Patents Examined by Peter A. Hruskoci
  • Patent number: 7935261
    Abstract: A method is provided of recycling and cleaning up oil-based waste drilling mud and cuttings contaminated with oil-based waste drilling mud. A facility for performing the method is also provided. The method includes removing the coarse solids from the mud, breaking the emulsion, separating the hydrophobic phase from the water phase and the solid phase, vaporizing all residual oil and water from the solids, and burning off the vaporized oil. The method produces a solid “soil” product that is free from oil contamination, an oil product that is fit for reuse, and clean air emissions. A thermal desorber can be used to efficiently vaporize the oil at low temperature. Optionally the water fraction of the mud can be vaporized, solutes and salts can be captured as evaporite and then be mixed with the soil product. The method has the unique advantage of producing no persistent hazardous waste.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: May 3, 2011
    Assignee: Arkansas Reclamation Company, LLC
    Inventors: Thomas P. Jones, Richard T. Davis, Charles R. Richesin
  • Patent number: 7931822
    Abstract: Methods and compositions utilizing aluminum, magnesium, and calcium-based additives for the treatment and neutralization of wastewater are described for removing contaminants from wastewater, including reducing phosphorous-containing compounds, total suspended solids (TSS), biological oxygen demand (BOD), fats, oils, and greases (FOG), and total Kjedahl nitrogen (TKN) are described. Methods and compositions to control pH, sulfur and sodium loads present in wastewater and precipitatable solids are described. Concentrations of aluminum, magnesium, and calcium-based additives are maintained at mass action concentrations to the wastewater component levels present in the wastewater and bracketed approximately +/?0.5 pH units about the pK value of the soluble, buffering species.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: April 26, 2011
    Assignee: Inland Environmental Resources, Inc.
    Inventors: Douglas G. Kelley, Richard A. Handley
  • Patent number: 7927496
    Abstract: There is provided a method of inhibiting the development of a biofilm adjacent a surface, the method comprising intermittently applying a biofilm inhibiting substance to a collection of microorganisms having biofilm developing potential. Other embodiments are also described.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: April 19, 2011
    Assignee: A.Y. Laboratories Ltd.
    Inventor: Ayala Barak
  • Patent number: 7927485
    Abstract: A filter system for filtering water and/or wastewater including a sludge blanket clarifier for removing at least some impurities from influent. The sludge blanket clarifier includes a clarifier compartment in which a sludge blanket is to be formed to remove at least some impurities from influent directed into the clarifier compartment and through the sludge blanket. The clarifier compartment has at least one vertical sidewall extending from a bottom of the clarifier compartment to a top of the clarifier compartment. The clarifier compartment has a cross-sectional area that varies over at least a portion of a height of the clarifier compartment such that the velocity of influent just prior to entry into the sludge blanket is less than the velocity of influent just after entering the clarifier compartment.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: April 19, 2011
    Assignee: RG Delaware, Inc.
    Inventors: R. Lee Roberts, Mark Kevin Addison, Karl Michael Kyriss
  • Patent number: 7922897
    Abstract: A fluidized bed reactor for removing phosphorus and nitrogen from wastewater has a column comprising a number of sections. 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: Grant
    Filed: October 13, 2009
    Date of Patent: April 12, 2011
    Assignee: The University of British Columbia
    Inventors: Fred A. Koch, Donald S. Mavinic, Noboru Yonemitsu, Ahren Thomas Britton
  • Patent number: 7906018
    Abstract: A method and apparatus for treating wastewater. The apparatus comprises a reactor having a flow channel generally centrally located in a reactor and immersed in the water or wastewater in the reactor. An agitator is disposed within the flow channel and induces water or wastewater to enter the open upper end thereof and to move downwardly through the flow channel where the water or wastewater is discharged via a flow divider. A reagent is injected into the water or wastewater and the agitator within the flow channel serves to mix the reagent with the water or wastewater passing therethrough and in the process causes at least a slightly turbulent and downward axial flow through the flow channel.
    Type: Grant
    Filed: August 13, 2009
    Date of Patent: March 15, 2011
    Assignee: OTV S.A.
    Inventors: Karim Essemiani, Valery Ursel
  • Patent number: 7906019
    Abstract: A bacteria deactivation device that has a porous medium through which water and bacteria contained in the water, like E. coli and fecal coliform, are passed. Colloidal silver within the medium deactivates bacteria that pass therethrough. The medium has a porosity up to 80% and pores sized to provide flow rates up to 8 liters per hour while meeting Environmental Protection Agency limits for human consumption of silver.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: March 15, 2011
    Inventors: David J. Elliott, Hem K. Pokharel
  • Patent number: 7906029
    Abstract: A differential rate rotary thickener; a power detector which is disposed in a sludge receiver tank for thickened sludge thickened in the differential rate rotary thickener; a discriminator which receives an electric signal for a thickened sludge concentration detected by the power detector and which calculates and discriminate the data; a first controller which receives an instruction signal being a discriminated result in the discriminator and which operates an outer cylinder driving machine and a screw driving machine; a ratio setter which receives a discriminated signal of the discriminator and which increases or decreases a chemical feed rate of flocculant stepwise; and a second controller which receives an instruction signal from the ratio setter and which operates a flocculant-feeding pump are provided. Thickening of sludge is performed by controlling the chemical feed rate, a rotational speed of a screw, and a rotational speed of an outer cylinder screen.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: March 15, 2011
    Assignee: Ishigaki Company Limited
    Inventors: Kenzou Sugaya, Hiroichi Kawasaki, Masayoshi Katayama, Manabu Yamashita, Masaharu Miyawaki
  • Patent number: 7901583
    Abstract: A process in which material comprising an aqueous liquid with dispersed particulate solids is transferred as a fluid to a deposition area, then allowed to stand and rigidify, and in which rigidification is improved while retaining the fluidity of the material during transfer, by combining with the material an effective rigidifying amount of aqueous solution of a water-soluble polymer. The process is particularly suitable for the treatment of the tailings underflow resulting from a mineral processing operation and the co-disposal of fine and coarse tailings fractions. In addition, liquor released during the rigidification step is of high clarity.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: March 8, 2011
    Assignee: Ciba Specialty Chemicals Water Treatments Ltd.
    Inventors: Philip McColl, Stephen Scammell
  • Patent number: 7901571
    Abstract: A flow-through mixing apparatus for incorporating a dry treatment product into a waste stream. The apparatus comprises a pump for directing a liquid waste from a storage pit/tank, a mixer that receives the liquid waste from the pump, and a valve downstream of the mixer for either recirculating the liquid waste back to the storage pit/tank via a recirculation conduit, or directing the liquid waste to a discharge conduit. The mixer comprising a jet nozzle, a venturi tube and a high-shear assembly. The recirculation conduit establishes a calibration loop for determining the appropriate treatment regimen based on the characteristics of the waste liquid. The recirculation conduit also permits the homogenization of the pit/tank contents prior to addition of the dry treatment product. The dry treatment product introduced in the region of the mixer is subjected high shear forces, thereby incorporating the dry treatment product into the waste stream with increased dispersion and reduced agglomeration.
    Type: Grant
    Filed: July 5, 2006
    Date of Patent: March 8, 2011
    Inventors: Roger H. Woods, Doug Pullman
  • Patent number: 7897049
    Abstract: Systems and associated methods for treating contaminant-containing wastewater are provided. The systems generally include a reducing zone for reducing the oxidation-reduction potential of the water and a clean-up zone comprising zero valent iron for removing at least a portion of the contaminant from the contaminant-containing water. The systems are operable to remove one or more contaminants from the contaminant-containing water and are operable for extended durations without clogging due to the formation of iron hydroxides.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: March 1, 2011
    Assignee: Alcoa Inc.
    Inventors: Rajat S. Ghosh, Dennis Fulmer, Kevin Kitzman, John Smith
  • Patent number: 7897052
    Abstract: A method for removing arsenite and arsenate from water is provided. The method comprises reacting the water with cupric oxide (CuO) particles for a predetermined time and filtering the reacted water. A system for removing arsenite and arsenate from liquids is also provided.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: March 1, 2011
    Assignee: University of Wyoming
    Inventor: Katta J. Reddy
  • Patent number: 7892437
    Abstract: A method of managing water is provided, in which the water is discharged from an aggregate plant, and therefore contains a large number of fines. The water is first passed through a mesh screen to remove large particles and then collected in a sump. From the sump the water is pumped to a centrifugal cyclone, where some of the fines are separated from the water. Flocculent is then applied to the water, before the water is collected in a pond.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: February 22, 2011
    Assignee: Allard Contractors Ltd.
    Inventors: Barry Allard, James Allard
  • Patent number: 7892426
    Abstract: A reducing water purification material having a reducing iron-based precipitate selected from green rust, iron ferrite, reducing iron hydroxide, and a mixture thereof. A wastewater treatment process having steps of adding a reducing iron compound to wastewater, leading the wastewater to which the reducing iron compound is added to a reaction tank and forming a precipitate, separating the formed precipitate by a solid-liquid separation to obtain a sludge, and alkalinizing all or a portion of the separated sludge to form an alkaline sludge followed by returning to the reaction tank, wherein in the precipitation step, the wastewater to which the reducing iron compound is added and the alkaline sludge are mixed and are allowed to react in a non-oxidizing atmosphere under alkaline condition to form a reducing iron compound precipitate as the precipitate, thereby incorporating contaminants in the precipitate to remove the contaminants from the wastewater.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: February 22, 2011
    Assignee: Mitsubishi Materials Corporation
    Inventors: Hiroshi Hayashi, Hitoshi Takeuchi, Hajime Negishi, Shigeyuki Tsuzaki, Yoshio Aikawa, Ayako Mimoto, Shintaro Nakaya
  • Patent number: 7875189
    Abstract: The invention relates to a method for separating suspended solid materials from aqueous systems, in which the latter is mixed with a flocculant made of polymer colloidal particles with cationic surface charge and subsequently the flocculated material is separated from the aqueous system.
    Type: Grant
    Filed: March 3, 2006
    Date of Patent: January 25, 2011
    Assignees: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V., Leibniz-Institut fur Polymerforschung Dresden e.V.
    Inventors: Werner Jaeger, Bernd-Reiner Paulke, Simona Schwarz, Mandy Mende
  • Patent number: 7875191
    Abstract: A two part biocide composition containing metal ions and bromine donor for killing microorganisms in a body of water and a method of killing microorganisms in a body of water by placing both metal ions and a bromine in the body of water to allow use of lower concentrations of bromine than if bromine were used alone as a biocide.
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: January 25, 2011
    Assignee: King Technology, Inc
    Inventors: Joseph A. King, Marlin Frank
  • Patent number: 7875188
    Abstract: A process in which a suspension comprising dispersed particulate material in an aqueous medium is transferred as a fluid to a deposition area, then allowed to stand and rigidify, and in which rigidification is improved whilst retaining the fluidity of the suspension during transfer, by combining with the suspension during transfer a rigidifying amount of a treatment system which comprises i) a water-soluble synthetic polymer and ii) a water-soluble natural or seminatural polymer. Improved rigidification can be achieved, including dose efficiency especially in regard to the amount of synthetic polymer required. In addition improvements in the clarity of liquor released from the suspension can be achieved.
    Type: Grant
    Filed: May 4, 2007
    Date of Patent: January 25, 2011
    Assignee: BASF SE
    Inventors: Brian Dymond, John Lamperd, Angela Beveridge
  • Patent number: 7867400
    Abstract: A process of separating suspended solids from a fermentation liquor by subjecting the liquor to a solids-liquid separation stage, wherein the fermentation liquor is produced in a fermentation process for the production of a fermentation product, and which liquor comprises lignin, wherein the solids-liquid separation stage is assisted by a treatment system, characterised in that the treatment system comprises an anionic polymer, with the proviso that the treatment system and does not include a cationic polymer having an intrinsic viscosity (IV) of at least 4 dl/g.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: January 11, 2011
    Assignee: Ciba Speacialty Chemicals Water treaments Ltd.
    Inventors: Jonathan Hughes, Rajesh Mistry, Kenneth Charles Symes
  • Patent number: 7867399
    Abstract: A method is provided of recycling and decontaminating oil-based waste drilling mud and cuttings contaminated with oil-based waste drilling mud. A facility for performing the method is also provided. The method includes removing the coarse solids from the mud, breaking the emulsion, and separating the hydrophobic phase from the water phase and the solid phase. The solids may then be treated by either or both of two approaches. One approach involves vaporizing all residual oil and water from the solids, and burning off the vaporized oil. Another approach involves at least partially vaporizing the residual oil from the solids and recondensing the oil. The method produces a solid “soil” product that is free from oil contamination (or is sufficiently decontaminated to allow reuse), an oil product that is fit for reuse, and clean air emissions. A thermal desorber or a soil dryer can be used to efficiently vaporize the oil at low temperature.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: January 11, 2011
    Assignee: Arkansas Reclamation Company, LLC
    Inventors: Thomas P. Jones, Charles R. Richesin, Richard T. Davis
  • Patent number: 7862727
    Abstract: A method and composition for processing natural water such as seawater, brackish, and estuarine water wherein the water is concentrated with or without heating comprising adding to the water (I) a water-soluble polymeric phosphonate and (II) a water-soluble polycarboxylate to control scale formation and deposition. Optionally a water -soluble poly[isopropenylphosphonic acid] can also be utilized as component (I) without the addition of component (II).
    Type: Grant
    Filed: September 24, 2004
    Date of Patent: January 4, 2011
    Assignee: General Electric Company
    Inventors: Nicholas R. Blandford, Libardo A. Perez, William S. Carey