Patents by Inventor Wilhelmus H. Rulkens

Wilhelmus H. Rulkens 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 and plant for the treatment of an aqueous waste stream
    Patent number: 7981291
    Abstract: The invention relates to a method for the treatment of an aqueous waste stream, wherein: (a) an aqueous waste stream is separated into an effluent and waste sludge; and (b) the waste sludge is converted into predated waste sludge in a predation reactor, the predation reactor including a support comprising worms and the waste sludge being fed past the support comprising worms. The invention further relates to an plant in which the method may be carried out, in particular to an plant for the treatment of an aqueous waste stream that comprises a predation reactor having a support comprising worms, wherein the predation reactor has two compartments that are separated by the support comprising worms.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: July 19, 2011
    Assignee: Stichting Wetsus
    Inventors: Hellen J. H. Elissen, Bastain R. Buys, Wilhelmus H. Rulkens, Bernard G. Temmink
  • Method and Plant for the Treatment of an Aqueous Waste Stream
    Publication number: 20100140165
    Abstract: The invention relates to a method for the treatment of an aqueous waste stream, wherein: (a) an aqueous waste stream is separated into an effluent and waste sludge; and (b) the waste sludge is converted into predated waste sludge in a predation reactor, the predation reactor including a support comprising worms and the waste sludge being fed past the support comprising worms. The invention further relates to an plant in which the method may be carried out, in particular to an plant for the treatment of an aqueous waste stream that comprises a predation reactor having a support comprising worms, wherein the predation reactor has two compartments that are separated by the support comprising worms.
    Type: Application
    Filed: May 15, 2006
    Publication date: June 10, 2010
    Inventors: Hellen J.H. Elissen, Bastain R. Buys, Wilhelmus H. Rulkens, Bernard G. Temmink