Patents by Inventor Marc E. Roehl

Marc E. Roehl 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).

  • Aeration discs and methods for using same
    Patent number: 10532940
    Abstract: Aeration discs used in water treatment and methods of using same are disclosed. According to one or more embodiments, an aeration disc may comprise projections and depressions located on at least one of its surfaces. The aeration discs may be incorporated into aeration devices and water treatment systems.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: January 14, 2020
    Assignee: Evoqua Water Technologies LLC
    Inventors: George W. Smith, Mark F. Pamperin, Charles S. Applegate, Christopher K. Waul, Marc E. Roehl, Michael L. Doyle
  • Aeration Discs and Methods For Using Same
    Publication number: 20180111862
    Abstract: Aeration discs used in water treatment and methods of using same are disclosed. According to one or more embodiments, an aeration disc may comprise projections and depressions located on at least one of its surfaces. The aeration discs may be incorporated into aeration devices and water treatment systems.
    Type: Application
    Filed: September 11, 2015
    Publication date: April 26, 2018
    Inventors: George W. Smith, Mark F. Pamperin, Charles S. Applegate, Christopher K. Waul, Marc E. Roehl, Michael L. Doyle
  • Conditioning system for activated sludge wastewater treatment processes
    Patent number: 7993522
    Abstract: Wastewaters are treated by an activated sludge process that includes combining wastewater with bacteria-laden sludge in an activated sludge tank to form a mixed liquor, separating the mixed liquor into a clear effluent and activated sludge stream, pretreating at least a portion of the activated sludge stream in a conditioning tank, transferring at least a portion of the activated sludge stream in the conditioning tank to an interchange bioreactor operating in batch or continuous flow mode, processing the activated sludge stream within the interchange bioreactor by selecting desired growth conditions to cultivate at least one type of bacteria in the activated sludge stream, and returning at least a portion of the activated sludge stream in the bioreactor to the activated sludge tank. The process may further include a sidestream reactor to remove phosphates from the activated sludge stream leaving the interchange bioreactor.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: August 9, 2011
    Assignee: Siemens Industry, Inc.
    Inventors: Betty-Ann Curtis, Thomas Kutcher, Marc E. Roehl
  • Conditioning System for Activated Sludge Wastewater Treatment Processes
    Publication number: 20090078646
    Abstract: Wastewaters are treated by an activated sludge process that includes combining wastewater with bacteria-laden sludge in an activated sludge tank to form a mixed liquor, separating the mixed liquor into a clear effluent and activated sludge stream, pretreating at least a portion of the activated sludge stream in a conditioning tank, transferring at least a portion of the activated sludge stream in the conditioning tank to an interchange bioreactor operating in batch or continuous flow mode, processing the activated sludge stream within the interchange bioreactor by selecting desired growth conditions to cultivate at least one type of bacteria in the activated sludge stream, and returning at least a portion of the activated sludge stream in the bioreactor to the activated sludge tank. The process may further include a sidestream reactor to remove phosphates from the activated sludge stream leaving the interchange bioreactor.
    Type: Application
    Filed: January 24, 2007
    Publication date: March 26, 2009
    Inventors: Betty-Ann Curtis, Thomas Kutcher, Marc E. Roehl