For Recovery Of A Treating Agent Patents (Class 210/711)
  • Patent number: 10577248
    Abstract: Lake Kivu contains ˜50 million tonnes (MT) dissolved biomethane. Efficient use is problematic from massive associated CO2: ˜600 MT. Conventional extraction scrubs CO2 with ˜50% overall CH4 loss, and returns ˜80% CO2 into the deep lake, preserving a catastrophe hazard threatening >2 M people. Methods and systems are disclosed coupling: (1) efficient CH4+CO2 degassing; (2) optional oxyfuel power generation and CO2 power cycle technologies; and (3) CO2 capture, processing, storage and use in a utilization hub. The invention optimally allows power production with >2× improved efficiency plus cryo-energy storage and large-scale greentech industrialization.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: March 3, 2020
    Assignee: HARPER BIOTECH LLC
    Inventor: Charles L. Harper, Jr.
  • Patent number: 10464831
    Abstract: There is provided herein a system and method to effectively treat produced water. In some embodiments, produced water is treated by mixing produced water with an amine solvent and humic acid to form precipitates comprising magnesium, strontium, barium and radium hydroxides in a precipitator unit. Precipitates are then removed by a filter to produce de-scaled produced water. The amine solvent is recovered from the de-scaled produced water by a stripping unit.
    Type: Grant
    Filed: September 7, 2017
    Date of Patent: November 5, 2019
    Inventor: Mansour S. Bader
  • Patent number: 10131562
    Abstract: Methods and systems for treating water for potable use or consumption are described. In an embodiment, a method for treating water for potable may include adding an effective amount of a magnesium compound to supply water to be treated. The method may also include adding an effective amount of a flocculation aiding metal salt to the supply water. The method may further include removing one or more contaminants from the supply water to provide treated water. Other methods and systems are described.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: November 20, 2018
    Assignee: Premier Magnesia, LLC
    Inventors: Matthew P. Madolora, J. Peter Ahl
  • 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
  • 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
  • Patent number: 9637403
    Abstract: The present invention relates to the treatment of sludge and, more particularly, to a method for recovering phosphate as a substantially solid component from a phosphate-containing sludge. Some embodiments of the invention relate to a method for recovering phosphate as a substantially solid component and aluminum as a liquid component from a phosphate-containing and aluminum-containing sludge. The method incorporates wet oxidation to decompose the organic components of the sludge to provide a residual sludge. The residual sludge comprises the insoluble components and, in some embodiments wherein the sludge comprises aluminum, the residual sludge further comprises suspended and/or soluble aluminum.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: May 2, 2017
    Assignee: Wetox Limited
    Inventors: Kevin Joseph McKay, Thomas Borrmann
  • Patent number: 9539445
    Abstract: The invention provides an anion-containing calcium phosphate compound, composition and dental patch comprising the same and their use in remineralizing teeth. The anion-containing calcium phosphate compound has the following formula: (Ca+2)x(anion?a)y(PO4?3)z wherein 2x=(a*y+3z); a is an integer of 1 to 3; and each of x, y and z is not 0.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: January 10, 2017
    Assignee: TAIPEI MEDICAL UNIVERSITY
    Inventors: Jen-Chang Yang, Nai-Chia Teng, Chien-Chung Chen, Sheng-Yang Lee, Chen-Feng Ma, Dian-Yu Ji
  • Patent number: 9238585
    Abstract: A process for removal of non-polar compounds from water, wherein the non-polar compounds exist in dissolved or dispersed form, wherein the water is led through a preparation tank wherein the temperature is adjusted and wherein possible solid particles are removed. The water is then led via pipe into a reactor tank and is mixed with a hydrate forming compound, wherein simultaneously hydrate seeds are added which have been recycled for continuous use in the process; whereby the drops or molecules of the non-polar compounds are attached or associated to hydrate particles being formed in the reactor tank. The hydrate particles are separated from the water and melted. The hydrate forming compound is recycled to the reactor tank and the non-polar compounds discharged. In addition, a device for use of the process as well as hydrates for removal of non-polar compounds in water.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: January 19, 2016
    Assignee: SINVENT AS
    Inventors: Tore Skjetne, Roar Larsen, Are Lund
  • Patent number: 9091024
    Abstract: Methods to preserve starch present in pulp are provided and also methods to control calcium precipitation and/or scaling in digesters or BOD systems. The methods can be performed as part of a papermaking process. Process water containing pulp can be treated with a chloramine. Process water containing pulp with native starch can receive a double treatment with at least one biocide, such as chloramine, and at least one oxidant, such as sodium hypochlorite. The treatment can be performed in any suitable manner. The treatment can be performed at one or more stages or locations in a papermaking system. A target residual chloramine value or range can be achieved by the treatment. Packaging sheets/boards and other paper products manufactured using the methods provided exhibit superior strength and other desirable characteristics.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: July 28, 2015
    Assignee: Buckman Laboratories International, Inc.
    Inventor: Eddie Van Haute
  • Patent number: 9085477
    Abstract: A method of reducing a sulfate concentration in wastewater comprises directing the wastewater stream to a precipitation reactor and mixing the wastewater stream with a calcium source and a calcium salt seed material to precipitate calcium sulfate. The precipitated calcium sulfate is then separated from a treated effluent and directed to a settling tank where the precipitated calcium sulfate is separated into heavier calcium sulfate precipitants and lighter calcium sulfate precipitants. The heavier calcium sulfate precipitants and the lighter calcium sulfate precipitants are separately recirculated to the precipitation reactor. A predetermined mass ratio of solids is maintained in the precipitation reactor.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: July 21, 2015
    Assignee: Veolia Water Solutions & Technologies Support
    Inventors: Kashi Banerjee, Charles D. Blumenschein, Robert G. Cook, John C. Schrader
  • Patent number: 9061221
    Abstract: A process for recovering reusable materials, in particular phosphate, from sewage sludge products, namely sewage sludge, sewage sludge ash or sewage sludge slag, by extraction, in which a suspension of the sewage sludge product is produced in water, alcohol, water-alcohol mixture or an aqueous solution, gaseous carbon dioxide (CO2) or supercritical carbon dioxide (scCO2) is introduced as an extraction agent into the suspension of the sewage sludge product, undissolved solids are separated from the liquid suspension agent, carbon dioxide is removed from the suspension agent, and reusable materials dissolved in the suspension agent are precipitated and separated from the suspension agent.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: June 23, 2015
    Assignee: CHEMISCHE FABRIK BUDENHEIM KG
    Inventors: Rüdiger Wissemborski, Rainer Schnee, Rainer Wallwitz, David Kümmet
  • 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
  • Publication number: 20140158632
    Abstract: Described herein are methods of separating a first soluble salt from water that contains the first soluble salt and a second soluble salt, by (a) adding a composition to a water product containing a first soluble salt and a second soluble salt, the composition comprising seed crystals composed substantially of a target insoluble salt to be formed from the first soluble salt; and (b) collecting the target insoluble salt. These methods may be used, for example, to separate strontium from water that includes at least one soluble strontium salt and a second soluble salt (such as one soluble calcium salt).
    Type: Application
    Filed: December 6, 2013
    Publication date: June 12, 2014
    Applicant: ADVANCED WATER RECOVERY, LLC
    Inventors: Rakesh Govind, Robert Foster
  • 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: 20130319950
    Abstract: The present invention relates to urea-functionalized crystalline capsules self-assembled by sodium or potassium cation coordination and by hydrogen-bonding water bridges to selectively encapsulate tetrahedral divalent oxoanions from highly competitive aqueous alkaline solutions and methods using this system for selective anion separations from industrial solutions. The method involves competitive crystallizations using a tripodal tris(urea) functionalized ligand and, in particular, provides a viable approach to sulfate separation from nuclear wastes.
    Type: Application
    Filed: May 31, 2012
    Publication date: December 5, 2013
    Applicant: UT-BATTELLE, LLC
    Inventors: Radu Custelcean, Bruce A. Moyer, Arbin Rajbanshi
  • 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
  • Publication number: 20130118985
    Abstract: A method for removing heavy metals from contaminated water, comprising collecting metal salt precipitates from a water softening process, drying said precipitates, contacting water having a concentration of one or more heavy metals with said precipitates, and collecting water having a reduced concentration of said heavy metal(s).
    Type: Application
    Filed: January 2, 2013
    Publication date: May 16, 2013
    Applicant: KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY
    Inventor: King Abdulaziz City for Science and Technology
  • Patent number: 8329040
    Abstract: A new method for removing ammonia nitrogen in coking wastewater is disclosed in this invention. It comprises steps as follow: introducing coking wastewater into a reaction pool into which magnesium and phosphate are added; adding sodium hydroxide to regulate the PH of the mixture around 9.0-10.5; separating the supernatant and the precipitate after proper agitation and natural precipitation; dehydrating the precipitate and then adding alkaline fly ash, water to the dehydrated precipitate and stirring the mixture; decomposing the mixture with heating and absorbing the ammonia gas thereof produced with acidic solution. In consideration of high concentration of ammonia nitrogen in coking wastewater, this invention aims at quick and efficient treatment. The concentration of ammonia nitrogen in treated water meets the highest discharge standard stipulated in [China National] Integrated Wastewater Discharge Standard (GB8978-96).
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: December 11, 2012
    Assignee: Nanjing University
    Inventors: Hongqiang Ren, Lili Ding, Tao Zhang
  • Publication number: 20120261351
    Abstract: A system and method for removing water from sludge including mixing a blending material into the sludge and compressing the mixture. Additional pre and post compression steps are disclosed. Examples of specific blending materials and methods for their use are disclosed.
    Type: Application
    Filed: April 13, 2011
    Publication date: October 18, 2012
    Inventor: Dominic O Rathallaigh
  • Patent number: 8246837
    Abstract: A method for removal of ammonia from a polluted medium avoids the disadvantages related to the chemical-physical properties of an ammonium-containing salt (MAP). The method has improved technical and economical operational parameters and produces a reusable and environmentally friendly nitrogen fertilizer. All chemical processes and mechanical steps of the method are carried out in one single container, with the different steps divided into time phases. The chemical products are prevented from transportation between compartments and contact with pumps and pipes. Only liquids without precipitates are in contact with these elements. The method is applicable to ammonia-containing water from leachate, wastewater, the food industry, and agriculture.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: August 21, 2012
    Assignee: Skap Holding ApS
    Inventor: Poul Erik Bundgaard Jensen
  • Patent number: 8211314
    Abstract: The present disclosure describes using the naturally present dissolved chemicals as precipitants from local water sources to form an adsorbent and a process of purifying the water using natural resources. The adsorbent may be processed at the right pH and temperature to purify and remove heavy metals from waste water. Once the heavy metals are removed the concentration of the heavy metals are estimated in the reusable water. The local authority acceptable level heavy metal containing reusable water is reclaimed for non-human consumption. This disclosure enables to conserve water and provide a cheap and an effective method to decontaminate industrial waste water.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: July 3, 2012
    Assignee: King Abdulaziz City for Science and Technology “KACST”
    Inventor: Saad A Al-Jlil
  • Patent number: 8197696
    Abstract: Methods are disclosed for the precipitation of magnesium hydroxide in a standalone basis or in conjunction with the precipitation of calcium in different forms from saline streams. Methods are also disclosed for flue gas scrubbing in conjunction with the precipitation methods or in a standalone basis. Among the benefits of the disclosed methods is that their resulted spent saline stream and/or gas can be used, for instance, to feed seawater desalination plants and/or to enhance hydrocarbons recovery.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: June 12, 2012
    Inventor: Mansour S. Bader
  • Publication number: 20120136074
    Abstract: Low molecular weight gelators, methods of making such gelators, organogels comprising such gelators and systems and methods of using such gelators for the containment and/or remediation of a release and/or spill of a crude oil, a petroleum product and/or a chemical is described. In exemplary systems and methods, gels and/or emulsions formed from the combination and/or contact of such gelators and at least one of a crude oil, a petroleum product and a chemical from a release and/or spill into the environment can be used to recover these oils or chemicals while allowing the gelators to be recovered and reused to clean up or contain additional crude oil, petroleum products or chemicals.
    Type: Application
    Filed: August 26, 2011
    Publication date: May 31, 2012
    Applicant: GEORGETOWN UNIVERSITY
    Inventors: Richard G. Weiss, Ajaya Mallia Viswanatha Mallya
  • 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: 8147702
    Abstract: The present disclosure describes using the naturally present dissolved chemicals as precipitants from local water sources to form an adsorbent. The adsorbent may be collected and used at the right pH and temperature to purify and remove heavy metals from waste water. Once the heavy metals are removed the concentration of the heavy metals are estimated in the reusable water. The local authority acceptable level heavy metal containing reusable water is reclaimed for non-human consumption. This disclosure enables to conserve water and provide a cheap and an effective method to decontaminate industrial waste water.
    Type: Grant
    Filed: April 21, 2011
    Date of Patent: April 3, 2012
    Assignee: King Abdulaziz City for Science and Technology (KACST)
    Inventor: Saad A Al-Jlil
  • 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
  • Publication number: 20110278232
    Abstract: A method for removing heavy metals from contaminated water, comprising collecting metal salt precipitates from a water softening process, drying said precipitates, contacting water having a concentration of one or more heavy metals with said precipitates, and collecting water having a reduced concentration of said heavy metal(s).
    Type: Application
    Filed: May 11, 2010
    Publication date: November 17, 2011
    Applicant: KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY
    Inventors: Saad A. AL-JLIL, Omar A. AL-HARBI
  • Publication number: 20110220571
    Abstract: The present disclosure describes using the naturally present dissolved chemicals as precipitants from local water sources to form an adsorbent. The adsorbent may be collected and used at the right pH and temperature to purify and remove heavy metals from waste water. Once the heavy metals are removed the concentration of the heavy metals are estimated in the reusable water. The local authority acceptable level heavy metal containing reusable water is reclaimed for non-human consumption. This disclosure enables to conserve water and provide a cheap and an effective method to decontaminate industrial waste water.
    Type: Application
    Filed: April 21, 2011
    Publication date: September 15, 2011
    Applicant: King Abdulaziz City for Organization Name Science and Technology "KACST"
    Inventor: Saad A. Al-Jlil
  • Publication number: 20110203998
    Abstract: A new method for removing ammonia nitrogen in coking wastewater is disclosed in this invention. It comprises steps as follow: introducing coking wastewater into a reaction pool into which magnesium and phosphate are added; adding sodium hydroxide to regulate the PH of the mixture around 9.0-10.5; separating the supernatant and the precipitate after proper agitation and natural precipitation; dehydrating the precipitate and then adding alkaline fly ash, water to the dehydrated precipitate and stirring the mixture; decomposing the mixture with heating and absorbing the ammonia gas thereof produced with acidic solution. In consideration of high concentration of ammonia nitrogen in coking wastewater, this invention aims at quick and efficient treatment. The concentration of ammonia nitrogen in treated water meets the highest discharge standard stipulated in [China National] Integrated Wastewater Discharge Standard (GB8978-96).
    Type: Application
    Filed: July 25, 2008
    Publication date: August 25, 2011
    Applicant: NANJING UNIVERSITY
    Inventors: Hongqiang Ren, Lili Ding, Tao Zhang
  • Patent number: 8002989
    Abstract: An energy efficient desalination process that does not produce waste products involves the extraction of water from a first solution, such as seawater, by using a second concentrated solution to draw the water from the first solution across a semi-permeable membrane. By manipulating the equilibrium of the soluble and insoluble species of solute within the second solution in favor of the soluble species of the solute, a saturated second solution can be used to generate osmotic pressure on the first solution. Also, by adjusting the equilibrium in favor of the less soluble species after the water has been drawn from the first solution, a portion of the solute can easily be precipitated out. Heating the second solution decomposes the solute into its constituent gasses. The constituent gasses and precipitated solute may be recycled through the process to affect the changes in equilibrium and eliminate waste products.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: August 23, 2011
    Assignee: Yale University
    Inventor: Robert L. McGinnis
  • Publication number: 20110084029
    Abstract: A system and method for removing water from sludge is disclosed. The method (100) includes: de-watering (102) the sludge comprising an output from a wastewater treatment system to form a semi-solid sludge cake; dispensing (104) the semi-solid sludge cake in a hopper and dispensing a dewatering agent in a recipient dewatering agent hopper; depositing (10) the semi-solid sludge cake and the dewatering agent in a mixing device; mixing (108) the semi-solid sludge cake and the dewatering agent having a porous structure in a weight ratio of the semi-solid sludge cake to the dewatering agent of about from 1:1 to about 10:1; and compressing (110) the semi-solid sludge cake and the dewatering agent to release moisture. The system (100) provides an improved method of de-watering sludge, for more efficient processing, transporting and recycling, depending on the application.
    Type: Application
    Filed: October 8, 2009
    Publication date: April 14, 2011
    Inventor: Dominick O' Reilly
  • Publication number: 20110000856
    Abstract: A process for removal of non-polar compounds from water, wherein the non-polar compounds exist in dissolved or dispersed form, wherein the water is led through a preparation tank wherein the temperature is adjusted and wherein possible solid particles are removed. The water is then led via pipe into a reactor tank and is mixed with a hydrate forming compound, wherein simultaneously hydrate seeds are added which have been recycled for continuous use in the process; whereby the drops or molecules of the non-polar compounds are attached or associated to hydrate particles being formed in the reactor tank. The hydrate particles are separated from the water and melted. The hydrate forming compound is recycled to the reactor tank and the non-polar compounds discharged. In addition, a device for use of the process as well as hydrates for removal of non-polar compounds in water.
    Type: Application
    Filed: July 7, 2008
    Publication date: January 6, 2011
    Applicant: ECOWAT AS
    Inventors: Tore Skjetne, Roar Larsen, Are Lund
  • 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: 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
  • 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
  • Patent number: 7713416
    Abstract: A process for transforming sludge into NPK type granulated fertilizer in which the energy consume is reduced a 90% thanks to the addition of a special filtration step in which the water content is reduced a 50% and the remaining water is evaporated by the exothermic reaction occurring in the process. Additionally, the process of the present invention includes mechanisms that allow some of the by products generated by some of the reactions, to adsorb crystallization water and reduce the humidity of the mass without using external energy.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: May 11, 2010
    Assignee: Chemical Biosolids Inc.
    Inventor: José Cabello-Fuentes
  • 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: 20100065505
    Abstract: The invention concerns a method and an apparatus for removal of ammonium from a polluted media, which avoid the disadvantages related to the chemical-physical properties of MAP, with the aim to improve the technical and economical operational parameters and to produce a reusable and environmental friendly produced nitrogen fertiliser. The invention concerns a method and a apparatus where all chemical processes and mechanical steps are carried out in one single container with the different steps split in time phases, whereby the chemical products are prevented from transportation between compartments and contact with pumps and pipes. Only liquids without precipitates are in contact with these elements. The apparatus includes a process container, an elevator unit and a flexible membrane which together enables all chemical processes, separation, mixing and gas extraction to be carried out in the same compartment.
    Type: Application
    Filed: October 17, 2007
    Publication date: March 18, 2010
    Inventor: Poul Erik Bundgaard Jensen
  • 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: 7591952
    Abstract: A product and apparatus for cleaning water or industrial and sewage waste water includes a mixture of diatomite that is heated and stirred to impart an enhanced negative electrical charge to the diatomite. A mixture of approximately 50% aluminium chloride (AlCl3) by volume is blended to provide a powder mixture for use as a flocculant in the system. According to a modification, the charged diatomite is instead blended with a mixture of approximately 50% ferric chloride (FeCl3) by volume and is stored in liquid form for later use as a flocculent in the system. From one to five percent, by volume, of polyacrylamide is preferably added to the mixture for use in sewage waste water treatment applications. An efficient system for reacting either the mixture or separately adding the diatomite and the metallic chloride to the water is described.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: September 22, 2009
    Inventor: Wing Yip Young
  • Publication number: 20090230054
    Abstract: Pollutants, such as heavy metals, phosphorus, and pathogenic organisms, are removed from water by adding a chemical coagulant to water within an enclosure. With mixing, coagulation and flocculation occur, and a floc containing the pollutant settles to the enclosure bottom; so the treated water above the floc is free from at least some of the pollutant. The water and the settled floc are mixed to resuspend floc components containing additional contaminant-removal capability. In an alternate system, the floc can be removed from the enclosure, dried, and added back to the enclosure to employ additional contaminant-removal capability. In another system, treated water is exposed to a pH buffering agent to reduce acidity therein.
    Type: Application
    Filed: March 30, 2009
    Publication date: September 17, 2009
    Inventor: Thomas A. DeBusk
  • Patent number: 7569737
    Abstract: A method for reducing the salinity, as well as the hydrocarbon concentration of produced water to levels sufficient to meet surface water discharge standards. Pressure vessel and coflow injection technology developed at the Oak Ridge National Laboratory is used to mix produced water and a gas hydrate forming fluid to form a solid or semi-solid gas hydrate mixture. Salts and solids are excluded from the water that becomes a part of the hydrate cage. A three-step process of dissociation of the hydrate results in purified water suitable for irrigation.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: August 4, 2009
    Assignee: UT-Battelle, LLC
    Inventors: Tommy J. Phelps, Costas Tsouris, Anthony V. Palumbo, David E. Riestenberg, Scott D. McCallum
  • Patent number: 7560028
    Abstract: Disclosed is a method that achieves water desalination by utilizing and optimizing clathrate hydrate phenomena. Clathrate hydrates are crystalline compounds of gas and water that desalinate water by excluding salt molecules during crystallization. Contacting a hydrate forming gaseous species with water will spontaneously form hydrates at specific temperatures and pressures through the extraction of water molecules from the bulk phase followed by crystallite nucleation. Subsequent dissociation of pure hydrates yields fresh water and, if operated correctly, allows the hydrate-forming gas to be efficiently recycled into the process stream.
    Type: Grant
    Filed: July 18, 2006
    Date of Patent: July 14, 2009
    Assignee: Sandia Corporation
    Inventors: Blake A. Simmons, Robert W. Bradshaw, Daniel E. Dedrick, David W. Anderson
  • Patent number: 7510660
    Abstract: Pollutants, such as heavy metals, phosphorus, and pathogenic organisms, are removed from water by adding a chemical coagulant to water within an enclosure. With mixing, coagulation and flocculation occur, and a floc containing the pollutant settles to the enclosure bottom; so the treated water above the floc is free from at least some of the pollutant. Some of the treated water is removed from the enclosure, and new water is added. The new water and the settled floc are mixed to resuspend floc components. The process is repeated until the floc no longer exhibits contaminant-removal capability. In an alternate system, a matrix element is deployed within the enclosure, which captures a portion of the floc that settles within the water column. Pollutants in new water added to the enclosure encounter these suspended floc particles and are subsequently removed from the water.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: March 31, 2009
    Inventor: Thomas A. DeBusk
  • Publication number: 20090050570
    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: Application
    Filed: February 19, 2007
    Publication date: February 26, 2009
    Applicant: OTV SA
    Inventor: Philippe Sauvignet
  • Patent number: 7470330
    Abstract: A method of removing metal scale from surfaces that includes contacting the surfaces with a first aqueous solution of a chelating agent, allowing the chelating agent to dissolve the metal scale, acidifying the solution to form a precipitant of the chelating agent and a precipitant of the metal from the metal scale, isolating the precipitant of the chelating agent and the precipitant of the metal from the first solution, selectively dissolving the precipitated chelating agent in a second aqueous solution, and removing the precipitated metal from the second solution is disclosed.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: December 30, 2008
    Assignees: M-1 Production Chemicals UK Limited, Oilfield Mineral Solutions Limited
    Inventor: Richard Keatch
  • Publication number: 20080314830
    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: Application
    Filed: June 22, 2007
    Publication date: December 25, 2008
    Applicant: I. KRUGER INC.
    Inventors: Kashi Banerjee, Charles D. Blumenschein, John Charles Schrader