Patents by Inventor Dimitrios Katehis

Dimitrios Katehis 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 for nitrogen removal and treatment of digester reject water in wastewater using bioaugmentation
    Patent number: 7404897
    Abstract: An efficient system and process for removing nitrogen from wastewater while enriching seed sludge in the mainstream treatment process. Bioaugmentation of seed autotrophic organisms facilitate the nitrification reactions by enhancing the rates of reaction advantageously within a smaller volume or within a shorter activated sludge solids retention time. Likewise, bioaugmentation of seed denitrification organisms will also enhance rate of reaction within a smaller volume or shorter activated sludge solids retention time. Separate treatment of high ammonia digester reject water is an efficient method to treat nitrogen in recycle streams as well as to enrich the seed nitrifying and denitrifying cultures.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: July 29, 2008
    Assignee: D.C. Water & Sewer Authority
    Inventors: Walter F. Bailey, Jr., Sudhir N. Murthy, Leonard Benson, Timothy Constantine, Glen T. Daigger, Thomas E. Sadick, Dimitrios Katehis
  • Method and apparatus for nitrogen removal and treatment of digester reject water in wastewater using bioagumenation
    Publication number: 20070251868
    Abstract: An efficient system and process for removing nitrogen from wastewater while enriching seed sludge in the mainstream treatment process. Bioaugmentation of seed autotrophic organisms facilitate the nitrification reactions by enhancing the rates of reaction advantageously within a smaller volume or within a shorter activated sludge solids retention time. Likewise, bioaugmentation of seed denitrification organisms will also enhance rate of reaction within a smaller volume or shorter activated sludge solids retention time. Separate treatment of high ammonia digester reject water is an efficient method to treat nitrogen in recycle streams as well as to enrich the seed nitrifying and denitrifying cultures.
    Type: Application
    Filed: July 12, 2007
    Publication date: November 1, 2007
    Inventors: Walter Bailey, Sudhir Murthy, Leonard Benson, Timothy Constantine, Glen Daigger, Thomas Sadick, Dimitrios Katehis
  • Method and apparatus for nitrogen removal and treatment of digester reject water in wastewater using bioaugmentation
    Publication number: 20070102356
    Abstract: An efficient system and process for removing nitrogen from wastewater while enriching seed sludge in the mainstream treatment process. Bioaugmentation of seed autotrophic organisms facilitate the nitrification reactions by enhancing the rates of reaction advantageously within a smaller volume or within a shorter activated sludge solids retention time. Likewise, bioaugmentation of seed denitrification organisms will also enhance rate of reaction within a smaller volume or shorter activated sludge solids retention time. Separate treatment of high ammonia digester reject water is an efficient method to treat nitrogen in recycle streams as well as to enrich the seed nitrifying and denitrifying cultures.
    Type: Application
    Filed: October 25, 2006
    Publication date: May 10, 2007
    Inventors: Walter Bailey, Sudhir Murthy, Leonard Benson, Timothy Constantine, Glen Daigger, Thomas Sadick, Dimitrios Katehis