Patents Assigned to Transfield, Incorporated
  • Biological treatment of wastewater
    Patent number: 4663044
    Abstract: A wastewater treatment reaction vessel is operated with repeated sequences of aeration and non-aeration, using a single vessel or multiple vessels alternately, activated sludge which is acclimated for BOD reduction, nitrification or biological denitrification and phosphorus removal is absorptively reacted with influent wastewater, and the combined flow is passed into subsequent absorptive reactor volumes, reducing the BOD such that the effluent BOD is less than twenty percent that of the influent.
    Type: Grant
    Filed: September 13, 1985
    Date of Patent: May 5, 1987
    Assignee: Transfield, Incorporated
    Inventor: Mervyn C. Goronszy