrifying nitrite produced in the nitrate reduction treatment and ammonium contained in the ammonium containing liquid by anaerobic ammonium oxidizing bacteria.Type: GrantFiled: March 7, 2008Date of Patent: June 23, 2009Assignee: Hitachi Plant Technologies, Ltd.Inventors: Tatsuo Sumino, Kazuichi Isaka
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Patent number: 7550087Abstract: A process has steps of one or more of aerobic treatment to remove COD and nitrify a waste stream, anoxic treatment to denitrify a waste stream, anoxic treatment to remove selenium and anaerobic treatment to remove heavy metals and sulphur. The process may be used to treat, for example, FGD blow down water. The process may further include one or more of (a) membrane separation of the waste stream upstream of the anoxic digestion to remove selenium, (b) dilution upstream of the biological treatment step, (c) physical/chemical pretreatment upstream of the biological processes or dilution step to remove TSS and soften the waste stream, or (d) ammonia stripping upstream of the biological treatment steps or dilutions step. These processes may be provided in a variety of suspended growth or fixed film reactors, for example a membrane bioreactor or a fixed film reactor having a GAC bed.Type: GrantFiled: December 11, 2006Date of Patent: June 23, 2009Assignee: Zenon Technology PartnershipInventors: Jeffrey Gerard Peeters, William A. Bonkoski, Pierre Lucien Cote, Hidayat Husain
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Patent number: 7550083Abstract: The process for treating an ammonium containing liquid by denitrification treatment of an ammonium containing liquid containing at least ammonium comprises carrying out nitrate reduction treatment of reducing nitrate contained in or added to the ammonium containing liquid to nitrite, and carrying out anaerobic ammonium oxidation treatment of simultaneously anaerobically denitrifying nitrite produced in the nitrate reduction treatment and ammonium contained in the ammonium containing liquid by anaerobic ammonium oxidizing bacteria.Type: GrantFiled: March 7, 2008Date of Patent: June 23, 2009Assignee: Hitachi Plant Technologies, Ltd.Inventors: Tatsuo Sumino, Kazuichi Isaka
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Publication number: 20090145844Abstract: A sequencing batch membrane bioreactor is provided, comprising a wastewater reservoir, at least one sequencing batch bioreactor, and a membrane reactor. The wastewater reservoir collects and stores wastewater. The sequencing batch bioreactor receives the wastewater in batches from the wastewater reservoir for performing a stirring and aeration process to remove ammonia-based nitrogen, phosphoric ions and organic substance from the wastewater. The membrane reactor is disposed outside of the sequencing batch bioreactor, wherein the wastewater is introduced from the sequencing batch bioreactor to the membrane reactor, treated with solid-liquid separation, and discharged.Type: ApplicationFiled: June 11, 2008Publication date: June 11, 2009Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Kuang Foo Chang, Huey-Song You, Sheng Hsin Chang
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Patent number: 7544299Abstract: The present disclosure describes an improved system and method for treating wastewater or other liquid. Furthermore, the present disclosure provides a control program for operating the system and method. In one embodiment, the treatment process utilizes a biological nutrient removal activated sludge process utilizing a continuously sequencing reactor (CSR).Type: GrantFiled: June 25, 2008Date of Patent: June 9, 2009Assignee: Schreiber, LLCInventors: Adrian F. Carolan, William F. Foreman, III, John K. Shepherd, Jr.
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Patent number: 7540959Abstract: The process for treating an ammonium containing liquid by denitrification treatment of an ammonium containing liquid containing at least ammonium comprises carrying out nitrate reduction treatment of reducing nitrate contained in or added to the ammonium containing liquid to nitrite, and carrying out anaerobic ammonium oxidation treatment of simultaneously anaerobically denitrifying nitrite produced in the nitrate reduction treatment and ammonium contained in the ammonium containing liquid by anaerobic ammonium oxidizing bacteria.Type: GrantFiled: August 27, 2008Date of Patent: June 2, 2009Assignee: Hitachi Plant Technologies, Ltd.Inventors: Tatsuo Sumino, Kazuichi Isaka
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Patent number: 7537698Abstract: The process for treating an ammonium containing liquid by denitrification treatment of an ammonium containing liquid containing at least ammonium comprises carrying out nitrate reduction treatment of reducing nitrate contained in or added to the ammonium containing liquid to nitrite, and carrying out anaerobic ammonium oxidation treatment of simultaneously anaerobically denitrifying nitrite produced in the nitrate reduction treatment and ammonium contained in the ammonium containing liquid by anaerobic ammonium oxidizing bacteria.Type: GrantFiled: February 23, 2006Date of Patent: May 26, 2009Assignee: Hitachi Plant Technologies, Ltd.Inventors: Tatsuo Sumino, Kazuichi Isaka
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Patent number: 7510655Abstract: A process for treating BOD, nitrogen and phosphorus containing wastewater, wherein the process includes the steps of providing wastewater influent into an anoxic zone having activated sludge and mixing the wastewater influent with the activated sludge in the anoxic zone to form a mixed liquor. The process further includes providing the mixed liquor into one more further treatment zones and transferring a portion of the mixed liquor from the further treatment zone to a membrane filter wherein a filtrate is separated from sludge. The process also includes selectively recycling at least a portion of the sludge to the anoxic zone as recycled activated sludge.Type: GrantFiled: July 13, 2007Date of Patent: March 31, 2009Assignee: Siemens Water Technologies Corp.Inventor: Dennis J. Barnes
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Publication number: 20090071900Abstract: A constant velocity serpentine anoxic reactor incorporates a multiple cell vertical serpentine path, as well as a horizontal serpentine path, through the anoxic chamber. A fixed film media is mounted within each cell of the anoxic chamber to provide a structure on which the bacteria can grow to sustain the biological reaction, which convert nitrates into nitrogen gas. The fixed film media can be a cross-flow media and can optionally include a web of textile material integrated within the fixed film media to enhance bacterial growth within the fixed film media or optionally the anoxic vertical serpentine configuration could be applied to an activated sludge operation. A nitrate recycle pump recycles about 75% of the effluent from the aerobic chamber back into the anoxic chamber to provide a nitrate source for the digestion of the BOD within the influent wastewater.Type: ApplicationFiled: September 19, 2007Publication date: March 19, 2009Applicant: Brentwood Industries, Inc.Inventors: Frank M. Kulick, III, Curtis S. McDowell
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Patent number: 7485229Abstract: The present invention provides a closed sulfur circulation wastewater treatment system, which combines autotrophic and heterotrophic denitrification to recycle sulfates. Particularly, the present invention provides a process and a system for wastewater treatment which effectively process wastewater having both high nitrates and low organic carbonaceous sources, and effectively reduce sulfates by-products.Type: GrantFiled: March 22, 2006Date of Patent: February 3, 2009Assignee: National Chiao Tung UniversityInventors: Jin-Gaw Lin, Hong-Bang Cheng
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Patent number: 7481933Abstract: A process for treating BOD, nitrogen and phosphorus containing wastewater, wherein the process includes providing wastewater influent into an anaerobic zone having activated sludge and mixing the wastewater influent with the activated sludge in the anaerobic zone to form a mixed liquor. The process further includes providing the mixed liquor into an oxygen-deficit aeration zone and recycling denitrified mixed liquor from the oxygen-deficit aeration zone to the anaerobic zone for mixing therein with wastewater. In addition, the process includes transferring the mixed liquor from the oxygen-deficit aeration zone to an oxygen-surplus aeration zone and transferring a portion of the mixed liquor from the oxygen-surplus aeration zone to a membrane filter wherein a filtrate is separated from sludge. The process also includes recycling at least a portion of the sludge to the oxygen-deficit aeration zone as recycled activated sludge.Type: GrantFiled: April 11, 2006Date of Patent: January 27, 2009Assignee: Siemens Water Technologies CorporationInventor: Dennis J. Barnes
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Patent number: 7473365Abstract: The biological water or wastewater treatment process described herein alternates aeration and anoxic phases during a water treatment process. According to one exemplary process, the water or wastewater is directed into a biological tank. The water or wastewater in the biological tank is aerated until measured nitrate or redox values meet high nitrate or high redox set value conditions relative to minimum aeration and maximum aeration time requirements. Subsequently, the water or wastewater is subjected to anoxic treatment until the measured nitrate value meets low nitrate set value conditions relative minimum and maximum anoxia time requirements.Type: GrantFiled: July 22, 2004Date of Patent: January 6, 2009Assignee: OTV SA S.A.Inventors: Loic Oger, Annie Tazi Pain, Michele Payraudeau
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Patent number: 7470367Abstract: The invention relates to a process for removing a contaminant from groundwater wherein it is not necessary for groundwater to be extracted from the soil. To that end, the process according to the invention comprises the following steps: a) a biologically active layer (2) is applied on or in the soil b) the contaminated groundwater is contacted with the biologically active layer (2). The contaminant is converted in the biologically active layer. The biologically active layer (2) may be applied discontinuously. The contaminated groundwater may be contacted with the biologically active layer with the aid of for example a gas.Type: GrantFiled: December 16, 2004Date of Patent: December 30, 2008Assignee: Terreco Holding B.V.Inventors: Laurentinus Wilhelmus Steenbakkers, Martin Willem Jozef Plum, Dominicus Richardus Johannes Grootjen
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Patent number: 7465394Abstract: Disclosed is a system for treating wastewater. The system includes a microorganism clad structure positioned in a body of wastewater such that the microorganism clad structure is at least partially submerged in the body of wastewater. The apparatus also includes an aeration device, such as a propeller-type, surface mounted aeration device, supplying a horizontal flow of oxygenated water to the microorganisms attached to the microorganism clad structure such that the microorganisms may carry out a biological process.Type: GrantFiled: September 5, 2006Date of Patent: December 16, 2008Assignee: Aeration Industries International, Inc.Inventors: Daniel Durda, G. Shawn Brown, Cory Mortenson
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Patent number: 7462284Abstract: The present invention relates to a novel approach for nitrate removal from a marine recirculating system (10) wherein high concentrations of sulfate found in seawater is used in combination with sludge (20) collected from fish growing tanks (12) to promote dissimilatory sulfate reduction to hydrogen sulfide. The sulfide is used as an electron source to promote autotrophic denitrification in an up-flow fix bed bioreactor (16), followed by nitrification in a nitrification unit (14). By utilizing the symbiotic relationship between the sulfate-reducing and sulfide-oxidizing bacterial community, nitrate accumulation is controlled in the recirculating water of the system thereby reducing water exchange in the marine recirculating system.Type: GrantFiled: January 31, 2005Date of Patent: December 9, 2008Assignee: University of Maryland Biotechnology InstituteInventors: Harold J. Schreier, Yossi Tal
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Patent number: 7455780Abstract: A method of treating domestic wastewater wherein the wastewater is directed through a high carbon ash particulate. Contaminants such as phosphorus, nitrogen, BOD and COD can be removed. In addition, treatment of the domestic waste with ash will raise the pH of the wastewater, generally to above 10, killing bacteria contained in the wastewater.Type: GrantFiled: March 13, 2007Date of Patent: November 25, 2008Inventors: Bobby L. Joyner, Robert J. Waldrop
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Patent number: 7445722Abstract: The invention relates to a device for thermally purifying waste water, comprising a tank through which waste water can flow. The inventive device is characterized by having at least one flow guiding means for guiding the waste water inside the tank in an essentially meandering manner, and by having at least one heating means inside the tank for regulating a predetermined temperature.Type: GrantFiled: June 23, 2003Date of Patent: November 4, 2008Assignee: AMI - Agrolinz Melamine International GmbHInventors: Wolfgang Ruech, Christoph Neumüller, Frank Schröder
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Patent number: 7442353Abstract: A process by which heat is removed from a reactant fluid to reach the operating temperature of a known pollutant removal method and said heat is recirculated to raise the temperature of the product fluid. The process can be utilized whenever an intermediate step reaction requires a lower reaction temperature than the prior and next steps. The benefits of a heat-recirculating cooler include the ability to use known pollutant removal methods and increased thermal efficiency of the system.Type: GrantFiled: October 21, 2004Date of Patent: October 28, 2008Assignee: The United States of America as represented by the United States Department of EnergyInventors: George A. Richards, David A. Berry
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Patent number: 7435349Abstract: A system for treating wastewater containing organic compounds is provided, comprising an anaerobic bioreactor, an aerobic bioreactor disposed rearwardly of the anaerobic bioreactor, and a membrane separation reactor disposed rearwardly of the aerobic bioreactor. The system is capable of removing organic pollutants in wastewater through biological treatment process and separating solid from the liquid ones by using a membrane. By employing the system for treating wastewater containing organic pollutants, organic pollutants can be effectively eliminated and the problem of scaling and fouling on the surface of the membrane prevented, thus achieving the objectives of lowering cost and improving efficiency.Type: GrantFiled: March 14, 2006Date of Patent: October 14, 2008Assignee: Industrial Technology Research InstituteInventors: Huey-Song You, Ming-Jing Perage, Sheng-Shin Chang, Yih-Chang Chen, Shwu-Huey Perng
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Patent number: 7416669Abstract: The present disclosure describes an improved system and method for treating wastewater or other liquid. Furthermore, the present disclosure provides a control program for operating the system and method. In one embodiment, the treatment process utilizes a biological nutrient removal activated sludge process utilizing a continuously sequencing reactor (CSR).Type: GrantFiled: February 24, 2006Date of Patent: August 26, 2008Assignee: Schreiber, LLCInventors: Adrian F. Carolan, William F. Foreman, III, John K. Shepherd, Jr.
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Publication number: 20080197074Abstract: A method of supporting denitrification includes receiving biological material at a pulsed electric field station and applying a pulsed electric field to the biological material within a treatment zone in the pulse electric field station to generate treated biological material. The method also includes transporting at least a portion of the treated biological material to an anoxic bioreactor in substitution, at least in part, for an external source of electron donor. A system for supporting denitrification is also provided.Type: ApplicationFiled: January 18, 2008Publication date: August 21, 2008Applicant: OpenCEL LLCInventors: Michael T. Gallagher, James Banaszak
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Patent number: 7410584Abstract: Methods and apparatus for treating wastewater are described, one method embodiment including the steps of flowing a stream comprising mixed liquor suspended solids and fixed growth solids to a high rate clarification stage, forming a clarifier effluent, a first waste activated sludge stream, and a return waste activated sludge stream. The high rate clarifier effluent stream then flows to a membrane stage that includes a membrane media, producing a membrane reject (retentate) stream and a treated effluent (permeate) stream. Optionally, the methods include routing a screened raw wastewater to an anaerobic and/or aerated anoxic stage and introducing a gas comprising oxygen to the wastewater during the aerated anoxic stage, and optionally allowing the product of this stage to flow to an aeration stage prior to the high rate clarification stage.Type: GrantFiled: October 8, 2007Date of Patent: August 12, 2008Assignee: Ashbrook Simon-Hartley Operations, LPInventor: Jeffrey S. Devine
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Patent number: 7410589Abstract: The invention relates to a method of treating manure such that odor from the manure is significantly reduced or eliminated and producing therefrom recyclable water, value-added biosolids and ammonia. Specifically, the manure is combined with lime at high pH. The material is mixed under negative pressure and the basic conditions cause ammonia to be evolved from the manure which is then drawn off and recovered. A coagulating agent is then added which further promotes floc formation within the manure. Following further mixing, flocs are separated from the liquid portion. A struvite-promoting chemical and a coagulant are then added to the liquid portion which causes further floc formation, and the flocs are again separated from the substantially clear liquid. It is of note that as a result of this process, the solids are highly hydrophobic and dry very quickly. It is of further note that solids isolated from either step can be combined and sold, for example, as fertilizer, as discussed below.Type: GrantFiled: July 26, 2002Date of Patent: August 12, 2008Inventor: Gurunathan Lakshman
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Patent number: 7407580Abstract: The present invention relates to a wastewater treating system and method for removing pollutants of carbon, nitrogen, phosphorous, comprising: a first reactor contains methanogenic bacteria, PAO and denitrifying bacteria for eliminating the organic carbon in denitrification by denitrifying bacteria, adsorbing partial organic carbon and releasing phosphate by PAO and; metabolizing organic carbon to form methane gas by methanogenic bacteria; a second reactor disposed at the rearward of first reactor, second reactor treats the effluent from first reactor by denitrifying bacteria and PAO, denitrifying bacteria is able to denitrifying the nitrate and PAO is able to process the phosphorous releasing; a third reactor disposed rearward of second reactor, which comprises PAO, heterotrophic bacteria and nitrifying bacteria, wherein PAO is applied for phosphorous accumulating process, the heterotrophic bacteria is applied for carbon removal process, the nitrifying bacteria is applied for nitrifying process; and a membraType: GrantFiled: June 28, 2006Date of Patent: August 5, 2008Assignee: Industrial Technology Research InstituteInventors: Huey-Song You, Kuan-Foo Chang, Sheng-Shin Chang, Shwu-Huey Perng, Shu-Kang Hsu
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Patent number: 7407579Abstract: The method for treating an ammonium-containing liquid which biologically denitrifies ammonium contained in the ammonium-containing liquid in an anaerobic atmosphere, the method comprises the steps of: bringing the ammonium-containing liquid into contact with anaerobic bacteria in a biological treatment tank, the anaerobic bacteria having an ability to biologically denitrify the ammonium in the anaerobic atmosphere; and adding nitrite to the biological treatment tank from a nitrite storage tank concurrently with the bringing step, the nitrite storage tank storing the nitrite with a certain concentration.Type: GrantFiled: October 27, 2005Date of Patent: August 5, 2008Assignee: Hitachi Plant Technologies, Ltd.Inventors: Tasuo Sumino, Kazuichi Isaka
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Patent number: 7396466Abstract: A system (10) comprising multiple units (40a-40h) and method for filtration of wastewater (20) is disclosed. Simultaneous denitrification of a single filter unit and normal filtration of the remaining filter units is provided for. Separate flow control systems (36) are described.Type: GrantFiled: April 29, 2004Date of Patent: July 8, 2008Assignee: Tetra Process Technologies Seven Trent Services CompanyInventors: Joseph M. Bonazza, Donald J. McCarty, Navin Kadakia, David C. Slack
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Patent number: 7393452Abstract: A method for processing environmental samples to remove or otherwise reduce the level of certain chemical species. In a preferred embodiment, the present invention contemplates a process for reducing the level of inorganic and/or organic chemical species in wastewater or other aqueous or semi-aqueous environments or other waste environments. The present invention further provides compositions of bacteria useful in modulating the redox potential of an environment to generate redox mediator species which facilitate the removal of particular inorganic or organic molecules from the environment or from samples therefrom. The redox potential is preferably modulated through microbial-mediated oxidation or reduction of metal cations under aerobic or anaerobic conditions, respectively. The present invention is further directed to a computer program which facilitates the controlled modulation of the redox potential of an aqueous or semi-aqueous environment or other environments.Type: GrantFiled: April 11, 2003Date of Patent: July 1, 2008Assignee: Nanyang Technological UniversityInventors: Joo Hwa Tay, Stephen Tiong Lee Tay, Volodymyr Ivanov, Olena Stabnikova, Jing-Yuan Wang
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Patent number: 7390400Abstract: A denitrification reactor with a culture fixed to an organized plastic-type support is combined with an installation for the nitrification and elimination of the carbon-based pollution The reactor is supplied with a mixture of the raw effluent to be treated and of the effluent originating from the installation for the nitrification and elimination of the carbon-based pollution. The reactor includes two denitrification compartments (3, 4) arranged in parallel and operating altenatingly between a filling phase (denitrification and self cleaning-out of the excess biomass); and an emptying phase (denitrification and drainage of the excess biomass). A system for supplying the mixture of effluents consisting of a rotary arm (11) which alternately supplies the mixture to each of the compartments.Type: GrantFiled: July 27, 2004Date of Patent: June 24, 2008Assignee: Suez EnvironnementInventors: Cédric Geneys, François Virloget
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Patent number: 7384553Abstract: A method for operating an anaerobic ammonium oxidation vessel in anaerobic ammonium oxidation in which ammonium and nitrite in water to be treated are simultaneously denitrified by anaerobic ammonium oxidizing bacteria, the method comprising the steps of: withdrawing a part of the anaerobic ammonium oxidizing bacteria from one anaerobic ammonium oxidation vessel in which the anaerobic ammonium oxidizing bacteria have been acclimatized, and introducing the withdrawn anaerobic ammonium oxidizing bacteria into another anaerobic ammonium oxidation vessel in which acclimatization is to be carried out to perform start-up operation, wherein the anaerobic ammonium oxidizing bacteria having been acclimatized in the one anaerobic ammonium oxidation vessel are provided as microbe-immobilized materials in which the bacteria are attached to and immobilized on immobilizing materials or entrapped and immobilized in immobilizing materials.Type: GrantFiled: June 16, 2005Date of Patent: June 10, 2008Assignee: Hitachi Plant Technologies, Ltd.Inventors: Kazuichi Isaka, Tatsuo Sumino
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Patent number: 7378021Abstract: A wastewater treatment system includes a tidal, sequential vertical flow marsh cell system having at least three marsh cells in serial forward fluid communication. Incoming wastewater to be treated is channeled to at least the first and a second marsh cell, and a portion of water exiting a final marsh cell, to the first marsh cell surface. Each marsh cell is alternately flooded and drained for enhancing aeration of incoming water and marsh cell contents, which include media and plant roots having biofilms growing thereon, the biofilms including a population of nitrifying and denitrifying bacteria, for achieving substantially simultaneous nitrification and denitrification of the wastewater.Type: GrantFiled: April 27, 2007Date of Patent: May 27, 2008Assignee: Worrell Water Technologies, LLCInventors: David C. Austin, Eric Lohan
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Patent number: 7371328Abstract: An animal treatment method comprises flushing the animal waste from a barn to a holding tank where the waste is mixed with an alkaline solution to kill pathogens. After neutralization, the solution is separated into solids and liquids. The liquid is treated and recycled as flushing water to clean the barns and/or drinking water for the animals. The solids are separated into digested and undigested feed. The digested feed is further processed for use as a fertilizer and the undigested feed is processed for use as animal feed.Type: GrantFiled: May 24, 2004Date of Patent: May 13, 2008Assignee: Recovery Systems, Inc.Inventors: Allan E. Hokanson, Christopher S. Williams, Derek Williams
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Patent number: 7347940Abstract: A wastewater treatment process integrates a tidal nitration system with a wastewater treatment lagoon. Raw effluent enters a lagoon having a persistent anoxic or anaerobic state and a long residence time to permit suspended solids to settle to the bottom, forming a blanket of sludge. Water above the sludge blanket is comparatively clearer than raw influent. Discharge from the clear water zone contains organic carbon, organic nitrogen, ammonia, and other nutrients. In the lagoon, complex carbohydrates and fats are broken down into simpler organic compounds by bacterial action, a substantial portion transformed to carbon dioxide by bacterial respiration, reducing BOD. Organic forms of nitrogen are transformed into ammonium ions by bacterial action. Adjacent to the lagoon is a sump that takes water from the clear zone to a tidal cell, and recycles water from the clear zone into the tidal cell, which then discharges back into the lagoon.Type: GrantFiled: April 26, 2005Date of Patent: March 25, 2008Assignee: Worrell Water Technologies, LLCInventor: David C. Austin
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Publication number: 20080053913Abstract: Embodiments include a method and apparatus for cost-effective and efficient nutrient recovery from a waste stream. The nutrients recovered may include ammonia, phosphorous, and/or potassium. The ammonia and phosphorous recovery may be simultaneously accomplished. In some embodiments, ammonia is recovered along with other nutrients using lime or lime-based products.Type: ApplicationFiled: September 6, 2006Publication date: March 6, 2008Inventor: Alexander G. Fassbender
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Publication number: 20080053909Abstract: Embodiments include a method and apparatus for cost-effective and efficient ammonia recovery from a waste stream. In some embodiments, ammonia is recovered after bicarbonate buffer removal from the waste stream via addition of an acid.Type: ApplicationFiled: September 6, 2006Publication date: March 6, 2008Inventor: Alexander G. Fassbender