Generating Gas In Situ Patents (Class 210/707)
  • Patent number: 9321663
    Abstract: Oily and/or solids-containing water is clarified by chemical treatment to form flocculated and agglomerated solid phases and a clear water phase. In the clarification process, microbubbles of air or other gas are introduced at atmospheric pressure, via an eductor or other suitable device, together with a flocculant. During the subsequent formation of floes and their agglomeration into larger masses, microbubbles become entrained within and adhered to the solid flocculated materials. The resulting masses are very buoyant and easily separated from the water via a variety of approaches that include skimming, decanting, filtration, and screening. This process results in a solids phase that may be disposed of as waste, if desired, and a highly clarified water phase.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: April 26, 2016
    Assignee: Aquero Company, LLC
    Inventors: C. Steven Sikes, T. Daniel Sikes, Mark A. Hochwalt
  • Patent number: 9108160
    Abstract: Apparatus and methods for enhanced electrocoagulation processing using enhanced membrane aeration are disclosed for effluent treatment. The apparatus has an enrichment means for establishing an ion rich air/gas stream and a membrane aerator for receiving the ionized air/gas stream and effluent to be treated. An ionized air/gas rich effluent feed stream flows out of the membrane aerator and is received at an electrocoagulation processing assembly for diffused ion enhanced electrocoagulation treatment.
    Type: Grant
    Filed: March 3, 2014
    Date of Patent: August 18, 2015
    Assignee: Rockwater Resource, LLC
    Inventors: Reginald A. Wiemers, Robert Kohlheb, Peter H. Zahn
  • Patent number: 8926838
    Abstract: A process for the treatment of contaminated fluid and wastewater containing residuals from food processing and waste and residuals from animal feeding operations and effluent from the digestion of these residuals is disclosed. The process is carried out in an enclosed tank using a separation procedure that maintains the state of the separated solids in the same state as they were upon introduction to the system, i.e., aerobic, anaerobic or anoxic, based on the condition of the solids upon introduction to the system. The system utilizes rotary flow instead of rakes to harvest the solids from the effluent. The process has applications in the recovery of emulsion in wastewater treatment and the operation of digesters for re-feeding to the digester.
    Type: Grant
    Filed: February 9, 2008
    Date of Patent: January 6, 2015
    Assignee: Environmental Stewardship Solutions
    Inventor: Mark Stoermann
  • Patent number: 8460555
    Abstract: This invention reveals to the public the centralized sump oil and acid oil treatment process and system. The process consist of (1) the filter; (2) entry to reaction kettle, the sodium carbonate solution added at the time of air floatation till PH value keeps about 6.0-8.0; and emulsion splitter and flocculating agent added for further reaction; (3) suspension of air floatation and static settlement; (4) the international crude oil is collected after the detergent oil at the upper level of the reaction kettle is dehydrated under normal and reduced pressure; the wastewater is drained after filtering by the natural oil removal tank and the oil-water filter; the sludge is solidified by the cement and the quick lime and aluminium oxide are used as the coagulant aid for solidifying the sludge.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: June 11, 2013
    Inventor: Gang Yuan
  • Publication number: 20130118988
    Abstract: A multistage dissolved air flotation and advanced oxidation (MDAF-AO) system/method with multi-functions in oil recovery, solids removal, emulsion breaking, and advanced oxidation. Influent, with oil and suspended solids, enters a first stage for oil recovery includes a gas ionizer and an air dissolving pump. A second stage includes of two coagulation/flotation compartments connected in serial to enhance solids removal efficiencies. Micro air bubbles are created by air dissolving pumps in each compartment. A third stage is for the emulsion breaking unit to further remove or recover the emulsified oils. A fourth stage includes advanced oxidation by using ultraviolet (UV) and hydrogen peroxide to oxidize and disinfect the bacteria and microorganisms.
    Type: Application
    Filed: November 9, 2012
    Publication date: May 16, 2013
  • Publication number: 20130068696
    Abstract: A method and system of treatment of agricultural and industrial wastewaters that contain high concentrations of suspended solids, nitrogen, and phosphorus compounds is disclosed. The method and system includes pre-treating the wastewater, controlling the amount of coagulants used, and controlling the mean velocity used for mixing, surface loading rate, and solids loading rate. The method and system functions as a sedimentation unit and gas flotation unit (solid/liquid separator). The pH of the effluent wastewater is stabilized within the separator by ensuring that there is sufficient alkalinity to buffer the wastewater. Sufficient gas is produced in the coagulation reactions to float and concentrate the solids, which results in as high as 99 percent reduction in suspended solids, a 96 percent reduction of the phosphorus concentration, and a 50 percent reduction of the nitrogen concentration in the effluent from the separator.
    Type: Application
    Filed: March 21, 2012
    Publication date: March 21, 2013
    Applicant: Farm Pilot Project Coordination, Inc.
    Inventors: Robert P. Carnahan, Christopher C. Tubbs, Nidal Samad
  • Patent number: 8366938
    Abstract: The invention relates to a method and a device for purifying liquid effluents, in which water is separated from substances by performing, in a single vertical enclosure (3), a vertical bubbling in the effluents fed at a flow rate d. The enclosure has a free surface and includes at least two compartments (4, 5, 6, 7) communicating together for enabling a circulation between the compartments successively from the top to the bottom and from the bottom to the top between the lower portion thereof and a medium level at a flow rate D at least three times higher than the flow rate d. The supernatant phase is continuously discharged and a hydraulic or gaseous chemical oxidation of said effluents is simultaneously carried out in the same enclosure, the chemical oxidation rate and the bubble flow rate and size being selected in order to progressively obtain a separation of the solid/liquid and liquid/liquid phases at the surface of the enclosure for obtaining a COD below a predetermined threshold.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: February 5, 2013
    Assignee: Orege, Societe a Responsabilite Limitee
    Inventors: Patrice Capeau, Michel Lopez, Pascal Gendrot
  • 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
  • Patent number: 7914686
    Abstract: A process using an electrical signal for electrokinetic floatation of solids and semi-solids in paint sludge water includes collecting the paint sludge water into a tank. The process further includes generating the electrical signal from a bottom of the tank to separate the solids and semi-solids from the water in the paint sludge water to induce electrokinetic floatation of the solids and semi-solids to a top surface in the tank. After separating the solids and semi-solids from the water, the process includes removing the solids and semi-solids from the tank.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: March 29, 2011
    Assignee: Chrysler Group LLC
    Inventors: Faiz Yono, Julie Q Shang, Gary George, Shelley Sullivan, Mitra S Sioshansi
  • Patent number: 7670493
    Abstract: A mobile apparatus and method of operation for the pretreatment of wastewater to remove and concentrate fats, oils, grease and settled solids using vacuum flotation and a clarifier and returning the pretreated wastewater to the source structure, tank or sewer system. The vacuum flotation process is enhanced by injecting hydrogen peroxide to increase the dissolved oxygen concentration and a cationic emulsion polymer as a coagulant to the wastewater prior to removal into the vacuum flotation tank by vacuum pumping.
    Type: Grant
    Filed: December 26, 2006
    Date of Patent: March 2, 2010
    Inventor: David John Bolam
  • Patent number: 7651620
    Abstract: The inventive nozzle comprises a first releasing stage (1) for producing a pre-release by absorbing from 5 to 20% of available pressure, a second releasing stage (2) wherein a substantial release is carried out and the pressurised water passes from a saturation pressure to an output nozzle pressure, an intermediate chamber (3) in the form of a transition chamber in which the pressurised water approaches the saturation pressure by absorbing from 5 to 30% of the available pressure and an outlet tube (3) consisting of a sudden release and cavitation confinement tube whose minimum length (1) substantially corresponds to a distance separating the end of said tube on the second release stage side from a readhesion point of jets to the tube wall at the angle of divergence (alpha) thereof ranging from 3 to 12 DEG before readhesion.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: January 26, 2010
    Assignee: Degremont
    Inventor: Patrick Vion
  • Patent number: 7156999
    Abstract: A method of treating animal manure yielding a final liquid fraction and solid fractions whereby the final liquid fraction has a suspended solids (SS) content of about 3 g/L or lower comprising subjecting at least a part of said manure to a first biological passive flotation step in a flotation unit having a hydraulic residency time (HRT) of about 4 to about 24 hours with a polymer to yield a first flotation solid fraction and a first flotation liquid fraction, said method comprising a further treatment.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: January 2, 2007
    Assignee: Institut National de la Recherche Scientifique
    Inventors: Jean-François Blais, Guy Mercier, Geneviève Bélanger, Myriam Chartier, Danielle Leblanc
  • Patent number: 6649067
    Abstract: A flotation method in which the gas bubbles for inducing flotation of the solids in the liquid are produced by a chemical reaction, for example a decomposition of hydrogen peroxide to oxygen and water, induced by catalytic action. The catalyst is on the walls of the flotation reaction and the substance to be flotated is introduced tangentially and caused to flow downwardly and thus upwardly in the reactor.
    Type: Grant
    Filed: September 24, 2002
    Date of Patent: November 18, 2003
    Assignee: Forschungszentrum Julich GmbH
    Inventor: Horst Overath
  • Publication number: 20030019814
    Abstract: A flotation method in which the gas bubbles for inducing flotation of the solids in the liquid are produced by a chemical reaction, for example a decomposition of hydrogen peroxide to oxygen and water, induced by catalytic action. The catalyst is on the walls of the flotation reaction and the substance to be flotated is introduced tangentially and caused to flow downwardly and thus upwardly in the reactor.
    Type: Application
    Filed: September 24, 2002
    Publication date: January 30, 2003
    Inventor: Horst Overath
  • Patent number: 6475384
    Abstract: The invention relates to a flotation method and a flotation reactor. The invention provides a method and a device, wherein the formation of the gas bubbles needed for flotation are produced by catalytic reaction of a chemical substance, i.e. H2O2, thereby saving energy and reducing the number of compressors. Flocculation also occurs in a tangential flow in the funnel-shaped expansion (12) of an admission pipe (8) so that a flocculation basin with a stirrer is no longer required.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: November 5, 2002
    Assignee: Forschungszentrum Julich GmbH
    Inventor: Horst Overath
  • Patent number: 6350380
    Abstract: A method for treating in situ large bodies of water contaminated with heavy metals and having varying density stratas to immobilize the contaminant metals is disclosed. The method, or process for in situ immobilization of metals is focused on treating large bodies of water having metals therein that are also adjacent a border of soil or earthen materials in an attempt to immobilize the metals from penetrating through the soil. Initially, the density mean of the body of water is determined, which is densest typical at regions at or approaching 4 degrees C.
    Type: Grant
    Filed: October 3, 2000
    Date of Patent: February 26, 2002
    Inventor: Joseph G. Harrington
  • Patent number: 5741426
    Abstract: A method and apparatus for treatment of contaminated water, containing undesired solid, liquid, and/or gaseous materials includes an electro-floculation means for disassociating ions from the undesired solid material and from the contaminated water, and further includes a separation tower having various deflection means deflecting undesired solid materials downwardly through to the separation tower.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: April 21, 1998
    Inventors: Derald L. McCabe, Jack K. Helm
  • Patent number: 5702612
    Abstract: A flotation method and apparatus for separating a selected constituent from an effluent of an industrial process is provided. The apparatus includes a conditioning tank and a flotation cell. The conditioning tank allows mixing a flotation reagent with an effluent and includes a mechanism for also dissolving gas in the effluent within the conditioning tank. The flotation cell includes a dissolved gas flotation chamber having an overflow for recovering the selected constituent and a tailings drain. In addition, the flotation cell also includes an added gas flotation chamber having a sparger for injecting gas into the effluent, an overflow for recovering the selected constituent and a tailings drain.
    Type: Grant
    Filed: July 20, 1995
    Date of Patent: December 30, 1997
    Assignee: University of Kentucky Research Foundation
    Inventor: Xiang-Huai Wang
  • Patent number: 5512171
    Abstract: This invention relates to a separator device for the separation of fine particles from a contaminated liquid. The device utilizes the process of electrolysis to produce small gas bubbles which attach themselves to the fine particles and move the particles to the top of the liquid surface where they can be easily removed. The separation is facilitated by the use of baffles which prevent the formation of convection currents in the body of the separator device, and by inclined plates which direct the rising particles towards the removal point.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: April 30, 1996
    Inventors: Saleam Essop, Allen G. Bullard
  • Patent number: 5510039
    Abstract: The method serves for the separation of solid materials out of a suspension and is, as a rule, implemented as a floatation method. The suspension (S) to be clarified is added tangentially from the outside at the periphery of a substantially cylindrical clarification volume (1). Damaging flow phenomena, such as for instance turbulence, are removed to the largest possible extent by flow means (2) which are applied prior to the entry of the suspension into the clarification volume so that an optimal flow takes place in the clarification volume (1). The flow is fed to the center of the clarification volume in a substantially spiral path (4), wherein the scum (6), which receives the materials to be separated out, forms on the surface. Various apparatuses for performing the method are proposed.
    Type: Grant
    Filed: April 15, 1994
    Date of Patent: April 23, 1996
    Assignee: Sulzer-Escher Wyss GmbH
    Inventors: Wolfgang Bassler, Eckhard Gutsmuths, Hans Kleinschnittger, Wolfgang Mannes
  • Patent number: 5275732
    Abstract: A high rate multi-stage bubble separation process is developed for: (a) initially generating coarse gas bubbles with diameters greater than 80 microns in turbulent hydraulic condition to mix an influent water with chemicals, enzymes, microorganisms, or combinations thereof, to produce chemical flocs, biological flocs or both, and to strip volatile contaminants from water; (b) subsequently terminating coarse gas bubbles and generating extremely fine gas bubbles with diameters smaller than 80 microns in laminar hydraulic condition to float suspended, oily and surface-active contaminants together with said chemical flocs and said biological flocs from water, to settle heavy contaminants from water, and to produce a clarified effluent water, a floating scum, and a sludge; (c) terminating the fine gas bubbles and discharging the clarified effluent water; (d) discharging the floating scum and the sludge upon demand; and (e) optionally collecting and treating an emitted gas stream resulting from said coarse gas bubb
    Type: Grant
    Filed: December 2, 1992
    Date of Patent: January 4, 1994
    Assignee: International Environmental Systems, Inc., USA
    Inventors: Lawrence K. Wang, Lubomyr Kurylko, Mu Hao S. Wang
  • Patent number: 5240600
    Abstract: A biological treatment system involving the use of a gas dissolving pressure vessel, a pressurized water release assembly, a pretreatment chamber, a bioreactor, an open vessel, a post-treatment unit, a sludge removal unit, and a removable gas collection and purification unit for both wastewater treatment and air emission control is described. Gases are dissolved efficiently in a water inside the pressure vessel under controlled high pressure and high rotating velocity. Chemicals, or microorganisms, or both arm dosed to an influent water producing a pretreated water containing chemical flocs and biological flocs. The bioreactor comprising a hanging biological contactor is adopted when biochemical reaction is intended. A pressurized water containing supersaturated gases is produced in the pressure vessel and than depressurized through the pressurized water release assembly becoming a depressurized water containing micro bubbles.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: August 31, 1993
    Assignee: International Environmental Systems, Inc., USA
    Inventors: Lawrence K. Wang, Lubomyr Kurylko, Mu H. S. Wang
  • Patent number: 5176835
    Abstract: An apparatus and method for the continuous clarifying of liquids containing suspended solid substances comprises a flotation cell with a liquid head height of less than 1 meter, with a ratio between the liquid head and the cell diameter comprised between 0.25 and 0.05. The cell has a bottom axial inlet for liquid to be clarified, supersaturated with gas, so as to generate an axial ascending current of the liquid to be clarified with radial divarication toward the surface of the liquid head. A framework associated with the cell rotates concentrically with respect thereto and supports a spillway unit for collecting the flotated layer and a scraper unit which affects all the wet surfaces of the cell. A discharge outlet is furthermore provided in the lower part of the cell for the outflow of clarified liquid which falls toward the bottom of the cell.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: January 5, 1993
    Assignee: Fabio Perletti
    Inventor: Fabio Perletti
  • Patent number: 5167806
    Abstract: An improved gas dissolving and releasing liquid treatment system involving the use of multi-stages gas dissolving pressure vessel and the use of a pressurized water release assembly and an open vessel is described. The gas dissolving and releasing liquid treatment system includes a liquid pressure pump, a pressure vessel, a gas injector, an inlet nozzle assembly, a gas compressor, gas regulators, gas flow meters, pressure gauges, a safety valve, a bleed-off point, feeders, pumps, a pressurized water release unit, a liquid flow meter, an open vessel, sludge removal means, and air emission control means. More than one gases introduced at different inlets are dissolved simultaneously and efficiently in the pressure vessel under controlled high pressure and high rotating velocity. The improved liquid treatment system is compact, simple and cost-effective, and is applied to ozonation, chlorination, recarbonation, oxygenation, bio-oxidation, nitrogenation, aeration, and flotation processes.
    Type: Grant
    Filed: May 29, 1991
    Date of Patent: December 1, 1992
    Assignee: International Environmental Systems, Inc.
    Inventors: Lawrence K. Wang, Lubomyr Kurylko, Mu H. S. Wang
  • Patent number: 5160438
    Abstract: A unique bubble production system and method for sampling and cleaning la regions of "dirty" or polluted bodies of water, or for otherwise sampling them for other biological activity. This is achieved by the use of millions to trillions of tiny chemical coated particles which are usually dispersed in air by suitable means to effect predetermined patterns of the particles and resultant bubble region as they descend in the water. The particular character of the particles and their selected dispersal mode assure the homogeneous generation of large concentrations of millions to trillions of bubbles throughout a predetermined volume of the water body so as to generate a planned and controlled bubble spectra for a selected applicational purpose. A bubble spectrum is a plot of the number of bubbles per volume as a function of bubble diameter.
    Type: Grant
    Filed: December 28, 1990
    Date of Patent: November 3, 1992
    Assignee: The United States of American as represented by the Secretary of the Navy
    Inventor: Richard M. Detsch
  • Patent number: 4913826
    Abstract: Treatment of poultry processing plant waste water in dissolved air flotation unit and/or grease trap with hydrogen peroxide.
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: April 3, 1990
    Assignee: Degussa Aktiengesellschaft
    Inventors: Det Mannig, Gerd Scherer
  • Patent number: 4769154
    Abstract: A method for oxidation treatment of waste water material containing organic solid particles includes forming a discrete batch of waste water material, adjusting the pH of the entire batch to close to 7 or acid-alkaline neutral, and then flowing the batch through a reactor along with chlorine gas. The chlorine produces hypochlorous acid, which produces nascent oxygen and hypochlorite ions, for chemically oxidizing the organic solid particles and also forming minute gas bubbles, including nitrogen and carbon dioxide, which adhere to the particles. The treated material is flowed into a separation receptacle, where the gas bubble buoyed particles float to the surface of the water. The clear water is rapidly gravity-drained from beneath the particles, leaving the particles coalesced into a relatively dry, disinfected or stabilized sludge.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: September 6, 1988
    Assignee: Waste Water Management, Inc.
    Inventors: William D. Saylor, Milton K. Foss, Robert A. Schmid
  • Patent number: 4724045
    Abstract: A process for the decolorization of alkaline pulp such as that derived from paper waste water wherein the waste water is contacted with a strong mineral acid, contacted with a coagulated agent and then the solid coagulum is separated and neutralized to liquify the color bodies in concentrated form.
    Type: Grant
    Filed: September 3, 1986
    Date of Patent: February 9, 1988
    Assignee: Stone Container Corp.
    Inventor: Charles S. Ackel
  • Patent number: 4681682
    Abstract: A clarifier is provided with an elongated settling tank having an inlet at one end, an outlet at the opposite end, a generator producing air saturated liquid released near the inlet end of the tank to float lighter sludge to the top of the tank, suction heads removing settled out heavier sludge from the bottom of the tank, skimmers pushing scum or foam floating on top of the liquid in the tank to the overflow outlet near the inlet end of the tank, a travelling bridge moving the suction heads along the length of the tank, elongated outlets for clarified liquid projecting into the tank from the discharge end thereof, and outlets at different levels for discharge of clarified effluent and recirculating effluent. The recirculating effluent is pumped to a mixing device to be saturated with air and the air saturated effluent is discharged back into the inlet end of the tank.
    Type: Grant
    Filed: July 26, 1983
    Date of Patent: July 21, 1987
    Assignee: Alar Engineering Corporation
    Inventors: Harold R. White, Alex J. Doncer
  • Patent number: 4417985
    Abstract: Industrial waters containing dissolved or suspended contaminants are treated by turbulently mixing the contaminated water with a composition comprising a discontinuous phase of gas in the form of spherical bubbles having a narrowly distributed size of at least about 12 microns and each encapsulated in a double surfaced hydration layer containing water and a soluble surfactant having a HLB ratio greater than about 10, the encapsulated gas bubbles being dispersed in a continuous water phase and each having on the outer surface of the hydration layer a layer of collector ions active to react with the contaminants. The surfactant is present in an amount to stabilize the bubbles and to impart to the hydration layer sufficient thickness and viscosity to retard migration of the collector ions through the hydration layer for a period of time sufficient to enable the collector ions to react with the contaminants and cause nucleation thereof directly at the surface layers of the bubbles.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: November 29, 1983
    Inventor: James Keane
  • Patent number: 4267050
    Abstract: BOD-containing water is purified by oxygenation. The resulting sludge is subjected to flotation with a gas having a solubility in water higher than that of air.The preferred source of high solubility gas is the vent gas from the oxygenation zone or stack gas obtained by burning methane generated by anaerobically digesting the floated solids.Removal of insoluble contaminants from bacterial or bacterial-algal pond effluent using high solubility gas flotation is also disclosed.
    Type: Grant
    Filed: March 21, 1979
    Date of Patent: May 12, 1981
    Assignee: Union Carbide Corporation
    Inventors: Richard A. Conway, Robert F. Nelson