Patents by Inventor Arnold Gerrit Zilverentant

Arnold Gerrit Zilverentant 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).

  • Process for the treatment of waste water containing specific components e.g. ammonia
    Patent number: 6602417
    Abstract: A process is described for the biological treatment of waste water containing a specific component such as ammonia, wherein the waste water together with surplus sludge from an activated sludge reactor is treated in a bioaugmentation reactor, applying a hydraulic retention time in the continuously or discontinuously operated reactor which is shorter than the sludge retention time by retaining part of the sludge in the reactor and continuing the use of the separated part in the reactor. The non-retained part of the sludge, together with the effluent of the bioaugmentation reactor, is added to the activated sludge reactor.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: August 5, 2003
    Assignee: DHV Water B.V.
    Inventor: Arnold Gerrit Zilverentant