Patents by Inventor Kenneth B. Vroom

Kenneth B. Vroom has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Sludge treatment
    Patent number: 4818405
    Abstract: Municipal sludge is converted from an environmental problem into soil amendment and electricity. Methane, produced in an anaerobic digester (2), is used partially to generate electricity and partially to dry the concentrated sludge in a rotary dryer (7). Excess heat from the dryer is used to maintain the temperature in the digester at approximately 105.degree. to 130.degree. F. Heavy metals are removed so that the dried sludge can be safely used as a soil amendment.
    Type: Grant
    Filed: January 15, 1988
    Date of Patent: April 4, 1989
    Inventors: Kenneth B. Vroom, Michael B. Rose