Process for operating a denitrification plant and denitrification plant

摘要

Process for operating a denitrification plant in which oxidized nitrogen compounds are reduced in the presence of microorganisms and which - a reaction vessel (2), - a process water supply line (4) for passing process water containing oxidized nitrogen compounds into the reaction vessel (2), and an electron donor supply line (6) for conducting an electron donor in the reaction vessel (2), wherein a redox measured value of the in the reaction vessel (2) prevailing redox potential and a pH value of the in the reaction vessel (2) prevailing pH value are determined, and either a volume flow of process water or a volume flow of process water and a volume flow of electron donor, which are introduced into the reaction vessel (2), are controlled as a function of the redox measured value and the pH measured value.