Patent ID: 8298422
Filing Date: 2012-10-30
Classification: C02F,Y02W

Abstract:
1. A method for the treatment of effluents containing nitrogen in the form of ammonium, using a sequencing batch reactor ( 1 ), according to which: a volume of effluent to be treated in a complete cycle is introduced into the batch reactor in successive volume fractions, each volume fraction being treated during a subcycle, the successive introduction of the volume fractions making it possible to exert a bacterial selection pressure favorable to the development and to the activity of nitriting bacteria by means of ammoniacal single-shots, each subcycle comprises a phase of feeding with a volume fraction and, in an alternating manner, two treatment stages, i.e.: wherein: during the aerated first stage, the dissolved oxygen concentration in the batch reactor is maintained between 0.1 mgO the N—NO and the nonaerated stage is carried out by deammonification, without the provision of a carbon-based substrate.