Patents Assigned to Ashco-A-Corporation
  • Home wastewater treatment plant
    Patent number: 6287469
    Abstract: A method and equipment are disclosed for tertiary sewage treatment by naturally-occurring microorganisms after the sewage has passed from a septic tank or other primary treatment device. Tertiary treatment occurs within enclosed, controlled conditions in a recirculation tank housing a recirculating spray system and a filter bed. The recirculation process is controlled by a timer and a timer float responding to the wastewater level in the recirculation tank. A mixing zone is provided in a bottom portion of the recirculation tank.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: September 11, 2001
    Assignee: Ashco-A-Corporation
    Inventors: Paul R. Ashburn, Edward T. Cogar