Patents Assigned to Infrastructure Alternatives
  • Method and apparatus for remediating wastewater holding areas and the like
    Patent number: 7005064
    Abstract: A method and apparatus for remediating wastewater holding areas and the like includes a closed, foraminous dewatering membrane that is positioned adjacent to the wastewater holding area. Sludge and adjacent water on the bottom of the wastewater holding area are pumped in the form of a sludge slurry into the interior of the dewatering membrane. The water is removed from the sludge slurry by allowing gravitational forces to flow water through the dewatering membrane. The dewatering membrane is then opened, and the dewatered sludge is removed for depositing at an appropriate site.
    Type: Grant
    Filed: August 16, 2004
    Date of Patent: February 28, 2006
    Assignee: Infrastructure Alternatives
    Inventors: Robert A. Keller, William J. Cretens, Kent T. Depuydt, Dana J. Trierweiler, Russell D. Johnson, Dean R. Wickoren
  • Method and apparatus for remediating wastewater holding areas and the like
    Patent number: 6835314
    Abstract: A method and apparatus for remediating wastewater holding areas and the like includes a closed, foraminous dewatering membrane that is positioned adjacent to the wastewater holding area. Sludge and adjacent water on the bottom of the wastewater holding area are pumped in the form of a sludge slurry into the interior of the dewatering membrane. The water is removed from the sludge slurry by allowing gravitational forces to flow water through the dewatering membrane. The dewatering membrane is then opened, and the dewatered sludge is removed for depositing at an appropriate site.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: December 28, 2004
    Assignee: Infrastructure Alternatives
    Inventors: Robert A. Keller, William J. Cretens, Kent T. Depuydt, Dana J. Trierweiler, Russell D. Johnson, Dean R. Wickoren
  • METHOD AND APPARATUS FOR REMEDIATING WASTEWATER HOLDING AREAS AND THE LIKE
    Publication number: 20030062319
    Abstract: A method and apparatus for remediating waster water holding areas and the like includes a closed, foraminous dewatering membrane that is positioned adjacent to the wastewater holding area. Sludge and adjacent water on the bottom of the wastewater holding area are pumped in the form of a sludge slurry into the interior of the dewatering membrane. The water is removed from the sludge slurry by allowing gravitational forces to flow water through the dewatering membrane. The dewatering membrane is then opened, and the dewatered sludge is removed for depositing at an appropriate site.
    Type: Application
    Filed: March 8, 2002
    Publication date: April 3, 2003
    Applicant: Infrastructure Alternatives
    Inventors: Robert A. Keller , William J. Cretens , Kent T. Depuydt , Dana J. Trierweiler , Russell D. Johnson , Dean R. Wickoren