Utilizing Plural Diverse Membranes Patents (Class 210/641)
  • Patent number: 10604611
    Abstract: A reverse-phase suspension polymerisation process for the manufacture of polymer beads comprising forming aqueous monomer beads of an aqueous solution comprising water-soluble ethylenically unsaturated monomer or monomer blend and polymerising the monomer or monomer blend to form polymer beads while suspended in a non-aqueous liquid, recovering polymer beads, and then cleaning the non-aqueous liquid in which the process comprises providing the non-aqueous liquid in a vessel (1), forming a suspension of monomer beads from the aqueous monomer or monomer blend in the non-aqueous liquid, initiating polymerisation to form polymerising beads, removing a suspension of the polymer beads in non-aqueous liquid from the vessel and recovering, water soluble or water swellable polymer beads from the suspension, in which the non-aqueous liquid contains impurities which comprise particles, and then transferring the non-aqueous liquid from the suspension to a cleaning stage, in which the cleaning stage provides a cleaned non
    Type: Grant
    Filed: July 29, 2014
    Date of Patent: March 31, 2020
    Assignee: BASF SE
    Inventors: John Scott Barratt, Aleksandra Jelicic, Pascal Hesse, Oliver Soetje, Robert Haschick, Gabriela Eugenia Fonseca Zepeda, Shankara Narayanan Keelapandal Ramamoorthy, Sandra Jeck, Jelan Kuhn
  • Patent number: 10569222
    Abstract: A membrane process unit (MPU) is configured to receive a feed stream, subject the feed stream to membrane purification to generate a product stream and a concentrate stream, and subject the concentrate stream to energy recovery to provide at least a portion of energy for membrane purification. A concentrate recycle unit (CRU) is configured to receive the concentrate stream from the MPU, subject the concentrate stream to flow regulation to generate a waste stream and a recycled concentrate stream, and combine the recycled concentrate stream with a raw feed stream to generate the feed stream which is supplied to the MPU. At least one of a flow rate of the raw feed stream, a flow rate of the waste stream, or a flow rate of the recycled concentrate stream is varied, while each of a flow rate of the feed stream, a flow rate of the product stream, and a flow rate of the concentrate stream is maintained substantially fixed.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: February 25, 2020
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Yoram Cohen, Anditya Rahardianto, Tae Kyung Lee
  • Patent number: 10308524
    Abstract: The pressure-reduced saline water treatment system combines both forward osmosis and reverse osmosis techniques for the desalination of salt water, such as seawater. A feed side of the reverse osmosis desalination unit is in fluid communication with the feed side of the forward osmosis desalination unit, such that seawater drawn through the feed side of the forward osmosis desalination unit is fed into the feed side of the reverse osmosis desalination unit. The reverse osmosis desalination unit outputs product water extracted from the seawater from a permeate side thereof. The feed side of the reverse osmosis desalination unit outputs a reject stream, which is fed to a draw side of the forward osmosis desalination unit, such that the draw side of the forward osmosis desalination unit receives the reject stream and outputs concentrated brine.
    Type: Grant
    Filed: January 15, 2019
    Date of Patent: June 4, 2019
    Assignee: Kuwait Institute for Scientific Research
    Inventors: Mansour Ahmed, Rajesha Kumar, Bhadrachari Garudachari, Yousef Jassim Easa Al-Wazzan, Jibu Pallickel Thomas
  • Patent number: 10189728
    Abstract: A fluid purification system has cells whose purifying capability can be regenerated. Some of the cells are arranged in series to reach a high level of purification. An automatic valve network is controlled to cycle the cells in a way that levels the loads on each, thereby maximizing the service interval for replacing expired cells, enabling all of the cells to be replaced at the same time after having each contributing approximately equally to the purification load, and operated such that at any one time, at least one cell is regenerated so as to enable continuous up-time.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: January 29, 2019
    Assignee: NxStage Medical, Inc.
    Inventors: Joseph Turk, William K. Weigel, Goetz Friederichs, Jeffery B. Hover
  • Patent number: 10125039
    Abstract: The method of recycling brine from a multi-stage flash desalination plant recycles the high-salinity, high-temperature brine output from a multi-stage flash desalination plant to produce diluted brine suitable for reinjection back into the multi-stage flash desalination plant as a makeup stream. The high-salinity, high-temperature brine output from the multi-stage flash desalination plant is diluted with water extracted from treated wastewater effluent output from a wastewater treatment plant, thus providing further recycling of the treated wastewater effluent. Following osmotic transfer of the diluting water from the treated wastewater effluent to produce the diluted brine, the remaining concentrated treated wastewater effluent passes through a secondary filtration system to yield a solid product and a volume of permeate water. The volume of permeate water may be further mixed with the diluted brine.
    Type: Grant
    Filed: October 24, 2016
    Date of Patent: November 13, 2018
    Assignee: Kuwait University
    Inventor: Bader Shafaqa Al-Anzi
  • Patent number: 9956635
    Abstract: To provide a method for estimating a concentration of carboxylic acid gas, which is capable of measuring safely the concentration of carboxylic acid gas such as formic acid gas or the like in a chamber of a soldering apparatus in real time, and a soldering apparatus capable of estimating the concentration of the carboxylic acid gas in the chamber. The method includes the steps of measuring a surface temperature of a same object placed in the chamber at a same point in time by using a thermometer (first thermometer) for measuring a temperature without any influence of infrared absorption by carboxylic acid, and a radiation thermometer (second thermometer) for measuring a temperature by infrared in a wavelength region that the carboxylic acid absorbs, and estimating the concentration of the carboxylic acid gas in the chamber on the basis of a temperature difference (?Tx) between temperatures indicated by the first and second thermometers.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: May 1, 2018
    Assignee: Origin Electric Company, Limited
    Inventors: Hideo Kobayashi, Naoto Ozawa, Jun Matsuda
  • Patent number: 9950300
    Abstract: [Problem] The purpose of the present invention is to provide a polyamide hollow fiber membrane having such properties that the transmission of fine particles through the membrane can be prevented effectively, the membrane has an excellent water transmissibility, the entire surface of the membrane has excellent hydrophilicity, and impurities such as metal elements are rarely eluted through the membrane. [Solution] A polyamide hollow fiber membrane produced by a TIPS method under specific production conditions has the following characteristic properties: (1) the contact angle of water on the surface of the membrane is 80° or less; (2) the external pressure water transmissibility of the membrane is 50 L/(m2·atm·h) or more; and (3) the 50 nm-particles blocking ratio of the membrane is 90% or more.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: April 24, 2018
    Assignee: UNITIKA LTD.
    Inventors: Yuki Hara, Takahiro Ono, Terumi Murata, Kuniko Inoue
  • Patent number: 9919936
    Abstract: A water recovery method for improving water recovery efficiency may include inflowing a low concentration solution including water into an in-series flow path. The in-series flow path may include a plurality of flow paths for a low concentration solution coupled in series. The method may additionally include inflowing a high concentration solution having the same concentration into a plurality of flow paths for a high concentration solution. Each of the plurality of flow paths for the high concentration solution may be connected to each of plurality of flow paths for the low concentration solution via a respective semipermeable membrane being interposed therebetween.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: March 20, 2018
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Yuya Sato
  • Patent number: 9895663
    Abstract: The integrated reverse osmosis/pressure retarded osmosis system includes a first housing configured for pretreating feed brine, a second housing, a third housing configured for pretreatment of seawater, a first splitter positioned in communicating relation with the third housing, a first pump positioned in communicating relation with the first splitter, a fourth housing positioned in communicating relation with the first pump, a mixer positioned in communicating relation with the second housing and the first splitter, a first energy recovery system positioned in communicating relation with the second housing, a second energy recovery system positioned in communicating relation with the fourth housing, and a generator. The fourth housing configured for receiving pressurized seawater and producing desalinated product water by reverse osmosis. The second housing configured to receive feed brine from an oil production waste stream and decrease the salinity of the feed brine by pressure retarded osmosis.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: February 20, 2018
    Assignee: KUWAIT INSTITUTE FOR SCIENTIFIC RESEARCH
    Inventor: Essam El-Din Farag El-Sayed
  • Patent number: 9687788
    Abstract: A process that can alleviate the internal concentration polarization and can enhance membrane performance of a forward osmosis system includes the steps of passing a fluid in a forward osmosis system from a feed solution with a first osmotic pressure, through a membrane into a draw solution comprising a draw solute with a second osmotic pressure, where the first osmotic pressure is lower than the second osmotic pressure, the membrane includes an active layer and a support layer, and the membrane is oriented such that the active layer of the membrane faces a draw side, and the support layer faces a feed side; and applying an external force to the fluid on the feed side of the membrane.
    Type: Grant
    Filed: May 30, 2013
    Date of Patent: June 27, 2017
    Assignee: King Abdullah University of Science and Technology
    Inventors: Jintang Duan, Ingo Pinnau, Eric Litwiller
  • Patent number: 9587253
    Abstract: The invention provides a method of producing a chemical product through continuous fermentation which includes filtering a culture of a microorganism or cultured cells with a separation membrane to recover a product from a filtrate and simultaneously retaining a nonfiltered fluid in, or refluxing it to, the culture, and adding fermentation materials to the culture, wherein a porous membrane having an average pore size of 0.01 ?m or more to less than 1 ?m is used as the separation membrane and the filtration is conducted with a transmembrane pressure difference in the range of 0.1 to 20 kPa. According to this method, the fermentation productivity of the chemical product can be largely elevated at high stability and a low cost.
    Type: Grant
    Filed: February 16, 2007
    Date of Patent: March 7, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Hideki Sawai, Katsushige Yamada, Takashi Mimitsuka, Kenji Sawai, Tetsu Yonehara, Yohito Ito, Masahiro Henmi
  • Patent number: 9579593
    Abstract: Disclosed herein is a replaceable fuel separation unit having a permeable substrate for separating a fluid source into at least two separate fluid streams, and delivering the two separated fluid streams to separate tanks.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: February 28, 2017
    Assignees: Corning Incorporated, ExxonMobil Research and Engineering Company
    Inventors: Paul Oakley Johnson, Brandon T Sternquist, Randall D. Partridge
  • Patent number: 9513211
    Abstract: To provide a method for estimating a concentration of carboxylic acid gas, which is capable of measuring safely the concentration of carboxylic acid gas such as formic acid gas or the like in a chamber of a soldering apparatus in real time, and a soldering apparatus capable of estimating the concentration of the carboxylic acid gas in the chamber. The method includes the steps of measuring a surface temperature of a same object placed in the chamber at a same point in time by using a thermometer (first thermometer) for measuring a temperature without any influence of infrared absorption by carboxylic acid, and a radiation thermometer (second thermometer) for measuring a temperature by infrared in a wavelength region that the carboxylic acid absorbs, and estimating the concentration of the carboxylic acid gas in the chamber on the basis of a temperature difference (?Tx) between temperatures indicated by the first and second thermometers.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: December 6, 2016
    Assignee: ORIGIN ELECTRIC COMPANY, LIMITED
    Inventors: Hideo Kobayashi, Naoto Ozawa, Jun Matsuda
  • Patent number: 9481773
    Abstract: (Semi-)continuous etching method for a fluoropolymer substrate (10) comprising steps of feeding (22) said substrate (10) in the form of a continuous ribbon wherein said substrate defines a primary surface (12), subjecting to at least one etching operations (2) a part of the primary surface (12) by means of an adhesion-promoting solution comprising a complex of an alkali metal in naphthalene, washing (4) the primary surface (12) wetted by the adhesion-promoting solution by means of a washing solution (42) comprising aqueous acetic acid/formic acid, and selectively separating a concentrated solution (24) of acetic acid/formic acid from the washing solution (42) by means of inverse osmosis operations (6, 8) at ? increasing pressures, and re-introducing at least a portion of the concentrated solution (24) of acetic acid/formic acid in the washing solution (42) to create a recirculation. The invention further relates to an etching plant.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: November 1, 2016
    Assignee: GUARNIFLON S.P.A.
    Inventors: Massimo Villano, Pasquale Stella
  • Patent number: 9458033
    Abstract: A water desalination mechanism, including: a running pipe, for fresh water; a venturi arrangement, having a first venturi nozzle, a second venturi nozzle and a branch between; the first and second nozzles; a container divided by a reverse osmosis membrane into a first side and a second side and having: a first side inlet, for contaminated water; a first side outlet, for remaining salts and/or minerals; and a second side outlet, for desalinated water.
    Type: Grant
    Filed: July 9, 2013
    Date of Patent: October 4, 2016
    Inventor: Uri Rapoport
  • Patent number: 9388059
    Abstract: Systems, methods, and devices for preparation of water for various uses including blood treatment are described. In embodiments, fluid is passed through a first filtration step which is effective for creating purified water and a pair of ultrafilters placed at the outlet. The ultrafilters are separated by an intervening flow path to prevent grow-through from the outlet end upstream. In embodiments, a recirculation path with an air removing filter helps to eliminate air from the ultimate product water.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: July 12, 2016
    Assignee: NXSTAGE MEDICAL, INC.
    Inventors: Jeffrey H. Burbank, Dennis M. Treu, Christopher S. McDowell, Goetz Friederichs
  • Patent number: 9308503
    Abstract: A method for separation of liquid mixtures with a polybenzoxazole (PBO) membrane from a self-cross-linked aromatic polyimide polymer membrane is provided.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: April 12, 2016
    Assignee: UOP LLC
    Inventors: Chunqing Liu, Zara Osman, Angela N. Troxell
  • Patent number: 9259668
    Abstract: A cleaning method of an immersion liquid includes supplying an immersion liquid on a surface of a cleaning substrate. The immersion liquid is to be used in a liquid immersion lithography apparatus. The cleaning substrate has a substrate and an organic film laminated on a top face side of the substrate. The immersion liquid is allowed to move on the substrate to remove contaminants from the immersion liquid.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: February 16, 2016
    Assignee: JSR CORPORATION
    Inventors: Kentaro Harada, Goji Wakamatsu
  • Patent number: 9128192
    Abstract: Caesium-137 irradiates electronic paper. An incoming gamma-ray from the Cs-137 interacts with a particle inside a micro-container by generating a recoil electron and/or a hole. Because the recoil electron physically leaves the particle, the particle is charged depending on the dose from the radiation source. And, the charge of the particles change, which results in a movement of the particles within the micro-container. After refreshing the electronic paper, a visible difference in the gray-scale can be seen. Thus, the visible difference in the gray-scale is an effect caused by the irradiation of the electronic paper, showing sensitivity to high energy radiation—thus, non-optimized electronic paper is sensitive to high energy radiation and can be used as a radiation dosimeter. In addition, electronic paper can be used for sensing chemical and bio-chemical agents, as well as detecting high energy radiation.
    Type: Grant
    Filed: February 2, 2011
    Date of Patent: September 8, 2015
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Marc Christophersen, Bernard F. Phlips
  • Patent number: 9107447
    Abstract: The specification provides methods for extracting xyloglucans from fruit, especially from firm fruit such as cranberries, through a sequential extraction procedure.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: August 18, 2015
    Assignee: Ocean Spray Cranberries, Inc.
    Inventors: Harold L. Mantius, Martin Foster Berry
  • Patent number: 9039899
    Abstract: Separation processes using osmotically driven membrane systems are disclosed generally involving the extraction of solvent from a first solution to concentrate solute by using a second concentrated solution to draw the solvent from the first solution across a semi-permeable membrane. Enhanced efficiency may result from using low grade waste heat from industrial or commercial sources. Pre-treatment and post-treatment may also enhance the osmotically driven membrane processes.
    Type: Grant
    Filed: April 24, 2012
    Date of Patent: May 26, 2015
    Assignee: OASYS WATER, INC.
    Inventor: Robert L. McGinnis
  • Patent number: 8999167
    Abstract: There is provided a composite porous membrane comprising a porous membrane comprised of an organic polymeric compound, and a supporting porous membrane adjacent to the porous membrane, characterized in that the organic polymeric compound constituting the porous membrane penetrates in at least part of a surface adjacent to porous membrane of the supporting porous membrane, the porous membrane having specified opening ratio, average pore diameter, standard deviation of pore diameter, ratio of through pore, average membrane thickness, standard deviation of membrane thickness and internal structure, and that the supporting porous membrane has communicating pores of 0.5 D ?m or greater average pore diameter. Further, there are provided a blood filtration membrane comprising the composite porous membrane; a leukocyte removing filter unit comprising the composite porous membrane as a second filter; and, utilizing the composite porous membrane, a cell culturing diaphragm and method of cell culturing.
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: April 7, 2015
    Assignee: Asahi Kasei Medical Co., Ltd.
    Inventors: Yasuhiro Nakano, Naoko Ishihara
  • Publication number: 20150075989
    Abstract: The invention provides methods and devices that use membranes to separate oil/water mixtures. The methods and devices have a wide range of applications, including deep seep oil exploration, oil purification, and oil spill cleanup. In some embodiments, at least one first membrane is provided, the first membrane being hydrophilic and oleophobic. The first membrane allows passage of water therethrough In some embodiments, a second membrane that is hydrophobic and oleophilic is provided in addition to the first membrane. The second membrane allows passage of oil therethrough.
    Type: Application
    Filed: March 14, 2014
    Publication date: March 19, 2015
    Applicant: Massachusetts Institute of Technology
    Inventors: Brian Richmond Solomon, Kripa K. Varanasi, Md Nasim Hyder
  • Publication number: 20150014248
    Abstract: Methods and systems for generating strong brines are disclosed in which a feed stream and a draw inlet stream are passed through a forward osmosis membrane to create a concentrate and a draw outlet stream, the draw outlet stream is passed through a reverse osmosis membrane to create a reverse osmosis permeate flow and a reverse osmosis retentate flow, the reverse osmosis retentate flow is passed through a first nanofiltration membrane to create a first nanofiltration permeate flow and a first nanofiltration retentate flow; and the first nanofiltration retentate flow is passed through a second nanofiltration membrane to create a second nanofiltration permeate flow and a second nanofiltration retentate flow. In some embodiments, the process is repeated through a third nanofiltration membrane. The process may be repeated through a third nanofiltration membrane.
    Type: Application
    Filed: July 11, 2014
    Publication date: January 15, 2015
    Inventors: John R. Herron, Edward Beaudry, Keith A. Lampi
  • Publication number: 20140374352
    Abstract: Systems and methods are disclosed for separating a continuous aqueous phase and a discontinuous organic phase from a mixture containing both phases.
    Type: Application
    Filed: June 21, 2013
    Publication date: December 25, 2014
    Inventors: John D. Brantley, Jacob M. Dietz
  • Patent number: 8877060
    Abstract: The present application relates to a method for removing pathogens from a transfusion grade platelet composition. The method comprises the steps of passing a platelet preparation through a first tangential flow filtration (TFF) device having a TFF filter, and collecting a retentate from the TFF device, wherein the retentate comprises filtered platelets to be used for transfusion. The platelet preparation comprises a platelet activation inhibitor and an anti-coagulant. During the TFF process, a diafiltration solution is added to the retentate to maintain the volume of the platelets.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: November 4, 2014
    Assignee: Biovec Transfusion, LLC
    Inventor: Lakshman R. Sehgal
  • Patent number: 8852432
    Abstract: An induced symbiotic osmosis pump (ISOP) (and method of using same) comprising: a closed loop comprising a riser pipe and a downpipe having substantially the same length fluidly communicating at a base with an induced osmosis semipermeable membrane and fluidly communicating at an opposed end with a brine pump fluidly communicating with a pressure exchanger fluidly communicating with a reverse osmosis membrane, the downpipe comprising a check valve; the induced osmosis semipermeable membrane of the closed loop fluidly communicating with an initial reverse osmosis module fluidly communicating with a brine pump fluidly communicating with a source of fluid having an initial salinity; the brine pump electronically communicating with an electrical source; and, the reverse osmosis membrane fluidly communicating with a storage tank.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: October 7, 2014
    Inventor: Maher Isaac Kelada
  • Publication number: 20140251908
    Abstract: Dialysis treatment devices and methods for removing urea from dialysis waste streams are provided. In a general embodiment, the present disclosure provides a dialysis treatment device including: 1) a first filter having a filtration membrane, 2) a urea removal unit having urease and in fluid communication with the first filter, and 3) a second filter having an ion rejection membrane and in fluid communication with the first filter and the urea removal unit.
    Type: Application
    Filed: May 20, 2014
    Publication date: September 11, 2014
    Applicants: Baxter International Inc., Baxter Healthcare S.A.
    Inventors: Yuanpang Samuel Ding, Ying-Cheng Lo
  • Publication number: 20140238938
    Abstract: An energy efficient membrane based desalination process, which utilizes an osmotically driven energy recovery sub-process. Energy recovery sub-process involves the extraction of water from low salinity first aqueous solution by using a high salinity content, pressurized second aqueous solution to draw the water from first aqueous solution across a semi-permeable membrane. High salinity content, pressurized second solution can be used to generate osmotic pressure on the low salinity content first solution to drive water from first solution to the second solution with respect to chemical potential differences. The process also harvests the Gibbs free energy of mixing in terms of pressure conservation in the second solution, while the volume of second solution is increasing by the drawn water from the first solution.
    Type: Application
    Filed: November 26, 2013
    Publication date: August 28, 2014
    Applicant: GS ENGINEERING & CONSTRUCTION CORP.
    Inventors: Sarper SARP, In-Ho YEO, Yong Gyun PARK
  • Patent number: 8801934
    Abstract: Systems and methods for osmotically assisted desalination include using a pressurized concentrate from a pressure desalination process to pressurize a feed to the desalination process. The depressurized concentrate thereby produced is used as a draw solution for a pressure-retarded osmosis process. The pressure-retarded osmosis unit produces a pressurized draw solution stream that is used to pressurize another feed to the desalination process. In one example, the feed to the pressure-retarded osmosis process is impaired water.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: August 12, 2014
    Assignees: Board of Regents of the Nevada System of Higher Education, on behalf of the Univeristy of Nevada, Reno, Colorado School of Mines
    Inventors: Andrea Achilli, Amy E. Childress, Tzahi Y. Cath
  • Patent number: 8795530
    Abstract: The present invention relates to methods and systems for optimization of dilution of a viscous starting material to isolate and/or concentrate the product of interest from the starting source material such that the process minimizes the volume of diluent and the total volume of the waste stream generated during the process as well as maximizing the yield of desired product. The system employs cross-flow filtration modules with sub-channels that are equidistant to the inlet and outlet of said modules and such modules are characterized by optimal channel height, optimal transmembrane pressure, etc., which are selected in order to achieve the best combination of product quality and production yield.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: August 5, 2014
    Assignee: Smartflow Technologies, Inc.
    Inventors: Henry B. Kopf, James A. Kacmar
  • Patent number: 8764992
    Abstract: A method of fractionating a dispersion of oxidic nanoparticles wherein at least one step of the method is a membrane crossflow filtration step, the flow of the dispersion over the membrane being brought about by means of driven rotating parts; and dispersions of oxidic nanoparticles that are obtainable by the method.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: July 1, 2014
    Assignee: Evonik Degussa GmbH
    Inventors: Roland Wursche, Goetz Baumgarten, Wolfgang Lortz, Michael Kroell
  • Patent number: 8758621
    Abstract: A method of purifying impure water contaminated with a filterable impurity and a dissolved impurity, such as seawater, comprising the steps of: providing impure water to a primary microfiltration or ultrafiltration unit to remove the filterable impurity and produce impure filtered water contaminated with a dissolved impurity; providing the impure filtered water contaminated with a dissolved impurity to a reverse osmosis unit to produce a potable water stream and a residual reverse osmosis stream; and treating the residual reverse osmosis stream prior to reuse. The treatment may be in the form of passing through a secondary filter (such as another microfiltration or ultrafiltration membrane or a cartridge filter, and the subsequently treated reverse osmosis reject may be used to backwash the microfiltration or ultrafiltration unit.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: June 24, 2014
    Assignee: Evoqua Water Technologies LLC
    Inventor: Joseph Edward Zuback
  • Publication number: 20140151300
    Abstract: Processes and systems for treating high salinity aqueous liquids containing dissolved minerals, suspended solids, colloidal solids, free oil and grease, dissolved organics, and dissolved hydrocarbons. The liquid is passed into an electrocoagulation system in fluid communication with a solids removal clarifier, pressurized ultrafiltration system, the draw side of forward osmosis, and a dilute draw water reverse osmosis system. Impaired water with high sulfate content is used as a source of deionized water for dilution of the forward osmosis draw solution. After concentration, the forward osmosis feed solution is further treated by lime soda softening and sludge from the softening system may be recycled to increase hardness precipitation and silica removal, the outfall from which may be treated by a separate ultrafiltration system and a feed water reverse osmosis system. Concentrate from the feed water reverse osmosis system can be treated to offer a zero liquid or near zero liquid discharge.
    Type: Application
    Filed: December 5, 2012
    Publication date: June 5, 2014
    Applicant: WATER & POWER TECHNOLOGIES, INC.
    Inventors: Jeffrey D. Savage, Joseph C. Jimerson, Donald J. Thomas
  • Publication number: 20140138313
    Abstract: A water recovery method for improving water recovery efficiency may include inflowing a low concentration solution including water into an in-series flow path. The in-series flow path may include a plurality of flow paths for a low concentration solution coupled in series. The method may additionally include inflowing a high concentration solution having the same concentration into a plurality of flow paths for a high concentration solution. Each of the plurality of flow paths for the high concentration solution may be connected to each of plurality of flow paths for the low concentration solution via a respective semipermeable membrane being interposed therebetween.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 22, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Yuya SATO
  • Patent number: 8728319
    Abstract: A purifying device and a process for deeply treating printing and dyeing wastewater are provided. The device includes a nanometer catalytic microelectrolysis system, a membrane filtration and separation system and a a membrane washing regeneration system. The method includes the following steps of: drawing the printing and dyeing wastewater by a first water pump (12), pumping a first part of the wastewater into a nanometer catalytic microelectrolysis tank (13) to perform catalysis microelectrolysis, and a second part of the wastewater into a neutralization tank (16) to mix with the water from the nanometer catalytic microelectrolysis tank (13) to precipitate, filtering the wastewater by a sand filtration tank (17), and then pumping the wastewater into an adsorption and filteration device of granular active carbon (18) for adsorption and filtration. The process has lower cost and higher energy efficiency, and can realize recycled water to be reused.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: May 20, 2014
    Assignee: Boying Xiamen Science and Technology Co., Ltd.
    Inventor: Shiwen Zhang
  • Publication number: 20140131281
    Abstract: A membrane filtration method and membrane filtration device including a pre-treatment membrane module that filters raw water with a filtration membrane and obtains pre-treated water; a reverse osmosis membrane module that filters the pre-treated water obtained from the pre-treatment membrane module with a reverse osmosis membrane and obtains permeate and retentate; a communicating tube channel that directly joins the pre-treated water outlet of the pre-treatment membrane module and the pre-treated water inlet of the reverse osmosis membrane module; and a branch tube channel that branches from the communicating tube channel and diverts a portion of the pre-treated water flowing in the communicating tube channel from the communicating tube channel. The filtration membrane of the pre-treatment membrane module is backwashed using the pre-treated water that has been diverted by the branch tube channel.
    Type: Application
    Filed: June 27, 2012
    Publication date: May 15, 2014
    Applicant: Toray Industries, Inc.
    Inventors: Hirofumi Morikawa, Kazunori Tomioka, Tomohiro Maeda
  • Publication number: 20140116943
    Abstract: A water purification system has a closed water channel to circulate circulating water not containing substances causing fouling at the downstream side separated from the water to be treated with a semipermeable membrane. By performing reverse osmosis membrane treatment on the circulating water of a low concentration of organic substances after reclaiming water from the water to be treated containing organic substances to the circulating water through a forward osmosis membrane in which fouling is hard to occur, the substances causing fouling can be prevented from contacting onto the reverse osmosis membrane and thus fouling can be suppressed.
    Type: Application
    Filed: May 28, 2012
    Publication date: May 1, 2014
    Applicant: Hitachi, Ltd.
    Inventor: Keiko Nakano
  • Patent number: 8696404
    Abstract: Systems for recycling slurry materials during polishing processes are provided. One system includes a polisher having an inlet and drain outlet, and a slurry storage tank to supply a slurry including a preselected material to the polisher inlet, and a recycling assembly including a cross flow filter including an inlet to receive a waste slurry including the preselected material from the polisher drain outlet, where the cross flow filter is configured to concentrate the preselected material in an outlet slurry, a density meter configured to measure a concentration of the preselected material in the filter outlet slurry, a valve coupled to the filter outlet and configured to supply the slurry storage tank, and a controller coupled to the density meter and valve, where the controller is configured to open the valve when the concentration of the preselected material reaches a first concentration threshold.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: April 15, 2014
    Assignee: WD Media, LLC
    Inventors: Qi Sun, David Graves, John P. Sargent, Lindsey A. Hamilton
  • Patent number: 8685250
    Abstract: Disclosed is an improved method for remineralizing desalinated water. The desalination system includes, but is not limited to, a conventional reverse osmosis membrane system, forward osmosis membrane system, electro dialysis system, Multi Stage Flash (MSF) system, and Multi Effect Distillation (MED) system.
    Type: Grant
    Filed: December 9, 2010
    Date of Patent: April 1, 2014
    Assignee: Doosan Heavy Industries & Construction Co., Ltd.
    Inventors: Young Chul Choi, Chunwoo Lee, Pranay Mane
  • Patent number: 8663463
    Abstract: A vent assembly is described for use in an extracorporeal fluid unit. A vent structure adjacent to a micro-porous membrane forms the assembly. The vent structure is porous and changes color when the vent structure becomes wet, thereby providing a visual indication that the vent structure has been exposed to liquid.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: March 4, 2014
    Assignee: Fresenius Medical Care Holdings, Inc.
    Inventors: Colin Weaver, Martin Joseph Crnkovich, Michael Emmanuel Kotsos, John Marion Frazer
  • Patent number: 8652333
    Abstract: A process for removing a solvent from a source solution, said process comprising a) contacting the source solution with one side of a selectively permeable membrane, b) contacting a draw solution having a higher osmotic pressure (higher solute concentration) than the source solution with the opposite side of the membrane, such that solvent from the source solution passes across the membrane to dilute the draw solution by direct osmosis, c) removing solvent from the diluted draw solution to regenerate the draw solution, and d) recycling the regenerated draw solution to step a), characterized in that a portion of the draw solution is discarded or treated before and/or after the draw solution is regenerated in step c) so as to reduce the concentration of any solute species present in the draw solution from the source solution.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: February 18, 2014
    Assignee: Surrey Aquatechnology Limited
    Inventor: Peter Nicoll
  • Patent number: 8629291
    Abstract: Process and steps for the production of biodiesel and/or glycerin from feedstock are provided.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: January 14, 2014
    Assignee: Menlo Energy Management, LLC
    Inventors: Gaurav Shah, Sunil Suri
  • Patent number: 8623214
    Abstract: Various embodiments described herein provide methods and apparatus for producing purified water from sea water or some other salty or brackish water source by using brackish concentrate mixed with salty water. The various embodiments also provide methods and apparatus for the treatment of toxicity of brackish concentrate, which brackish concentrate exhibits on aquatic life inhabiting the area of discharge of the brackish concentrate, as well as a method for environmentally safe disposal of brackish concentrate.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: January 7, 2014
    Assignee: Poseidon Resources IP LLC
    Inventor: Nikolay Voutchkov
  • Publication number: 20130341272
    Abstract: Ultra-low energy membrane-based dewatering systems and methods are provided herein. Dewatering systems of the invention employ both micro-filtration and forward osmosis, and optionally employ settling, to concentrate biomass at a low concentration, such as about 0.5 g/L, to a concentration of about 50 g/L or more.
    Type: Application
    Filed: March 14, 2013
    Publication date: December 26, 2013
    Applicant: Algae Systems, LLC
    Inventors: Sherwin Gormly, Matthew Atwood, Andrew Septimus, John Perry Barlow
  • Patent number: 8596465
    Abstract: There is provided a ceramic filter provided with a ceramic porous membrane having few defects, small and uniform membrane thickness, and high resolution performance. The ceramic filter includes: a porous substrate which is a microfiltration membrane (MF membrane), a titania UF membrane which is an ultrafiltration membrane (UF membrane) formed on the porous substrate and has an average pore size of 2 to 20 nm and an average thickness of 0.1 to 1.0 ?m, and a silica membrane which is formed on the titania UF membrane and a ceramic porous membrane a part of which has penetrated into pores of the titania UF membrane or into pores of the UF membrane and the porous substrate.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: December 3, 2013
    Assignee: NGK Insulators, Ltd.
    Inventors: Tatsuya Hishiki, Ichiro Wada
  • Patent number: 8591739
    Abstract: The present invention discloses a method and apparatus for separating particles and dissolved matter from a fluid stream. Specifically, the present invention includes a first pressure source which transports untreated fluid into a separator annulus with a filter element disposed therein. The untreated fluid is placed under appropriate pressure sufficient to produce turbulent flow, increased particle kinetics and/or cavitation physics allowing the desired fluid to penetrate and pass into and through the filter media. The filtered fluid is then transported to a collection tank. The contaminant particulate matter retained on the exterior of the filter media may be removed by the instantaneous reverse pressurization of the separator annulus by a second pressure source thereby removing the contaminant particles away from contact with the filter media, and which may then be transported to a waste collection tank or a concentrator for further treatment.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: November 26, 2013
    Assignee: Tervita, LLC
    Inventors: Raymond Ford Johnson, Markley Dean Johnson, Rodney Grage
  • Patent number: 8586788
    Abstract: A method for producing of ultra-clean and high-purity electronic acetic acid is disclosed. The method including following steps: Step 1, industrial acetic acid is fast distilled; Step 2, filtering the fraction by membrane of 0.05˜0.3 ?m aperture; Step 3, rectification; Step 4, membrane filtration again. Due to the adoption of the technical scheme above, the ultra-clean and high-purity electronic grade acetic acid which purity is 99.8% is produced. The content of single metal ion is lower than 1 ppb and the content of particulates which is ?0.5 ?m is lower than 5 pcs/ml. The method of the invention will help to reduce energy consumption, to simplify the operation, and to achieve the high security.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: November 19, 2013
    Assignee: Asia Union Electronic Chemical Corporation Shanghai
    Inventors: Jiarong Zhan, Curtis Dove, I-Hsing Lin
  • Publication number: 20130292331
    Abstract: The invention includes a process for recovering ionic liquids used in the treatment of biomass for production of biofuels and other biomass-based products. Ionic liquid recovery and purification minimizes waste production and enhances process profitability.
    Type: Application
    Filed: November 9, 2011
    Publication date: November 7, 2013
    Applicants: THE UNIVERSITY OF TOLEDO, SUGANIT SYSTEMS, INC.
    Inventors: Glenn Lipscomb, Sasidhar Varanasi, Praveen Paripati, Anantharam P. Dadi
  • Patent number: 8545703
    Abstract: Process and steps for the production of biodiesel and/or glycerin from feedstock are provided.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: October 1, 2013
    Assignee: Menlo Energy Management, LLC
    Inventors: Gaurav Shah, Sunil Suri