Patents by Inventor Stanley D. Miller

Stanley D. Miller 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).

  • Biological removal of phosphorus and nitrogen from wastewater using a stressed contact zone and a luxury contact zone
    Patent number: 5603833
    Abstract: This invention is directed to an activated sludge treatment process for removing phosphorus and nitrogen from wastewater. The process includes providing wastewater influent and activated sludge in a stressed contact zone to form a mixed liquor. In a luxury contact zone, the mixed liquor is mixed and aerated and the organisms in the activated sludge take up at least portion of the phosphorus. The method further includes separating the activated sludge from the mixed liquor, and returning at least a portion of the activated sludge to the stressed contact zone. The inventive process accomplishes wastewater treatment without having to pass the wastewater through an anaerobic zone.
    Type: Grant
    Filed: January 13, 1995
    Date of Patent: February 18, 1997
    Inventor: Stanley D. Miller