Patents by Inventor Marc Roehl

Marc 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).

  • Hybrid aerobic and anaerobic wastewater and sludge treatment systems and methods
    Patent number: 9359238
    Abstract: A hybrid method and system of treating wastewater with reduced energy usage is disclosed. The treatment system has a sorption system, an anaerobic digester that digests or converts at least a portion of the solids or sludge from the sorption system, and an aerobic treatment tank that partially reduces oxygen demand of a portion of the sludge from the sorption tank.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: June 7, 2016
    Assignee: Evoqua Water Technologies LLC
    Inventors: Wenjun Liu, Edward John Jordan, Marc Roehl
  • HYBRID AEROBIC AND ANAEROBIC WASTEWATER AND SLUDGE TREATMENT SYSTEMS AND METHODS
    Publication number: 20140021130
    Abstract: A hybrid method and system of treating wastewater with reduced energy usage is disclosed. The treatment system has a sorption system, an anaerobic digester that digests or converts at least a portion of the solids or sludge from the sorption system, and an aerobic treatment tank that partially reduces oxygen demand of a portion of the sludge from the sorption tank.
    Type: Application
    Filed: September 20, 2013
    Publication date: January 23, 2014
    Applicant: SIEMENS WATER TECHNOLOGIES LLC
    Inventors: Wenjun Liu, Edward John Jordan, Marc Roehl
  • Screening of inert solids from a low-yield wastewater treatment process
    Patent number: 7569147
    Abstract: A method for removing inert solids from low-yield wastewater treatment processes. The method includes combining wastewater with bacteria-laden sludge in a mainstream reactor to form a mixed liquor, separating the mixed liquor into a clear effluent and activated sludge, returning a first portion of activated sludge to the mainstream reactor, treating a second portion of activated sludge in a sidestream bioreactor prior to returning the second portion of activated sludge to the mainstream reactor, and employing a screening device within the wastewater treatment process to remove inert solids.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: August 4, 2009
    Assignee: Siemens Water Technologies Corp.
    Inventors: Betty-Ann Curtis, Marc Roehl, Michael Doyle, Peter J. Petit
  • SCREENING OF INERT SOLIDS FROM A LOW-YIELD WASTEWATER TREATMENT PROCESS
    Publication number: 20070051677
    Abstract: A method for removing inert solids from low-yield wastewater treatment processes. The method includes combining wastewater with bacteria-laden sludge in a mainstream reactor to form a mixed liquor, separating the mixed liquor into a clear effluent and activated sludge, returning a first portion of activated sludge to the mainstream reactor, treating a second portion of activated sludge in a sidestream bioreactor prior to returning the second portion of activated sludge to the mainstream reactor, and employing a screening device within the wastewater treatment process to remove inert solids.
    Type: Application
    Filed: August 31, 2006
    Publication date: March 8, 2007
    Applicant: SIEMENS WATER TECHNOLOGIES CORP.
    Inventors: Betty-Ann Curtis, Marc Roehl, Michael Doyle, Peter Petit