Patents Assigned to Nalco Limited
  • Treatment of agricultural waste
    Patent number: 5531907
    Abstract: The present invention provides a method for purifying agricultural waste. The method includes the steps of adding effective amounts of at least one polymer flocculent, at least one coagulant, and at least one precipitant. The combined effect of the various components of the present invention not only purifies the agricultural waste but also yields a dewatered organic mass for composting to act as a peat replacement.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: July 2, 1996
    Assignee: Nalco Limited
    Inventors: Paul J. Williams, Susan Tolkien