Patents Examined by Thomas Wyse
  • Patent number: 5490933
    Abstract: This invention relates to a self-regulated apparatus and method for extracting biodegradable and/or strippable constituents from a fluid stream by the action of biomass which consumes or degrades such substances or by gas stripping. Such self-regulation permits the monitoring and optimization of the bioactivity of the system and the overall degree of treatment of the fluid stream.
    Type: Grant
    Filed: March 17, 1994
    Date of Patent: February 13, 1996
    Assignee: The Dow Chemical Company
    Inventors: Mark A. LaPack, Terry J. Nestrick, William F. Martin, Gary M. Klecka
  • Patent number: 5490934
    Abstract: A process for providing biological denitrification of a previously nitrified wastewater includes the initial step of supplying to a tank an influent including a relatively small concentration of biomass and a fraction of nitrates. The influent is supplied adjacent a bottom of the tank, and a volume of waste water is retained in the tank. This volume in the tank has a biomass concentration greater than the influent biomass concentration, and the biomass in the tank provides biological denitrification of the wastewater during movement of the wastewater through the tank. Effluent is delivered from the tank, and includes a biomass concentration substantially equal to the influent biomass concentration and is substantially free of nitrates relative to the influent, the effluent being drawn from a top of the tank. During the process, the wastewater in the tank is intermittently mixed to maintain the biomass in suspension within the tank and to assist in controlling the concentration of biomass in the tank.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: February 13, 1996
    Assignee: Lawrence A. Schmid
    Inventor: Lawrence A. Schmid
  • Patent number: 5489380
    Abstract: A process for the biological purification of sewage is specified, with which sewage (AW), containing dissolved pollutants, and air (LT) are fed together to a reactor (1) via at least two mutually separate nozzles (3,4). To achieve a high substance exchange in the reactor (1), the streams of the two-substance mixture emanating from the nozzles (3,4) are conducted such that they make impact with each other in the said reactor in an impact zone (PZ). The sewage (AW) is passed from the reactor (1) into Pa settling tank (8), in which bio sludge settles.
    Type: Grant
    Filed: February 14, 1994
    Date of Patent: February 6, 1996
    Assignee: Otto Oeko-Tech GmbH & Co., KG
    Inventor: Edward S. Gaddis
  • Patent number: 5484524
    Abstract: A wastewater treatment plant for removal of organic matter, suspended solids and other pollutants comprising a pre-treatment chamber, a biofilm-aeration chamber and a settling chamber. Biofilm grows on biofilm support structure which is stationary and submerged in the mixed liquor of the biofilm aeration chamber. The combination of submerged or surface aeration and suspended solids particle size reduction occurs thereby creating a sufficient fluid flow within the biofilm aeration chamber. This combination of sufficient fluid flow, and reduced size suspended organic particles results in the efficient digestion of organic matter and pollutants by the biofilm growing on the biofilm support structure submerged in the biofilm aeration chamber. This results in a vastly more effective digestive process than conventional processes producing no sludge. Further, resulting treated effluent has a high dissolved oxygen content and low BOD and SS.
    Type: Grant
    Filed: February 1, 1993
    Date of Patent: January 16, 1996
    Assignee: JET, Inc.
    Inventors: David S. MacLaren, Nianfa Tang
  • Patent number: 5482528
    Abstract: Solid waste such as sewage sludge containing fecal matter is processed to reduce pathogens by at least 90% and converted to a useful product such as an amendment to agricultural land by combining the waste with an acid such as concentrated sulfuric and a base such as fly ash which exothermically react and thermally pasteurize the waste and add mineral value to the product. Pozzolanic materials, such as fly ash agglomerate the product and after grinding, the particles can aerate soil. The calcium oxide in fly ash reacts with sulfuric acid to form calcium sulfate dihydrate, a soil amendment. The amount of sulfuric acid can be controlled to provide a product with acid pH which is useful to neutralize alkaline soils such as those found in the Western United States of America.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: January 9, 1996
    Assignee: Hondo Chemical, Inc.
    Inventors: Edwin C. Angell, Jess Karr
  • Patent number: 5480564
    Abstract: The present invention comprises an improved method and apparatus for treating water in heat exchange systems. The present invention automatically and inexpensively provides an effective chemical to process water systems at times and in proportion to the need for water treatment in such systems. When used in evaporative cooling systems, the present invention adds the treatment chemical to the system via the make-up water. The make-up water acquires a substantially constant concentration of treatment chemical as it is passed through a device containing a treatment chemical. The constant concentration of chemical is achieved by dividing the make-up flow into two streams within the device, saturating the smaller of the two streams with chemical, and re-mixing the two streams. The biocide agent used in the preferred embodiment of the invention is prilled elemental iodine.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: January 2, 1996
    Assignee: Baltimore Aircoil Company, Inc.
    Inventors: Daniel H. Pope, Dennis R. Honchar, Wilbur L. Medairy
  • Patent number: 5480538
    Abstract: A process and an apparatus for treating waste water in oxidations ponds, oxidation ditches, or other bodies of water in a waste water treatment facility to abate the malodors caused by the presence of volatile contaminants. In the process, a water stream is withdrawn from the body of waste water and contacted with an air stream in an air-water contact apparatus. The water stream is thereby aerated and stripped of potentially odor causing volatile contaminants and an off-gas stream is produced containing the stripped volatile contaminants. At least a portion of the aerated and stripped water stream is returned to the body of waste water to inhibit anaerobic decomposition of organic impurities.
    Type: Grant
    Filed: August 29, 1994
    Date of Patent: January 2, 1996
    Assignee: Monsanto Enviro-Chem Systems, Inc.
    Inventors: David E. McCombs, Colin D. Dougald, Martin L. Rapp
  • Patent number: 5480549
    Abstract: An apparatus and method for supplying a vapor-phase nutrient to contaminated soil for in situ bioremediation. The apparatus includes a housing adapted for containing a quantity of the liquid nutrient, a conduit in fluid communication with the interior of the housing, means for causing a gas to flow through the conduit, and means for contacting the gas with the liquid so that a portion thereof evaporates and mixes with the gas. The mixture of gas and nutrient vapor is delivered to the contaminated site via a system of injection and extraction wells configured to the site. The mixture has a partial pressure of vaporized nutrient that is no greater than the vapor pressure of the liquid. If desired, the nutrient and/or the gas may be heated to increase the vapor pressure and the nutrient concentration of the mixture. Preferably, the nutrient is a volatile, substantially nontoxic and nonflammable organic phosphate that is a liquid at environmental temperatures, such as triethyl phosphate or tributyl phosphate.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: January 2, 1996
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Brian B. Looney, Kenneth H. Lombard, Terry C. Hazen, Susan M. Pfiffner, Tommy J. Phelps, James W. Borthen
  • Patent number: 5480579
    Abstract: A method of creating an environment which promotes dehalogenation and/or degradation of halogenated organic chemical contaminants in water, sediment, or soil by adding a combination of fibrous organic matter and certain multi-valent metal particles to the water, sediment or soil.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: January 2, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Alan G. Seech, James E. Cairns, Igor J. Marvan
  • Patent number: 5480551
    Abstract: Process for the biological treatment of water using a biological reactor containing a culture of microorganisms, immobilized on a granular support material, according to which an expendable powdery material is injected into the said reactor, said process being performed so as to ensure a self-selection and a self-regulation of the support material of the particle size necessary for the biological process.
    Type: Grant
    Filed: June 22, 1994
    Date of Patent: January 2, 1996
    Assignee: Degremont
    Inventors: Pavel Chudoba, Michele Pannier
  • Patent number: 5478472
    Abstract: A method for treating waste water which contains organic and inorganic compounds, particularly waste water from the synthesis of epichlorohydrins, in which the waste water is subjected toa) thermal-alkaline treatment,b) biological treatment, andc) optionally to chemical-oxidative treatment.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: December 26, 1995
    Assignee: Solvay Deutschland GmbH
    Inventors: Wolfgang Dilla, Helmut Dillenburg, Hans-Georg Krebber, Erich Ploenissen
  • Patent number: 5478464
    Abstract: A method for the biodegradation of organic contaminants in a mass of particulate solids. The method comprises providing a contaminated mass of particulate solids on an impervious surface in fluid communication with an impervious recovery reservoir. The impervious surface has operating thereon air supply and/or air suction means to provide suitable and continuous oxygenation of the mass and/or to remove undesirable vapor emissions from the mass. The mass is periodically irrigated by applying on its surface a culture medium comprising at least one bacterial strain and co-substrates thereof. The bacterial strain has the ability to degrade the organic contaminants. The medium is drained through the mass and washings recovered in the reservoir to be reused to irrigate the mass.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: December 26, 1995
    Assignee: Biogenie Inc.
    Inventor: Benoit Cyr
  • Patent number: 5474682
    Abstract: The invention provides a method for removing sulphur compounds from water by anaerobic reduction of the sulphur compounds to sulphide, followed by a partial oxidation of the sulphide to elementary sulphur. The anaerobic reduction is carried out at elevated temperature, either continuously at a temperature of 45.degree.-70.degree. C., or periodically at a temperature of 55.degree.-100.degree. C. If the reduction is carried out periodically, a single rise in temperature for a few hours to several days over a period of 3-6 months can suffice. The method is particularly applicable to the removal of sulphate, sulphite and thiosulphate.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: December 12, 1995
    Assignee: Paques B.V.
    Inventor: Cees J. N. Buisman
  • Patent number: 5472610
    Abstract: A gas is blown into a filter (1) having a granular filter bed such that the gas flows into the bed along at least one elongate free edge disposed in the bed.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: December 5, 1995
    Assignee: Nordic Water Products AB
    Inventor: Kurt Jonsson
  • Patent number: 5466373
    Abstract: The invention is a method and intended apparatus for filtering water in aquaria, fish-rearing tanks, hatchery or other aquatic systems using amphipods, e.g. the Hyalella azteca, in the filtering matrix of the managed water system. In particular, the use of amphipods in the filtration system results in maintenance-free operation due to the action and self-sustaining nature of amphipods in these aquatic systems.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: November 14, 1995
    Assignee: University of Maryland Eastern Shore
    Inventors: Thomas S. Handwerker, Clement L. Counts, III
  • Patent number: 5462656
    Abstract: A method and apparatus for the biological purification of cutting oil, such as used in metal machining apparatus, is disclosed. The invention herein provides a suitable environment for cultured aerobic bacteria. These beneficial bacteria act to break down the hazardous organic waste products of anaerobic bacteria and eliminate rank odors. The cutting oil is aerated to encourage the proliferation of the aerobic bacteria, and to discourage the proliferation of the unwanted anaerobic bacteria.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: October 31, 1995
    Assignee: Harvey Universal, Inc.
    Inventor: Robert Staniec
  • Patent number: 5462657
    Abstract: New techniques and means for their utilization are described for substantially improving gas to liquid transfer including aeration of hydroelectric project tailwaters and treatment of sewage sludge and sewage treatment effluent or other wastewaters. Liquid flow is directed over an infuser device to separate the liquid into a plurality of free-falling curtains disposed to impinge upon a collection pool therebeneath wherein a substantial number of gas bubbles entrained by any particular curtain are acted upon by successive impingements of downstream curtains to effect turbulent interaction, shearing, and reentrainment of such bubbles and substantially increase the residence time thereof in the resulting recombined flow.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: October 31, 1995
    Assignee: Tennessee Valley Authority
    Inventors: Tony A. Rizk, Gary E. Hauser
  • Patent number: 5458779
    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 0.96 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: August 28, 1992
    Date of Patent: October 17, 1995
    Assignee: Kaldnes Miljoteknologi A/S
    Inventor: Hallvard Odegaard
  • Patent number: 5458778
    Abstract: A vehicle refueling station has a water treatment system for the vehicle washing installation which utilizes mechanical flotation and an aerobic treatment of the flotage to minimize sewer discharge. The gas from the anaerobic treatment is used to fuel a thermal electric converter which can also be fueled by vapors from the fueling operation. The thermal energy can be used to heat the water for car washing or for space heating purposes. The electrical energy can drive the electrical equipment at the refueling station.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: October 17, 1995
    Assignee: Partner GmbH
    Inventors: Otto Stuckmann, Detlev Sassin
  • Patent number: RE35074
    Abstract: A system for removing hazardous contaminants such as radon gas and volatile synthetic organic chemicals from domestic water supplies includes a perforated, horizontally-oriented tray which is baffled to define a curved (e.g., serpentine, spiral) liquid flow path. Contaminated water is distributed upon a portion of the tray and flows as directed by the baffles to a downcomer and into a storage tank. Air is blown into the storage tank, which is located below the perforated tray, and up through the perforations. The forced air causes the water flowing across the tray to froth, and evaporates the contaminants out of the frothing water. The forced air, carrying the volatilized contaminants, is then vented outside the home.
    Type: Grant
    Filed: February 9, 1993
    Date of Patent: October 31, 1995
    Assignee: North East Environmental Products, Inc.
    Inventor: Bruce L. Lamarre