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EP0204273A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Process and apparatus for the removal of nitrate from surface water and ground water, especially from drinking water

Assignee: GG Noell GmbH
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Filing: 1986-05-30
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Granted: —
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Expires: 2006-05-30
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Abstract

Abstract Translated from German Verfahren zum Entfernen von Nitrat aus Oberflächen- und Grundwasser, insbesondere Trinkwasser, mit Hilfe der biologischen Denitrifikation, bei der in einem Reaktor zweistufigen (9, 16) mit Hilfe eines Biokatalysators (12, 19) mit immobilisierten Zellen, die in einem Gel oder Polymer vernetzt sind, die im Wasser enthaltenen Nitrate zu gasförmigem Stickstoff reduziert werden. Der vorzugsweise verwendete Stamm "Micrococcus denitrificans" benötigt für seinen Stoffwechsel Wasserstoff, der zudosiert wird (40, 2, 8, 15) und Kohlenstoff, der im Wasser in Form von gelöstem Kohlendioxid vorhanden ist. Durch die Verwendung eines Biokatalysators aus immobilisierten Zellen und dem verwendeten Bakterienstamm ist keine aufwendige Nachreinigung aufgrund erhöhter Bakterienzahlen im Reinwasserablauf erforderlich, und es entstehen keine unerwünschten Nebenprodukte. Process for removing nitrate from surface and ground water, especially drinking water, with the help of biological denitrification, in which two-stage (9, 16) in a reactor with the help of a biocatalyst (12, 19) with immobilized cells contained in a gel or polymer are cross-linked, the nitrates contained in the water are reduced to gaseous nitrogen. The preferably used strain "Micrococcus denitrificans" needs hydrogen for its metabolism, which is added (40, 2, 8, 15) and carbon, which is present in the water in the form of dissolved carbon dioxide. Due to the use of a biocatalyst consisting of immobilized cells and the bacterial strain used, no complex post-cleaning due to increased bacterial count in the pure water drain is required, and no undesirable by-products arise.

Inventors

  • 👤 Roman Dr. Dr.-Ing. Menzel
  • 👤 Peter Hoffmann
  • 👤 Klaus-Dieter Dr. Dipl.-Biochem. Vorlop

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 15:46
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/20; C02F3/00; C02F3/006; C02F3/02; C02F3/06; C02F3/10; C02F3/105; C02F3/108; C02F3/12; C02F3/26; C02F3/28; C02F3/2806; C02F3/30; C02F3/302; C02F3/32; C02F3/34; C12; C12N; C12N11/00; C12N11/02; C12N11/04; C02F2209/00; C02F2209/06; C02F2209/38; C02F2209/40; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/903

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