Patents Examined by Thomas Wyse
  • Patent number: 5543039
    Abstract: A method for water purification in which waste water is fed into a reactor containing carriers having a biofilm which promotes a desired conversion of impurities, using carriers which are particulate elements having a larger surface than smooth elements of the same dimension and having a density in the range 0.90 to 1.20, normally 0.92 till 0.98, particularly 0.92 to 9.96 kg/dm.sup.3, wherein the carriers with biofilm are kept suspended in the water in a reactor for aerobic, anoxic or anaerobic water purification, comprising inlet and outlet tubes and optionally mixing means, and containing a large number of carriers for biofilm. This reactor is also comprised by the present invention.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: August 6, 1996
    Assignee: Kaldnes Miljoteknologi A/S
    Inventor: Hallvard Odegaard
  • Patent number: 5543052
    Abstract: Tis invention relates to a process for reducing the concentration of an organic pollutant such as phenol in an aqueous stream which comprises passing the stream through a bioreacter containing a plurality of biologically active particles comprising a hydrophobic polyurethane substrate having an effective amount of one or more aerobic microorganism capable of metabolizing at least one of said organic materials on; in or on and in said substrate in the absence or in the substantial absence of a carbon absorbent.
    Type: Grant
    Filed: March 9, 1995
    Date of Patent: August 6, 1996
    Assignee: AlliedSignal Inc.
    Inventors: Francis S. Lupton, William G. Sheridan, Marion R. Surgi
  • Patent number: 5534143
    Abstract: A microbubble generator is disclosed for optimizing the rate and amount of xygen transfer to microbial inocula or biocatalysts in bioreactor systems. The microbubble generator, and an associated immobilized cell reactor, are useful in the detoxification and cleanup of non-volatile polymeric and volatile organic-contaminated aqueous streams. In particular, they are useful in the continuous mineralization and biodegradation of toxic organic compounds, including volatile organic compounds, associated with industrial and municipal effluents, emissions, and ground water and other aqueous discharges. One embodiment of the invention includes a microbubble chamber packed with small inert particles through which a liquid effluent and oxygen or another gas are admitted under pressure, followed by a venturi chamber to further reduce the size of bubbles.
    Type: Grant
    Filed: January 25, 1995
    Date of Patent: July 9, 1996
    Assignee: Louisiana State University Board of Supervisors, a Governing body of Louisiana State University Agricultural and Mechanical College
    Inventors: Ralph J. Portier, Huazhong Mao
  • Patent number: 5531897
    Abstract: A dynamic bed reactor is disclosed in which a compressible open cell foam matrix is periodically compressed and expanded to move a liquid or fluid through the matrix. In preferred embodiments, the matrix contains an active material such as an enzyme, biological cell, chelating agent, oligonucleotide, adsorbent or other material that acts upon the liquid or fluid passing through the matrix. The active material may be physically immobilized in the matrix, or attached by covalent or ionic bonds. Microbeads, substantially all of which have diameters less than 50 microns, can be used to immobilize the active material in the matrix and further improve reactor efficiency. A particularly preferred matrix is made of open cell polyurethane foam, which adsorbs pollutants such as polychlorophenol or o-nitrophenol.
    Type: Grant
    Filed: October 13, 1992
    Date of Patent: July 2, 1996
    Assignee: Idaho Research Foundation, Inc.
    Inventor: Keith E. Stormo
  • Patent number: 5522989
    Abstract: A method for aerating waste water, wherein the interface area between air and waste water is enlarged by splashing the water by means of blades and wherein the sludge present in the waste water is kept in suspension by creating flows and/or turbulence in the water. The waste water is set in motion by moving a plurality of blades arranged in a circle through the waste water, in such a manner that the connecting parts interconnecting the blades substantially do not extend into the waste water. The device for aerating waste water is provided with a container for waste water and with a rotor being rotatable about a substantially vertical axis, whose portion pointing downwards may extend into the waste water. The rotor comprises blades having surfaces which are substantially radially and axially oriented, whereby the blade surfaces are at least partially located below the rotor parts interconnecting the blades so that the connecting parts substantially do not extend into the waste water.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: June 4, 1996
    Assignee: Hubert B.V.
    Inventor: Dirk T. Hove
  • Patent number: 5522985
    Abstract: This invention relates to remedial bacterial systems in a constructive mat including ensiliaged material, particularly constructed mixed microbial mats for specific bioremedial applications. Preferably, the constructed mixed microbial mat comprises ensiled grass clippings with a cyanobacteria and a chemotrophic bacteria.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: June 4, 1996
    Assignee: Microbial & Aquatic Treatment Systems, Inc.
    Inventors: Judith A. Bender, Peter C. Phillips
  • Patent number: 5514278
    Abstract: A multistage biological treatment method receives material to be treated, and passes the material through multiple reactors. From each reactor some of the contents are removed and separated, and the biomass is moved into the previous stage while the material to be treated and metabolic products are moved into the succeeding stage. Thus, the predominant flow of the biomass is upstream and the predominant flow of the material to be treated in downstream. Preferably, alternate reactors are anaerobic, and alternate reactors are aerobic, so the material is alternately subjected to anaerobic, then aerobic, environments. The process can be improved by applying physical, physical-chemical, chemical, and biochemical actions to the treatment system.
    Type: Grant
    Filed: January 13, 1994
    Date of Patent: May 7, 1996
    Inventor: Boris M. Khudenko
  • Patent number: 5510033
    Abstract: The method and apparatus of the present invention feature the use of and electric current to induce movement of bacteria in situ to degrade contaminants in aquifers.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: April 23, 1996
    Assignee: Envirogen, Inc.
    Inventors: Burt D. Ensley, Mary F. DeFlaun
  • Patent number: 5507946
    Abstract: A process for treating wastewater containing insoluble solid waste material and soluble solid waste material including the following series of steps: (1) controlling the oxygen content of the wastewater to a level at which growth of anaerobic bacteria is substantially eliminated, (2) separating the insoluble solid waste material from the wastewater, (3) treating the soluble solid material in the wastewater with a predetermined amount of aerobic bacteria, and (4) reducing the amount of aerobic bacteria in the wastewater. The insoluble solid waste material separated from the wastewater can be burned to produce electrical energy. Apparatus for carrying out the process are also disclosed.
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: April 16, 1996
    Assignee: PEC Research, Inc.
    Inventor: Donald M. Stearns
  • Patent number: 5505848
    Abstract: There is disclosed a fermentation device having a peripherally extending wall, a gas-impermeable cover extending over the surface of the device, and attached at its peripheral edge to a top part of the wall, and a gas collection conduit extending for at least part of the periphery of the device within the wall. This device may be used for wastewater treatment enclosures.
    Type: Grant
    Filed: September 22, 1993
    Date of Patent: April 9, 1996
    Assignee: ADI Limited
    Inventors: Robert Landine, Claude De Garie, Albert Cocci
  • Patent number: 5503748
    Abstract: A batch wastewater treatment process using a novel sequencing batch air-lift reactor (SBALR) and upflow sludge blanket is described. The static Fill step of the sequencing batch process has an upflow feed of wastewater through an upflow sludge blanket element. This step is followed by Aerated React, Settle, and Draw steps, all of which steps are confined to the single reactor. Reactor performance is excellent with a mean COD removal rate of 99.6%, mean final effluent suspended solids of 4.9 mg/l, and sludge volume index of 67.2 ml/g. Gas hold-up and mass transfer coefficient over a range of suspended solids values are representative of conventional and high-rate activated sludge treatment processes, as well aerobic digesters. The SBALR reactor meets the oxygen demand needed for both the activated sludge and aerobic digestion process.
    Type: Grant
    Filed: August 20, 1993
    Date of Patent: April 2, 1996
    Inventors: Jose C. Merchuk, Marc H. Siegel, Asher Brenner
  • Patent number: 5503738
    Abstract: This invention relates to a process for remediating vaporous pollutants which comprises passing a vaporous stream containing one or more of pollutants through a bioreactor, the bioreactor comprising a plurality of biologically active bodies, the biologically active body comprising a macroporous substrate and one or more of microorganisms capable of remediating one or more of said pollutants, wherein the substrate is fabricated from a decomposition-resistant material. The present invention further provides an apparatus for this process.
    Type: Grant
    Filed: September 2, 1994
    Date of Patent: April 2, 1996
    Assignee: AlliedSignal Inc.
    Inventors: Louis J. DeFilippi, Francis S. Lupton, Mansour Mashayekhi
  • Patent number: 5501800
    Abstract: The treatment of water to remove gas vacuolate cyanobacteria is effected by subjecting the water to a predetermined pressure by being pumped down a centrally located pipe in a bore-hole, which is steel lined. This causes the gas vesicles in the cyanobacteria to collapse. The treated water is then stored in a settling tank where the cyanobacteria sink to the bottom and can be removed along with any other sediment in the water. The method can be applied to decrease the amount of cyanobacteria with gas vesicles in a lake or other water impoundment. (FIG.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: March 26, 1996
    Inventors: Keith B. Clarke, Anthony E. Walsby
  • Patent number: 5501802
    Abstract: Persulfates are used to provide water clarity when organic sanitizers such as biguanides are utilized for sanitizing recreational waters. Persulfate applications of 2 ppm or more can be used. Additionally, maintenance applications of the persulfate or the bisulfate can be used.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: March 26, 1996
    Assignee: FMC Corporation
    Inventors: Dean S. Thorp, Frank E. Caropreso, Robert H. Tieckelmann, Donald Lapham, III
  • Patent number: 5500111
    Abstract: A bacteria-supporting medium of synthetic resin has a spiral shape with a relatively small pitch, and comprises plural S-shaped portions continuous with each other and defined at outer boundarios by a continuous winding line. Each S-shaped portion extends radially, and includes an upwardly-expanding part and a downwardly-expanding part. These parts are tapered toward a central opening.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: March 19, 1996
    Inventor: Yasuo Fujino
  • Patent number: 5500123
    Abstract: A process for improved methane production by two-phase anaerobic digestion of organic carbonaceous material in which organic carbonaceous material is fermented under anaerobic conditions in an acid phase digester, forming a liquid/solids effluent, the liquid/solids effluent is fermented under anaerobic conditions in a methane phase digester, product gas comprising methane is withdrawn from the methane phase digester, and oxygen is introduced into the methane phase digester. In a preferred embodiment, the methane phase liquid effluent is passed through a CO.sub.2 stripper resulting in stripping of CO.sub.2 and H.sub.2 S from the methane phase liquid effluent. The resulting stripper liquid effluent comprising dissolved oxygen is then recycled back to the methane phase digester.
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: March 19, 1996
    Assignee: Institute of Gas Technology
    Inventor: Vipul J. Srivastava
  • Patent number: 5500112
    Abstract: Effluent to be treated is introduced into the top of a first bioreactor 10 through an inlet pipe 16 and, after passing through second and third bioreactors 11 and 12, passes through a settling device 17, the treated effluent then flowing over a depth control weir 18 into an outlet pipe 19. The three bioreactors 10, 11 and 12 and the settling device 17 are housed in a tank having three sets of vertically-staggered transverse partitions 21, 22, 23 and a transverse settling tank partition 24. Each set of staggered partitions 21, 22 and 23 are arranged so that the bioreactors are interconnected in series, the effluent preferably being constrained to pass downwardly through each matrix 13, 14, 15 in turn against an upward discharge of very fine air bubbles from aeration panels 28 which extend under substantially the whole of each matrix. Aerobic bacteria feeds on nutrients in the effluent and grows on the roughened walls of the cross-flow matrix and the air bubbles promote sloughing of the bacteria.
    Type: Grant
    Filed: June 9, 1995
    Date of Patent: March 19, 1996
    Inventor: Alistair J. McDonald
  • Patent number: 5496469
    Abstract: A system for the reduction and separation of highly emulsified and/or immiscible components mixed in a fluid, particularly useful for treating waste water contaminated with oils and oily emulsions, as from depleted oil wells, vehicle washing stations, and meat rendering plants. The system is operative for reducing the amount of organic and inorganic contaminants, and is particularly suitable for reducing the amount of oil, with oil-consuming microorganisms, and separating oil that is not consumed within the system from the water so that the oil may be recycled and the water discharged into wetlands or sanitary sewers without further treatment. The system comprises a multi-stage, recirculating series of treatment tanks. In a first stage, the fluid is recirculated through a treatment loop where the fluid is aerated and then passed through a coalescer.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: March 5, 1996
    Inventors: Charles R. Scraggs, Jack R. Creel, Alonzo L. DeCell
  • Patent number: 5494580
    Abstract: Method of decontamination of a hydrocarbon-polluted environment by the use of bacterial compositions. The method is a process of biological decomposition of the hydrocarbons using, as decontaminating active ingredients, bacterial compositions composed of one or more strains from among the following microorganisms: Azotobacter vinelandii 21, Pseudomonas sp.9, Pseudomonas sp.19, Pseudomonas sp.31 and Acinetobacter calcoaceticus 23. In the method, prior analysis of the chemical composition of the pollutants is essential in order to select, in accordance with this composition, the mixture of strains of the most active microorganisms from among the five mentioned above, taking into account the natural conditions of the polluted environment. The bacterial composition also contains inorganic salts supplying N and P, and additives needed for bacterial growth.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: February 27, 1996
    Assignee: Baltic General Investment Corporation
    Inventors: Egidijus V. Baskys, Saulius Grigiskis, Kestutis Vilutis
  • Patent number: 5494581
    Abstract: A process for the treatment of water or other liquid has a plurality of stationary surfaces on which microorganisms or like biologically active materials are fixed or grown which are contacted alternately with air and the liquid undergoing treatment by raising and lowering the liquid. This leads to purification by biological oxidation and other processes. Apparatus for performing the process comprises a tank containing arrays of plates and a wave generator for generating a wave action of liquid in the tank by means of which the alternate raising and lowering of the liquid is achieved. Beneficially the wavelength of the wave motion is arranged such that the tank length is 1/2, 1 or n times the wavelength where 2.times.n is an integer.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: February 27, 1996
    Assignee: WRc p.l.c.
    Inventor: John A. Hobson