Hyperfiltration (e.g., Reverse Osmosis, Etc.) Patents (Class 210/652)
  • Patent number: 10843243
    Abstract: The present invention relates to methods and compositions for water treatment and environmental remediation using nanoparticle supported lipid bilayers (NP-SLBs). In one embodiment, the NP-SLBs are single or multilayer lipid bilayers of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) supported by silica.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: November 24, 2020
    Inventors: Stephanie L. Wunder, Bojeong Kim
  • Patent number: 10781122
    Abstract: Laundry, industrial or food processing wastewater is purified to the degree that it can be reused. Water quality is ensured through the final process of reverse osmosis (“RO”) which removes dissolved contaminants such as mineral hardness, soils and residual detergents. The process combines a ceramic tubular cross-flow membrane filter to remove the suspended solids, oils and greases ahead of the RO. The RO process employs high temperature, low fouling membranes. This enables the RO process to operate sustainably, i.e. without fouling, plugging or membrane degradation.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: September 22, 2020
    Inventors: Carroll Gorrell, Gerard Johan Van Gils
  • Patent number: 10744460
    Abstract: A water treatment subsea installation and method are disclosed, adapted for scaling prevention and treatment of raw seawater into process water suitable for use in subsea hydrocarbon production. The water treatment installation comprises a seawater inlet to a primary filtration unit wherein a filtration membrane separates a receiving chamber from a permeate chamber having an outlet for treated water. A pump is installed in fluid flow communication with the treated water outlet, a recirculation loop feeding a portion of the treated water via a subsea electro-chlorinator back to the water stream upstream or downstream of the membrane of the primary filtration unit, and a secondary filtration unit is installed in the treated water stream between the primary filtration unit and the electro-chlorinator.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: August 18, 2020
    Assignee: Vetco Gray Scandinavia AS
    Inventors: Zamir Alam, Jose Luis Plasencia Cabanillas, Asal Amiri
  • Patent number: 10684213
    Abstract: A freestanding coating membrane is fabricated and is tested for ionic transport. An adhesive liner is situated on a flat surface, paint is poured on the liner, a leveling blade is used to impart a uniform thickness to the uncured paint, the paint when completely cured is peeled from the liner, and the thickness of the resultant freestanding membrane is measured. Saline water is placed in an open-ended reservoir in communication with an assembly holding the freestanding membrane and containing deionized water. A pump causes water to circulate through the assembly via a conduit, which is connected at both ends to the assembly. The electrical conductivity of the circulating water is monitored for an appropriate duration for indication of salt concentration. The conductivity is initially low because the circulating water is originally deionized, and gradually increases commensurately with the amount of salt (e.g., chloride) ions passing through the membrane.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: June 16, 2020
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Jamaal D. Delbridge, Erick O. Satchell
  • Patent number: 10603635
    Abstract: Improved reverse osmosis (RO) systems include at least first and second stages wherein each stage has at least one RO membrane, each stage has a feed stream inlet, permeate stream outlet, and concentrate stream outlet, the feed stream inlet of the second stage is coupled to the concentrate stream outlet of the first stage, the feed stream entering the first stage is pressurized to a first pressure and the feed stream entering the second stage is pressurized to a second pressure, the second pressure being greater than the first pressure. The systems include M number of reverse osmosis membranes in the first stage and N number of reverse osmosis membranes in the second stage, wherein M?N. The first pressure and second pressure are configured so that flux of the permeate streams of the first stage and the second stage has a spatial variance that is minimized.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: March 31, 2020
    Assignee: Massachusetts Institute of Technology
    Inventors: Quantum J. Wei, Ronan Killian McGovern, John H. Lienhard, V
  • Patent number: 10532938
    Abstract: A membrane filtration system with reverse osmosis (RO) or nanofiltration (NF) elements is adapted to provide high recovery from difficult wastewater. The system has a plurality of stages. The system is configured to provide concentrate staging. The last stage also has concentrate recirculation. The valves and pumps of the system are arranged such that the order of flow and a recirculation pump may be switched between the first stage and the last stage at some times.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: January 14, 2020
    Assignee: BL Technologies, Inc.
    Inventor: Jianwen Zhai
  • Patent number: 10500544
    Abstract: An example water purification system for purifying high concentration feed solutions includes a high rejection forward osmosis module, one or more low rejection modules, and a high rejection reverse osmosis module. The low rejection modules may have different rejection levels. The system may be pressurized by one or more pumps. One or more of the low rejection modules may include one or more nanofiltration (NF) membranes. The draw solution may comprise a monovalent salt, a multivalent salt, or a combination of both.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: December 10, 2019
    Assignee: Porifera, Inc.
    Inventors: Charles Benton, Olgica Bakajin, Carl Lundin
  • Patent number: 10479706
    Abstract: An apparatus, system and method to purify water is disclosed. In addition, the apparatus, system and method can effectively discharge the brine effluent. The apparatus can comprise an offshore structure, wherein the offshore structure comprises a water intake device connected to a pre-desalination filters connected to a plurality of reverse osmosis filters in communication with a purified water line and effluent discharge device. A plurality of filters for filtering the water from the intake, filter the water to remove solid contaminates before running the filtered water through the reverse osmosis system to the discharge device and purified water lines. Herein also disclosed is a wastewater discharge system. In an embodiment, the system comprises a control panel that controls, the offshore structure plurality of filters, plurality of reverse osmosis filters, purified water line and effluent discharge device, to achieve favorable water purification.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: November 19, 2019
    Assignee: Katz Water Tech, LLC
    Inventor: Gary P. Katz
  • Patent number: 10442701
    Abstract: A water treating method includes a step of installing a cavitation generation ring in a part of a water communication pipe, and a step of passing water through the inside of the cylindrical portion at high pressure, thereby cavitation being generated in the cylindrical portion and clusters of molecules of water being fined. A cavitation generation ring is configured to be installed in a part of a water communication pipe. A water treating apparatus includes a cavitation generation ring, a water communication pipe and a pressurizing pump for water.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: October 15, 2019
    Assignee: Eco Prana Co., Ltd.
    Inventor: Kaoru Uno
  • Patent number: 10427101
    Abstract: Provided is a reverse osmosis treatment system capable of simultaneously and efficiently recovering energy generated both at brine and permeate sides. The system comprises a branched portion configured to divide second to-be-treated water into third and fourth to-be-treated water; a high-pressure pump configured to pressurize the third to-be-treated water thereby to feed fifth to-be-treated water having a higher pressure than the to-be-treated water before divided; a displacement type of first energy recovery device configured to exchange pressures between the fourth to-be-treated water and brine thus separated by a reverse osmosis treatment device, thereby to produce sixth to-be-treated water having a higher pressure than the fourth one; and a second energy recovery device configured to raise a pressure of the third to-be-treated water located at a downstream side of the branched portion with a pressure of first permeate thus separated by the reverse osmosis treatment device.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: October 1, 2019
    Assignee: HITACHI, LTD.
    Inventors: Hiroki Miyakawa, Kotaro Kitamura, Masayuki Matsuura, Takanori Oshikiri, Yusuke Okawa
  • Patent number: 10427109
    Abstract: A composite semipermeable membrane including: a substrate; a porous supporting layer formed on the substrate; and a separation functional layer formed on the porous supporting layer, in which the separation functional layer contains crosslinked wholly aromatic polyamide as a main component and contains a carboxy group, a ratio of (molar equivalent of the carboxy group)/(molar equivalent of an amide group) in functional groups contained in the separation functional layer is 0.40 or more, and an average ratio of oxygen atoms/nitrogen atoms in front and rear sides of the separation functional layer is 0.95 or less.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: October 1, 2019
    Inventors: Keisuke Yoneda, Shunsuke Tabayashi, Takafumi Ogawa, Takao Sasaki, Masahiro Kimura
  • Patent number: 10371119
    Abstract: A hydroelectric power system and pump suitable for the system are disclosed which can make efficient use of the energy available in water flows with considerably variable flow rates. A simple, compact variable displacement axial piston pump can be operated so as to provide an essentially constant output pumping pressure and variable output volume that varies efficiently in accordance with water flow rate. The system is particularly suitable for shoreline tidal power generation and provides firm power output throughout the tidal slacks occurring during the tidal reversals.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: August 6, 2019
    Assignee: Yourbrook Energy Systems Ltd.
    Inventor: Laird Galen Bateham
  • Patent number: 10316280
    Abstract: A system for the production of ethanol is disclosed. The system comprises a system for recycling water in an ethanol production process. The system may comprise: a water supply that supplies water to the ethanol production process, a cooling tower system that supplies water to the ethanol production process, and a treatment system that supplies water to the ethanol production process. The treatment system may be a reverse osmosis system that supplies a retentate stream to the ethanol production process.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: June 11, 2019
    Assignee: POET Research, Inc.
    Inventor: Rachel L. Kloos
  • Patent number: 10309426
    Abstract: Exchanger devices include a plurality of fixed exchange ducts and a rotating valve assembly for directing flow to and from the plurality of exchange ducts. Methods of exchanging pressure between fluid streams may include directing fluids through an exchange device and pressurizing a fluid in the plurality of exchange ducts of the exchanger device.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: June 4, 2019
    Assignee: Flowserve Management Company
    Inventors: Daniela Lehner, Andrew Schevets, Andreas Dreiss
  • Patent number: 10214438
    Abstract: Systems and processes for purifying and concentrating a liquid feed stream are disclosed. In the systems, the concentrated liquid output from the high pressure side of a reverse osmosis stage is used as the draw solution in the low pressure side of the reverse osmosis stage in a configuration called osmotically assisted reverse osmosis. This reduces the osmotic pressure differential across the membrane, permitting high solute concentrations to be obtained, hastening the purification of the liquid. Reduced system pressures are also obtained by arranging multiple osmotically assisted reverse osmosis stages in a cross-current arrangement. Overall system energy consumption is reduced compared to conventional thermal processes for high concentration streams.
    Type: Grant
    Filed: June 5, 2017
    Date of Patent: February 26, 2019
    Inventors: Kurt Blohm, Richard Peterson, Ann E. Lane, Slawomir Winecki
  • Patent number: 10214437
    Abstract: Systems and processes for purifying and concentrating a liquid feed stream are disclosed. In the systems, the concentrated liquid output from the high pressure side of a reverse osmosis stage is used as the draw solution in the low pressure side of the reverse osmosis stage in a configuration called osmotically assisted reverse osmosis. This reduces the osmotic pressure differential across the membrane, permitting high solute concentrations to be obtained, hastening the purification of the liquid. Reduced system pressures are also obtained by arranging multiple osmotically assisted reverse osmosis stages in a cross-current arrangement. Overall system energy consumption is reduced compared to conventional thermal processes for high concentration streams.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: February 26, 2019
    Inventors: Kurt Blohm, Richard Peterson, Ann E. Lane, Slawomir Winecki, Darwin Argumedo
  • Patent number: 10167217
    Abstract: A process for the industrial production of sea water (M3) that is basically suitable for alimentary use, includes the following steps: drawing sea water with corresponding decantation (3); filtration (4); and sterilization (5), until a purified sea water (M1) is obtained; the process being characterized in that it envisages the further steps of: boron abatement (6) until a sea water is obtained with a boron content of less than one milligram per liter (M2); further filtration (7); sterilization (8) of the possible residual microorganisms; continuous and strict analyses, examinations, and checks (9) of the sea water in the respective various steps of purification thereof, to guarantee that a sea water (M3) is obtained that is microbiologically pure, filtered, and hence free from any pathogenic agents; and storage in tanks or bottling (10) of the purified sea water ready for use in various applications, amongst which basically alimentary use.
    Type: Grant
    Filed: July 4, 2014
    Date of Patent: January 1, 2019
    Assignee: STERALMAR SRL
    Inventor: Pietro Di Liddo
  • Patent number: 10144654
    Abstract: Selective scaling in water treatment systems in which desalination is performed is generally described. According to certain embodiments, the location of the formation of solid scale within a water treatment system is controlled by adjusting one or more system parameters, such as the temperature and/or flow velocity of a saline stream within the water treatment system.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: December 4, 2018
    Assignee: Gradiant Corporation
    Inventors: Prakash Narayan Govindan, Steven Lam, Maximus G. St. John, Jonn-Ross Andrews
  • Patent number: 10058820
    Abstract: A piping arrangement for a water purification apparatus that utilizes a number of manifolds and pipes to replicate the piping system of a water purification apparatus in a more compact manner. Metal pipes are joined to manifolds using elastomeric ring connections. Each manifold is designed with internal conduits that replicate the path of pipes in a water purification system.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: August 28, 2018
    Inventors: Chin Jin Foo, Kok Sing Goh
  • Patent number: 10040533
    Abstract: A ballast water treatment apparatus for a ship includes a water collection part for collecting sea water, a forward osmosis process unit for producing ballast water and treatment water obtained by desalinating the sea water collected through the water collection part, and a ballast water tank for storing the ballast water produced by the forward osmosis process unit. Since the sea water is treated using a forward osmosis process, fresh water required within the ship can be supplied and the treated sea water can be used as ballast water. In addition, since waste heat and carbon dioxide generated in the ship are used to treat the sea water, the ballast water can be treated and produced in a low-cost and high efficient manner.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: August 7, 2018
    Inventors: Sung Hoon Kim, Won Joon Choi, Choa Mun Yun
  • Patent number: 9942332
    Abstract: A method and/or technique for geolocation safety awareness is provided herein. When a user, having a client device, travels to a location, threats associated with that location may not be known to the user. To determine a safety of the location, the location of a client device may be determined. A search for safety information about the location may be performed, and a threat level may be determined based upon the safety information. When the threat level exceeds a threat threshold, a security operation may be performed. The security operation may comprise presenting a warning notice to the user and/or activating a security timer.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: April 10, 2018
    Assignee: EXCALIBUR IP, LLC
    Inventors: Chris Chan, Shivakumar Ningappa, Shatakshi Goyal, Katrina Kimball Clark Tempero, Yu-Chin Tai, Ameya Barsode, Clarence Lok Him Leung
  • Patent number: 9908059
    Abstract: A very low pressure and entirely mechanical sea water desalination device is described, which may be built and operated at a fraction of the current costs for the desalination of sea water. The desalination device is used to purify polluted or otherwise impure water and is a device is easily scaled and can be used in a very small facilities up to the largest facilities for desalinating or purifying water. The device operates with sunlight and ambient heat, and therefore will be very inexpensive to operate in desert and tropical regions; and slightly more expensive to operate in cooler regions, yet still substantially less expensive than the existing systems. The device reduces the cost of potable water made from sea water or other polluted sources to a level which is comparable to or less than the cost of such water received from traditional local fresh-water sources.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: March 6, 2018
    Inventor: Michael Henry McGee
  • Patent number: 9885069
    Abstract: Process for the production of lipids from biomass including at least one polysaccharide, which comprises fermentation of a biomass hydrolysate using an oleaginous microorganism and separation of oleaginous cellular biomass comprising lipids. An aqueous fraction obtained by reverse osmosis of a spent fermentation broth is recycled as a feed for growth of the oleaginous microorganism. The lipids thus obtained can be advantageously used in the production of biodiesel or green diesel which can be used as such, or in a mixture with other automotive fuels.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: February 6, 2018
    Assignee: Eni S.p.A.
    Inventors: Rossella Bortolo, Roberta Miglio, Daniela Cucchetti
  • Patent number: 9851700
    Abstract: A method is provided for merging different load forecasts for power grid centers. Area load forecasts are accepted from load forecast engines. A relational database saves load forecast engine data. A comprehensive operating plan integrates individual load forecasts into a composite load forecast to present a comprehensive, synchronized and harmonized load forecast.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: December 26, 2017
    Assignee: General Electric Technology GmbH
    Inventors: David Sun, Kwok Cheung, Kenneth Chung, Tory McKeag
  • Patent number: 9725339
    Abstract: Provided is a reverse osmosis treatment apparatus which decreases operation power by utilizing a back pressure caused by regulating an amount of permeated water. The reverse osmosis treatment apparatus includes a first pressure vessel for a primary treatment of untreated water, and a second pressure vessel for a secondary treatment of the water treated by the primary treatment, wherein a reverse osmosis membrane element having a reverse osmosis membrane or the plurality of reverse osmosis membrane elements are arranged in series along a water collection pipe in the first pressure vessel and the second pressure vessel. The first pressure vessel includes a first outlet pipe which discharges permeated water, and a permeated water flow control valve connected to the first outlet pipe and regulating a pressure in the first pressure vessel. An energy recovery apparatus is provided between the first outlet pipe and the permeated water flow control valve.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: August 8, 2017
    Assignee: HITACHI, LTD.
    Inventors: Kotaro Kitamura, Shinichi Yoshikawa, Hiroki Miyakawa
  • Patent number: 9662613
    Abstract: In one embodiment, a method includes providing agricultural grade gypsum to a mixing device using a conveyor, providing a fluid to the mixing device using a pump, mixing the agricultural grade gypsum with the fluid to produce a gypsum slurry using the mixing device, and pumping the gypsum slurry to a storage tank. In another embodiment a system includes a conveyor providing an agricultural grade gypsum, a pump providing a fluid, a mixing device configured to mix the agricultural grade gypsum provided by the conveyor with the fluid provided by the pump to produce a gypsum slurry, and a slurry pump configured to pump the gypsum slurry from the mixing device to a storage tank.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: May 30, 2017
    Assignee: Enviro Water Minerals Company, Inc.
    Inventor: Paul Steven Wallace
  • Patent number: 9623379
    Abstract: A filtration element with a fiber-reinforced shell and a method for fabricating the same. The fabrication method including the steps of: i) coating a multi-strand fiber with a liquid resin, ii) winding the coated fiber about the cylindrical filtration element, and iii) solidifying the resin to form a fiber-reinforced shell. The method is characterized by utilizing a spliced fiber formed by: a) aligning an end of a first multi-strand fiber with an end of a second multi-stand fiber such that the aligned fibers extend along a common axis (X), b) wrapping a layer of a heat-shrinkable film about the outer diameter of the aligned ends of the fibers wherein heat-shrinkable film includes a layer of adhesive that contacts the overlapping strands of the fibers, and c) heating the film so that the film draws inward upon the aligned ends of each fiber and forms an integral bond such that the effective cross-sectional area of a section of fiber.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: April 18, 2017
    Assignee: Dow Global Technologies LLC
    Inventors: Thomas M. Lanz, Allan D. Hammel
  • Patent number: 9592475
    Abstract: A method of forming a filter with uniform pore sizes includes synthesizing a moiety so as to form a plurality of like platelets having a precisely sized pore extending therethrough, distributing the plurality of like platelets about a membrane having apertures therethrough, and bonding the plurality of platelets around the apertures to form precisely sized pores through the membrane. A filtration membrane is also disclosed which provides a porous membrane having a plurality of apertures therethrough, and a plurality of platelets, wherein each platelet has a pore therethrough. The platelets are positioned over or in the apertures.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: March 14, 2017
    Assignee: Lockheed Martin Corporation
    Inventors: Randall M. Stoltenberg, Peter V. Bedworth
  • Patent number: 9512041
    Abstract: Processes for fabricating ceramic membranes include providing a porous substrate having at least one inner channel extending therethrough and having surfaces defined by porous walls, depositing a coating slurry on surfaces of the inner channel(s), and sintering. Sintering temperatures for the processes range from about 400° C. to 800° C. Coating slurries for use in the processes include a boehmite sol and a colloidal suspension of porous alumina particles.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: December 6, 2016
    Assignee: General Electric Company
    Inventors: Kevin Paul McEvoy, Anthony Yu-Chung Ku, Randall Scott Hagerdon, Nicholas Edward Antolino
  • Patent number: 9480952
    Abstract: A method for forming a lattice with precisely sized holes includes disposing cutter molecules with species attached about the periphery of each molecule on to the lattice. The method continues with the species cutting molecular bonds of the lattice so as to form precisely sized holes in the lattice. The edges of the holes may then be functionalized.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: November 1, 2016
    Inventors: Steven W. Sinton, Peter V. Bedworth
  • Patent number: 9474998
    Abstract: The present invention relates to an apparatus for integrating carbon dioxide capture and desalination.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: October 25, 2016
    Assignee: Industry-University Cooperation Foundation Hanyang University Erica Campus
    Inventors: Sung Mo Koo, Sung Min Shim, Sang Jin Lee
  • Patent number: 9475717
    Abstract: The present invention relates to water purification systems and uses thereof. In particular, the present invention relates to the use of water filtration systems to combat Legionella bacterial contamination of industrial and commercial water systems, such as grocery store misting systems.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: October 25, 2016
    Inventors: Ken Clark, Skip Heffernan
  • Patent number: 9434630
    Abstract: A water treatment device including an electro-coagulation (EC) unit for treating a stream of feed water to produce a stream of EC treated water of lower salinity than the stream of feed water, an electrical separation unit for treating the stream of EC treated water to obtain a stream of product water of lower salinity than the EC treated water, and a precipitation unit for providing a stream of wash water to wash the electrical separation unit and become a stream of reject water flowing back to the precipitation unit, wherein precipitation in the precipitation unit produces the stream of wash water of lower salinity than the stream of reject water.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: September 6, 2016
    Assignee: General Electric Company
    Inventors: Zijun Xia, Wei Cai, Rihua Xiong, Chengqian Zhang, Jiyang Xia, Andrew Jon Zaske
  • Patent number: 9404106
    Abstract: A method for preventing, reducing and/or eliminating the fouling of a composite material is provided, the composite material comprising (1) a plurality of conductive or semiconductive nanotubes, which are aligned parallel to one another, and (2) a matrix arranged between the conductive or semiconductive nanotubes, the composite material in the form of an isoporous membrane with nanopores which correspond to the pores of the conductive or semiconductive nanotubes and optionally to the pores of the matrix arranged between the conductive or semiconductive nanotubes, the method comprising applying an electric field to the composite material, wherein the fouling is prevented, reduced and/or eliminated at the surface, at and in the pores of the composite material.
    Type: Grant
    Filed: October 8, 2012
    Date of Patent: August 2, 2016
    Inventors: Pascal Boulanger, Alexandre Brouzes
  • Patent number: 9309182
    Abstract: This invention relates to novel derivatives of 4-hydroxybutyric acid and prodrugs thereof, and pharmaceutically acceptable salts of the foregoing. This invention also provides pharmaceutical compositions comprising a compound of this invention and the use of such compositions in methods of treating narcolepsy, fibromyalgia, other disorders or conditions that are beneficially treated by improving nocturnal sleep or by administering sodium oxybate.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: April 12, 2016
    Assignee: Concert Pharmaceuticals, Inc.
    Inventors: Roger D. Tung, Adam J. Morgan
  • Patent number: 9309138
    Abstract: Provided is a fresh water production method applying a combined water-treatment technology employing a plurality of semi-permeable membrane units, the method enabling prevention of problems caused by growth of a biofilm and allowing effective use of an injected chemical agent and an injected neutralizing agent. The fresh-water production method produces fresh water by treatment of source water by a semi-permeable membrane treatment device, the concentrated water resulting from the treatment by the semi-permeable membrane treatment device is mixed with other source water, and the water mixture is treated by a second semi-permeable membrane treatment device. A first chemical agent is injected continuously or intermittently into the source water and a second chemical agent is injected continuously or intermittently into the source water.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: April 12, 2016
    Inventors: Wakako Ogiwara, Hiroo Takabatake, Masahide Taniguchi
  • Patent number: 9227186
    Abstract: Methods for the synthesis of compounds of the formula A2xMxSn3-xS6, where x has a value in the range from 0.5 to 1; A is Li+, Na+, K+, or Rb+; and M is Mg2+, Mn2+, Zn2+, or Fe2+, are provided. Also provided are methods of remediating fluid samples using the compounds.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: January 5, 2016
    Assignee: Northwestern University
    Inventors: Mercouri G. Kanatzidis, Zohreh Hassanzadeh Fard
  • Patent number: 9131698
    Abstract: Provided are biocidal compositions comprising: a hydroxymethyl-substituted phosphorus compound and a polymeric biguanide. The compositions are useful for controlling microorganisms in aqueous or water-containing systems.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: September 15, 2015
    Assignee: Dow Global Technologies LLC
    Inventor: Bei Yin
  • Patent number: 9085469
    Abstract: A method or process for removing perchlorate ions from water includes mixing water containing perchlorate ions with a reducing agent such that the perchlorate ions and the reducing agent undergo an oxidation-reduction reaction. During the oxidation-reduction reaction, perchlorate ions are reduced to chloride ions and the reducing agent is oxidized. The oxidized reducing agent is separated from the water containing chloride ions and the oxidized reducing agent is regenerated and reused in the reduction of the perchlorate ions.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: July 21, 2015
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Kashi Banerjee, Charles D. Blumenschein
  • Patent number: 9073763
    Abstract: A process for treatment of water. Hardness and non-hydroxide alkalinity are removed from feedwaters to an extent sufficient to avoid scaling when concentrated. Sparingly ionizable components in the feedwater are urged toward increased ionization by increasing the pH of the feedwater. In this manner, species such as silica become highly ionized, and (a) their rejection by membranes used in the process is significantly increased, and (b) their solubility in the reject stream from the membrane process is significantly increased. Sparingly ionized species such as boron, silica, and TOC are highly rejected. Recovery ratios of ninety percent (90%) or higher are achievable with many feedwaters, while simultaneously achieving a substantial reduction in cleaning frequency of membranes used in the process.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: July 7, 2015
    Inventor: Debasish Mukhopadhyay
  • Patent number: 9061925
    Abstract: A liquid or water treatment apparatus comprising one or both of an electrodialysis cell and a cavitation unit. The cavitation unit generates cavitation in the liquid by flow of the liquid into a constriction where cavitation bubbles are formed and then to an outlet where cavitation bubbles implode, and the constriction includes an aperture formed by walls which are long and narrowly spaced in a plane normal to the flow direction. The electrodialysis cell is arranged with an inlet flow path for directing only part of a quantity of water to be treated through the electrodialysis cell, and an outlet flow path for returning a product of the electrodialysis cell to the remainder of the water.
    Type: Grant
    Filed: September 1, 2009
    Date of Patent: June 23, 2015
    Assignee: OCEANSAVER AS
    Inventor: Aage Bjørn Andersen
  • Publication number: 20150144562
    Abstract: The present disclosure provides systems for data center cooling and water desalination. In some aspects, the systems include a data center having a water cooling subsystem configured to receive cool water and output warm water and a desalination plant co-located with the data center and configured to receive and desalinate the warm water. Aspects of the invention also include methods for cooling a data center using a water cooling subsystem and desalinating water with a desalination plant that is co-located with the data center.
    Type: Application
    Filed: June 5, 2013
    Publication date: May 28, 2015
    Inventor: Brent Richard Constantz
  • 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
  • Publication number: 20150136699
    Abstract: Equipment, systems, processes and techniques for conducting processing of solutions are described. The techniques can be applied to provide diluted solution (i.e. purified solvent), concentrate solution or each. A variety of specific equipment, example systems and processes are depicted and described.
    Type: Application
    Filed: September 22, 2014
    Publication date: May 21, 2015
    Inventor: CALVIN WOHLERT
  • Publication number: 20150122735
    Abstract: The present invention relates to a material. In particular, it relates to a membrane for filtering water. More particularly, it relates to a membrane comprising carbon nanotubes and mixed cellulose ester porous membranes for water desalination and purification. Still more particular, the membrane comprising a fibrous substrate and carbon nanotubes formed on a fibrous substrate, wherein the surface of the carbon nanotubes is functionally modified. A microfluidic device comprising such a membrane and a method for filtering water are also disclosed.
    Type: Application
    Filed: May 20, 2013
    Publication date: May 7, 2015
    Inventors: Hui Ying Yang, Rohit Karnik
  • Patent number: 9023210
    Abstract: An osmotic power generation system and method for generating osmotic power includes a membrane chamber having a semi-permeable membrane therein defining a first portion and a second portion therein. The system also includes a first pump communicating a first fluid to the first portion and a second pump communicating a second fluid to the second portion. The second fluid has higher total dissolved solids than the first fluid. A second portion energy recovery device is in fluid communication with the second portion. A power generator is in communication with the second portion energy recovery device generating electrical power in response to the second portion energy recovery device and the pressure in the second portion.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: May 5, 2015
    Assignee: Fluid Equipment Development Company, LLC
    Inventor: Eli Oklejas, Jr.
  • Publication number: 20150114819
    Abstract: Methods and a system for removing carbon nanotubes from a water stream are provided herein. The system includes a purification vessel, wherein the purification vessel is configured to form a carbon oxide from the carbon nanotubes within the water stream.
    Type: Application
    Filed: April 10, 2013
    Publication date: April 30, 2015
    Inventors: Robert D. Denton, Dallas B. Noyes, Russell J. Koveal, Jr., Terry A. Ring
  • Publication number: 20150096937
    Abstract: A portable water purification system is disclosed. The system can have a water storage receptacle, a reverse osmosis filter, a pump, and a solar panels array group. The reverse osmosis filter can be configurable to convert source water into drinkable water, and the pump can be configurable to provide the source water from a water source to the reverse osmosis filter. The array group can have at least one bi-fold solar panel array, and the array group can be configurable to provide power for the pump. The water storage receptacle can be configurable to contain the drinkable water in one configuration and configurable to contain at least one component of the purification system for storage in another configuration.
    Type: Application
    Filed: October 9, 2013
    Publication date: April 9, 2015
    Inventor: Kevin E. Munro
  • Patent number: 8999162
    Abstract: Water treatment systems and methods are provided to minimize membrane fouling and the required maintenance that results therefrom. A water treatment system includes a pressure vessel with a plurality of spaced-apart membranes disposed therein, and an impeller or other means for circulating feed water through the interior of the vessel and past the membranes. Antifouling particles (such as diatomaceous earth or activated carbon) and/or pellets can be added to the feed water inhibit membrane fouling and extend the useful life of the membranes.
    Type: Grant
    Filed: March 14, 2014
    Date of Patent: April 7, 2015
    Assignee: Econopure Water Systems, LLC
    Inventors: Diem Xuan Vuong, Michael Sean Motherway, Curtis Roth
  • Publication number: 20150083666
    Abstract: Described are water-on-water valves for use in reverse osmosis filtration systems. The water-on-water valves are regulated by the pressure in a product line, which contains fluid from a product line of the filter module and/or the product side of a water-on-water storage tank. Exemplary valves are shuttle valves that are regulated by the pressure downstream of the product side of a reverse osmosis filter module. The valves may comprise a piston within a housing, and an end of the piston may have an enlarged diameter relative to the maximum diameter of the remainder of the piston. The body of the piston may have sections of differing diameters, where the smaller diameter sections form flow channels, or the body may a diameter that is substantially the same along its length in conjunction with gratings and flow channels.
    Type: Application
    Filed: September 26, 2013
    Publication date: March 26, 2015
    Inventors: Laurence W. Bassett, Dian Zheng, David A. Carbo