Patents Assigned to Andrea Egner
  • Process and device for reducing the nitrate content of water
    Patent number: 5871620
    Abstract: To decrease the nitrate content of water, it is proposed to reduce nitrate to nitrogen in two stages. The first of these stages is a photochemical reduction to nitrite, and the second stage is a reduction of nitrite to nitrogen using amidosulphuric acid.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: February 16, 1999
    Assignee: Andrea Egner
    Inventors: Helmar Haug, Eva Gotthold, Joffrey Janicke, Rene Janicke, Nadine Herter