Patents by Inventor Claude Grimaud

Claude Grimaud 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).

  • Method for purifying carbon-containing pollution and denitrifying waste water in oxygenic medium
    Patent number: 6254778
    Abstract: The invention is a biological process for purifying waste water in order to produce an effluent with a low content of carbon and of oxygenated nitrogen compounds. The process includes an initial step of mixing the waste water in a biological reactor with activated sludge to denitrify the resulting mixture. Then, air is introduced into the mixture to form an anoxic sludge thereby directly oxidizing carbon present in the anoxic sludge and removing carbon therefrom, simultaneous with the denitrification. The anoxic sludge is clarified to separate it from a denitrified intermediate effluent. The clarified anoxic sludge is recycled to the biological reactor.
    Type: Grant
    Filed: March 2, 1999
    Date of Patent: July 3, 2001
    Assignee: Degremont
    Inventors: Pavel Chudoba, Claude Grimaud, Roger Pujol