Patents by Inventor Seong-Hoon Yoon

Seong-Hoon Yoon 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).

  • Method of improving membrane bioreactor performance
    Patent number: 7378023
    Abstract: Cationic polymers having a molecular weight greater than about 200,000 can be added to the activated sludge in an MBR for industrial wastewater treatment for reasons, which include: conditioning the activated sludge; improving flux through a membrane in the MBR; reducing fouling of the of the membrane in the MBR; and reducing foaming of the activated sludge in the MBR.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: May 27, 2008
    Assignee: Nalco Company
    Inventors: Seong-Hoon Yoon, John H. Collins
  • Method of improving membrane bioreactor performance
    Publication number: 20080060996
    Abstract: Cationic polymers having a molecular weight greater than about 200,000 can be added to the activated sludge in an MBR for industrial wastewater treatment for reasons, which include: conditioning the activated sludge; improving flux through a membrane in the MBR; reducing fouling of the of the membrane in the MBR; and reducing foaming of the activated sludge in the MBR.
    Type: Application
    Filed: September 13, 2006
    Publication date: March 13, 2008
    Inventors: Seong-Hoon Yoon, John H. Collins
  • Method for improving flux in a membrane bioreactor
    Publication number: 20060272198
    Abstract: The invention pertains to a method(s) of improving flux in a membrane bioreactor by adding an effective amount of catonic, amphoteric, and zwitterionic polymers, or a combination thereof. The membrane bioreactor impacted by the addition of these polymers is made up of a combination of anaerobic reactors, anoxic reactors, and aerobic reactors and anaerobic digesters.
    Type: Application
    Filed: June 1, 2005
    Publication date: December 7, 2006
    Inventors: Seong-Hoon Yoon, John Collins, Jeroen Koppes, Ingmar Huisman
  • Method of using water soluble polymers in a membrane biological reactor
    Patent number: 6926832
    Abstract: A method of conditioning mixed liquor in a membrane biological reactor comprising adding to the mixed liquor an effective coagulating and flocculating amount of one or more water soluble cationic, amphoteric or zwitterionic polymers, or combination thereof and methods of reducing membrane fouling, enhancing membrane flux and reducing sludge production.
    Type: Grant
    Filed: December 26, 2002
    Date of Patent: August 9, 2005
    Assignee: Nalco Company
    Inventors: John H. Collins, Kristine S. Salmen, Deepak A. Musale, Seong-Hoon Yoon, William J. Ward
  • Combination polymer treatment for flux enhancement in MBR
    Publication number: 20040168980
    Abstract: A method of conditioning mixed liquor in a membrane biological reactor comprising adding one or more water soluble anionic polymers to the mixed liquor and also adding one or more water soluble cationic, amphoteric or zwitterionic polymers, or combination thereof; wherein said one or more water soluble anionic polymers may be added either before, simultaneously with or after the addition of said water soluble cationic, amphoteric or zwitterionic polymers is described and claimed. Also described and claimed are methods of reducing membrane fouling, enhancing membrane flux and reducing sludge production.
    Type: Application
    Filed: February 26, 2004
    Publication date: September 2, 2004
    Inventors: Deepak A. Musale, Seong-Hoon Yoon, John H. Collins
  • Method of using water soluble polymers in a membrane biological reactor
    Publication number: 20030159990
    Abstract: A method of conditioning mixed liquor in a membrane biological reactor comprising adding to the mixed liquor an effective coagulating and flocculating amount of one or more water soluble cationic, amphoteric or zwitterionic polymers, or combination thereof and methods of reducing membrane fouling, enhancing membrane flux and reducing sludge production.
    Type: Application
    Filed: December 26, 2002
    Publication date: August 28, 2003
    Inventors: John H. Collins, Kristine S. Salmen, Deepak A. Musale, Seong-Hoon Yoon, William J. Ward