Patents Assigned to Republic Services, Inc.
  • Method for removing per- and polyfluoroalkyl substances (PFAS) from waste water
    Patent number: 11840471
    Abstract: Disclosed is a method for enhancing the removal of a per- and polyfluoroalkyl substances (PFAS) component from waste water using a cationic polymer (e.g., a cationic polymer flocculant or coagulant). The cationic polymer enables gas that is diffused through the waste water to carry at least a portion of the PFAS component to the surface of water, creating a foam that can then be removed.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: December 12, 2023
    Assignee: REPUBLIC SERVICES, INC.
    Inventors: Pavan Puttamraju, Kevin D. Torrens, Yun Yu
  • Gas ventilation and leachate drain assemblage for landfill
    Patent number: 10661319
    Abstract: An assemblage of containers holding a porous medium is established in a landfill in fluid communication with a leachate drainage layer. A gas extraction well is drilled through the waste matter layers of the landfill into the assemblage. The assemblage augments gas flow throughout the landfill to the gas extraction well and drainage of leachate percolating through the landfill to the leachate drainage layer.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: May 26, 2020
    Assignee: Republic Services, Inc.
    Inventors: Michael Beaudoin, David Penoyer