Including Organic Agent Patents (Class 210/727)
  • Patent number: 10252259
    Abstract: Ion exchange resin macroporous beads for the highly selective extraction of univalent anions from aqueous solutions. A specific example is the removal of dicyanoaurate and dicyanoargentate from cyanide leach solutions and tailings. The beads have a maximum number of ligands specific for the desired univalent anion, while maintaining sufficient separation to minimize binding of polyvalent ions. The beads are prepared using a functionalized monomer with the use of a specifically tuned coordinator. The beads can be used as a sensor for detecting the amount of anions captured when interrogated by an appropriate light source.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: April 9, 2019
    Assignee: TechSource, Inc.
    Inventor: George M Murray
  • Patent number: 10245358
    Abstract: Body-fluid containers, methods, and systems are presented that include a container that has a container housing formed, at least in part, by a liquid-impermeable, vapor-permeable material. The liquid-impermeable, vapor-permeable material allows water to evaporate and be transmitted outside of the container. The evaporation allows more fluid to be processed by the container than the container could otherwise hold. Other systems, methods, and apparatuses are presented.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: April 2, 2019
    Assignee: KCI Licensing, Inc.
    Inventors: Christopher Brian Locke, Aidan Marcus Tout, Timothy Mark Robinson
  • Patent number: 10053611
    Abstract: A method includes adding a clay to water to form a suspension of clay in water, the clay including pieces of clay having an average diameter of at least 2 ?m; adding a dispersant to the suspension of clay in water to form a drilling fluid; and injecting the drilling fluid into a well. In the drilling fluid, the dispersant interacts with the clay to form nanoscale particles of clay having an average diameter of less than 500 nm.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: August 21, 2018
    Assignee: Saudi Arabian Oil Company
    Inventors: Abdullah Saleh Hussain Al-Yami, Vikrant Bhavanishankar Wagle, Ziad Abdullrahman Saleh AlAbdullatif, Faramak Almassi, Abdulaziz S. Bubshait, Ali Mohammed Hussain Al Safran
  • Patent number: 9963365
    Abstract: A dewatering process comprises dispersing an anionic polymer flocculant in a slurry comprising water and oil sands fine tailings to form flocs comprising fines bridged by the anionic polymer flocculant. A cationic polymer flocculant is subsequently dispersed in the flocculated slurry to further flocculate the flocs and form floc aggregates. The floc aggregates comprise flocs bridged by the cationic polymer flocculant. The floc aggregates are then compressed to remove water and form a dewatered compact. A system is also provided for the dewatering processes using inline mixtures and a filter press.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: May 8, 2018
    Assignee: Ecolab USA Inc.
    Inventors: William T. Duttlinger, Jr., Anoop Chengara, Kimberly Jantunen Cross, Anthony G. Sommese
  • Patent number: 9834730
    Abstract: Methods and compositions for flocculating solids are provided. The solids may be suspended in an organic liquid medium and a water in oil emulsion may be added to the liquid medium. The water in oil emulsion includes an emulsion polymer capable of flocculating the solids suspended in the organic liquid medium. The emulsion polymer may be added to the organic liquid medium in an inactive form and the polymer may subsequently become activated upon contacting the organic liquid medium. Once activated, the polymer may flocculate the suspended solids.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: December 5, 2017
    Assignee: ECOLAB USA INC.
    Inventors: Anoop Chengara, Jordan Montag
  • Patent number: 9790111
    Abstract: Disclosed is a method for thickening or dehydrating sludge, which includes at least: a) a step of adding flocculants to the sludge to be treated; b) a step of flocculation by agitation of the sludge with the flocculants thus added in order to form a mixture of flocks and an aqueous solution; c) a step of mechanical separation of the flocks and the aqueous solution formed during the preceding step; d) a step of recovering the aqueous solution and the flocks that make up a treated sludge; wherein: the added flocculants are made up of at least one cationic starch (S) and at least one cationic polyacrylamide (P); the cationic starch or starches (S) including a fixed weight percentage of nitrogen of at least 2%; and the weight ratio (R) ws/(ws+wp), expressed as solids, is included between 0.6 and 0.99.
    Type: Grant
    Filed: November 28, 2013
    Date of Patent: October 17, 2017
    Assignee: Roquette Freres
    Inventors: Laura Crowther-Alwyn, Medhi Carre, Michel Simon
  • Patent number: 9656189
    Abstract: A process for dewatering oil sands tailings is provided, comprising providing a tailings feed having a solids content in the range of about 10 wt % to about 45 wt %; adding a flocculant to the tailings feed and mixing the tailings feed and flocculant to form flocs; and centrifuging the flocculated tailings feed to produce a centrate having a solids content of less than about 3 wt % and a cake having a solids content of at least about 50 wt %.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: May 23, 2017
    Assignee: SYNCRUDE CANADA LTD.
    Inventors: Jonathan Spence, Barry Bara, Jim Lorentz, Randy Mikula, Jiwon Lee, Richard Daniel Lahaie
  • Patent number: 9546102
    Abstract: A single step pretreatment of wastewater or recreational water is provided comprising treatment with nanocomposites consisting of an anchoring particle such as a clay mineral and one or more polymers.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: January 17, 2017
    Assignee: GAVISH-GALILEE BIO APPLICATIONS LTD.
    Inventor: Giora Rytwo
  • Patent number: 9434628
    Abstract: A sulfurous acid/lime alkalinization pre-treatment sequential filtration method for industrial wastewaters containing colloids of starch, milk, whey, and other similar acting organic components to condition and remove a number of chemicals/pharmaceuticals and heavy metals before the treated filtrate is land applied or undergoes further biological nitrogen reduction for open stream discharge via anaerobic and aerobic treatment.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: September 6, 2016
    Assignee: Earth Renaissance Technologies, LLC
    Inventor: Marcus G. Theodore
  • Patent number: 9422609
    Abstract: A composition-of-matter for use in water treatment, composed of a water-insoluble matrix and one or more amidohydrolase, such as cyanuric acid amidohydrolase, incorporated in or on the matrix, is disclosed. Also disclosed are devices containing same and methods utilizing same for water treatment. The water treatment is effected by an enzymatically-catalyzed reduction of the concentration of an amide-containing compound, such as cyanuric acid, found in chlorinated water of swimming polls, spas and other similar structures.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: August 23, 2016
    Inventor: Vivian I. Teichberg
  • Patent number: 9345821
    Abstract: Reduced-pressure sources, systems, and methods involve using a vacuum pump that is disposed within a sealed space to produce reduced pressure. The exhaust from the vacuum pump is exhausted from the sealed space through pores in an enclosure member that is made of a polymeric, porous, hydrophobic material. Other devices, systems, and methods are disclosed.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: May 24, 2016
    Assignee: KCI Licensing, Inc.
    Inventors: Christopher Brian Locke, Timothy Mark Robinson, Richard Daniel John Coulthard
  • Patent number: 9284206
    Abstract: 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: Grant
    Filed: November 8, 2012
    Date of Patent: March 15, 2016
    Inventor: Michael Presutti
  • Patent number: 9051200
    Abstract: A disk roll base material includes 20 to 38 wt % of alumina silicate wool that include 40 to 60 wt % of alumina and 40 to 60 wt % of silica, and have a content of shots having a dimension of 45 ?m or more of 5 wt % or less, 10 to 30 wt % of kibushi clay, 2 to 20 wt % of bentonite, and 20 to 40 wt % of mica.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: June 9, 2015
    Assignee: NICHIAS CORPORATION
    Inventors: Kazuhisa Watanabe, Masaaki Nakayama, Osamu Horiuchi
  • Publication number: 20150053621
    Abstract: Provided are a method for treating water and a flocculant used in the method. The method includes the steps of adding a first polymer compound formed by multiply binding a first repeating unit into water to be treated, and adding a second polymer compound formed by multiply binding a second repeating unit into the water. The first repeating unit includes a first linked main chain which constructs a main chain via repeatedly bound one another, and an adsorption site directly or indirectly bound to the first linked main chain so as to adsorb organic compounds contained in the water to be treated. The second repeating unit has a similar structure to the first repeating unit except that the number of carbon atoms in the second linked main chain is different from that in the first linked main chain. The flocculant includes the first and second polymer compounds.
    Type: Application
    Filed: August 19, 2014
    Publication date: February 26, 2015
    Applicant: Hitachi, Ltd.
    Inventors: Kenji OKISHIRO, Satoshi ISHII, Hiroshi SASAKI
  • Publication number: 20150034562
    Abstract: A method for dewatering dispersions of suspended solids by flocculation, using a polymeric flocculant, includes the steps of sequentially adding to the dispersions: at least one water soluble, anionic linear polymer having a molecular weight of at least 1×106 g/mol; and a blend of a water-soluble, cationic structured first polymer having a molecular weight of at least 1×106 g/mol, and a water-soluble, cationic linear second polymer having a molecular weight of at least 1×106 g/mol.
    Type: Application
    Filed: July 31, 2013
    Publication date: February 5, 2015
    Inventors: Kirk THOMAS, Patrick BAIR
  • Publication number: 20150034563
    Abstract: Dewatering agents and methods of dewatering wastewater slurries are provided. Also disclosed are methods for improving the separation of solids from water. The water may be produced water, raw water, or wastewater, for example. The dewatering agents can be in solutions and the dewatering agent solutions may include flocculants, soy based components, and surfactants. The soy based components can include, for example, soy flour and soy protein.
    Type: Application
    Filed: July 31, 2013
    Publication date: February 5, 2015
    Applicant: ECOLAB USA INC.
    Inventors: Prasad Duggirala, Weiguo Cheng, Darlington Mlambo
  • Patent number: 8945402
    Abstract: One embodiment of the invention disclosed is an apparatus for separating a solid material from a mixture containing oil, water, clay, sand, soil and drill cuttings. The apparatus comprise a series of processing cells and wash tanks. Hydrocyclonic devices are also used to further purify the solid mixture for disposal.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: February 3, 2015
    Inventor: Larry Saik
  • Patent number: 8945394
    Abstract: Disclosed herein are systems and methods for removing fine particulate matter from a fluid, comprising a separator that separates an inflow fluid stream into an overflow fluid path and an underflow fluid path, where the underflow fluid path is treated with a tethering material that attaches to the coarse particulate matter to form tether-bearing anchor particles and where the overflow fluid path is treated with an activating material so that the activating material interacts with the fine particulate matter to form activated particles. After these treatments, the underflow fluid path containing the tether-bearing anchor particles is commingled with the overflow fluid path containing the activated particles, so that a removable complex is produced that can be removed in a settling facility, thereby removing the fine particulate matter from the fluid.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: February 3, 2015
    Assignee: Soane Energy, LLC
    Inventors: Patrick D. Kincaid, Robert P. Mahoney, David Soane
  • Publication number: 20150001160
    Abstract: A multi stage process for the progressive removal of protein and isolating streams containing cellulose fibers and oil from a waste stream containing Dried Distillers Grains with Solubles is disclosed. Targeted polymers are added to the source and separated streams prior to passing the streams through separation equipment including a rotary screen, a multi disk press, a dissolved air floatation device and optionally a centrifuge in which the waste stream is separated into a stream containing predominantly protein, a stream containing predominantly oil and a stream that contains predominantly cellulose and hemicellulose fibers.
    Type: Application
    Filed: February 26, 2014
    Publication date: January 1, 2015
    Inventor: Aicardo Roa-Espinosa
  • Publication number: 20140346111
    Abstract: In a seawater treatment method in which after seawater is coagulated by a coagulant and is processed by a solid-liquid separation treatment, an RO treatment is performed, RO feed water having a good water quality is obtained by a small addition amount of the coagulant, and by the RO treatment of the RO feed water, a stable RO treatment can be performed over a long period of time. In a seawater treatment method which is a pretreatment method performed prior to a membrane separation treatment of seawater, after a cationic organic flocculant and/or an inorganic coagulant is added to seawater to conduct a reaction, a coagulation treatment is performed by addition of an alkaline solution of a high molecular weight compound which has a phenolic hydroxide and which is insolubilized under a high salt concentration, and a solid-liquid separation treatment is then performed. Subsequently, this treated water is desalinated by a membrane separation treatment.
    Type: Application
    Filed: December 25, 2012
    Publication date: November 27, 2014
    Applicant: KURITA WATER INDUSTRIES LTD.
    Inventors: Yasuhiro Oi, Tomoya Iuchi
  • Publication number: 20140319069
    Abstract: A method for removing submicron colloidal particulates, such as hydrocarbons, from water. The method includes first adding a soluble, cationic polymer, such as chitosan, a salt, or solution of chitosan to water containing the submicron particulates and a halogenating agent, followed by adding a soluble, anionic polymer or anionic salt to the water. The resulting flocs are filtered to remove the submicron particulates.
    Type: Application
    Filed: April 30, 2014
    Publication date: October 30, 2014
    Applicant: HALOSOURCE, INC.
    Inventors: Everett J. Nichols, Jeffrey F. Williams, James R. Scott, Christine M. Palczewski
  • Patent number: 8858802
    Abstract: Methods of deoiling oily water such as SAGD and frac produce water. The oily water is treated with a natural coagulant selected from tannins and chitosan. A cationic and/or anionic flocculant may also be added to the treated oily water. The thus treated oily water may be subjected to conventional mechanical oil separation techniques such as hydrocyclonic separation, dissolved air flotation, entrapped air flotation, induced gas flotation, gravity filters, reverse osmosis filters, API, or Voraxial® bulk separators and the like.
    Type: Grant
    Filed: December 18, 2009
    Date of Patent: October 14, 2014
    Assignee: General Electric Company
    Inventors: David M. Polizzotti, Abdul Rafi Khwaja
  • Publication number: 20140284519
    Abstract: The invention relates to a process for the purification of water and/or dewatering of sludges and/or sediments, to the use of a surface-treated calcium carbonate for water purification and/or dewatering of sludges and/or sediments, as well as to the use of a surface-treated calcium carbonate for reducing the amount of polymeric flocculation aids in water and/or sludges and/or sediments and to a composite material comprising a surface-treated calcium carbonate and impurities originated from different sources obtainable by said process.
    Type: Application
    Filed: October 30, 2012
    Publication date: September 25, 2014
    Inventors: Daniel E. Gerard, Hans-Georg Hartan, Joachim Schoelkopf, Michael Skovby, Patrick A.C. Gane
  • Patent number: 8834725
    Abstract: A process for treating acid mine drainage containing heavy metals and soluble contaminants is provided. In one embodiment, at least a metal cation is added to the acid mine drainage at a pre-select pH to form insoluble heavy metal complexes. In one embodiment, the metal cation is a trivalent metal ion, e.g., ferric iron such as in ferric sulfate. In another embodiment, a divalent metal ion such as in ferrous sulfate is used. After the removal of the heavy metal complexes, the effluent water is treated with at least a phosphate additive to remove remaining soluble contaminants, thus producing a treated water stream with reduced levels of contaminants.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: September 16, 2014
    Assignee: Chevron U.S.A. Inc.
    Inventors: Rahul Shankar Bhaduri, Alexander Kuperman, Michael Dubrovsky
  • Patent number: 8808547
    Abstract: A process removes boron from ion exchange system regeneration solution including introducing a borate precipitator into the regeneration solution in a precipitation zone to generate borate precipitate; introducing a coagulator into the regeneration solution that coagulates solids and/or borate precipitate generated by the borate precipitator and absorbs boron into the solids; introducing the regeneration solution, solids and borate precipitate into a separation zone; introducing anionic polymer into the regeneration solution adjacent to or in the separation zone to increase the propensity of borate precipitate and solids to separate from the regeneration solution; and filtering the regeneration solution to remove residual suspended solids from the regeneration solution.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: August 19, 2014
    Assignee: Infilco Degremont, Inc.
    Inventor: Michael L. Pudvay
  • Publication number: 20140166586
    Abstract: Lysine-based polymers, particularly copolymers of lysine and maleic acid, are useful as coagulants for clarification of wastewaters, including produced waters from oils sands mining operations. They can be advantageously used in combination with commercial coagulants, and in combination with flocculants. Such combinations may include dry blends. Also described are methods of preparation of lysine homopolymers and copolymers.
    Type: Application
    Filed: April 28, 2011
    Publication date: June 19, 2014
    Inventor: C. Steven Sikes
  • Publication number: 20140117273
    Abstract: A method uses anionic and cationic polymers added in, any order or simultaneously, to aqueous media for the removal of substances. The sequential addition of the two biopolymers, anionic xanthan, followed by cationic chitosan, causes the rapid formation of very large and cohesive fibrillar aggregates that may exhibit high solids to liquid ratios and that quickly settle out from the aqueous media. The aqueous media can be easily separated from the large fibrillar aggregates by settling under gravity or by filtration through a porous containment device, such as a synthetic or non-synthetic woven or non-woven fabric including a geotextile fabric or a solid containment device containing a solid mesh screen.
    Type: Application
    Filed: January 3, 2014
    Publication date: May 1, 2014
    Applicant: HALOSOURCE, INC.
    Inventors: Everett J. Nichols, James R. Scott, Jeffrey F. Williams, Yongjun Chen
  • Patent number: 8580917
    Abstract: The invention relates to block polymers, for example, arborescent copolymer compounds, and to methods of making and purifying such compounds. In one embodiment, the invention relates to arborescent polymer compounds that contain one or more styrene polymeric blocks in combination with one or more isobutylene polymeric blocks. In another embodiment, the invention relates to methods for purifying arborescent polymer compounds that contain at least one styrene polymeric block in combination with at least one isobutylene polymeric block.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: November 12, 2013
    Assignee: The University of Akron
    Inventor: Judit E Puskas
  • Patent number: 8506822
    Abstract: A process of concentrating an aqueous suspension of solid particles comprising the steps of adding at least one organic polymeric flocculant to the suspension thereby forming flocculated solids in which the flocculated solids are allowed form a layer of solids and thereby forming a more concentrated suspension in which the process comprises the addition of an effective amount of an agent that is selected from the group consisting of free radical agents, oxidizing agents, enzymes and radiation, in which the agent is applied to the suspension prior to or substantially simultaneously with adding the organic polymeric flocculant and/or the organic polymeric flocculant is added to the suspension in a vessel and the agent is applied to the suspension in the same vessel. The process is particularly suitable for solids liquid separation in which the flocculated solids are allowed to settle by sedimentation in a gravity thickener.
    Type: Grant
    Filed: December 8, 2011
    Date of Patent: August 13, 2013
    Assignee: BASF SE
    Inventors: Gillian Moody, Anthony Allen, Stephen Adkins, Brian Dymond, Paul Stocks
  • Patent number: 8480907
    Abstract: The invention relates to a method for the floatation-clarification of difficult water, in particular heavily polluted surface water, urban or industrial wastewater, rainwater or any type of water that floats with difficulty, particularly water which contains a high percentage of mineral matter or requires the injection of a flocculation aid and which originates from filters or membrane technologies such as ultrafiltration, said method comprising: a coagulation step (A1) in which a dose of coagulant (1) is injected into the water to be treated; a flocculation step (B) in which flocculant (2) is injected (B1) into the water after the coagulation step, in order to agglomerate the suspended particles in the form of flocs; and subsequently a floatation step (C) in which the flocculated water is mixed with an emulsion of air micro-bubbles in a floatation apparatus. A second coagulant injection step (A2) is performed downstream of the flocculant injection (B1) and upstream of the floatation (C).
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: July 9, 2013
    Assignee: Degremont
    Inventors: Patrick Vion, Céline Broutin, Christian Garriou
  • Publication number: 20130168318
    Abstract: Method for treating water by ballasted flocculation comprising a step for injecting into said water at least a flocculent, a step for injecting into said water at least one particulate material that is denser than water, and a step for retrieving treated water, characterised in that said ballasted flocculation is performed under agitating at a mean speed gradient between 100 and 1400 s?1 and in that said flocculent consists of at least one natural carbohydrate polymer having an anionic charge density between ?900 and ?4000 ?eq/g.
    Type: Application
    Filed: April 18, 2011
    Publication date: July 4, 2013
    Applicant: VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORT
    Inventors: Celine Levecq, Philippe Sauvignet
  • Publication number: 20130153510
    Abstract: The invention relates to a method and system for treating an aqueous stream having a first flow rate and containing solid matter exhibiting first settling properties, the method comprising adding a modifying agent to the aqueous stream at an addition rate sufficient to change the first settling properties of the aqueous stream to obtain a modified aqueous stream having solid matter exhibiting second settling properties different from the first settling properties; taking batchwise samples of the modified aqueous stream to a settling vessel having a volume; determining a settling property of the solid matter of the samples in the settling vessel; and conducting the modified aqueous stream to a separation unit in which solid matter is separated from the modified aqueous stream. The invention provides a convenient way of monitoring and/or controlling aqueous streams conducted for example to purification processes.
    Type: Application
    Filed: July 19, 2011
    Publication date: June 20, 2013
    Applicant: KEMIRA OYJ
    Inventors: Kaj Jansson, Iiris Joensuu, Marjatta Piironen, Jukka-Pekka Sirviö, Tapio Yrjänäinen
  • Publication number: 20130112627
    Abstract: The invention provides methods and compositions for improving the rheology of red mud removed from Bayer Process liquor. The method includes adding a flocculant and a cross-linked polysaccharide to the liquor. This combination separates the red mud from the liquor but also prevents the red mud from becoming too thick. By preventing excessive thickness, the method allows for the formation of extremely dense amounts of red mud even in primary settlers because the dense red mud can still flow. As a result a user can simultaneously enjoy both easy handling of red mud and also high recovery rates of valuable alumina and caustic from the red mud.
    Type: Application
    Filed: December 28, 2012
    Publication date: May 9, 2013
    Inventors: Carl Urbani, John D. Kildea, Ryan Chester, Jing Wang
  • Patent number: 8435412
    Abstract: The present application relates to a process of color neutralizing treatment liquids, wherein the treatment liquid comprises a chromophore selected from the group consisting of monoazo, triarylmethane, xanthene, anthraquinone, hydrophobic dyes, and mixtures thereof, wherein the hydrophobic dyes are selected from the group consisting of benzodifuranes; methine; triphenylmethanes; naphthalimides; pyrazole; naphthoquinone; mono-azo, di-azo dyes and mixtures thereof, said process comprising the steps of: i. providing a mixing vessel with the treatment composition comprising the chromophore; ii. providing to the mixing vessel more than 0.045% of a reducing agent selected from the group consisting of sulfite, thiodiurea, formaldehyde bisulfite formaldehyde sulfoxilate and mixtures thereof; and iii. mixing until discolouration by color neutralization of the chromophore is achieved.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: May 7, 2013
    Assignee: The Procter & Gamble Company
    Inventors: Suzanne Khalaf, Olga Vladimirovna Pryadilova, Regine Labeque
  • Publication number: 20130075341
    Abstract: Methods are described for removing contaminates from aqueous industrial wastewater process streams, specifically industrial laundries to yield a less contaminated aqueous effluent for discharge to a sewer and reduce the sludge generated therefrom. A premixed medium/high molecular weight and medium/high charged cationic coagulant solution polymer and an inorganic aluminum species is added to the wastewater, and after at least a two second delay, a high molecular weight highly charged anionic flocculent is injected into the wastewater which reduces sludge generation, while maintaining or exceeding effluent quality. Also, no coagulant, flocculent or sludge aids are needed to attain the results and the sludge can be dewatered in a plate and frame press.
    Type: Application
    Filed: June 7, 2012
    Publication date: March 28, 2013
    Inventors: Robert Davis, Stuart Davis
  • Patent number: 8383764
    Abstract: The invention relates to block polymers, for example, arborescent copolymer compounds, and to methods of making and purifying such compounds. In one embodiment, the invention relates to arborescent polymer compounds that contain one or more styrene polymeric blocks in combination with one or more isobutylene polymeric blocks. In another embodiment, the invention relates to methods for purifying arborescent polymer compounds that contain at least one styrene polymeric block in combination with at least one isobutylene polymeric block.
    Type: Grant
    Filed: May 17, 2007
    Date of Patent: February 26, 2013
    Assignee: The University of Akron
    Inventor: Judit E. Puskas
  • Patent number: 8353641
    Abstract: Disclosed herein are systems for removing particulate matter from a fluid, comprising a particle functionalized by attachment of at least one activating group or amine functional group, wherein the modified particle complexes with the particulate matter within the fluid to form a removable complex therein. The particulate matter has preferably been contacted, complexed or reacted with a tethering agent. The system is particularly advantageous to removing particulate matter from a tailing solution.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: January 15, 2013
    Assignee: Soane Energy, LLC
    Inventors: Michael C. Berg, John H. Dise, Kevin T. Petersen, David Soane, Kristoffer K. Stokes, William Ware, Jr., Atul C. Thakrar
  • Patent number: 8349188
    Abstract: Disclosed herein are systems for removing particulate matter from a fluid, comprising a particle functionalized by attachment of at least one activating group or amine functional group, wherein the modified particle complexes with the particulate matter within the fluid to form a removable complex therein. The particulate matter has preferably been contacted, complexed or reacted with a tethering agent. The system is particularly advantageous to removing particulate matter from a fluid waste stream following mining or ore processing operations.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: January 8, 2013
    Assignee: Soane Mining, LLC
    Inventors: David Soane, William Ware, Jr., Robert P. Mahoney, Nathan Ashcraft
  • Patent number: 8323509
    Abstract: A method of rehabilitation of a deposition area to render it suitable for plant growth comprising a particulate mineral material, which particulate mineral material has been dewatered from a suspension of said material, comprising the steps of transferring the suspension of particulate mineral material as a fluid to the deposition area, and in which the suspension is allowed to stand and dewater at the deposition area to form a dewatered particulate mineral material, wherein the rehabilitation of the disposal area is achieved by adding a dewatering amount of a polymer to the suspension of the particulate mineral material while it is being transferred as a fluid to the deposition area, wherein the polymer is either a synthetic water-soluble polymer formed from one or more ethylenically unsaturated monomers having an intrinsic viscosity of at least 4 dl/g or a water-soluble polymer that is a natural polymer or semi natural polymer.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: December 4, 2012
    Assignee: BASF SE
    Inventors: Brian Dymond, John Gerard Bellwood
  • Patent number: 8303823
    Abstract: Nanoscale additives and methodology for their use during polymer-aided sludge dewatering to increase the dewatering efficiency compared to traditionally used polymer-only dewatering processes. The nanoscale additive increases the percent solids in the dewatered cake compared to polymer-only treatment. When the nanoscale additives are added, the centrifugal force (shear) required to obtain high percent solids can be significantly reduced and the optimum polymer dose required for effective dewatering is also significantly reduced.
    Type: Grant
    Filed: February 9, 2010
    Date of Patent: November 6, 2012
    Assignees: NEI, Corp and Kennedy, Jenks Consultants Inc.
    Inventors: Ganesh Skandan, Runqing Ou, Rajagopalan Ganesh
  • Patent number: 8282835
    Abstract: The invention provides a method of efficiently removing selenium from water. The method involves: adding an oxidant to the liquid, adjusting the liquid's pH to below 7.5, adding ferric salt in an amount such that less than a quarter of selenium in the liquid precipitates and adding a poly dithiocarbamate material to the liquid in an amount such that the amount of poly dithiocarbamate material (in ppm) is greater than the amount of ferric salt (in ppm). This method removes far more selenium than previous methods, and does it using a smaller amount of expensive chemicals. Moreover this method makes it far more likely to achieve cost effective compliance with the ever-increasing environmental standards for selenium in water.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: October 9, 2012
    Assignee: Nalco Company
    Inventors: Daniel E. Schwarz, Jitendra T. Shah
  • Publication number: 20120217201
    Abstract: A mixture for treating water in a biological water treatment process is provided comprising an organic-based flocculant, a micronutrient; and a polymer. The flocculant, the micronutrient and the polymer are mixed in a predetermined ratio to enhance said biological water treatment. The mixture is particularly suited to enhancing flocculation of particles, reducing fouling on a surface of a membrane in a membrane bioreactor, improving uptake of phosphorous and/or nitrogen by a biomass in a biological water treatment system, improving bioactivity of a biomass and/or floc in a biological water treatment system and improving flux in a membrane bioreactor.
    Type: Application
    Filed: October 6, 2010
    Publication date: August 30, 2012
    Applicant: UNIVERSITY OF TECHNOLOGY, SYDNEY
    Inventors: Huu Hao Ngo, Wenshan Guo
  • Patent number: 8182698
    Abstract: A chemical process to improve the filtration performance for the removal of gypsum from phosphoric acid/gypsum slurry using a filtration aid that is selected from a class of polymers, lower molecular weight anionic polyelectrolytes, which previously have not been used for this application. The polymer is CMC or Carboxymethyl Cellulose, which is a polymerized cellulose ether. CMC is found to be extremely effective for phosphoric acid/gypsum slurry that was produced from igneous phosphate rock. CMC is also available in food grade, which is novel for filtration aids for the production of phosphoric acid which may be used for human or animal feed.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: May 22, 2012
    Assignee: ARR-MAZ Custom Chemicals, Inc.
    Inventor: Louis Irwin
  • Patent number: 8147651
    Abstract: Methods to control and suppress odor in papermaking sludge are described. One method involves admixing sludge from a papermaking process and cyclodextrin to provide treated sludge with the cyclodextrin present in an effective amount to control odors in the treated sludge. The deodorized sludge may be used as a component of resin-wood composite products, such as composite decking materials, walls, flooring, casting forms, and the like.
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: April 3, 2012
    Assignee: Buckman Laboratories International, Inc.
    Inventors: Gerald M. Dykstra, James N. Graham, Scott D. Branum
  • Patent number: 8147696
    Abstract: A method for purifying a water process stream whereby a precipitating agent is added to the water process stream to elevate the process stream pH to at least 10.5 to drop out precipitates which form separated solids comprising at least one of calcium precipitate, magnesium precipitate, barium precipitate, strontium precipitate, and silica precipitate. The separated solids are then coagulated and removed from the water process stream so as to yield a purified water process stream.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: April 3, 2012
    Inventor: Ken V. Pandya
  • Patent number: 8147695
    Abstract: 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: Grant
    Filed: October 26, 2010
    Date of Patent: April 3, 2012
    Assignee: I. Kruger Inc.
    Inventors: Kashi Banerjee, Charles D. Blumenschein, John Charles Schrader
  • Patent number: 8147703
    Abstract: The invention relates to a method for processing sludge, comprising the addition of a lime-based basic agent to a sludge having a first pH value in order to raise the pH to a second value higher than the first one, adding at least one anionic organic flocculating agent that is active at said second pH value, flocculating the sludge, and separating the flocculated sludge between dehydrated sludge and a liquid phase, wherein the sludge to be dehydrated has a first above-mentioned pH value lower than 9, while the lime-based basic agent induces said pH raise to said above-mentioned second value within less than 5 minutes. The invention also relates to a composition for implementing said processing.
    Type: Grant
    Filed: November 13, 2007
    Date of Patent: April 3, 2012
    Assignee: S.A. Lhoist Recherche et Developpement
    Inventor: Marc Joseph Henri Remy
  • Patent number: 8137566
    Abstract: A method of treating tailings comprising a solids fraction and a hydrocarbon fraction is disclosed. A primary flow is supplied to a jet pump, the primary flow comprising water and less than 20% solids by mass. A secondary flow is supplied to a mixing chamber of the jet pump, the secondary flow comprising a slurry of water and tailings, the slurry comprising more solids by mass than the primary flow. The jet pump is operated using the primary flow such that the tailings are agitated to effect at least a partial phase separation of the hydrocarbon fraction from the tailings. The methods disclosed herein may also be applied to treat tailings ponds.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: March 20, 2012
    Assignee: RJ Oil Sands Inc.
    Inventors: Wade Ralph Bozak, Michael A. Kessick, Roderick Michael Facey
  • Patent number: 8119011
    Abstract: Substitution of a single Ga-atom or single Ge-atom (GaAl12 and GeAl12 respectively) into the center of an aluminum Keggin polycation (Al13) produces an optimal water-treatment product for neutralization and coagulation of anionic contaminants in water. GaAl12 consistently shows ˜1 order of magnitude increase in pathogen reduction, compared to Al13. At a concentration of 2 ppm, GaAl12 performs equivalently to 40 ppm alum, removing ˜90% of the dissolved organic material. The substituted GaAl12 product also offers extended shelf-life and consistent performance. We also synthesized a related polyaluminum chloride compound made of pre-hydrolyzed dissolved alumina clusters of [GaO4Al12(OH)24(H2O)12]7+.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: February 21, 2012
    Assignee: Sandia Corporation
    Inventors: May D. Nyman, Thomas A. Stewart
  • Patent number: 8101085
    Abstract: Described is a process for treating an animal husbandry effluent slurry, such as hog manure, containing suspended solid particles. The process includes a) providing a liquid portion of the effluent, b) diluting the liquid to a Newtonian fluid, c) assuring the pH is under 10, d) adding to the fluid i) a soluble salt of alkaline earth metal (e.g. CaCl2) and ii) an insoluble basic salt of the same alkaline earth metal (e.g. CaCO3) to balance available cations and promote agglomeration of the suspended solid particles, e) adding a cationic coagulant to obtain a pre-treated destabilized colloid mixture with zero zeta potential value, and f) performing electroflotation to obtain a treated liquid and floated solids.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: January 24, 2012
    Assignee: Agriculture and Agri-Food Canada
    Inventors: Simon Guertin, Daniel Massé, François Lamarche