PROCESS FOR THE ELIMINATION OF NITRATES BY A MICROBIOLOGICAL CONVERSION IN THE PRESENCE OF GASEOUS HYDROGEN

摘要

In a microbiological process for the elimination of nitrates from an aqueous liquid, the liquid to be denitrified passes through a first reaction zone containing a denitrifying biomass which utilizes hydrogen and into which hydrogen gas is injected. Effluent from the first reaction zone is introduced into a second reaction zone containing a nitrifying biomass which is also contacted by an oxygen-containing gas.