Patents by Inventor Asher Keithley

Asher Keithley 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).

  • Nitrogen sparging assisted anoxic biological water treatment system
    Patent number: 11802067
    Abstract: Systems and methods are provided for nitrogen gas sparging assisted biological treatment of water. In one example, a denitrification system may include a media-packed column or bed through which nitrogen gas is sparged to remove dissolved oxygen from water. In some examples, an external carbon source and electron donor may be added to the media-packed column or bed to facilitate biological removal of the nitrate and/or other contaminants from the water. In this way, by relying on the sparged nitrogen gas to remove the dissolved oxygen, less of the external carbon source and electron donor may be employed as compared to denitrification systems not assisted by nitrogen gas sparging.
    Type: Grant
    Filed: March 4, 2021
    Date of Patent: October 31, 2023
    Assignee: UNITED STATES GOVERNMENT, AS REPRESENTED BY THE ADMINISTRATOR OF THE U.S. EPA
    Inventors: Asher Keithley, Daniel Williams, Nicholas Dugan, Darren Lytle
  • NITROGEN SPARGING ASSISTED ANOXIC BIOLOGICAL WATER TREATMENT SYSTEM
    Publication number: 20210276909
    Abstract: Systems and methods are provided for nitrogen gas sparging assisted biological treatment of water. In one example, a denitrification system may include a media-packed column or bed through which nitrogen gas is sparged to remove dissolved oxygen from water. In some examples, an external carbon source and electron donor may be added to the media-packed column or bed to facilitate biological removal of the nitrate and/or other contaminants from the water. In this way, by relying on the sparged nitrogen gas to remove the dissolved oxygen, less of the external carbon source and electron donor may be employed as compared to denitrification systems not assisted by nitrogen gas sparging.
    Type: Application
    Filed: March 4, 2021
    Publication date: September 9, 2021
    Inventors: Asher Keithley, Daniel Williams, Nicholas Dugan, Darren Lytle