And Additional Diverse Separation Patents (Class 210/804)
  • Patent number: 6682654
    Abstract: A paint spray booth sludge recovery system, apparatus and method is provided for water washed paint spray booths. The spray booths are used with a tank or pit which can accommodate flotation for removal of spent paint. Preferably, the tank has a drop box section, a chemical treatment section, a weir box section and a booth recirculation pump section. A series of weirs are used to separate the spent paint and send a concentration thereof from the weir box to a separator or centrifuge. The water level in the system is controlled by sensing the weir box water level to keep the water crests over the weirs at the desired levels. Scavenging and agitation are provided in the tank to keep it entirely clean for prolonged periods without any accumulation, even during downtime.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: January 27, 2004
    Inventor: Steve E. Telchuk
  • Patent number: 6630072
    Abstract: Novel methods and apparatuses are disclosed for the treatment of wastewater to reduce often associated offensive odors by promoting aerobic conditions through decreasing the amount of oxygen required to maintain aerobic cultures and/or aerobic biological activity in the wastewater.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: October 7, 2003
    Assignee: Hoffland Environmental, Inc.
    Inventor: Robert O. Hoffland
  • Publication number: 20030178372
    Abstract: Processes and apparatus are presented which allow efficient use of solid/liquid and liquid/liquid stages with chemical additives in separations technology.
    Type: Application
    Filed: December 18, 2002
    Publication date: September 25, 2003
    Inventors: Charlotte R. Droughton, Wenping Li
  • Publication number: 20030173306
    Abstract: A waste stream from energetics processing is treated using a pre-filter having media, preferably sand, and a metal that has a reducing potential, preferably elemental iron (Fe0). The pre-filter is connected to a zero-valent metal column reactor. The waste stream is pumped through the pre-filter to trap solids and deoxygenate it, then enters the reactor and is subjected to a reducing process. Most of the Fe0 is transformed to the ferrous ion (Fe+2), added to the resultant product, and fed to a continuous stirred tank reactor (CSTR) in which Fenton oxidation occurs. This product is then sent to a sedimentation tank and pH-neutralized using a strong base such as sodium hydroxide (NaOH). The aqueous portion is drawn off and the sludge pumped from the sedimentation tank. Both tanks are monitored and controlled to optimize required additives, while monitoring of pressure drop across the pre-filter and column reactor establishes replacement requirements.
    Type: Application
    Filed: March 14, 2002
    Publication date: September 18, 2003
    Inventors: Daniel K. Cha, Pei C. Chiu, Seok-Young Oh, Byung Joon Kim
  • Publication number: 20030150804
    Abstract: The present invention relates to a process and an apparatus for separating solids from a first liquid phase, wherein the solid in a first liquid phase is brought into contact with a second liquid phase and the solid is transferred into the second liquid phase. The solid is washed in countercurrent and at least partial displacement washing takes place during the washing of the solid.
    Type: Application
    Filed: October 1, 2002
    Publication date: August 14, 2003
    Inventors: Michael Haubs, Reinhard Wagener
  • Publication number: 20030146175
    Abstract: A method and a system for separating a mixture that comprises an oil-water emulsion together with gas. The system comprises a separator tank (11) for separating oil from water in the emulsion, and means for separating gas from the emulsion. The means (7) for separating the gas from the emulsion is arranged separately upstream of the separator tank (11).
    Type: Application
    Filed: February 3, 2003
    Publication date: August 7, 2003
    Inventors: Pal J. Nilsen, Erik A. Wolff
  • Patent number: 6599418
    Abstract: An integrated apparatus that contains both the gravity settling mechanism and the dissolved-air floatation (DAF) mechanism in a compensating manner is provided. The said apparatus comprises a gravity settling chamber (34), a DAF chamber (42), a chamber connection channel (22), an air-dissolving device (38), a means for collecting treated water (24), and a water level control device (16). During treatment, heavy solid particles in water or wastewater can be quickly removed by gravity settling, while the remaining light solid particles and/or oil can be quickly removed by DAF. Thus, the apparatus of this invention is more effective and efficient compared with conventional clarifiers that employ only one clarification mechanism. Therefore, the apparatus of this invention is more compact and can achieve better effluent quality.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: July 29, 2003
    Inventor: Jianmin Wang
  • Publication number: 20030121864
    Abstract: The present invention discloses a process and an apparatus for removing deep sub-micron particles from water. The invented process includes adjusting pH value and conductivity, adding an oxidation agent, performing an electro coagulation reaction/an electro-oxidation reaction, and performing a flocculation sedimentation, etc. The invented apparatus includes a front adjustment tank for adjusting the properties of waste water, wherein the adjustment includes a pH adjustment, an electrolyte adjustment, or an oxidant addition, etc.
    Type: Application
    Filed: December 6, 2002
    Publication date: July 3, 2003
    Applicant: Industrial Technology Research Institute
    Inventors: Kon-Tsu Kin, Hong-Shiang Tang
  • Publication number: 20030116512
    Abstract: The present invention is directed to a method and system that separates first particles from second particles, or white blood cells from red blood cells, by sedimentation in a fluid chamber with debulking of one of the first or second particles or red blood cells through the inlet of the fluid chamber. The method and system further includes fractionation of the remaining particles or white blood cells into selected subsets. In one embodiment of the instant invention a blood product containing white blood cells is loaded in a separation chamber, a diluting or sedimenting agent is added to encourage rouleaux formation of any red blood cells, the cells are sedimented and the red blood cells are removed.
    Type: Application
    Filed: December 4, 2002
    Publication date: June 26, 2003
    Inventors: Glen Delbert Antwiler, Linda A. Taylor
  • Publication number: 20030062325
    Abstract: A system for separating solids from a fluid stream The system includes a first separator device mounted to a container. The container includes a settling compartment and baffle plate module, with the initial settling compartment receiving the fluid from the first separator device. The fluid stream proceeds through the baffle plate module. The solids within the fluid stream will descend to the bottom of the container. A spiral blade is positioned at the bottom of the container, with the spiral blade adapted to convey solids to a first pump member. The speed of rotation of the spiral blade may be varied. The first pump member discharges the slurry to a second separator device. The second separator device will discharge the separated fluid stream into the baffle plate module. In one embodiment, the first separator device is a linear shaker and the second separator device is a cyclone separator and linear shaker mounted in tandem.
    Type: Application
    Filed: November 4, 2002
    Publication date: April 3, 2003
    Applicant: Del Corporation
    Inventor: Robert M. Kulbeth
  • Patent number: 6540926
    Abstract: The fuel filter assembly for filtering and removing water from a fuel under pressure includes an outerhousing, an inner sleeve member, an annular space between the outerhousing and the inner sleeve member, and filtering means for filtering the fuel. The filtering means is positioned within the sleeve member. The fuel inlet is at the upper end of the outer housing and provides fluid flow between the outer housing and the inner sleeve. The fuel inlet and annular space are positioned and dimensioned to provide a downward, non-circumferential, substantially laminar flow in the annular space. The inner sleeve member extends downwardly to a position below the bottom of the filtering means. The downwardly flowing fuel and contaminants must turn 180 degrees and flow upward through the filter media to the outlet. The slow moving denser components settle out in the accumulation chamber. The accumulation chamber is the region within the lower end of the outerhousing, below the filter media and the annular sleeve.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: April 1, 2003
    Inventor: David Paul Goodrich
  • Patent number: 6537458
    Abstract: A three-phase separator (1) comprising a normally horizontal vessel (3) defining a liquid separation space (5) and a gas space (7), which vessel (3) has an inlet end space (1) provided with a feed inlet (21) and an outlet end space (15) provided with separate outlets (25, 26 and 27) for the three phases, which vessel (3) further comprises an inlet device (31) comprising a primary separator (35) arranged in the gas space (7) and a tilted return tray (38) arranged in the gas space (7) having a lower end (39) that is located near the inlet end wall (13) such that a passage (41) is defined between the lower end (39) and the inlet end wall (13).
    Type: Grant
    Filed: September 5, 2001
    Date of Patent: March 25, 2003
    Assignee: Shell Oil Company
    Inventor: Hugo Gerardus Polderman
  • Patent number: 6533944
    Abstract: The method relates to the recovery of fine sand on floating production equipment in the form of a floating grab-bucket type excavator or floating bucket chain dredger. In this case, the dredged material is dewatered and transported to shore via floating conveyor belts. The dredged material is transferred to dewatering screening machine having a dewatering deck with a dewatering coating. Below the dewatering deck the screening machine has a blind bottom covering the entire surface area, whereby in the direction of conveyance the end zone is provided with a discharge. The discharge is directed at a hydro belt separator, which has a revolving endless conveyor belt with a washing trough as the separation bed, and an ascending part leading away from the washing trough. The running direction of the conveyor belt is in the direction of the ascent, whereby the dredged material is transferred at the discharge of the screening machine to the washing trough of the hydro belt separator.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: March 18, 2003
    Inventor: Wolfgang Rohr
  • Patent number: 6506310
    Abstract: A system for separating solids from a fluid stream. The system includes a first separator device mounted to a container. The container includes a settling compartment and baffle plate module, with the initial settling compartment receiving the fluid from the first separator device. The fluid stream proceeds through the baffle plate module. The solids within the fluid stream will descend to the bottom of the container. A spiral blade is positioned at the bottom of the container, with the spiral blade adapted to convey solids to a first pump member. The speed of rotation of the spiral blade may be varied. The first pump member discharges the slurry to a second separator device. The second separator device will discharge the separated fluid stream into the baffle plate module. In one embodiment, the first separator device is a linear shaker and the second separator device is a cyclone separator and linear shaker mounted in tandem.
    Type: Grant
    Filed: May 1, 2001
    Date of Patent: January 14, 2003
    Assignee: Del Corporation
    Inventor: Robert M. Kulbeth
  • Publication number: 20020190004
    Abstract: A method for removing a solute from a fluid using magnetically conditioned coagulation includes magnetically conditioning the fluid by applying a conditioning magnetic field to enhance the precipitation of solute particles for coagulation; adding a coagulant to the fluid before, during, or after application of the conditioning magnetic field to coagulate the increased available solute particles to form colloids; and collecting the colloids for removal from the fluid.
    Type: Application
    Filed: August 22, 2002
    Publication date: December 19, 2002
    Inventors: Ionel Wechsler, Peter G. Marston
  • Publication number: 20020179544
    Abstract: An apparatus and method of use are disclosed to automatically process and transfer fluids. The apparatus may include a user-interface, clamps, pumps, spinning membranes, pressure transducers, fluid detectors, solution towers, weight scales and tubing sets to control and monitor cell washing, concentrating and harvesting procedures. In addition, the apparatus may also be used to control and monitor a variety of fluid transfer procedures. The apparatus may also be used to execute default or user-defined cell washing and fluid transfer procedures.
    Type: Application
    Filed: April 29, 2002
    Publication date: December 5, 2002
    Applicant: Nexell Therapeutics, Inc.
    Inventors: Craig Johnson, Rena Juliar, Lance Noller
  • Patent number: 6485652
    Abstract: The invention concerns a method for the physico-chemical treatment of water characterized in that it comprises at least a step consisting in causing the water to be treated in at least one settler providing non-thickened sludge and in at least one settler-thickener treating the sludge from the two settlers and part of the water to be treated. The invention also concerns a plant for implementing said method comprising means for supplying the water to be treated (6), at least a settler providing non-thickened sludge (2), at least a settler-thickener (5, 5a), means for conveying (7) at least part of the non-thickened sludge coming from the settler providing non-thickened sludge (2) to the settler-thickener (5, 5a), means for evacuating (9, 9a) treated water coming from said settler providing non-thickened sludge (2) and from said settler-thickener (5, 5a) and means for evacuating (8) the thickened sludge coming from said settler-thickener.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: November 26, 2002
    Inventors: Nicolas M. Le Poder, Didier M. Haegel
  • Publication number: 20020162807
    Abstract: A system for separating solids from a fluid stream. The system includes a first separator device mounted to a container. The container includes a settling compartment and baffle plate module, with the initial settling compartment receiving the fluid from the first separator device. The fluid stream proceeds through the baffle plate module. The solids within the fluid stream will descend to the bottom of the container. A spiral blade is positioned at the bottom of the container, with the spiral blade adapted to convey solids to a first pump member. The speed of rotation of the spiral blade may be varied. The first pump member discharges the slurry to a second separator device. The second separator device will discharge the separated fluid stream into the baffle plate module. In one embodiment, the first separator device is a linear shaker and the second separator device is a cyclone separator and linear shaker mounted in tandem.
    Type: Application
    Filed: May 1, 2001
    Publication date: November 7, 2002
    Inventor: Robert M. Kulbeth
  • Patent number: 6461481
    Abstract: A method of removing water from wet organoborane by dissolving the wet organoborane in an organic solvent in which water is incompletely soluble, decanting any insoluble water, and distilling the organic phase to remove water which may be contained therein.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: October 8, 2002
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Willie Jon Barnette, Bruce Edwin Murphree, John Joseph Ostermaier
  • Patent number: 6447685
    Abstract: The invention relates to an apparatus for separating water-containing solvent mixtures having two or more phases, using one or two gravitational separators (4, 16) and to the use of this apparatus, and also to a process for separating water-containing solvent mixtures having two or more phases. Using the novel apparatus it is possible to separate even small-density-difference solvent mixtures having two or more phases. To this end, a coalescence separator (1) has been provided upstream of the first gravitational separator (4).
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: September 10, 2002
    Assignee: Satec U.S.A. LLC
    Inventors: Hans-Udo Saal, Ralf-Matthias Saal
  • Patent number: 6413429
    Abstract: Claimed are a process and an apparatus for extracting a component dissolved in a liquid by means of liquid-liquid extraction using an extraction liquid which is immiscible or only partially miscible with the liquid, in which process the extraction liquid is dispersed in the liquid in a dispersion apparatus and then coalesced in a coalescer, after which the ex traction liquid, the specific weight of which differs by at least 5% from the specific weight of the liquid to be extracted in which the component to be extracted is to be found, is separated from the liquid by gravity in a phase separator in which process in order to obtain an efficiency per extraction stage of at least 0.9 at an average residence time of at most 15 seconds in the dispersion apparatus and of at most 300 seconds in the phase separator, at a linear velocity in the coalescer related to its cross-section of at least 30 m/hour: a.
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: July 2, 2002
    Assignee: Akzo Nobel NV
    Inventors: Berthold Berend Breman, Jan Visser
  • Patent number: 6398961
    Abstract: The present invention relates to a method and to a device for sensing low levels of iodine in an aqueous solution by using an extraction procedure whereby iodine from the aqueous solution is extracted into a substantially water-insoluble organic phase, and testing measuring the concentration of iodine in the organic phase using optical absorption techniques. The measured concentration of iodine can then be equated with concentration of iodine or iodine in the aqueous solution.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: June 4, 2002
    Assignee: Ecolab Inc.
    Inventors: Guang-jong Jason Wei, Louis Mark Holzman
  • Patent number: 6398966
    Abstract: Apparatus in fluid communication with a water leg portion of a hydrocarbon-contaminated water, e.g., a water leg portion of an offshore drilling or production platform sump tank for conveying water, separated from oil, into contact with organophilic media canisters such that the hydrocarbons and other organic materials commingled with the sump tank water will be adsorbed onto the organophilic media and detected by the embedded probe in selected canisters. The canisters are provided in a plurality of stacks and are in fluid communication with a header disposed at the bottom of the vessel housing the various stacks of canisters. Solids that do not pass through the canisters are accumulated at the bottom of the vessel and easily drained through a drain port. The water will pass through the media and will be conveyed back to the ocean water without contamination.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: June 4, 2002
    Assignee: AMCOL International Corporation
    Inventors: Jeffrey J. Smith, Jerald W. Darlington, Jr., Michael R. Johnson, John Occhipinti, Elmo Robichaux, Michael A. Berger
  • Patent number: 6395181
    Abstract: Wastewater can be treated using a combination of a settleable solids separator, such as a vortex separator and a membrane separation system. Removal and segregation of materials that adversely affect operation of the membrane separator earlier in the treatment process can improve water throughput, water quality and the lifespan of system components. Physical separation of settleable solids and floatable materials from the wastewater prior to treatment with a membrane separator can allow higher flow rates to be achieved.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: May 28, 2002
    Assignee: Great Circle Technologies, Inc.
    Inventor: Steven B. Mullerheim
  • Patent number: 6391208
    Abstract: A filter for a carpet cleaning device and method for using therefor includes a casing and a partition that extends into the casing to define a primary chamber and a secondary chamber within the casing. A main siphon with an inverted U-shape is mounted in the partition. One end of the siphon extends into the primary chamber while the other end of the siphon extends into the secondary chamber. An auxiliary siphon is located within the secondary chamber, and a pump is attached in fluid communication with the auxiliary siphon. During operation, a wastewater/debris stream is transported into the filter. The stream collects in the primary chamber and establishes a primary fluid level therein. As the primary fluid level rises, carpet fibers and other insoluble debris settle in the primary chamber. Once the primary fluid level is even with the siphon, wastewater fluid is transported from the primary chamber to the secondary chamber and establishes a secondary fluid level therein.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: May 21, 2002
    Inventor: David O. Burrow
  • Publication number: 20020056690
    Abstract: An apparatus and method are disclosed for washing manure to remove undesirable elements and produce environmentally desirable processed manure solids and a manure tea by-product. The apparatus is arranged so that the manure, which is transformed into a slurry, passes through the apparatus vertically by gravity during the washing process. The process includes the addition of most preferably nitric acid or alternatively iron salts; and a polymer.
    Type: Application
    Filed: September 18, 2001
    Publication date: May 16, 2002
    Inventor: Paul Wegner
  • Patent number: 6375843
    Abstract: A liquid solid separation apparatus having a porous metal pipe sealed inside a non-porous metal pipe which allows a portion of the liquids, e.g., hydrocarbons and water to pass through the first pipe into the non porous pipe from which they are removed while solids are retained within the porous pipe. In the process there is a system pressure which aids in the filtration and a circulating velocity which removes the detained solids. Preferably a portion of these solids with reduced liquid content are recycled back to the system, mixed with fresh feed. By recycling a porion of the recovered solid concentrate the velocity of the flow in the system kept constant and the system itself is stabilized.
    Type: Grant
    Filed: March 2, 2000
    Date of Patent: April 23, 2002
    Assignee: Environmental Safeguards, Inc.
    Inventors: J. Leon Potter, Ross D. Roberts, Jr.
  • Patent number: 6365050
    Abstract: An improved flow field-flow fractionation (flow FFF) process has been developed which permits the high-resolution separation of analytes without stopping or reversing the axial flow, introducing additional axial flow streams, or further splitting the axial flow stream. The improved procedure speeds up, streamlines, and simplifies the apparatus and the procedure without unduly concentrating the sample, permits the use of flow-sensitive detection technologies in a manner which has previously been difficult or impossible, and avoids the artifactual aggregation which is known to result from other relaxation procedures. The process also permits the calculation of the channel width w without reference to system or void peaks in the fractogram. These capabilities render the improved flow FFF procedure more accurate as well as more practical, and permit automated flow FFF separations to be routinely performed on commercially-available HPLC systems with only minor modifications.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: April 2, 2002
    Assignee: Amgen Inc.
    Inventor: Gregory Paul Cauchon
  • Publication number: 20020030013
    Abstract: Claimed are a process and an apparatus for extracting a component dissolved in a liquid by means of liquid-liquid extraction using an extraction liquid which is immiscible or only partially miscible with the liquid, in which process the extraction liquid is dispersed in the liquid in a dispersion apparatus and then coalesced in a coalescer, after which the extraction liquid, the specific weight of which differs by at least 5% from the specific weight of the liquid to be extracted in which the component to be extracted is to be found, is separated from the liquid by gravity in a phase separator, in which process in order to obtain an efficiency per extraction stage of at least 0.
    Type: Application
    Filed: January 4, 2001
    Publication date: March 14, 2002
    Inventors: Berthold Berend Breman, Jan Visser
  • Patent number: 6346199
    Abstract: A sediment filtering apparatus and a method for removing sediment from a waterway. One or more collector assemblies are secured to a river bottom and have a leading, ramp surface facing upstream and over which the water flows. As the water/sediment mixture passes the apex of the collector, the trailing edge drops off rapidly thereby reducing the stream velocity and allowing the sediment to settle from the flow. The sediment then collects on the downstream side of the collector and via one or more openings reaches an internal cavity. A suction pipe is placed under negative pressure and draws the water/sediment mixture to a filtering apparatus which then returns filtered water to the waterway. The sediment and debris filtered therefrom is then easily removed.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: February 12, 2002
    Inventor: Randall L. Tucker
  • Patent number: 6346197
    Abstract: A system and process for removing contaminants from water and wastewater, where the water or wastewater is transformed into purified water that can be discharged to the environment. Wastewater is transported through several stations for purification, including an electrochemical cell. The purification process begins by sending the wastewater to a classifier through an in-line basket strainer. The wastewater stream in the classifier is drawn through a solid-liquid hydrocyclone, which returns the solids to the classifier and sends the remaining liquid to feed tanks. Contaminants that float are removed from the wastewater by skimming from the surface of the feed tank. The wastewater underflow from the feed tanks is pumped directly to the electrochemical cell where it enters into the bottom of the cell, and exits from the top of the cell. The discharge, including coagulated solids, hydrogen gas, and oxygen gas, is mixed with a polymer as well as compressed air just prior to entering a static in-line mixer.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: February 12, 2002
    Assignee: McKay Creek Technologies Ltd.
    Inventors: Robert J. Stephenson, Bruce D. Tennant, Donald Hartle
  • Publication number: 20010045399
    Abstract: A filter for a carpet cleaning device and method for using therefor includes a casing and a partition that extends into the casing to define a primary chamber and a secondary chamber within the casing. A main siphon with an inverted U-shape is mounted in the partition. One end of the siphon extends into the primary chamber while the other end of the siphon extends into the secondary chamber. An auxiliary siphon is located within the secondary chamber, and a pump is attached in fluid communication with the auxiliary siphon. During operation, a wastewater/debris stream is transported into the filter. The stream collects in the primary chamber and establishes a primary fluid level therein. As the primary fluid level rises, carpet fibers and other insoluble debris settle in the primary chamber. Once the primary fluid level is even with the siphon, wastewater fluid is transported from the primary chamber to the secondary chamber and establishes a secondary fluid level therein.
    Type: Application
    Filed: April 17, 2001
    Publication date: November 29, 2001
    Inventor: David O. Burrow
  • Publication number: 20010040138
    Abstract: A method for separating a lighter liquid from a heavier liquid according to one embodiment of the present invention may comprise the following steps. First, the lighter liquid and the heavier liquid may be introduced into a settling tank and thereafter allowed to form a first upper liquid fraction and a first lower liquid fraction. The first upper liquid fraction may comprise the lighter liquid with residual amounts of the heavier liquid contained therein. The first upper liquid fraction is then decanted into a trough. The first upper liquid fraction decanted into the trough is then allowed to form a second upper liquid fraction and a second lower liquid fraction. The second lower liquid fraction may comprise the heavier liquid with residual amounts of the lighter liquid contained therein. The second lower liquid fraction is thereafter drained from the trough and allowed to form a third upper liquid fraction and a third lower liquid fraction.
    Type: Application
    Filed: July 19, 2001
    Publication date: November 15, 2001
    Inventor: Ramon A. Hernandez
  • Patent number: 6277286
    Abstract: A method and device for separating a fluid from a formation into several fluid components in a well is disclosed. The method and device include feeding the fluid into a mainly horizontal section of pipe located in a down-hole, mainly horizontal section of the well, such that the fluid is set to flow at a speed through a length of the mainly horizontal section of pipe such that the fluid components are separated and a boundary layer is formed between the fluid components. The fluid components with a lower density are formed in a top part of the mainly horizontal section of pipe and fluid components with a higher density are formed in a bottom part of the mainly horizontal section of pipe. The fluid components with the lower density and the fluid components with the higher density are removed through separate outlets of the mainly horizontal section of pipe.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: August 21, 2001
    Assignee: Norsk Hydro ASA
    Inventors: Terje SĂžntvedt, Per Eivind Gramme, Hielke Kamps, Per Magne Almdahl
  • Patent number: 6274044
    Abstract: A clarifier in a sewage treatment process includes efficient scum removal within the influent well, with discharge of the scum and other floatables as a dedicated waste stream separate from return activated sludge and biological scum collected in the clarifier. Foam contained within the influent well may be treated with bacteria-killing agents or with anti-foaming agents. In one embodiment the scum removal system has an inclined scum ramp at the leading edge of each of two scum removal troughs, with a forward edge below the liquid surface. The scum troughs pass through an arc of rotation, building up scum, which accumulates and is pushed forward by the scum ramp. At least once per revolution, the moving scum ramp approaches a stationary scum surface blade that extends partially under the liquid surface and provides a barrier to the forwardly pushed scum. This blade contacts and slides up the ramp, sweeping the is scum up the ramp and into the scum trough.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: August 14, 2001
    Assignee: Enviroquip, Inc.
    Inventors: Elena Bailey, Robert Shurtleff
  • Patent number: 6217777
    Abstract: Flotation apparatus (1) for the purification of polluted water, comprising a flotation vessel (3) having an inlet means (23) for supplying polluted water to said vessel, an assembly (41) of spaced elements (43, 65) defining passages for the flow of water through said elements, and outlet means for surface sludge (15, 17) and outlet means (39, 45; 57, 61) for treated water, further comprising flow directing means for forcing the incoming polluted water to reach a level above said assembly (41) and to flow downwardly through said assembly and towards said treated water outlet means (39, 45; 57, 61); and a process for the purification of polluted water by flotation performed in such apparatus.
    Type: Grant
    Filed: June 19, 1998
    Date of Patent: April 17, 2001
    Assignee: AW Creative Technologies Limited
    Inventors: Jan Dahlquist, Torsten Hedberg
  • Patent number: 6214237
    Abstract: A process for the treatment of a solid waste slurry formed from solid waste particles mixed with a liquid includes delivering a solid waste slurry to a first solid-liquid separation means for separating a first amount of the solid waste particles from the slurry, followed by delivering the solid waste slurry from the first solid-liquid separation means to a tank where the solid waste slurry is stirred to maintain the solid waste particles in suspension. The solid waste slurry is then discharged from the tank with a portion of the solid waste slurry being recirculated back to the tank while a second portion of the solid waste slurry is delivered to a second solid-liquid separation means for separating a second amount of the particles from the slurry.
    Type: Grant
    Filed: June 29, 1999
    Date of Patent: April 10, 2001
    Assignee: Allegheny Energy Supply Company
    Inventors: Raymond J. Kustra, Charles J. Weaver, Thomas L. Zimmerman, Jacob A. Vozel
  • Patent number: 6197196
    Abstract: A process for treating sulphate- and metal-containing waste water comprises adding a sulphide compound to the waste water. The sulphide compound reacts with a metal in the waste water to form a corresponding metal sulphide, which precipitates from the waste water. The precipitated metal sulphide is separated from the waste water, to obtain sulphate-containing waste water, which is subjected to biological sulphate reduction in which sulphates in the waste water are converted to sulphides.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: March 6, 2001
    Assignee: Water Research Commission
    Inventors: Peter Dale Rose, Oliver O'Connor Hart
  • Patent number: 6189549
    Abstract: A compact, self-contained skimming system for removing waste material from aqueous cleaning solutions used in parts washers. A single tank contains a sloped floor, two compartments separated by a baffle, and an opening between a bottom edge of the baffle and the floor. Waste liquid collects in the first stage compartment, where gravity initially separates water and coarse debris from the waste material containing oil and grease, some water, and fine debris. A partially immersed rotating skimmer further adsorbs the waste material. A waste collection system transfers the waste material to the second stage compartment, where gravity further separates the fine debris and additional water from the oil and grease. The oil and grease flow through a waste drainage system out of the second stage compartment. The fine debris and water flow along the downwardly sloping floor, through the opening at the bottom of the baffle back into the first stage compartment.
    Type: Grant
    Filed: May 17, 1999
    Date of Patent: February 20, 2001
    Assignee: ADF Systems, Ltd.
    Inventors: Louis B. Fontana, Gerald B. Davis
  • Patent number: 6171507
    Abstract: A method and system for treating stormwater runoff containing impurities includes collecting the runoff in a basin and allowing the runoff to settle in the basin for a predetermined time before allowing the filtration step to be initiated. The time delay is controlled by a controller sensitive rain fall, turbidity, or other variables selected by the user. During the filtration step a separator member is positioned floatingly between a filter element and impurities floating on the surface of the unfiltered water.
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: January 9, 2001
    Assignee: SWAF, Inc.
    Inventors: John R. Roy, David L. Earl, William L. Hamrick, Philip G. King
  • Patent number: 6170580
    Abstract: A method and system for collecting, defluidizing and disposing of oil and gas well drill cuttings is disclosed including a system consisting primarily of a separation tank assembly, a vacuum pump assembly, a solids collection box and a liquids collection tank. The seperating tank having an upper slurry chamber, for recieving cuttings via suction from a shaker screen trough via a suction line, and a lower liquid chamber having a strainer therein, for collecting liquids compressed from the drill cuttings. A helical conveyor screw is passed through the upper slurry chamber and the strainer located in the lower liquid chamber. An adjustable plug is provided to restrict the cuttings flow through the strainer discharge opening. When cutting are forced from the upper slurry chamber via the helical conveyor screw into the strainer against the preset tension of the adjustable plug, fluids are forced through the sides of the strainer into the lower liquid chamber where they are pumped out to a liquids collection tank.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: January 9, 2001
    Inventor: Jeffery Reddoch
  • Patent number: 6168723
    Abstract: A process and apparatus for effecting the recovery of grease and oils from an aqueous waste stream is disclosed. This is accomplished by a combination of steps which include removing coarse food solids from the waste stream, allowing the oils to separate from the water in a separation zone, removing the oil layer to a storage zone, removing the water layer to a heat recovery zone and transferring heat values from the recovery zone to the separation zone with vapor compression refrigeration. The invention saves energy by recycling the heat of the kitchen waste stream to the separation zone. The recovered oil is useful as a marketable product that can be converted into many useful products. When a fines filter is used in the process, the discharged water can be used for non-agricultural uses such as lawn watering or can be used in water closets and urinals.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: January 2, 2001
    Inventor: Steven R. Moody
  • Patent number: 6132620
    Abstract: Oil is separated from an aqueous mixture by first feeding the oil-water mixture into a separation tank and allowing the mixture to separate by gravity so that the oil rises to the surface, forming a layer above the aqueous phase; then removing the layer of oil from the surface. The lower aqueous phase, typically containing residual oil in emulsified form, is removed through an outlet near the bottom of the tank and transferred to a second tank, forming a pool therein. The water is removed from the second tank by the action of an air-operated pump through a float-controlled ball valve to an external filter for removal of residual oil.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: October 17, 2000
    Assignees: Larry P. Robinson, Charlene B. Robinson
    Inventors: Larry P. Robinson, William J. Kennedy, Jr.
  • Patent number: 6110390
    Abstract: A liquid solid separation apparatus having a porous metal pipe sealed inside a non-porous metal pipe which allows a portion of the liquids, e.g., hydrocarbons and water to pass through the first pipe into the non porous pipe from which they are removed while solids are retained within the porous pipe. In the process there is a system pressure which aids in the filtration and a circulating velocity which removes the detained solids. Preferably a portion of these solids with reduced liquid content are recycled back to the system, mixed with fresh feed. By recycling a porion of the recovered solid concentrate the velocity of the flow in the system kept constant and the system itself is stabilized.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: August 29, 2000
    Assignee: Environmental Safeguards, Inc.
    Inventors: J. Leon Potter, Ross D. Roberts, Jr.
  • Patent number: 6110386
    Abstract: Apparatus for maintaining the condition of cutting fluids in a machine tool sump and for the removal of tramp oil from the cutting fluid has a pump to draw cutting fluid from the machine tool sump and transfer the fluid to an auxiliary tank where the fluid outlet is directed to drive a turbine wheel for rotation of a shaft and simultaneously aerate the cutting fluid. Drums on the shaft are partially submerged so as to be wetted by the tramp oil content. Wiper blades bear against the drum surfaces to strip the tramp oil from the drums as they rotate. A collecting trough is positioned below the wiper contact line to receive the tramp oil as it is stripped from the drum and drain it off to a waste container. In this manner, the cutting fluid is in constant circulation, even when the machine tool is idle.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: August 29, 2000
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Jasper Underhill
  • Patent number: 6077433
    Abstract: A new process for simultaneous extraction of dispersed and dissolved hydrocarbon contaminants from water. The process is based on the principle of injecting natural hydrocarbon gas to the water feed stream under pressure and temperature conditions which permit the gas to act as a solvent for dissolved and dispersed hydrocarbon contaminants. The dispersed particles "swell" and have a reduced density which markedly improves the efficiency of the downstream separation by liquid--liquid-hydrocyclones.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: June 20, 2000
    Assignee: Cagniard de la Tour AS
    Inventors: Inge Brun Henriksen, Gary William Pace
  • Patent number: 6074561
    Abstract: In a developing, etching and stripping apparatus, photoresist developing and stripping chemicals are drawn off into separate circulatory paths in each of which they are pumped through a heat exchanger, a series of tangential filters, an ultraviolet contactor and a collection tank. Permeate from the filters is returned to the developing or stripping stage, and solutions with high concentrations of solids are removed from the collection tanks for disposal. A similar system is used to recycle metal stripping solutions such as nitric acid-containing solutions, allowing recovery of metals.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: June 13, 2000
    Assignee: PhoenAnkh Corp.
    Inventor: Julius James Jablonsky
  • Patent number: 6068779
    Abstract: A system is described for separating first and second liquids that are present in an intimate mixture consisting primarily of the first liquid, which enables recovery of a high proportion of the second liquid in a system of moderate cost for construction and operation. The system includes a screen formed of a single woven pattern of metal threads that have been woven in a uniform pattern, and that are backed by back-ups having holes larger than those of the screen. The mixture is pumped through the screen, causing the microscopic droplets of the second liquid to coalesce into much larger drops, so the drops can be rapidly recovered. The screen is very fine, with a thread count of at least 500 per inch (20 per millimeter), and the liquid is passed very slowly through the screen, at a velocity of no more than 12 inches per minute (30 cm./min.), to recover at least 70% and preferably at least 75% of the second liquid.
    Type: Grant
    Filed: April 6, 1998
    Date of Patent: May 30, 2000
    Assignee: Spintek Systems, Inc.
    Inventors: Misak Dzhragatspanyan, William A. Greene
  • Patent number: 6066264
    Abstract: An oil-water separation method to separate oil-contaminated water into clean, filtered water for use. The method comprises filtering prefiltered, coalesced oil-water in an oleophobic depth-type filter.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: May 23, 2000
    Assignee: Whatman Inc.
    Inventors: John J. Ronan, Kenneth A. Perrotta, Paul E. Rebe
  • Patent number: 6059977
    Abstract: A solids separation system may be used to separate solids, such as cuttings from drilling fluids used in well drilling operations. The system includes a settling tank having transverse baffles defining a fluid receiving chamber, a fluid output chamber and one or more intermediate chambers. Fluid introduced into the fluid receiving chamber can flow in a sinuous path through apertures in the baffles to the fluid output chamber. Solids settle to the bottom of the settling tank. A material conveyor, preferably an auger, extends along a bottom surface of the settling tank to an outlet port in the fluid receiving chamber. A centrifuge is connected to the output port to receive fluid in which solids have been concentrated. Fluid output from the centrifuge is reintroduced into the settling tank. The apparatus and method of the invention permit a single centrifuge to be used to handle a higher volume of fluid than is possible with conventional methods and apparatus. This provides significant cost savings.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: May 9, 2000
    Assignee: Grand Tank (International) Inc.
    Inventors: Brian Raymond Rowney, David King