And Additional Diverse Separation Patents (Class 210/804)
  • Patent number: 5382368
    Abstract: In the Invention is directed to a method and apparatus for dewatering sludge wastes discharged from a factory such as pulp factory. Sludge wastes are first dewatered by a preliminary dewatering device such as a pre-thickener of a rotary screen type, sludge discharged from the preliminary dewatering device is then supplied to a main dewatering device such as a screw press. Waste liquid discharged from the preliminary and main dewatering devices are supplied to an agglutinating reaction tank together with a macromolecular agglutinating reagent and agglutinated substances in the agglutinating reaction tank are treated by the main dewatering device. The agglutinated substances formed on the bottom surface of the agglutinating reaction tank can be treated by a second main dewatering device other than the main dewatering device. A necessary amount of the macromolecular agglutinating reagent supplied to the agglutinating reaction tank can be reduced without deteriorating the dewatering efficiency.
    Type: Grant
    Filed: May 20, 1993
    Date of Patent: January 17, 1995
    Assignee: Fukoku Kogyo Co., Ltd.
    Inventor: Hachiro Sato
  • Patent number: 5360556
    Abstract: An on-site wastewater treatment system distributes septic tank effluent over a particulate media filter bed through a distribution manifold at a sufficient volumetric flow rate relative to the cross-sectional area of the distribution conduits to inhibit undesirable biological growth in the conduits and in the filter by creating a scouring effect in the conduits. This effect prevents clogging of the conduits and maximizes the even distribution of effluent in the filter. A mesh fabric intercepts the downward flow of the effluent in the filter to further aid in the even distribution of effluent in the filter. Orifice shields also aid in such distribution by preventing clogging of orifices embedded in the filter media. A high pressure switch in the distribution manifold and a high water alarm in the filter pump basin indicate when required maintenance is necessary, and the switch controlling the high water alarm temporarily disables the septic tank pump as well.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: November 1, 1994
    Assignee: Orenco Systems, Inc.
    Inventors: Harold L. Ball, Terry R. Bounds, Eric S. Ball, Jeffrey L. Ball
  • Patent number: 5352363
    Abstract: Disclosed herein is a process for the removal of an oil in an aqueous liquid wherein after cleaning a workpiece having oil thereon with an aqueous solution of a detergent, the oil contained in the aqueous solution is removed from the aqueous solution. The oil-containing aqueous solution is heated to a predetermined temperature, at which the detergent component does not evaporate, to unite droplets of the oil with each other, thereby making the size of the oil droplets greater, and the oil droplets which have grown greater in size are then separated and removed from the aqueous solution. According to this process, an oil emulsified in the aqueous detergent solution can be separated and removed from the aqueous solution with ease to keep the detergency of the detergent over a long period of time.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: October 4, 1994
    Inventor: Yoshihide Shibano
  • Patent number: 5350527
    Abstract: A system and a process for separating impurities such as grease, fuels and solid particulate matter, from water contaminated therewith, comprising passing the water to be treated through a first cleanable strainer bag assembly for filtering solids, a holding/settling tank for separation of an oily and water phase and for precipitation of solids, a second cleanable strainer bag assembly having at least one strainer bag of a porosity finer than the porosity of the strainer bag of said first cleanable strainer bag assembly, a heavy oil gravity separator, a light oil coalescer, a further oil and petrochemical and very fine solid separator with a replaceable polypropylene element for adsorbing or absorbing oil and filtering solids, and preferably also a carbon filter assembly. The invention makes possible the economical removal of impurities and the reclaiming of water with a residual impurities level of less than 5 parts per million.
    Type: Grant
    Filed: September 14, 1993
    Date of Patent: September 27, 1994
    Inventor: John C. Kitko
  • Patent number: 5344570
    Abstract: A method for removing insoluble materials from a liquid mixture, including spinning at least one centrifuge separator at a predetermined speed and pumping the mixture to the spinning centrifuge separator at a predetermined rate. The rate in which the mixture is pumped to the separator is varied in response to a variable angular moment of force in the centrifuge separator caused by density variations in the mixture. The method is carried out by an apparatus including at least one centrifuge separator coupled in fluid communication to at least one pump. A closed-loop feedback system is operably coupled to the devices driving both the separator and the pump to control the rate in which the mixture is supplied to the separator. The rate is determined by the angular moment of force in the separator which then allows the system to increase, maintain, or decrease the output of the pump.
    Type: Grant
    Filed: January 14, 1993
    Date of Patent: September 6, 1994
    Assignee: James E. McLachlan
    Inventors: James E. McLachlan, Michael G. Domagalski, Bruce I. Gilman
  • Patent number: 5306425
    Abstract: A mechanism for wastewater treatment which includes a plurality of solids settling chambers, at least a primary, secondary and a tertiary filter for selectively filtering waste water and effecting settling of solids of different sizes in the settling chambers and flow equalization ports for effecting demand flow of wastewater through the mechanism and the eventual discharge of high quality effluent. Chlorination and optionally dechlorination are effected as integral process functions of the wastewater treatment mechanism.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: April 26, 1994
    Assignee: Norwalk Wastewater Equipment Company
    Inventor: Jan D. Graves
  • Patent number: 5298167
    Abstract: An apparatus and a method are disclosed for separating a first fluid from a second fluid wherein the first fluid is lighter than the second fluid and the first fluid is immiscible with the second fluid. A first portion of the first fluid is separated from a mixture containing the first and second fluids in a gravity separator. The remaining mixture flows to a hydrocyclone where a second portion of the first fluid is separated from the remaining mixture. The underflow from the hydrocyclone which includes most of the second fluid and the remaining portion of the first fluid flows to a second gravity separator without substantial pressure reduction to avoid shearing of the droplets of the first fluid. In the second gravity separator a third portion of the first fluid is removed.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: March 29, 1994
    Inventor: Kenneth E. Arnold
  • Patent number: 5296150
    Abstract: An apparatus for separating at least one selected medium from a liquid influent stream includes an assembly for dividing the influent stream into a plurality of smaller streams at an interface and means for filtering the smaller streams as they each flow along a discrete flow path substantially distinct from the flow paths of the other smaller streams. The apparatus is particularly suited for removing oils, greases, and suspended solids from a water oil mixture and is of a compact overall shape to permit mobile on-site use of the separator, for example, to remove contaminants from an aqueous mixture drawn out from a contaminated water table. The assembly for dividing the influent stream into smaller streams may include a diffuser plate having a plurality of apertures and the filtering assembly may include a head of oil disposed adjacent the diffuser plate for acting on the smaller streams created by the flow of the influent through the apertures of the diffuser plate.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: March 22, 1994
    Assignee: Environmental Pretreatment Systems, Inc.
    Inventor: Bennett W. Taylor, Jr.
  • Patent number: 5266208
    Abstract: A process and system are provided for treating wastewater having at least a hydrocarbon component and water in which a multi-phase liquid system including an aqueous hydrocarbon-contaminated layer is formed and isolated from a remaining hydrocarbon-enriched layer. The aqueous hydrocarbon-contaminated layer is treated to remove volatile hydrocarbon contaminant, insoluble organic contaminant and dissolved hydrocarbon contaminant.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: November 30, 1993
    Assignee: Braun Intertec Environmental, Inc.
    Inventors: Shawn M. Stahly, See C. Chan, Clay A. Ellison
  • Patent number: 5256299
    Abstract: An improved method and apparatus for purifying liquid in a square or rectangular tank involving ultra violet (UV) treatment, oxidation, flotation, filtration, effluent purging and disinfection is described. The liquid to be treated is fed into the mixing chamber of the apparatus in the presence of UV light and an oxident (ozone and/or hydrogen peroxide), and then discharged into the flotation chamber for gas stripping of volatile organic compounds (VOC) and flotation removal of floating substances. The subnatant in flotation chamber flows downward through multiple automatic backwash liquid phase granular activated carbon (GAC) filters for final polishing before being discharged as the liquid effluent or further disinfected. The flotation chamber is hooded for collection of gas stream which is moved by a gas mover and purified by a gas phase granular activated carbon (GAC) filter.
    Type: Grant
    Filed: July 2, 1990
    Date of Patent: October 26, 1993
    Assignee: International Environmental Systems, Inc., USA
    Inventors: Lawrence K. Wang, Lubomyr Kurylko
  • Patent number: 5244575
    Abstract: A method for recovering contaminants and the organic solvents used to extract the contaminants from an aqueous solution containing soap liquors comprises extracting the aqueous solution with an organic solvent having a density sufficient to extract the contaminants and to subsequently separate the organic solvent from the aqueous solution containing the soap liquors. The method further comprises shaking the aqueous solution for providing intimate contact between the organic solvent and the aqueous solution, adding an inorganic salt after shaking the aqueous solution for separating the aqueous solution into a plurality of layers, reextracting at least one layer with an organic solvent for producing a second plurality of layers, and separating a layer substantially including the organic solvent and the contaminants for recovering the organic solvent and the contaminants from the aqueous solution containing the soap liquors.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: September 14, 1993
    Assignee: Westinghouse Electric Corp.
    Inventor: Gary R. Marshall
  • Patent number: 5238578
    Abstract: An apparatus and method for processing an influent liquid including at least a solvent and non-volatile impurities by combining the liquid with a vapor to produce a precipitated sludge is disclosed. The influent liquid is introduced into a wet well. A saturated, water containing reflux and a precipitated sludge are transferred to the well from a reactor. The saturated, water containing reflux precipitated sludge and influent liquid are mixed to form a mixture of saturated, water containing reflux and precipitated sludge. The saturated, water containing reflux is then transferred to the reactor and contacted with a vapor to form the precipitated sludge. The vapor is then discharged from the reactor, and the precipitated sludge is discharged from the wet well.
    Type: Grant
    Filed: April 17, 1992
    Date of Patent: August 24, 1993
    Inventor: Andrew A. Rathsack
  • Patent number: 5227071
    Abstract: A five stage treatment system for treating oily wastewater to fit it for discharge to surface waters comprising a coalescer for separating free oil, an ultrafiltration unit for separating emulsified oil, an activated carbon filter for separating residual light organic compounds, a cation exchanger for removing heavy metal ions, a pH adjusting unit for adjusting the treated water to substantially neutral pH prior to discharge, and a controller for regulating the operation of the system. An optional gravity separation stage and/or a clarifier stage may also be included, if desired. Flow of permeate from the ultrafiltration stage is monitored and control valves admitting feed solution to the ultrafiltration unit or discharging retentate from the ultrafiltration unit are adjusted in response to the measured values to maintain a desired rate of permeate flow.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: July 13, 1993
    Assignee: Madison Chemical Company, Inc.
    Inventors: William N. Torline, Richard K. Williams
  • Patent number: 5223148
    Abstract: A process and an apparatus are described for separation of water and solids from oil sands froth in which heated froth is fed into a gravity settling vessel at a level below a bitumen-water interface established between a bitumen froth layer floating on a quiescent body of water whereby water and solids contained in the froth separate from the froth stream, the oil rises to accumulate in the bitumen froth layer, and the solids fall by gravity to the bottom of the gravity settling vessel. The apparatus comprises an injector manifold suspended horizontally within the vessel below the bitumen-water interface, said injector manifold having a plurality of equispaced, inwardly facing openings for the inward discharge of oil sands froth into the body of water. The injector ring manifold may also have a plurality of outwardly facing openings for both inward and outward discharge of froth.
    Type: Grant
    Filed: November 12, 1991
    Date of Patent: June 29, 1993
    Assignee: Oslo Alberta Limited
    Inventors: Robert N. Tipman, Varagur S. V. Rajan, Dean Wallace
  • Patent number: 5223147
    Abstract: Contaminated soils are treated in that an aqueous slurry of the soil is separated into a coarse fraction and a fine fraction, the fine fraction is subjected to flotation, the resulting froth is dewatered and then carried away as a pollutant concentrate, and the underflow from the flotation is dewatered and is then carried away as purified soil. An emulsified oily vegetable oil is used as a collector agent for the selective flotation or an emulsified light mineral oil is used as a collector agent for the selective flotation and a light mineral oil is stirred as a conditioning agent into the fine fraction before it is subjected to the selective flotation.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: June 29, 1993
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Friedrich Rosenstock, Jochen Guntner, Elmar Haite, Horst Dittmann
  • Patent number: 5207922
    Abstract: A method is designed to treat the effluent from a commercial laundry facility. Commercial laundry facilities produce typically a relatively clean effluent produced by washing clothing, towels and the like. The same laundry facility can also produce an oily effluent from washing shop towels, mops and the like. The effluent produced by the commercial laundry is all subjected to a particulate filtration and heat exchanger. The nonoily effluent is then directed to the sanitary drain. The oily effluent is treated with a demulsifier to break down the oil/water emulsion and is subsequently transferred to a oil/water separator. This permits the capacity of the oil/water separator to be approximately 1/3 to 1/4 of that which would be required to treat all effluent in the laundry.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: May 4, 1993
    Assignee: Diversey Corporation
    Inventors: James P. McFarlan, William H. Frisz
  • Patent number: 5207921
    Abstract: A process and system for continuously recovering industrial waste water characterized as divergent hydro-lipophilic waste streams for industrial reuses to enhance water conservation and to reduce environmental pollution is disclosed. The process and system are especially suited for reclaiming animal and food processing discharge water having blood, fat, oil and grease contaminants in the water, for industrial reuse in evaporative condensers, hydraulic system cooling and equipment, non-food contact vehicles and plant or factory area wash-downs. The process can operate continuously for supplying water for such industrial uses, but also includes an automatic shut down if the incoming influent to be treated is too turbid. The process includes chemical pH adjustment, separation of fat, oil and grease (FOG) from the influent and particulate removal in polishing filters. Sensors are used to monitor the pH and component internal water pressures throughout.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: May 4, 1993
    Inventor: John D. Vincent
  • Patent number: 5203969
    Abstract: A method of separating and recovering components of a mixture having a gap in the range of miscibility and having organic compounds and water in a pervaporization process with the aid of membranes. The mixture is first separated into an organically loaded water phase and a water-saturated organic phase. Subsequently, the organically loaded water phase and the water-saturated organic phase are separately subjected to parallel, different pervaporization processes, resulting in retentates as water on the one hand and organic liquid on the other hand. The permeates that result during the pervaporization processes are subsequently returned to the mixture that is to be separated.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: April 20, 1993
    Assignee: GKSS-Forschungszentrum Geesthacht GmbH
    Inventors: Axel Wenzlaff, Dieter Behling, Karl W. Boddeker
  • Patent number: 5202031
    Abstract: Improved techniques are provided for separating mixtures of materials having different densities. The apparatus of the present invention is well suited for separating oil from water, and includes a separation tank defining a cylindrical water storage chamber and a frustroconical separation chamber spaced above an adjoining the water storage chamber. Fluid is input to the separation tank at the level of the oil/water interface. An oil leg is spaced above the separation chamber, and an adjustable oil overflow unit is provided adjacent the oil outlet for selectively varying the head pressure of oil in the oil leg. A water leg is provided in parallel with the separation tank, and an adjustable water overflow unit is provided adjacent the water outlet for selectively varying the head pressure of water in the water leg. The adjustable overflow units allow the head pressure in the oil leg relative to the head pressure in the water leg to maintain the interface within the upper portion of the separation chamber.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: April 13, 1993
    Inventor: Theodore R. Rymal, Jr.
  • Patent number: 5196123
    Abstract: Separation of oil from an aqueous condensate is effected by feeding the condensate into the headspace of a liquid pool containig separation tank so that a layer of oil will settle on top of water in the pool. An oil-receiver tank above the separation tank and connected thereto by a vertical pipe, also has a liquid pool therein above which a head space at sub-atmospheric pressure exists. Oil in the layer is accessed with a lower entry to the vertical pipe submerged below the separation tank liquid level and ascends into the pipe and upwardly to the oil-receiver tank, the oil ascent being accompanied by descent of water from the liquid pool in the oil-receiver tank. When the oil-receiver tank and an upper section of the vertical pipe are filled with oil only, the oil-containing tank can be drained. Separation operation can resume following reestablishment of the liquid pool in the oil-receiver by inletting a quantity of clean water thereto.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: March 23, 1993
    Assignee: Scales Air Compressor Corporation
    Inventor: Robert W. Guthy
  • Patent number: 5178773
    Abstract: A high efficiency filter medium is placed in series with a water treatment clarification system for receiving the treated effluent discharged from the clarifier. The treated water is passed through the high-efficiency filter media for reducing the suspended solid constituent of the water to less than 10 ppm. The filter is supported in a open mesh carrier tray and is made of a polyester material adapted for collecting and entrapping the solid suspended particles in the clarified water discharge.
    Type: Grant
    Filed: October 31, 1991
    Date of Patent: January 12, 1993
    Assignee: Briggs & Stratton Corporation
    Inventors: Daniel E. Kerlin, Thomas G. Drews, George F. Rische
  • Patent number: 5178755
    Abstract: Ozonated liquid is mixed within a multi-stage clarifier system with wastewater to be treated and suspended solids are removed. The clarified effluent is filtered and exposed to ultraviolet radiation. Ozone is injected into the irradiated effluent and received within a contact tower where reaction between the contaminants and ozone takes place. The ultraviolet irradiated, ozonated, and clarified liquid is recirculated through an ozone injector and discharged through a mixer plate into a purge chamber. The purge chamber effluent is split, with a portion returning to the contact tower and passing through a second ultraviolet radiation source, and the remaining purge chamber effluent being distributed within the clarifiers. After a predetermined residence within the system, a diverter valve in the return line is operable to discharge the treated water through a carbon filter and out of the system.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: January 12, 1993
    Assignee: ESTR Inc.
    Inventor: Gaylen R. LaCrosse
  • Patent number: 5174898
    Abstract: A paint sludge is subjected to aerobic biodegradation with increased dry content of the resulting sludge and the latter is then subjected to anaerobic biological degradation. The effluent from the two biostages are sterilized by ozonization, UV-irradiation or peroxide addition. The sludge from the anaerobic biostage can be dried to an inert granulate and drying vapors are recycled to the aerobic biostage. The sterile liquid is returned to the wash water circulation of the painting plant.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: December 29, 1992
    Assignee: Parkner GmbH
    Inventors: Otto Stuckmann, Peter Hombach, Wolfgang Ruger, Karl Grosse, Wolfgang Leiner, Winfried Schmidt, Reinhard Diekmann
  • Patent number: 5171455
    Abstract: Small quantities of one or more liquids having a low boiling point dispersed with a large quantity of one or more immiscible liquids having a higher boiling point are separated in a rapid and efficient manner. A non-reactive gas (nitrogen, helium, air, or combinations thereof) is heated by recycled energy and make-up energy to a temperature above the boiling point of at least one liquid but below that of at least one other liquid. The heated gas is combined with the unheated or preheated liquid-liquid mixture to be separated, and the liquid-gas blend is mixed, heated and distributed by an improved heat exchanger having thermal conductive gas tubing, metal wools and fins) and nebulizer, forming a mist inside a vessel containing a pool liquid of at least one liquid having a boiling point higher than that of at least one other liquid, which pool liquid has been heated with at least a heat pump means to a temperature above the boiling point of at least one liquid but below the pool liquid's own boiling point.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: December 15, 1992
    Assignee: International Environmental Systems, Inc.
    Inventors: Lawrence K. Wang, Roland E. Weber, John J. Pavlovich
  • Patent number: 5167829
    Abstract: In accordance with the present invention, there is provided a system for treating commercial, industrial and institutional effluents to remove contaminants such as: fats, oils and greases, (FOGs) from the waste water. The system generally features a continuous processing treatment of the effluent, but can also be adapted on a small scale to a batch procedure. The system comprises the feeding of an emulsified waste stream to a first screening station, where solid matter and large particulates are removed. The FOGs in the waste stream are initially emulsified during the laundering or cleaning process by an alkaline detergent. The alkaline, emulsified waste stream is then fed to a first stage of a pH adjustment station. Here, the emulsified FOGs begin the process of being released and dispersed within the fluid, through the downward adjustment of the pH, i.e. by treating the effluent with acid.
    Type: Grant
    Filed: June 21, 1991
    Date of Patent: December 1, 1992
    Inventors: Harold Diamond, Thaddeus J. Kaniecki, Larry Rotter, Rudolph N. Vermes
  • 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: 5167821
    Abstract: A method for efficiently thickening and dewatering a slurry sludge in a short period of time without the necessity of a vast site, which comprises the steps of: stirring a slurry sludge added with a coagulant in a stirring tank to convert the slurry sludge into a floc; supplying the floc and a superantant liquid, which are produced in the stirring tank, onto an inlet side of an inclined endless travelling filter cloth of an endless travelling filter cloth type dewatering unit, which comprises a dewatering tank and the above-mentioned inclined endless travelling filter cloth arranged in the dewatering tank; continuously travelling the thus supplied floc, on the endless travelling filter cloth, toward an exit side thereof; thickening the floc on a portion of the endless travelling filter cloth, which portion is located in the supernatant liquid in the dewatering tank, and dewatering the thus thickened floc on a portion of the endless travelling filter cloth, which portion is located above the surface of the sup
    Type: Grant
    Filed: January 29, 1991
    Date of Patent: December 1, 1992
    Assignees: Norihito Tambo, NKK Corporation
    Inventors: Norihito Tanbo, Hiromu Fukano, Yasuhiko Kihara
  • Patent number: 5160636
    Abstract: A process is presented for treating and detoxifying mixed wastes, especially those containing volatile chemically oxidizable organics, nonvolatile inorganics and radioactive pollutants. The process combines an efficient extraction system, a filtration step, and evaporation system to concentrate the pollutants originally present in the mixed waste and a catalytic oxidation reaction to convert the volatilized organic and inorganic pollutants. A condensate product is obtained that is recycled internally to provide a closed system that discharges only inert gases and treated solid products.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: November 3, 1992
    Assignee: Chemical Waste Management, Inc.
    Inventors: Greg Gilles, Matt Husain
  • Patent number: 5154831
    Abstract: The present invention is directed to a process for treating an oily substrate, including a mixture comprising water and oily material or a mixture comprising water, solids and oily material as components, and wherein such treatment comprises contacting the oily substrate with a solvent for the oily material, and wherein the solvent for the oily material ranges in solubility in water from sparingly soluble to substantially water insoluble, in the presence of an added comminuting and dispersing surfactant, to produce by such contacting at least one phase differentiating interface, and to thereby render one or more of the components of the oily substrate separable.
    Type: Grant
    Filed: October 2, 1990
    Date of Patent: October 13, 1992
    Assignee: ENSR Corporation
    Inventors: Saeed T. Darian, Stephen P. Weinberg
  • Patent number: 5141651
    Abstract: A continuous flow FFF process for the separation of samples of particles which uses a modified channel structure to reduce the relaxation effect, reduce sample adhesion to the wall, and where possible eliminate the stop-flow procedure and thus greatly increase the speed and stability of operation, said modified channel comprises a thin channel whose thickness is reduced at the inlet end for a substantial distance beyond the inlet, such as the conventional triangular or near triangular piece, and then broadened out at the outlet end of the channel.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: August 25, 1992
    Assignee: University of Utah
    Inventor: John C. Giddings
  • Patent number: 5132025
    Abstract: A method of recycling or destroying the components of viscous oil well drilling mud and saltwater which includes reducing the mud to an aqueous slurry; separating and collecting the useable hydrocarbons from the slurry by evaporation or chemical action; injecting deleterious substances including saltwater into an environmentally approved injection well; and or forming fertilizer pellets from remaining dehydrated solids.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: July 21, 1992
    Inventor: Ricky A. Hays
  • Patent number: 5110482
    Abstract: A method of repurifying water from a public supply, comprising the steps of:taking water to be repurified continuously from the public supply;filtering the water slowly through a volume of particulate material; andaccumulating the filtered water to provide a store of repurified water for later use as and when required.According to a second aspect of the present invention, there is provided an apparatus for repurifying water from a public supply, comprising:a water inlet adapted for connection to the public supply and operable to take a continuous flow of water from the supply;a filter comprising a volume of particulate filter material and arranged to receive the water from the water inlet;a container arranged to receive filtered water therefrom and to store the filtered water;and a water outlet connected to the container and operable to draw off filtered water as and when required.
    Type: Grant
    Filed: April 10, 1990
    Date of Patent: May 5, 1992
    Assignee: Goldstar, Co., Ltd.
    Inventor: Kyong S. Shin
  • Patent number: 5102554
    Abstract: In a method of recovering phosphor for picture tubes from phosphor sludge, the phosphor sludge is first subjected to a steam treatment, thereby causing substances adhering to the surface of the phosphor particles to pass into solution. The phosphor is then washed several times. Following wet screening, one then obtains a phosphor suspension that can be further processed just like virgin phosphor. The said method does not comprise any drying or calcining processes. The steam treatment causes the phosphor particles in the phosphor sludge to lose their tendency to cluster and form lumps, so that one obtains a high-yield suspension of very fine phosphor particles that can be further processed without any additional grinding or homogenization steps.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: April 7, 1992
    Assignee: Nokia Unterhaltungselektronik
    Inventor: Peter Groner
  • Patent number: 5093006
    Abstract: Liquid separator and method of separating oil and water components of a liquid mixture wherein the oil component is made up of droplets of a less dense phase in a more dense water phase, using a hydrocyclone for separating the components. A less dense component of the mixture separated by the hydrocyclone is passed from the underflow of the hydrocyclone to a filter device for further separation. A residence vessel may be provided upstream of the hydrocyclone for coalescing the mixture prior to passage into the hydrocyclone.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: March 3, 1992
    Assignee: Conoco Specialty Products Inc.
    Inventor: Charles M. Kalnins
  • Patent number: 5080806
    Abstract: A decontamination treatment of process water is disclosed herein originating from electroplating/metal finishing and etching operations wherein the process water is loaded with heavy metal ions. The process combines predetermined quantities of alkali/acid solutions together with a quantity of Sodium Humate so as to produce a disposable sludge which is environmentally safe and poses the least risk for leeching of harmful metals from the resultant sludge. Decontaminated waste water solution is also produced via a sand filter which is further processed to remove ionic, atomic or molecular metal suspended in the waste water solution. This latter process includes a microcon filter having electronic pressure sensors and feedback controls for returning contaminated waste water back into the system via automatic back wash. An electromagnetic ionic filter removes additional ionic, atomic or the like metal contaminants.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: January 14, 1992
    Inventor: Alfiero Balzano
  • Patent number: 5078899
    Abstract: In accordance with the invention, a method of treating mine water to remove ferric hydroxide comprises:combining acidic mine water with a predetermined amount of a fatty oil to produce a mixture;agitating the mixture for a first predetermined period of time to agglomerate solid ferric hydroxide and oil;allowing the agitated mixture to settle within a vessel for a second predetermined period of time to cause agglomerated ferric hydroxide and oil to rise to an upper level of the agitated mixture to provide a settled mixture of agglomerated hydroxide and oil floating atop remaining liquid therebelow; andseparating the agglomerated ferric hydroxide and oil at the upper level of the settled mixture from the remaining liquid.The process can also be conducted under such conditions that most all of the zinc follows the ferric hydroxide into the agglomerate phase.
    Type: Grant
    Filed: May 1, 1990
    Date of Patent: January 7, 1992
    Assignee: Idaho Research Foundation, Inc.
    Inventor: Larry Garrison
  • Patent number: 5076936
    Abstract: Removing radioactive contaminants from liquid hazardous material such as oil, includes recirculating the material between a processing tank and a filter medium. The material is heated to increase viscosity during the circulation through the tank and filters. Chemicals including chelating agents are added to enhance the removal of the radioactive elements. Water is added to the processing tank or upstream, in a settling tank, to effect a water wash of the liquid hazardous material. A pre-filter stage upstream of the settling tank is followed by a mid-range filter stage in the recirculation loop with the main processing tank. A finishing filter stage is in the outlet from the main processing tank.
    Type: Grant
    Filed: February 21, 1990
    Date of Patent: December 31, 1991
    Assignee: Southern California Edison Co.
    Inventor: Brian D. Metz
  • Patent number: 5066407
    Abstract: Machinery and method for the removal, separation, and recovery of petrochemical oils from the surface of bodies of water. The machinery comprises a pickup unit, a first separator unit, a second separator unit, and a third separator unit. The pickup or skimmer unit is designed to operate independently of or in combination with the separator units, and is capable of being propelled by a powered vessel or of being anchored to receive the separated and recovered oil by channelling booms.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: November 19, 1991
    Inventor: George R. Furlow
  • Patent number: 5053145
    Abstract: A dual direction transfer system for removing oil from an oily water source includes an oil separator mounted on a separator tank located so that its liquid level is above the liquid level of the oily water source, a dual direction transfer pipe through which flows the oily water and substantially oil free water in opposite directions, and a pump to force oily water from the source to the separator tank through the dual direction transfer pipe.
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: October 1, 1991
    Inventor: Billy L. Ellison
  • Patent number: 5039426
    Abstract: A process for continuous particle and polymer separation comprising injecting a stream of carrier fluid containing the material to be separated into the inlet end of a thin channel, adjusting the flow rate to a sufficiently high level that flow-dependent lift forces the different components to different transverse positions by the time they reach the end of the channel, splitting the outlet flow into at least two substreams by means of physical splitters, adjusting the flowrates of the multiple substreams such that the transverse position of the outlet splitting plane divides the particles into enriched fractions, collecting the enriched or separated components from the emerging outlet streams.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: August 13, 1991
    Assignee: University of Utah
    Inventor: John C. Giddings
  • Patent number: 5030357
    Abstract: An apparatus and method for separating hydrophobic materials in liquid state from an aqueous liquid or hydrophilic liquid, for separating debris from such liquid, or for purifying hydrophobic materials in liquid state are disclosed. An improved strainer for such apparatus and method is also disclosed. The apparatus and method employ at least one rotatable disk to which hydrophobic materials are attracted and retained; scraper blades to scrape the hydrophobic materials from the disk into a discharge tube from which said materials flow to a pump situated in the apparatus. The pump pumps the materials out of the apparatus. The pump is preferably driven by the same motor which rotates the disk. The strainer has an upper mesh portion and a lower portion where the walls and bottom are solid. The strainer also has an internal diverter plate. Influent containing debris strikes the plate and debris settles in the strainer and is retained in the non-mesh portion thereof.
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: July 9, 1991
    Assignee: Lowe Engineering Company
    Inventor: John G. Lowe
  • Patent number: 5028336
    Abstract: Water-soluble organic electrolytes, such as anions of lower carboxylic acids in aqueous solution at low pH, are removed by raising the pH and subjecting the resultant charge liquid to nanofiltration.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: July 2, 1991
    Assignee: Texaco Inc.
    Inventors: Craig R. Bartels, John Reale, Jr.
  • Patent number: 5009787
    Abstract: A system for removing dissolved and undissolved oil from contaminated water which recycles and reclaims absorbing fluid. An absorbing fluid (CCl.sub.2 FCClF.sub.2) is used in a wet-spiral mixer-absorber-contactor to absorb oil contaminants in produced-water. A downflow spreader system in a processing separator separates the heavier oil absorbing fluid from the oil-decontaminated water. Unspent absorbing fluid is recycled to the absorber-contactor and the decontaminated water is released into the surrounding environment. Spent absorbing fluid is reclaimed in a distillation treatment unit where the oil is used as fuel oil or stored. The absorbing fluid's vapors are drawn off under vacuum from the distillation unit by a jet eductor pump, mixed and condensed with the decontaminated water which drives the jet pump, and then redirected into the system for reuse.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: April 23, 1991
    Inventor: Paul C. Broussard, Sr.
  • Patent number: 4976862
    Abstract: A process for removing blowing agent from polymeric foam. The process comprises breaking up the foam in a liquid medium to obtain a solid phase of polymeric fragments and a liquid phase of blowing agent and liquid medium. The polymeric particles are then separated from said liquid phase.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: December 11, 1990
    Assignee: Dupont Canada Inc.
    Inventors: Michael R. Ascough, James A. Bueley
  • Patent number: 4946600
    Abstract: A method of repurifying water from a public supply, comprising the steps of:taking water to be repurified continuously from the public supply;filtering the water slowly through a volume of particulate material; andaccumulating the filtered water to provide a store of repurified water for later use as and when required.According to a second aspect of the present invention, there is provided an apparatus for repurifying water from a public supply, comprising:a water inlet adapted for connection to the public supply and operable to take a continuous flow of water from the supply;a filer comprising a volume of particulate filter material and arranged to receive the water from the water inlet;a container arranged to receive filtered water therefrom and to store the filtered water;and a water outlet connected to the container and operable to draw off filtered water as and when required.
    Type: Grant
    Filed: August 31, 1988
    Date of Patent: August 7, 1990
    Assignee: Goldstar Co., Ltd.
    Inventor: Kyong S. Shin
  • Patent number: 4944886
    Abstract: A method of sewage treatment is disclosed which consists of the following described steps: Firstly, directing the sewage to be treated into a holding tank; secondly, subjecting the sewage in the holding tank to ultrasonic vibrations in a range between 15 and 150 kilohertz for a period in excess of 12 seconds thereby achieving cavitation of the sewage; thirdly, draining the liquids from the sewage; and fourthly, removing the sewage residue remaining after drainage of liquids.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: July 31, 1990
    Inventor: Saad A. Masri
  • Patent number: 4931193
    Abstract: The invention relates to processes and apparatus for the elutriation of particles of a Ziegler-Natta type alpha-olefin polymerization catalyst, based on transition metal compound(s) and preferably also comprising magnesium compounds, by means of an elutriation liquid which is a non-polar liquid, for example a hydrocarbon chemically inert in relation to the catalyst. A preferred process comprises the following stages:preparation of a homogeneous suspension of the catalyst in the elutriation liquid, andelutriation of the catalyst by means of the suspension and the elutriation liquid in one or two elutriation columns (F1),(F2), separating the large and fine catalyst particles respectively.The apparatus comprises a tank (M2) for the preparation of the catalyst suspension and the elutriation column or columns (F1),(F2).
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: June 5, 1990
    Assignee: BP Chemicals Limited
    Inventor: Pierre Crouzet
  • Patent number: 4931183
    Abstract: In a process and apparatus for the biological purification of water by means of a closed percolating filter operated with pure oxygen and/or air, and an upward-flow filter disposed downstream of the percolating filter, with flotation filter material therein, saturation of the gas cushion predominantly containing oxygen in the percolating filter is controlled by selection of the operating pressure in such a fashion that the oxygen supply corresponds to the biochemical oxygen demand of the water on the one hand, while on the other hand a residual oxygen content dissolved in the water permits continuation with a biological fine purification operation in the upward-flow filter. The apparatus comprises a first chamber with the percolating filter, the water flowing downwardly therethrough, and a second chamber with filter material through which the water flows upwardly.
    Type: Grant
    Filed: June 24, 1988
    Date of Patent: June 5, 1990
    Inventors: Hans-Ulrich Klein, Klaus Kratzenstein
  • Patent number: 4917807
    Abstract: A method for cleaning a solvent which may conatin hazardous particulate material which comprises liquid and vapor portions which are being recirculated in a closed system. Suspended particulate material is filtered out of the liquid. Dissolved particulate material is removed by distilling the liquid. The vapor is condensed and combined with the clean liquid. A portion of the vapor is recirculated. The solvent may be cleaned and recirculated continuously.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: April 17, 1990
    Assignee: Westinghouse Electric Corp.
    Inventors: Anthony J. Prisco, Jr., Bruce R. Sewter, William E. Briggs, Gary L. Archer
  • Patent number: 4909947
    Abstract: A process for detoxifying a high aqueous content hazardous waste stream having a water content greater than about 70 weight percent and comprising halogenated hydrocarbonaceous compounds which comprises the steps of: (a) contacting the hazardous waste stream containing halogenated hydrocarbonaceous compounds in the presence of hydrogen and in the absence of a basic compound with a hydrogenation catalyst comprising a refractory support and at least one metal having hydrogenation activity and which metal is selected from the metals of Groups VI-B and VIII of the Periodic Table in a hydrotreating reaction zone operated at conditions selected to hydrogenate at least a portion of the halogenated hydrocarbonaceous compounds which conditions include a pressure from about 100 psig (2068 kPa gauge) to about 5000 psig (34475 kPa gauge), a maximum catalyst temperature from about 250.degree. F. (121.degree. C.) to about 850.degree. F. (454.degree. C.) and a hydrogen circulation rate from about 200 SCFB (35.6 std. m.sup.
    Type: Grant
    Filed: February 16, 1988
    Date of Patent: March 20, 1990
    Assignee: UOP
    Inventors: Russell W. Johnson, Karl J. Youtsey, David G. Hughes