Patents by Inventor Suthan S. Suthersan

Suthan S. Suthersan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8703078
    Abstract: The invention relates to a system and method for the substantially permanent biogeochemical stabilization of solids impacted with hexavalent chromium/Cr(VI), including chromite ore processing residue (“COPR”). The invention comprises a novel treatment method of adding amendment(s) to COPR or other chromate impacted solids for the purpose of (1) weathering COPR minerals (when present) to convert the minerals that control alkalinity of the COPR to non-alkaline forms and liberate incorporated hexavalent chromium (Cr(VI)) in the process; (2) providing a chemical reductant (ferrous iron) to rapidly and permanently reduce the available Cr(VI) to trivalent form (Cr(III)); and/or (3) supporting longer-term biogeochemical Cr(VI) reduction enhanced by recycling of the chemical reductant, ultimately rendering the material non-hazardous as measured by acceptable methods.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: April 22, 2014
    Assignee: ARCADIS Corporate Services, Inc.
    Inventors: Jeff B. Gillow, John F. Horst, Suthan S. Suthersan
  • Publication number: 20110171723
    Abstract: The invention relates to a system and method for the substantially permanent biogeochemical stabilization of solids impacted with hexavalent chromium/Cr(VI), including chromite ore processing residue (“COPR”). The invention comprises a novel treatment method of adding amendment(s) to COPR or other chromate impacted solids for the purpose of (1) weathering COPR minerals (when present) to convert the minerals that control alkalinity of the COPR to non-alkaline forms and liberate incorporated hexavalent chromium (Cr(VI)) in the process; (2) providing a chemical reductant (ferrous iron) to rapidly and permanently reduce the available Cr(VI) to trivalent form (Cr(III)); and/or (3) supporting longer-term biogeochemical Cr(VI) reduction enhanced by recycling of the chemical reductant, ultimately rendering the material non-hazardous as measured by acceptable methods.
    Type: Application
    Filed: January 13, 2011
    Publication date: July 14, 2011
    Applicant: ARCADIS Corporate Services, Inc.
    Inventors: Jeff Gillow, John F. Horst, Suthan S. Suthersan
  • Publication number: 20090308816
    Abstract: The invention provides methods of precipitating metals from groundwater in a form that will remain stable under the aerobic conditions typical of most aquifers eliminating secondary water quality issues associated with reducing/anaerobic precipitation technologies.
    Type: Application
    Filed: June 3, 2009
    Publication date: December 17, 2009
    Inventors: John F. Horst, Jeff Gillow, Suthan S. Suthersan
  • Publication number: 20090311048
    Abstract: The invention provides methods of stabilizing mine tailing through the formation of solid evaporate mineral surface hardpan thereby stabilizing mine tailings and decreasing environmental contamination surrounding a tailings impoundment.
    Type: Application
    Filed: June 3, 2009
    Publication date: December 17, 2009
    Inventors: John F. Horst, Jeff Gillow, Suthan S. Suthersan
  • Patent number: 7301066
    Abstract: Methods of treating ground water and methods for reducing contaminants (e.g., chlorinated compounds in contaminated ground water) to harmless compounds in the presence of an elemental metal treatment composition. Said methods comprise injecting a treatment solution comprising a colloidal suspension of elemental metal particles (e.g., iron, a tin, a zinc, a palladium and mixtures thereof) having a nanoscale particle size and a carbohydrate in an organic liquid (e.g., dodecane, butyl acetate and polypropylene glycol ethyl ether acetate and mixtures thereof) into the ground, proximate to the contaminated ground water.
    Type: Grant
    Filed: July 12, 2004
    Date of Patent: November 27, 2007
    Assignee: Arcadis G&M, Inc.
    Inventors: David Vance, Suthan S. Suthersan, Peter Palmer
  • Publication number: 20040245187
    Abstract: When elemental iron is in the presence of chlorinated compounds (contaminants) a naturally occurring reaction takes place and the chlorinated compounds are reduced and form harmless compounds. The production of extremely small metal particles containing elemental iron or a mixture of elemental iron and a second metal is imperative to this method of treating contaminants and is the subject of the present invention. When the particle is small enough a surfactant is not required for the particle to do its job. The elemental metal may be kept in an elemental state by keeping it in an oxygen-scavenging environment. This is achieved by either suspending the nanoscale metal in a carbohydrate solution or by injecting a carbohydrate solution in atomized form into the gas used to inject the metal into the subsurface soil. Additionally, the present invention is to a method of using elemental metal to reductively dehalogenate halogenated hydrocarbons, to reduce soluble metals and to treat metalloids in subsurface soil.
    Type: Application
    Filed: July 12, 2004
    Publication date: December 9, 2004
    Applicant: Arcadis G&M, Inc.
    Inventors: David Vance, Suthan S. Suthersan, Peter Palmer
  • Patent number: 6777449
    Abstract: When elemental iron is in the presence of chlorinated compounds (contaminants) a naturally occurring reaction takes place and the chlorinated compounds are reduced and form harmless compounds. The production of extremely small metal particles containing elemental iron or a mixture of elemental iron and a second metal is imperative to this method of treating contaminants and is the subject of the present invention. When the particle is made small enough a surfactant is not required for the particle to do its job. The elemental metal may be kept in an elemental state by keeping it in an oxygen-scavenging environment. This is achieved by either suspending the nanoscale metal in a carbohydrate solution or by injecting a carbohydrate solution in atomized form into the gas used to inject the metal into the subsurface soil.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: August 17, 2004
    Assignee: Case Logic, Inc.
    Inventors: David Vance, Suthan S. Suthersan, Peter Palmer
  • Patent number: 6632364
    Abstract: An in situ method and system for reductive dechlorination, the precipitation of chromium, the precipitation of heavy metals, and microbial denitrification. The invention comprises the formation of in situ anaerobic reactive zones to precipitate and filter out dissolved heavy metals as metallic sulfides, to degrade nitrate to nitrogen gas, to reduce chlorinated hydrocarbons to ethene, and to precipitate and filter out chromium. The invention is comprised of an injection well or wells that extend into a contaminated groundwater. A conduit located within the injection well conveys a reagent to the contaminated groundwater. The reagent may be a carbohydrate rich solution. Microbes digest the carbohydrates to produce sulfate reducing and methanogenic conditions within the reactive zone that include a dissolved oxygen level less than about 0.5 mg/l, a redox potential less than about −250 mv, and a dissolved organic carbon to contaminant ratio of greater than about 50:1.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: October 14, 2003
    Assignee: Arcadis G & M
    Inventor: Suthan S. Suthersan
  • Publication number: 20020151602
    Abstract: When elemental iron is in the presence of chlorinated compounds (contaminants) a naturally occurring reaction takes place and the chlorinated compounds are reduced and form harmless compounds. The production of extremely small metal particles containing elemental iron or a mixture of elemental iron and a second metal is imperative to this method of treating contaminants and is the subject of the present invention. When the particle is made small enough a surfactant is not required for the particle to do its job. The elemental metal may be kept in an elemental state by keeping it in an oxygen-scavenging environment. This is achieved by either suspending the nanoscale metal in a carbohydrate solution or by injecting a carbohydrate solution in atomized form into the gas used to inject the metal into the subsurface soil.
    Type: Application
    Filed: December 19, 2001
    Publication date: October 17, 2002
    Applicant: ARCADIS Geraghty & Miller, Inc.
    Inventors: David Vance, Suthan S. Suthersan, Peter Palmer
  • Patent number: 6322700
    Abstract: An in situ method and system for reductive dechlorination, the precipitation of chromium, the precipitation of heavy metals, and microbial denitrification. The invention comprises the formation of in situ anaerobic reactive zones to precipitate and filter out dissolved heavy metals as metallic sulfides, to degrade nitrate to nitrogen gas, to reduce chlorinated hydrocarbons to ethene, and to precipitate and filter out chromium. The invention is comprised of an injection well or wells that extend into a contaminated groundwater. A conduit located within the injection well conveys carbohydrates and sulfates to the contaminated groundwater. Microbes digest the carbohydrates to produce sulfate reducing and methanogenic conditions within the reactive zone that include a dissolved oxygen level less than about 0.5 mg/l, a redox potential less than about −250 mv, and a dissolved organic carbon to contaminant ratio of greater than about 50:1.
    Type: Grant
    Filed: August 2, 2000
    Date of Patent: November 27, 2001
    Assignee: Arcadis Geraghty & Miller
    Inventor: Suthan S. Suthersan
  • Patent number: 6283674
    Abstract: A method and system for removing contaminants for the phreatic zone, also known as the saturation zone, or groundwater. The technique involves gas sparging and oxidation while increasing the surface area for mass transfer by the placing of packing balls into the eductor tube. The system is comprised of a means for supplying gas/ozone mixture to the lower extent of a well which induces a flow of groundwater and gas bubbles up the well. The system contains a conduit within the well, which extends below the water table The conduit has a lower fluid-permeable section which is located below the water table and an upper fluid-permeable section which is adjacent the water table.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: September 4, 2001
    Assignee: Arcadis Geraghty & Miller
    Inventor: Suthan S. Suthersan
  • Patent number: 6280118
    Abstract: A method and system are described for removing contaminants from the phreatic zone, also known as the saturation zone, or groundwater. A barrier wall is constructed below the ground surface and in the path of flow of a contaminated groundwater plume. A well is constructed in advance of the barrier wall and is connected to the barrier wall via a pipe. Various remediation media may be lowered into the well to perform remediation on the contaminated groundwater before it passes through the barrier wall.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: August 28, 2001
    Assignee: Arcadis Geraghty & Miller, Inc.
    Inventors: Suthan S. Suthersan, Gary Keyes, Kent O'Brien
  • Patent number: 6254310
    Abstract: A method and system for removing contaminants from the phreatic zone, also known as the saturation zone, or groundwater. The technique preferably involves gas sparging while slowing down the sparging process by placing packing balls into an eductor tube. A preferred embodiment of the system is comprised of a means for supplying gas to the lower extent of a well which induces a flow of groundwater and gas bubbles up the well. The system may also contain a conduit within the well which extends below the water table. The conduit has a lower fluid-permeable section which is located below the water table and an upper fluid-permeable section which is adjacent to the water table. The system may further comprise an eductor tube contained in the conduit which extends from the top extent of the conduit to the saturation zone. Packing balls may be located between the eductor tube and the means for supplying gas to the lower extent of the well.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: July 3, 2001
    Assignee: ARCADIS Geraghty & Miller, Inc.
    Inventor: Suthan S. Suthersan
  • Patent number: 6174108
    Abstract: A system for removing contaminants from the phreatic zone, also known as the saturation zone, or groundwater. The technique preferably involves gas sparging while slowing down the sparging process by placing packing balls into the eductor tube. A preferred embodiment of the system is comprised of a means for supplying gas to the lower extent of a well which induces a flow of groundwater and gas bubbles up the well. The system may also contain a conduit within the well which extends below the water table The conduit has a lower fluid-permeable section which is located below the water table and an upper fluid-permeable section which is adjacent to the water table the system may further comprise an eductor tube contained in the conduit which extends from the top extent of the conduit to the saturation zone. Packing balls may be located between the eductor tube and the means for supplying gas to the lower extends of the well.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: January 16, 2001
    Assignee: Arcadis Geraghty & Miller, Inc.
    Inventor: Suthan S. Suthersan
  • Patent number: 6143177
    Abstract: An in situ method and system for reductive dechlorination, the precipitation of chromium, the precipitation of heavy metals, and microbial denitrification. The invention comprises the formation of in situ anaerobic reactive zones to precipitate and filter out dissolved heavy metals as metallic sulfides, to degrade nitrate to nitrogen gas, to reduce chlorinated hydrocarbons to ethene, and to precipitate and filter out chromium. The invention is comprised of an injection well or wells that extend into a contaminated saturated zone. A conduit located within the injection well conveys carbohydrates and sulfates to the contaminated saturated zone. Microbes digest the carbohydrates to produce sulfate reducing and methanogenic conditions within the reactive zone that include a dissolved oxygen level less than about 0.5 mg/l, a redox potential less than about -250 mv, and a dissolved organic carbon to contaminant ratio of greater than about 50:1.
    Type: Grant
    Filed: September 21, 1998
    Date of Patent: November 7, 2000
    Assignee: Arcadis Geraghty & Miller, Inc.
    Inventor: Suthan S. Suthersan
  • Patent number: 6116816
    Abstract: A method and system are described for removing contaminants from the phreatic zone, also known as the saturation zone, or groundwater. A barrier wall is constructed below the ground surface and in the path of flow of a contaminated groundwater plume. A well is constructed in advance of the barrier wall and is connected to the barrier wall via a pipe. Various remediation media may be lowered into the well to perform remediation on the contaminated groundwater before it passes through the barrier wall.
    Type: Grant
    Filed: August 26, 1998
    Date of Patent: September 12, 2000
    Assignee: ARCADIS Geraghty & Miller, Inc.
    Inventors: Suthan S. Suthersan, Gary Keyes, Kent O'Brien
  • Patent number: 6102623
    Abstract: A method and system for removing contaminants for the phreatic zone, also known as the saturation zone, or groundwater. The technique involves gas sparging and oxidation while increasing the surface area for mass transfer by the placing of packing balls into the eductor tube. The system is comprised of a means for supplying gas/ozone mixture to the lower extent of a well which induces a flow of groundwater and gas bubbles up the well. The system contains a conduit within the well, which extends below the water table The conduit has a lower fluid-permeable section which is located below the water table and an upper fluid-permeable section which is adjacent the water table.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: August 15, 2000
    Assignee: ARCADIS Geraghty & Miller, Inc.
    Inventor: Suthan S. Suthersan
  • Patent number: 6007274
    Abstract: A method and system for removing contaminants for the phreatic zone, also known as the saturation zone, or groundwater. The technique involves gas sparging and oxidation while increasing the surface area for mass transfer by the placing of packing balls into the eductor tube. The system is comprised of a means for supplying gas/ozone mixture to the lower extent of a well which induces a flow of groundwater and gas bubbles up the well. The system contains a conduit within the well, which extends below the water table. The conduit has a lower fluid-permeable section which is located below the water table and an upper fluid-permeable section which is adjacent the water table.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: December 28, 1999
    Assignee: ARCADIS Geraghty & Miller
    Inventor: Suthan S. Suthersan
  • Patent number: 5588490
    Abstract: A method and apparatus for removing volatile contaminants from the phreatic zone of contaminated ground. The apparatus is a system comprised of at least one air injection well and at least two pressure relief wells arranged in a line. Air is injected into the contaminated ground water to allow sparging of the volatile contaminants from a linear region between injection and relief wells. The volatile contaminants are captured by the injected air and carried to the extraction line for removal and treatment.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: December 31, 1996
    Assignee: Geraghty & Miller, Inc.
    Inventors: Suthan S. Suthersan, Boris Dynkin, Richard Cushing
  • Patent number: 5575589
    Abstract: A method and apparatus for removing volatile contaminants from the phreatic zone of a contaminated region in the ground. The apparatus is a system comprised of a trench cut into the phreatic zone of contaminated ground containing fluid-permeable fill material, an air injection line submerged in the lower portion of the trench and an air/contaminant gas extraction line in the trench above the water table. Air is injected into the contaminated ground water to allow sparging of the volatile contaminants. The volatile contaminants are captured by the injected air and carded to the extraction line for removal and/or treatment.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: November 19, 1996
    Assignee: Geraghty & Miller, Inc.
    Inventor: Suthan S. Suthersan