Patents by Inventor Michael R. Riffe

Michael R. Riffe 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).

  • Treatment of Liquid Streams Containing High Concentrations of Solids Using Ballasted Clarification
    Publication number: 20240140837
    Abstract: A high-solids wastewater treatment system is disclosed. The wastewater treatment system includes a ballasted reactor, a solids-liquid separation subsystem, a pre-treatment subsystem, a ballast feed subsystem, and a ballast recovery subsystem. The high-solids wastewater treatment system can include a reaction tank, a thickener, and a filter press. A method of treating high-solids wastewater is also disclosed. The method includes contacting a wastewater feed with a coagulant or flocculant, thickening the dosed wastewater, treating the effluent with a ballast, settling the treated wastewater, and conveying the ballasted sludge to the wastewater feed, dosed wastewater, or treated wastewater. The wastewater feed may have more than 500 mg/L of total suspended solids. The wastewater feed may contain inorganic solids.
    Type: Application
    Filed: January 10, 2024
    Publication date: May 2, 2024
    Applicant: Evoqua Water Technologies LLC
    Inventors: Paul Hoeferlin, Michael R. Riffe, Frank L. Sassaman
  • Treatment of Liquid Streams containing High concentration of Solids utilizing Ballasted Floc Technology
    Publication number: 20200255308
    Abstract: A high-solids wastewater treatment system is disclosed. The wastewater treatment system includes a ballasted reactor, a solids-liquid separation subsystem, a pre-treatment subsystem, a ballast feed subsystem, and a ballast recovery subsystem. The high-solids wastewater treatment system can include a reaction tank, a thickener, and a filter press. A method of treating high-solids wastewater is also disclosed. The method includes contacting a wastewater feed with a coagulant or flocculant, thickening the dosed wastewater, treating the effluent with a ballast, settling the treated wastewater, and conveying the ballasted sludge to the wastewater feed, dosed wastewater, or treated wastewater. The wastewater feed may have more than 500 mg/L of total suspended solids. The wastewater feed may contain inorganic solids.
    Type: Application
    Filed: August 17, 2018
    Publication date: August 13, 2020
    Applicant: Evoqua Water Technologies LLC
    Inventors: Paul Hoeferlin, Michael R. Riffe, Frank L. Sassaman
  • Concentration of wastewater to reduce flow rate, cost, and footprint of treatment system
    Patent number: 10723645
    Abstract: A system to remove contaminants from contaminated water contains a pre-concentrating subsystem, a contaminant removal subsystem or a biological subsystem configured to remove two or more contaminants, and a permeate blending subsystem. A process for removing contaminants from contaminated water includes concentrating contaminated water, treating concentrated contaminated water, and combining product water to produce environmentally acceptable product water.
    Type: Grant
    Filed: November 8, 2018
    Date of Patent: July 28, 2020
    Assignee: Evoqua Water Technologies LLC
    Inventors: Michael R. Riffe, Frank L. Sassaman, Michael W. Wismer
  • CONCENTRATION OF WASTEWATER TO REDUCE FLOW RATE, COST, AND FOOTPRINT OF TREATMENT SYSTEM
    Publication number: 20190135672
    Abstract: A system to remove contaminants from contaminated water contains a pre-concentrating subsystem, a contaminant removal subsystem or a biological subsystem configured to remove two or more contaminants, and a permeate blending subsystem. A process for removing contaminants from contaminated water includes concentrating contaminated water, treating concentrated contaminated water, and combining product water to produce environmentally acceptable product water.
    Type: Application
    Filed: November 8, 2018
    Publication date: May 9, 2019
    Applicant: Evoqua Water Technologies LLC
    Inventors: Michael R. Riffe, Frank L. Sassaman, Michael W. Wismer
  • Concentrating of wastewater to reduce flow rate, cost, and footprint of treatment system
    Patent number: 10125040
    Abstract: A system to remove contaminants from contaminated water contains a pre-concentrating subsystem, a contaminant removal subsystem or a biological subsystem configured to remove two or more contaminants, and a permeate blending subsystem. A process for removing contaminants from contaminated water includes concentrating contaminated water, treating concentrated contaminated water, and combining product water to produce environmentally acceptable product water.
    Type: Grant
    Filed: November 9, 2016
    Date of Patent: November 13, 2018
    Assignee: Evoqua Water Technologies LLC
    Inventors: Michael R. Riffe, Frank L. Sassaman, Michael W. Wismer
  • Concentrating of wastewater to reduce flow rate, cost, and footprint of treatment system
    Publication number: 20170081227
    Abstract: A system to remove contaminants from contaminated water contains a pre-concentrating subsystem, a contaminant removal subsystem or a biological subsystem configured to remove two or more contaminants, and a permeate blending subsystem. A process for removing contaminants from contaminated water includes concentrating contaminated water, treating concentrated contaminated water, and combining product water to produce environmentally acceptable product water.
    Type: Application
    Filed: November 9, 2016
    Publication date: March 23, 2017
    Inventors: Michael R. Riffe, Frank L. Sassaman, Michael W. Wismer