Patents Assigned to Veolia Water Solutions & Technologies Support
  • Publication number: 20190100452
    Abstract: The invention pertains to a method (200, 300, 400) of at least partly removing at least one micropollutant from wastewater (104) comprising carbogenous compounds and at least one micropollutant.
    Type: Application
    Filed: March 7, 2017
    Publication date: April 4, 2019
    Applicant: VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORT
    Inventors: Magnus CHRISTENSSON, Thomas WELANDER
  • Patent number: 10246360
    Abstract: Method and plant to implement the continuous thermal hydrolysis of sludge to be treated containing organic matter, the method comprising at least: a. a step for de-structuring said sludge to be treated producing de-structured sludge; b. a step for the thermal hydrolysis of said de-structured sludge within a thermal hydrolysis reactor producing hydrolyzed sludge; c. a step for cooling said hydrolyzed sludge; said step for de-structuring consisting in: introducing said sludge to be treated into a dynamic mixer; heating said sludge coming from said dynamic mixer, this heating being obtained by the introduction, into a heat exchanger, on the one hand of said sludge coming from said dynamic mixer and, on the other hand, of said hydrolyzed sludge, this introduction inducing said cooling.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: April 2, 2019
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Cedric Crampon, Julien Chauzy, Malik Djafer
  • Patent number: 10188971
    Abstract: A rotary disc filter device includes a rotary drum and one or more disc-shaped filter members secured about the drum. Each disc-shaped filter member includes a filter and a filter support comprising a series of modules. The modules each include a base that is secured to the rotary drum and a support arm projecting outwardly from the base. The modules are interconnected and disposed around the rotary drum.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: January 29, 2019
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Åke Danielsson, Åke Ralvert, Emil Svensson, Per Larsson
  • Patent number: 10160683
    Abstract: A ballasted flocculation system that chemically softens water and causes hardness particles to precipitate from the water and crystallize. In the course of crystallizing, the hardness particles grow and form ballasted floc that are separated from the water in the form of sludge by a clarification unit, producing a clarified effluent. The separated sludge including the hardness crystals is directed to a separator where the sludge is separated into two streams with each stream having hardness crystals contained therein. In one process design, one stream includes relatively small hardness crystals and the other stream includes relatively large hardness crystals. The stream having the relatively small hardness crystals is directed to a first reactor and mixed with the incoming water and a softening reagent. The stream having the relatively large crystals is directed to a second downstream reactor and mixed with water and a flocculant which facilitates the growth of the hardness crystals.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: December 25, 2018
    Assignee: Veolia Water Solutions & Technologies Support
    Inventor: Charles Blumenschein
  • Publication number: 20180319690
    Abstract: A method or process for treating wastewater containing high organics, silica, boron, hardness, and suspended and dissolved solids. The method includes degasifying the wastewater for the removal of dissolved gases and thereafter chemically softening the wastewater. After the chemical softening step, the wastewater is directed through a media filter or membrane which removes additional solids and precipitants. Thereafter the wastewater is directed through a sodium ion exchange that further softens the wastewater. The effluent from the ion exchange is directed through a cartridge filter and the effluent from the cartridge filter is directed through one or more reverse osmosis units. At a selected phase of the process, prior to the wastewater reaching the reverse osmosis unit or units, the pH of the wastewater is raised and maintained such that the pH of the wastewater reaching a reverse osmosis unit is at a pH greater than 10.5.
    Type: Application
    Filed: July 11, 2018
    Publication date: November 8, 2018
    Applicant: Veolia Water Solutions & Technologies Support
    Inventors: LNSP Nagghappan, John A. Korpiel
  • Patent number: 10118850
    Abstract: In order to treat a flow of waste water, there is applied to this flow, after at most an optional pre-treatment of screening/degritting or deoiling, a filtration treatment by means of microfiltration or ultrafiltration membranes, by causing the flow to circulate tangentially to the membranes at a velocity of at least 0.1 m/s, in the presence of an organic sequestering agent composed based on organic phosphate at a concentration that is effective for sequestering metal ions contained in the flow and minimizing the formation of calcium carbonate, with a differential pressure on either side of the membranes that is less than or equal to 5 bar.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: November 6, 2018
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Abdelkader Gaid, Catherine Daines-Martinez, Sebastien Logette, Christophe Amiel
  • Patent number: 10040709
    Abstract: A method for removing sulfate from a wastewater stream includes mixing gibbsite and a calcium source to precipitate Ettringite from the wastewater stream and produce an effluent with a reduced sulfate concentration. The gibbsite in the precipitated Ettringite is regenerated by mixing an acid with the Ettringite and precipitating gibbsite particles, after which the gibbsite particles are subjected to a crystallization process to increase the size of the gibbsite particles which are recycled back to the main stream.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: August 7, 2018
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Kashi Banerjee, Charles D. Blumenschein, John Charles Schrader, Robert G. Cook
  • Publication number: 20180201517
    Abstract: The present process relates to thermally hydrolyzing sludge in a thermal hydrolysis system. A flash tank or waste heat boiler is located downstream of the thermal hydrolysis system. Hydrolyzed sludge is continuously directed into the flash tank or waste heat boiler for recovering supplemental steam. The supplemental steam is used independently or in combination with live steam produced by a main boiler to heat sludge being directed into the thermal hydrolysis system.
    Type: Application
    Filed: July 21, 2016
    Publication date: July 19, 2018
    Applicant: Veolia Water Solutions & Technologies Support
    Inventors: Richard W. DiMassimo, Soren J. Hojsgaard, Jens Christian Bisgaard
  • Patent number: 10023487
    Abstract: A method or process for treating wastewater containing high organics, silica, boron, hardness, and suspended and dissolved solids. The method includes degasifying the wastewater for the removal of dissolved gases and thereafter chemically softening the wastewater. After the chemical softening step, the wastewater is directed through a media filter or membrane which removes additional solids and precipitants. Thereafter the wastewater is directed through a sodium ion exchange that further softens the wastewater. The effluent from the ion exchange is directed through a cartridge filter and the effluent from the cartridge filter is directed through one or more reverse osmosis units. At a selected phase of the process, prior to the wastewater reaching the reverse osmosis unit or units, the pH of the wastewater is raised and maintained such that the pH of the wastewater reaching a reverse osmosis unit is at a pH greater than 10.5.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: July 17, 2018
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: LNSP Nagghappan, John A. Korpiel
  • Publication number: 20180178147
    Abstract: The invention relates to a filter panel (1) for a drum filter (2) which is used for filtering off solid particles from a liquid. The filter panel (1) comprises a first side (3) being adapted to be attached to a drum (4) of said drum filter (2), a second side (5) being adapted to receive a filter cloth (6), and a plurality of through holes (7) extending from said first side (3) to said second side (5), each hole (7) defining one or more side walls (8). The filter panel (1) is characterized in that at least one of said holes (7) comprises an inclined side wall (8). The invention also relates to a drum filter (2) for filtering liquid.
    Type: Application
    Filed: June 21, 2016
    Publication date: June 28, 2018
    Applicant: Veolia Water Solutions & Technologies Support
    Inventors: Filip THYSELL, Emil SVENSSON, Kjell-Ake SVENSSON, Per LARSSON
  • Patent number: 10005213
    Abstract: A disc filter disposed around a drum for filtering water. The disc filter includes a frame structure and a plurality of filter segments arranged around the drum and secured to the support. Each filter segment includes a filter frame having first and second portions and filter material integrated with the first and second portions of the filter frame through an injection moulding process.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: June 26, 2018
    Assignee: Veolia Water Solutions & Technologies Support
    Inventor: Ake Ralvert
  • Patent number: 9962635
    Abstract: A rotary disc filter is provided with an integrated backwash and chemical cleaning system. In one mode of operation, backwash is directed through a control valve to one or more nozzles for spraying the backwash onto the filter media forming a part of a rotary disc filter. In a second mode, a chemical cleaning mode, the pump directs backwash through an eductor that induces a chemical into the inductor which is mixed with the backwash to form a backwash-chemical mixture that is sprayed onto the filter media. A control system is used in conjunction with the backwash and cleaning systems to monitor process information and/or filter media properties and to determine when to perform backwashes and regenerative cleanings in order to optimize the performance of the filter system.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: May 8, 2018
    Assignee: VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORT
    Inventors: Mark H. Stewart, Luke Wood, Todd Casey, Ronald V. Palumbo, Rune Strube
  • Patent number: 9957182
    Abstract: Method for treating water, containing organic matter characterized in that it comprises a step of adsorption of the organic matter contained in said water, in which this water is put into contact with an amagnetic ion-exchanging resin in an infinitely stirred tank (1); the filtering of the mixture of water and resin within the tank (1) and the discharging of filtered water from this tank, the filtering being implemented through at least one screen (4) provided within the tank (1) enabling the resin to be contained in the infinitely stirred tank; the periodic cleansing of the screen (4) consisting of the separation, from this screen, of the saturated resin that has collected thereon; the drawing off (18) of saturated resin from the tank (1); the regenerating (6) of at least a part of the saturated resin thus drawn off; the recycling (7) of said resin thus regenerated in the tank (1); a step of ballasted coagulation/flocculation (12, 13) and separation (14) comprising the addition of coagulant reagent (12b), fl
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: May 1, 2018
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Philippe Sauvignet, Abdelkader Gaid
  • Patent number: 9938159
    Abstract: A device is provided for cleaning a filter cloth that forms a part of a filter element in a rotary disc filter. The device includes a flush tube and a spray nozzle operatively connected to the flush tube for receiving a cleaning fluid from the flush tube and directing the cleaning fluid onto the filter cloth.
    Type: Grant
    Filed: October 7, 2011
    Date of Patent: April 10, 2018
    Assignee: Veolia Water Solutions & Technologies Support
    Inventor: Per Larsson
  • Patent number: 9889391
    Abstract: A degasser includes a vessel having a series of chambers. Liquid containing a gas is directed through the vessel and the chambers therein. A stripping gas is injected into the vessel and moves through the vessel in a counter-current direction relative to the flow of liquid. More particularly, the stripping gas moves from one chamber to another chamber in an upstream direction (relative to the flow of the liquid) and is mixed with the liquid in each chamber, causing gas in the liquid to be displaced. Displaced gas is vented from the vessel at a location near where the liquid enters the vessel.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: February 13, 2018
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Aaron Poon, David Salyer, Oscar Velastegui
  • Patent number: 9890052
    Abstract: A process is disclosed for recovering cyanide used to leach gold or silver from ore. In the course of leaching gold or silver from ore, a barren solution is generated. A portion of the barren solution containing sodium cyanide is recycled to the cyanidation process while blowdown from the barren solution is subjected to pre-treatment, UV photodissociation and pH adjustment. Ultimately, a volatile hydrocyanic acid is formed and is absorbed into a sodium hydroxide solution through the employment of a gas-filled membrane. This forms sodium cyanide that can be recycled and used in the cyanidation process to leach gold or silver from ore.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: February 13, 2018
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Kashi Banerjee, Herve Buisson
  • Publication number: 20170349470
    Abstract: Method for dewatering sludge assisted by flocculating reagent, said method comprising an injection of flocculating reagent into the sludge and a step for dewatering said sludge, characterized in that it comprises a preliminary step for mixing (4) said sludge so as to destructure it and reduce its viscosity. Installation for implementing this method.
    Type: Application
    Filed: December 18, 2015
    Publication date: December 7, 2017
    Applicant: Veolia Water Solutions & Technologies Support
    Inventors: Cedric CRAMPON, Malik DJAFER, Eric GUIBELIN
  • Publication number: 20170349453
    Abstract: The present invention concerns a nozzle for injecting pressurized water containing a dissolved gas, said nozzle comprising: a cylindrical intake chamber (20) for said water; a cylindrical expansion chamber (30) comprising a part (301) communicating with said intake chamber (20) by an orifice (401) and an outlet; a diffusion chamber (60) of truncated conical section communicating with the outlet of said expansion chamber (30) and widening out from said expansion chamber; said nozzle comprising means for putting the stream of water that flows out of said expansion chamber (30) into rotation.
    Type: Application
    Filed: December 23, 2015
    Publication date: December 7, 2017
    Applicant: Veolia Water Solutions & Technologies Support
    Inventors: Thomas THOUVENOT, Nathalie VIGNERON-LAROSA, Nicolas ROUX
  • Patent number: 9828262
    Abstract: A method of removing barium, calcium, strontium, and magnesium from frac flowback. A sulfate reagent and carbonate reagent are mixed with the frac flowback, causing barium, calcium, strontium, and magnesium to precipitate. The precipitants are crystallized and the resulting frac flowback and crystals are separated into relatively heavy solids and a stream of relatively light solids. The stream of relatively light solids is subjected to a further separation process that produces sludge that is recycled to aid in the crystallization process and a treated effluent which is recycled to the fracking operation or collected and used in another fracking operation.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: November 28, 2017
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Charles D. Blumenschein, Mark W. Hess, Kashi Banerjee
  • Publication number: 20170327387
    Abstract: Method and installation of thermal hydrolysis of sludges implementing a group of thermal hydrolysis reactors (71,72,73,74) characterized in that it comprises successions of cycles, each of these successions of cycles being dedicated to one of said thermal hydrolysis reactors, each cycle comprising: a step a) for conveying a batch of non-preheated sludges to be treated into a thermal hydrolysis reactor (71,72,73,74), said step for conveying comprising the continuous passage of the sludges of said batch of sludges into a dynamic mixer (3) into which recovery steam is injected; a step b) for injecting live steam into said thermal hydrolysis reactor (71,72,73,74) containing said batch of sludges so as to increase the temperature and the pressure prevailing in this reactor; a step c) of thermal hydrolysis of the batch of sludges in the thermal hydrolysis reactor; a step d) for emptying the content of the batch of hydrolyzed sludges of said thermal hydrolysis reactor towards a recovery vessel (13), and for concomit
    Type: Application
    Filed: October 30, 2015
    Publication date: November 16, 2017
    Applicant: Veolia Water Solutions & Technologies Support
    Inventors: Julien CHAUZY, Malik DJAFER, Cedric CRAMPON