Patents by Inventor Willem Iman Koster

Willem Iman Koster 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 processing a liquid nitrogen rich organic waste product, thereby obtained fertilizer solution and use thereof
    Patent number: 5656059
    Abstract: A method for processing a liquid nitrogen-rich organic waste product, in particular a manure product, to an aqueous fertilizer solution utilizes a biological conversion process so as to obtain a biologically stable fertilizer solution. This conversion process includes at least a nitrification step wherein nitrifiable ammonium nitrogen is converted in nitrate nitrogen and, only if the fraction to be nitrified has a too high content of nitrifiable nitrogen, a denitrification step. The fertilizer solution is separated off after the nitrification step so that it contains nitrate and only up to 150 mg NH.sub.4.sup.+ -N/l at most. The fertilizer solution can be used as leaf nutrition or in a hydroponic system.
    Type: Grant
    Filed: January 4, 1995
    Date of Patent: August 12, 1997
    Assignees: Epenhuysen Chemie N.V., Ecotechniek B.V.
    Inventors: Anthonie Leendert Monster, Willem Iman Koster