Verfahren zum Starten und Steuern eines Biologischen Verfahrens zur Ammoniumentfernung bei Niedrigen Ammoniumkonzentrationen und bei Niedriger Temperatur durch Verwendung eines Zweistufigen Autotrophen Stickstoffentfernungsverfahrens

Details

Veröffentlichungs-Nr.

EP3255016

Aktenzeichen

EP16382266

Anmeldetag

10. Juni 2016

Veröffentlichung

30. August 2023

Erteilung

30. August 2023

Rechtsraum

EP

IPC

C02F3/30// C02F3/28C02F3/34C02F3/00

Abstract

The invention relates to a method for starting up and controlling a biological autotrophic process for removing nitrogen contained in a wastewater stream at a temperature between 5 and 25°C and comprising an ammonium concentration equal to or below 110 mg N/L comprising the following stages, performed in separate units: (a) providing the wastewater stream to a partial nitritation reactor wherein a start-up of a partial nitritation takes place transforming the ammonium to nitrite in the presence of Ammonia Oxidizing Bacteria and oxygen while Free Nitrous Acid (FNA) is accumulated until reaching a value equal to or higher than 0.02 mg N/L; and (b) a second stage wherein a controlled effluent leaving the partial nitritation reactor and containing an ammonium to nitrite ratio from 0.7 to 1.0 is fed into one anoxic reactor wherein an Anammox process takes place transforming the ammonium and nitrite to nitrogen gas by an anoxic reaction performed by autotrophic denitrifying bacteria.

Anmelder

Firmen

FCC Aqualia, S.A.
Universidade de Santiago de Compostela

Land

🇪🇸 Spanien

Fachgebiete