Of Separated Solids Patents (Class 210/713)
  • Patent number: 9994463
    Abstract: An electrocoagulation system including a dosing unit, a mixing unit and a buffer tank is provided. The dosing unit receives a fluid from an external source and injects an electrochemically generated coagulant into the fluid using one or more pairs of electrodes. The mixing unit mixes the coagulant with the fluid and is separate from the dosing unit. The buffer tank holds the fluid until particles contained in the fluid grow to a predetermined size.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: June 12, 2018
    Assignee: PALO ALTO RESEARCH CENTER INCORPORATED
    Inventors: Armin R. Volkel, Meng H. Lean, Kai Melde
  • Patent number: 9352250
    Abstract: The present invention provides a sludge scraping apparatus which includes a piston attached to a traction core member, a body formed of a driving cylinder provided with front and rear sealing connection parts, a sludge scraper attached to the body, position switching means that switches the sludge scraper to a scraping position at advancement of the body and switches the sludge scraper to a non-scraping position at retreat of the body, and a treatment part attached in front of the driving cylinder and has a treatment chamber therein, the extending part of the traction core member passing through the treatment chamber, and the body can be moved along the traction core member in an advancing and retreating direction by injection/discharge of water into/from the driving cylinder by fluid control means, and at movement of the body, injection/discharge of water into/from the treatment chamber is performed.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: May 31, 2016
    Assignee: FUJIWARA INDUSTRY CO., LTD.
    Inventor: Michihiro Fujiwara
  • Publication number: 20150068982
    Abstract: A water treatment method and a water treatment system that are capable of treating water containing salts to allow recovery of treated water at a high ion removal rate and a high water recovery rate, and allow recovery of high quality gypsum are provided. In the water treatment system, the water to be treated containing Ca2+ and SO42? is separated into concentrated water in which Ca2+ and SO42? are concentrated and treated water containing CO2 in a first demineralizer so that the treated water is recovered. The concentrated water in the first demineralizer is adjusted to a pH at which calcium carbonate can be dissolved and the scale inhibition function of a scale inhibitor is reduced, and then is delivered to a crystallizing tank. In the crystallizing tank, gypsum is crystallized from the concentrated water in the first demineralizer. The gypsum is separated and recovered in a separating section.
    Type: Application
    Filed: April 25, 2013
    Publication date: March 12, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Ryuji Yoshiyama, Susumu Okino, Jun Satou, Hideaki Sakurai, Hideo Suzuki, Hiroshi Nakashoji, Shigeru Yoshioka, Nobuyuki Ukai, Masayuki Eda
  • Patent number: 8969426
    Abstract: The present invention relates to the recovery of nylon from co-mingled materials (e.g., carpet) with reduced or eliminated ash (e.g., calcium carbonate) contamination.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: March 3, 2015
    Assignee: Dynasep Inc.
    Inventors: Brian J. Waibel, David J. Lawrence
  • Patent number: 8968572
    Abstract: In a device and a process for purifying water which is contaminated with sulphate ions and heavy metal ions, the water is collected in a water reservoir and a substance having basic activity in water is fed to the water reservoir in such a manner that a precipitant having heavy metal ions is precipitated from the water, wherein at least a subquantity of water is taken off from the water reservoir and is separated into pure water which is substantially freed from sulphate ions and heavy metal ions and dirty water which is enriched with sulphate ions and heavy metal ions. The dirty water is at least in part recirculated to the water reservoir, as a result of which a concentration of sulphate ions in the water reservoir is achieved such that a precipitant having sulphate ions is precipitated from the water.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: March 3, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventor: Michael Riebensahm
  • Patent number: 8845894
    Abstract: A flocculation-magnetic separation is provided which reduces the usage amount of flocculation agents as well as the usage amount of magnetic powders and realizes an improvement in the quality of treated water.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: September 30, 2014
    Assignees: Japan Oil, Gas and Metals National Corporation, Hitachi, Ltd
    Inventors: Hisashi Isogami, Satoshi Miyabayashi, Akira Mochizuki
  • Publication number: 20140263080
    Abstract: The invention is directed towards methods and compositions for improving the processing of mineral tailings. The method involves diverting a side stream from the main line of a tailings process flow. Into this side stream an additive such as a neat polymer without dilution is added and mixed and is then returned into the main line. By doing this only a portion of the overall tailings flow needs to undergo mixing yet the additive effectively treats the tailings. Even better the process avoids the need to add water to first invert and dilute the polymer additive. As a result tailings can be processed without incurring unnecessary mixing costs and unnecessary water addition.
    Type: Application
    Filed: March 13, 2013
    Publication date: September 18, 2014
    Inventor: Carl N. Urbani
  • Publication number: 20140231359
    Abstract: A method for treating phosphate-containing wastewater, such as phosphogypsum pond water. The method includes the steps of: (a) adding a first cation to the wastewater to precipitate fluorosilicate from the wastewater; (b) adding a second cation to the wastewater to precipitate fluoride from the wastewater; (c) raising the pH of the wastewater to precipitate the second cation from the wastewater; (d) removing residual silica from the wastewater; and (e) precipitating phosphate from the wastewater. The precipitated fluorosilicate may be sodium fluorosilicate. The precipitated phosphate may be struvite.
    Type: Application
    Filed: September 21, 2012
    Publication date: August 21, 2014
    Inventors: Pierre Cote, Ahren Britton, Ram Prasad Melahalli Sathyanarayana, Rhonda Maria Hyslop, Donald Robert Clark
  • Publication number: 20140144843
    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: Application
    Filed: November 22, 2013
    Publication date: May 29, 2014
    Applicant: Veolia Water Solutions & Technologies Support
    Inventors: Kashi Banerjee, Charles D. Blumenschein, John Charles Schrader, Robert G. Cook
  • Patent number: 8663478
    Abstract: The invention relates to a method for treating water charged with colloidal impurities, either dissolved or suspended, in a treatment plant, wherein said method comprises: the step of contacting said water, in an advanced oxidation area, with hydrogen peroxide in the presence of at least one transition-metal salt; a flocculation step that comprises contacting said water, in a flocculation area, with at least one flocculation additive and with at least one ballast comprising at least one non-soluble granular material denser than water and used as a biomass carrier; the step of feeding the water and floc mixture thus obtained into a settling area; the step of separating the treated water at the upper portion of said settling area from a mixture of sludge and ballast resulting from the settling of said flocs; the step of extracting the sludge and ballast mixture at the lower portion of said settling area; and the step of recycling at least a portion of the sludge into said advanced oxidation area.
    Type: Grant
    Filed: November 27, 2008
    Date of Patent: March 4, 2014
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Marielle Coste, Arnaud Bucaille, Sebastien Logette
  • Patent number: 8641907
    Abstract: A method of recovering polyhydroxyalkanoates (PHAs) from municipal waste sludge includes: (a) removing coarse particles in the municipal waste sludge and measuring a solid content in the municipal waste sludge in terms of a volatile suspended solid in the municipal waste sludge; (b) removing a supernatant from the municipal waste sludge; (c) freezing the municipal waste sludge; (d) adding a controlled amount of sodium hypochlorite solution to the municipal waste sludge that has been frozen, a ratio of the solid content of the municipal waste sludge to a volume of the sodium hypochlorite solution added in step (d) ranging from 0.67 mg/ml to 4 mg/ml and being defined as a liquid-solid ratio; and (e) separating PHAs from non-PHAs substances in the municipal waste sludge obtained in the step (d).
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: February 4, 2014
    Assignee: National Chi Nan University
    Inventors: Yung-Pin Tsai, Meng-Shan Lu, Chih-Chi Yang, Shou-Te Chen
  • Patent number: 8617400
    Abstract: A method for treating wastewater using a ballasted flocculation technique includes continuously measuring the concentration of suspended solids, organic matter or other impurities in the water to be treated prior to directing the water to be treated to a flocculation tank. Based on this measurement, the amount of ballast necessary to obtain treated water of a predetermined quality is then calculated. In the flocculation tank, ballast and a flocculating reagent are added to the water to form a water-floc mixture. The water-floc mixture is directed to a settling tank where a sludge-ballast mixture is settled. The sludge-ballast mixture is directed to a mixing tank and then to a separator to separate the ballast from the sludge. The separated ballast is directed to the flocculation tank. The separated sludge is directed to the mixing tank when the level of sludge-ballast mixture in the mixing tank is lower than a predetermined level.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: December 31, 2013
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Philippe Sauvignet, Claus Dahl, Valey Ursel, Celine Levecq, Jean-Francois Beaudet
  • Publication number: 20130313201
    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: Application
    Filed: May 23, 2013
    Publication date: November 28, 2013
    Applicant: Veolia Water Solutions & Technologies Support
    Inventor: Charles D. Blumenschein
  • Patent number: 8557123
    Abstract: Disclosed herein are systems for removing particulate matter from a fluid, comprising a particle functionalized by attachment of at least one activating group or amine functional group, wherein the modified particle complexes with the particulate matter within the fluid to form a removable complex therein. The particulate matter has preferably been contacted, complexed or reacted with a tethering agent. The system is particularly advantageous to removing particulate matter from a tailing solution.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: October 15, 2013
    Assignee: Soane Energy, LLC
    Inventors: Michael C. Berg, John H. Dise, Robert P. Mahoney, Kevin T. Petersen, David S. Soane, Kristoffer K. Stokes, William Ware, Jr., Atul C. Thakrar
  • Publication number: 20130248455
    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: Application
    Filed: March 14, 2013
    Publication date: September 26, 2013
    Inventors: Charles D. Blumenschein, Mark W. Hess, Kashi Banerjee
  • Patent number: 8523965
    Abstract: Methods, systems and devices for treating and remediating or abating carbon containing wastes to produce clean water, non-toxic, non-hazardous ash has been taught and described, the method, systems and devices are particularly suited to treating aqueous hydrocarbon containing waste streams generated in the oil and gas drilling and hydrofracking industry including electrocoagulating which removes flocculent, the flocculent is removed and then the aqueous stream is separated into light fractions and heavy fractions. The heavy fraction and flocculent are recombined and then gasified to produce syngas and ash, the syngas can then be used in generating power.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: September 3, 2013
    Assignee: Doulos Technologies LLC
    Inventors: Coyte R Jones, Robert C Jones
  • Patent number: 8501011
    Abstract: A system and method for the treatment of process streams. A catalyst mediates a wet oxidation process at elevated temperatures and pressures for treating at least one undesirable constituent in an aqueous mixture. The aqueous mixture may be contacted with a catalyst and an oxidizing agent at an elevated temperature and a superatmospheric pressure. At least a portion of the catalyst may be precipitated by a pH adjustment and recycled back to contact the aqueous mixture.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: August 6, 2013
    Assignee: Siemens Energy, Inc.
    Inventor: Chad L. Felch
  • Patent number: 8454831
    Abstract: A method for treating wastewater comprises biologically treating the wastewater in a fixed-biomass biological reactor and then treating the wastewater in a ballasted flocculation system. The ballasted flocculation system produces a clarified effluent and sludge containing inert granular material having biomass accumulated thereon and suspended solids. The inert granular material having biomass accumulated thereon is separated from the suspended solids and then cleaned with a cleaning solution. After separating the biomass from the cleaned inert granular material, the cleaned inert granular material is recycled for use in the ballasted flocculation system.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: June 4, 2013
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Phillippe Sauvignet, Kashi Banerjee, Charles D. Blumenschein
  • Patent number: 8241503
    Abstract: Disclosed is an economical process for the purification of water containing soluble and sparingly soluble inorganic compounds using single-stage or two-stage membrane processes that integrate membrane water purification with chemical precipitation softening and residual hardness and silica removal from the membrane concentrates using ion exchange resins and silica sequestering media, respectively.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: August 14, 2012
    Inventor: Riad Al-Samadi
  • Patent number: 8202426
    Abstract: A method of removing phosphonates from water includes directing the water into a first settling zone. The water is then directed to a membrane filtration zone and is filtered therein to produce a concentrate containing phosphonates. The concentrate containing phosphonates is then contacted with sludge such that at least some of the phosphonates in the concentrate are adsorbed onto the sludge. Flocculant is added to the sludge and the concentrate to form a floc-mixture which is directed to a second settling zone to form treated concentrate.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: June 19, 2012
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Catherine Daines-Martinez, Jean-Christophe Schrotter, Karine Drouet, Abdelkader Gaid
  • Patent number: 8147695
    Abstract: A process for removing phosphorus from wastewater wherein an iron or aluminum salt is added to the wastewater. The iron or aluminum salt results in the precipitation of certain iron or aluminum species that include phosphorus adsorption sites. These iron or phosphorus species are settled and become a part of sludge produced in the course of the wastewater treatment process. By recycling substantial portions of the sludge, the concentration of these iron or aluminum species in the wastewater is increased. This increased concentration results in the presence of large quantities of unused phosphorus adsorption sites that attract and adsorb phosphorus, resulting in phosphorus being removed from the wastewater.
    Type: Grant
    Filed: October 26, 2010
    Date of Patent: April 3, 2012
    Assignee: I. Kruger Inc.
    Inventors: Kashi Banerjee, Charles D. Blumenschein, John Charles Schrader
  • Patent number: 8137566
    Abstract: A method of treating tailings comprising a solids fraction and a hydrocarbon fraction is disclosed. A primary flow is supplied to a jet pump, the primary flow comprising water and less than 20% solids by mass. A secondary flow is supplied to a mixing chamber of the jet pump, the secondary flow comprising a slurry of water and tailings, the slurry comprising more solids by mass than the primary flow. The jet pump is operated using the primary flow such that the tailings are agitated to effect at least a partial phase separation of the hydrocarbon fraction from the tailings. The methods disclosed herein may also be applied to treat tailings ponds.
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: March 20, 2012
    Assignee: RJ Oil Sands Inc.
    Inventors: Wade Ralph Bozak, Michael A. Kessick, Roderick Michael Facey
  • Patent number: 8133394
    Abstract: Wastewater can be purified in a device, which includes a cup-shaped vessel, having a wastewater inlet tube for the water at a certain level and an outlet tube at a lower level than the inlet tube, and a horizontal distribution disc, which vertically divides the vessel, has at least one opening and is provided with a substantially vertical distribution tube for receiving the water from the inlet tube. Water above the distribution disc is pumped through a filter head with a filter. Filtered water is let out through the outlet tube, whereas unfiltered water is transferred back to the distribution tube. Flocculation agent is added to the unfiltered water before reaching the distribution tube.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: March 13, 2012
    Assignee: B G Consulting HB
    Inventor: Bert Gustafsson
  • Publication number: 20120006754
    Abstract: A method of recovering polyhydroxyalkanoates (PHAs) from municipal waste sludge includes: (a) measuring a solid content in the municipal waste sludge in terms of a volatile suspended solid in the municipal waste sludge; (b) removing supernatant from the municipal waste sludge; (c) freezing the municipal waste sludge; (d) conducting a pretreatment of the municipal waste sludge that has been frozen; (e) adding a surfactant into the pretreated sludge to obtain a slurry; (f) adding a controlled amount of sodium hypochlorite solution to the municipal waste sludge obtained in step (e), a ratio of a volume of the sodium hypochlorite solution to the solid content of the municipal waste sludge ranging from 0.67 mg/ml to 1.25 mg/ml and being defined as a liquid-solid ratio; and (g) separating PHAs from non-PHAs substances in the municipal waste sludge obtained in the step (f).
    Type: Application
    Filed: November 19, 2010
    Publication date: January 12, 2012
    Applicant: NATIONAL CHI NAN UNIVERSITY
    Inventors: Yung-Pin TSAI, Meng-Shan LU, Chih-Chi YANG, Shou-Te CHEN
  • Patent number: 8092688
    Abstract: A method for treating water in a ballasted flocculation system comprises directing water into a ballasted flocculation zone and adding ballast and a flocculation reagent to the water to form a water-floc mixture. The water-floc mixture is directed into a settling zone to form treated water and sludge containing ballast. The ballast is then directed to a recirculation line where the ballast is recirculated to the ballasted flocculation zone. The method further includes determining the ballast concentration and comparing the ballast concentration with a predetermined threshold value. The rate at which ballast is recirculated to the ballasted flocculation zone is adjusted based on the determined ballast concentration and the predetermined threshold value.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: January 10, 2012
    Assignee: OTV SA
    Inventors: Philippe Sauvignet, Jean-Francois Beaudet, Sonia Guillot, Valery Ursel
  • Patent number: 8062529
    Abstract: A method for treating water includes directing untreated water into a mixing zone in a water treatment system and mixing the untreated water with a flocculating agent and a ballast to form a ballast-floc mixture. Thereafter, the ballast-floc mixture is directed to a settling zone where the mixture settles to form sludge. Treated water is discharged from the settling zone and the sludge is directed to a separator. The method further includes separating at least a portion of the ballast from the sludge and directing the separated ballast from the separator to the mixing zone. Finally, the sludge is directed from the separator to a sludge treatment reactor where at least some of the remaining ballast settles from the sludge and substantially ballast-free sludge is discharged from the sludge treatment reactor.
    Type: Grant
    Filed: February 19, 2007
    Date of Patent: November 22, 2011
    Assignee: OTV SA
    Inventor: Philippe Sauvignet
  • Patent number: 8062530
    Abstract: A method for neutralizing brines that contain high levels of silica accompanied with a high pH. Brine is processed through a reactor in which the pH is lowered and the resultant silica precipitate is adsorbed onto a sacrificial crystal structure. The resultant stream is then processed through a solids removal zone wherein the solids are removed and recovered for reuse. The neutralized solids-free brine is then suitable for down-hole injection in the heavy oil industry or further treatment by common water treatment methods if further adjustment is required for other industries.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: November 22, 2011
    Assignee: Aquatech International Corporation
    Inventors: Richard M. Schoen, Chandrakant Tiwari
  • Patent number: 8017018
    Abstract: A phosphorus removal system is operable to remove phosphorus from an influent. The system includes a first section receiving the influent and discharging a first flow. A first coagulant inlet is positioned upstream of the first section and is in fluid communication with the influent to introduce a first coagulant selected to precipitate phosphorus. A second section receives the first flow and discharges a second flow, and a third section receives the second flow and discharges an effluent. A second coagulant inlet is positioned downstream of the first section and upstream of the third section to introduce a second coagulant selected to precipitate phosphorus.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: September 13, 2011
    Assignee: Siemens Industry, Inc.
    Inventors: Eric Allen Lawrence, Joseph E. Zuback
  • Patent number: 7981295
    Abstract: Disclosed is an economical process for the purification of water containing soluble and sparingly soluble inorganic compounds using single-stage or two-stage membrane processes that integrate membrane water purification with chemical precipitation softening and residual hardness and silica removal from the membrane concentrates using ion exchange resins and silica sequestering media, respectively. The purified water recovery is not adversely affected by design and/or operational deficiencies in the chemical precipitation softening system that may result in higher residual hardness and silica in the supernatant from the clarifier.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: July 19, 2011
    Inventor: Riad A. Al-Samadi
  • Patent number: 7828976
    Abstract: A process for removing phosphorus from wastewater wherein an iron or aluminum salt is added to the wastewater. The iron or aluminum salt results in the precipitation of certain iron or aluminum species that include phosphorus adsorption sites. These iron or phosphorus species are settled and become a part of sludge produced in the course of the wastewater treatment process. By recycling substantial portions of the sludge, the concentration of these iron or aluminum species in the wastewater is increased. This increased concentration results in the presence of large quantities of unused phosphorus adsorption sites that attract and adsorb phosphorus, resulting in phosphorus being removed from the wastewater.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: November 9, 2010
    Assignee: I. Kruger, Inc.
    Inventors: Kashi Banerjee, Charles D. Blumenschein, John Charles Schrader
  • Patent number: 7820053
    Abstract: A process for removing fine particles and particulates from water. The process includes mixing a magnetic ballast, flocculant and water to form magnetic floc, and agitating the magnetic floc in a flocculation zone. A portion of the magnetic floc is collected on a magnetic collector in the flocculation zone. Another portion of the magnetic floc is directed downstream to a setting zone where the magnetic floc is settled. The settled magnetic floc is returned upstream of the settling zone where the returned magnetic floc is recombined with other magnetic floc in the flocculation zone. Ultimately, all, or substantially all, of the magnetic floc is removed by one or more magnetic collectors disposed upstream of the settling zone.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: October 26, 2010
    Inventor: Steven L. Cort
  • Patent number: 7815804
    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: December 12, 2006
    Date of Patent: October 19, 2010
    Assignee: OTV SA S.A.
    Inventor: LNSP Nagghappan
  • Publication number: 20100258506
    Abstract: This invention is directed to decreasing the CO2 concentration. The invention makes use of fluids and apparatuses for diminishing CO2 concentrations of fluids.
    Type: Application
    Filed: August 21, 2007
    Publication date: October 14, 2010
    Inventors: Brian Berkowitz, Ishai Dror
  • Patent number: 7799232
    Abstract: A reducing water purification material having a reducing iron-based precipitate selected from green rust, iron ferrite, reducing iron hydroxide, and a mixture thereof. A wastewater treatment process having steps of adding a reducing iron compound to wastewater, leading the wastewater to which the reducing iron compound is added to a reaction tank and forming a precipitate, separating the formed precipitate by a solid-liquid separation to obtain a sludge, and alkalinizing all or a portion of the separated sludge to form an alkaline sludge followed by returning to the reaction tank, wherein in the precipitation step, the wastewater to which the reducing iron compound is added and the alkaline sludge are mixed and are allowed to react in a non-oxidizing atmosphere under alkaline condition to form a reducing iron compound precipitate as the precipitate, thereby incorporating contaminants in the precipitate to remove the contaminants from the wastewater.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: September 21, 2010
    Assignee: Mitsubishi Materials Corporation
    Inventors: Hiroshi Hayashi, Hitoshi Takeuchi, Hajime Negishi, Shigeyuki Tsuzaki, Yoshio Aikawa, Ayako Mimoto, Shintaro Nakaya
  • Patent number: 7794603
    Abstract: The present invention concerns a method for purification of contaminated water through hydrate formation and separation of hydrates from contaminated water enriched with contaminants, by supplying hydrate particles to the water during hydrate formation. The present invention also concerns a device for purification of water by using a method according to the invention, and water produced according to the invention. By using the process principles according to the present invention, all types of water can be purified for consumption or safe discharge, or desired resources can be recovered, and air can be purified if it first is bubbled through the water which then is purified by a method according to the invention.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: September 14, 2010
    Assignee: EcoWat AS
    Inventors: Tore Skjetne, Are Lund, Roar Larsen
  • Patent number: 7758758
    Abstract: A method for removing metals from metal-containing acidic mine wastewater uses a basic sludge produced by the method for treating the wastewater. The wastewater is mixed with a lime slurry and with the basic sludge. This mixture is allowed to separate into an aqueous effluent and an acidic sludge. The effluent is mixed with the lime slurry and with a composition containing an iron compound, to produce a mixture. This mixture is allowed to separate into an aqueous effluent and the basic sludge. Lignin derivatives, such as calcium lignosulfonate, may be included in the treatment mixture.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: July 20, 2010
    Assignee: Noram Engineering and Constructors Ltd.
    Inventors: J. Ming Zhuang, Anthony S. Walsh
  • Publication number: 20100126937
    Abstract: A system and method for the treatment of process streams. A catalyst mediates a wet oxidation process at elevated temperatures and pressures for treating at least one undesirable constituent in an aqueous mixture. The aqueous mixture may be contacted with a catalyst and an oxidizing agent at an elevated temperature and a superatmospheric pressure.
    Type: Application
    Filed: January 22, 2008
    Publication date: May 27, 2010
    Inventor: Chad L. Felch
  • Publication number: 20100102006
    Abstract: A process for water treatment, including a combination of methods from the group comprising coagulation, sedimentation, flocculation and ballast flocculation, which is further improved by the addition of a simplified sludge recirculation system. The recirculation system corresponding to this process allows higher sludge density as well as less significant water volume losses by making the sludge accumulating at the bottom of the sedimentation zone go through a hydro cyclone a certain number of times in repeated cycles thus augmenting the solid particles density of the extracted sludge. The system may also be controlled by a suspended solid analyser, a flow meter and/or a timer. The present invention also includes a method of producing specific fluid flow control behaviour with this simplified sludge recirculation system, which furthermore improves the efficiency of the process.
    Type: Application
    Filed: October 23, 2008
    Publication date: April 29, 2010
    Inventor: Luc Quevillon
  • Patent number: 7686960
    Abstract: A multi-stage process for removing dissolved contaminants and suspended solids from water employing a magnetic separation technique. The process includes two tanks and magnetic seed. In the first tank, water is clarified by magnetic technologies and in the second tank dissolved solutes are sorbed on magnetic seed.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: March 30, 2010
    Inventor: Steven L. Cort
  • Publication number: 20100072142
    Abstract: A system and method that uses mature floc as seed particles to promote aggregation in a water treatment process is provided. The seed particles do not need to be recovered as they separate out with the waste steam after a spiral separation. One implementation is to prepare the mature floc off-line and inject periodically into the buffer tank, as needed. Another implementation is to tap into the more mature floc downstream and feedback, as needed, to the buffer tank.
    Type: Application
    Filed: September 19, 2008
    Publication date: March 25, 2010
    Applicant: PALO ALTO RESEARCH CENTER INCORPORATED
    Inventors: Meng H. Lean, Armin R. Volkel, Ashutosh Kole, Jeonggi Seo
  • Patent number: 7641801
    Abstract: A method and system of removing or decreasing waste liquor manganese concentration to less than about 1 mg/L total manganese without the precipitation of significant amounts of magnesium. The method and system include steps for treating the waste liquor using three separate circuits in which in the first circuit, manganese is reduced, for example, from about 2 g/L to <500 mg/L using pH adjustment with a suitable neutralizing agent; and in the second circuit, the final target manganese level is achieved by oxidative precipitation using a suitable oxidizing agent. Part of the precipitated manganese product, e.g., MnO2, is recycled to the oxidative precipitation circuit as seed and the balance proceeds to a third circuit wherein the precipitated manganese product is re-dissolved, and then recycled to the first neutralization circuit. In the first neutralization circuit and the second oxidative precipitation circuit, the process conditions are selected to minimize the precipitation of magnesium, e.g., Mg(OH)2.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: January 5, 2010
    Assignee: Vale Inco Limited
    Inventors: Mohamed Buarzaiga, Eric Devuyst, Julian Edwards, Joe Paventi
  • Patent number: 7635434
    Abstract: Solid and liquid concrete waste is collected from a construction site and safely off-loaded at a treatment site. Solid waste is separated and sent to a crusher to be made into road bed aggregate. Liquid waste is put in a first tank to settle the solids, then moved to a second tank to settle remaining fine solids, and moved to a third tank coupled to a circulation pump with CO2 gas injection to lower the pH. The liquid in the third tank is then filtered before discharging for recycle, irrigation or dust control. A precipitate agent is preferable added to the liquid in the third tank to remove heavy metals and the precipitate is periodically backwashed from the filter into the first tank. The sludge created in the settling and filtering process is periodically dewatered in the first tank and mixed with the solid concrete waste sent to the crusher.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: December 22, 2009
    Assignee: Concrete Washout Systems, Inc.
    Inventors: Kevin Mickelson, Roger Engelsgaard
  • Patent number: 7625490
    Abstract: A nitrification-denitrification process using magnetic seeding and magnetic separation to treat water is provided. The process includes biologically converting ammonia to nitrates with a biofilm disposed on magnetic seed. Suspended solids are removed by mixing flocculant and magnetic seeds with the water and magnetically removing floc formed floc from the water.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: December 1, 2009
    Inventor: Steven L. Cort
  • Patent number: 7560031
    Abstract: A process for the treatment of phosphoric acid plant pond water facilitating the recovery of phosphorus values from the input pond water. In certain aspects the process recycles solids from a later stage neutralization and separation into the clarified liquid stream from an initial clarification and neutralization stage. A sufficient amount of solids are added to the clarified liquid stream to effect the pH-dependent precipitation of a phosphate product. In alternative aspects an intermediate pH-dependent precipitation of a phosphate product is achieved through the addition of a neutralizing agent. The phosphate product is further characterized by a low concentration of fluoride. In addition the phosphate product can be further processed to a high purity technical grade phosphoric acid. In certain aspects the process employs flocculating agents to enhance the formation of precipitates. In further aspects, methodologies taught herein facilitate the reduction of silica in the process streams.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: July 14, 2009
    Assignee: Dr. Phosphate, Inc.
    Inventors: Vaughn V. Astley, Dennis H. Michalski
  • Publication number: 20090045139
    Abstract: Solid and liquid concrete waste is collected from a construction site and safely off-loaded at a treatment site. Solid waste is separated and sent to a crusher to be made into road bed aggregate. Liquid waste is put in a first tank to settle the solids, then moved to a second tank to settle remaining fine solids, and moved to a third tank coupled to a circulation pump with CO2 gas injection to lower the pH. The liquid in the third tank is then filtered before discharging for recycle, irrigation or dust control. A precipitate agent is preferable added to the liquid in the third tank to remove heavy metals and the precipitate is periodically backwashed from the filter into the first tank. The sludge created in the settling and filtering process is periodically dewatered in the first tank and mixed with the solid concrete waste sent to the crusher.
    Type: Application
    Filed: May 13, 2008
    Publication date: February 19, 2009
    Applicant: CONCRETE WASHOUT SYSTEMS
    Inventors: Kevin Mickelson, Roger Engelsgaard
  • Patent number: 7491333
    Abstract: A process for the treatment of industrial waste water. The process includes the steps of admixing partially-treated waste water containing precipitated impurities with a flocculating agent in a flocculation basin, directing the admixed waste water to an elongated sedimentation basin, allowing flocculated solids in the waste water to settle to the bottom of the sedimentation basin, removing the settled solids from the bottom of the sedimentation basin and directing the treated water from the sedimentation basin. The process can further include the step of adjusting the pH of the waste water to precipitate impurities in the waste water prior to the addition of the flocculation agent. The elongated sedimentation basin can include a pair of sloped sides to consolidate the settled solids at the bottom of the basin. The settled solids can then be removed by suction. The basins can be formed from the excavation or impoundment of earth in an area adjacent to a waste water-generating facility.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: February 17, 2009
    Assignee: Cleanwater Technologies, LLC
    Inventors: Donald A. Luke, Vaughn V. Astley
  • Publication number: 20090014387
    Abstract: A system and method for treating wastewater includes a treatment container for receiving and treating wastewater and a mixing/aeration system disposed in the treatment container. Wastewater is pumped under pressure from the treatment container through a solids/liquid separation system, preferably comprising multiple parallel membrane bioreactors, to separate the solids and liquids in the wastewater. Liquid retentate from the solids/liquid separation system is cycled back to the treatment container via the mixing/aeration system. The closed-loop system and method for solids/liquid separation and aeration/mixing provides for reduced equipment requirements and energy usage during operation.
    Type: Application
    Filed: July 7, 2008
    Publication date: January 15, 2009
    Inventor: Thomas H. Probst
  • Patent number: 7442311
    Abstract: An emulsion and affluent process which treats and breaks very tight emulsions and separates dissolved solids from associated fluids produced in industry, whereby solids and fluids are separated into clean interfacial phases thus providing an improved quality saleable product resulting in significant reductions in base sediments and water, and compliance with international saleable product and environmental effluent standards with a specific focus on biological oxygen demand and chemical oxygen demand levels for treated fluids.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: October 28, 2008
    Assignee: Hydrocarb (Trinadad) Limited
    Inventor: Dolly Nicholas
  • Publication number: 20080237138
    Abstract: Hot water pipes, in areas with hard water, tend to fill with scale until they no longer pass enough water. De-scaling water pipes with acid is dangerous, expensive and damages the pipes. Ion exchange and reverse osmosis water softeners eliminate scale buildup in pipes, but are expensive. Embodiments of this invention provide a means of keeping an amount of the scale precipitate, created when water is heated, inside a housing by passing the hot water through a removal medium where the scale sticks to the surface. The removal medium can be placed inside the water heater or in a separate housing connected to the water heater; both configurations remove the precipitate from hot water; both save hot water pipes from scale accumulation.
    Type: Application
    Filed: June 12, 2008
    Publication date: October 2, 2008
    Inventor: Steven Clay Moore
  • Publication number: 20080216392
    Abstract: A method for producing a combustion product that involves dewatering raw paint sludge from spray paint booth operations and adding a de-sulfuring agent thereto. The resulting material can provide significant and economical fuel value and sulfur emissions control to combustion processes such as for power plants while also obviating the need to dispose of waste paint sludge in landfills. Additionally the process is inexpensive, safe and free of most problems associated with paint sludge drying.
    Type: Application
    Filed: March 5, 2007
    Publication date: September 11, 2008
    Inventors: Joe P. McCarty, Daniel M. St. Louis