Method for controlling the nitrification and/or denitrification of a sewage system

The method comprises determining a change of nitrification- and/or denitrification phase through a pH-value increase on the one hand and through a limit value of the pH-value on the other hand. The variation of pH value per unit time is used as regulation parameter for immediately starting the ventilation during the denitrification in order to dismantle of load impact. The change of ammonium concentration, the pH value, the oxygen content, the redox potential or the temperature is used as further regulation parameter. The method comprises determining a change of nitrification- and/or denitrification phase through a pH-value increase on the one hand and through a limit value of the pH-value on the other hand. The variation of pH value per unit time is used as regulation parameter for immediately starting the ventilation during the denitrification in order to dismantle of load impact. The change of ammonium concentration, the pH value, the oxygen content, the redox potential or the temperature is used as further regulation parameter. The change of pH-value per time-interval is calorimetrically, conductometrically, spectrometrically detected or detected by impedance. A location-dependent change of the pH value is used as regulation parameter. The determination of the regulation parameter is carried out in an activated-sludge tank during or after storing the waste water in the activated-sludge tank and/or vitalization pipe. After the determination of the regulation parameter, a spot nitrification is initiated. The nitrification is initiated by activation of the ventilation. The detection of the measuring value is carried out for determining the regulation parameter via sensors. The regulation parameters are smoothed by increasing a smoothed curve or over a proportional settlement to a parameter. The measured values are determined by sensors and a location dependent average is formed. A potential ventilation control is activated within the clarification plant in dependence of the pH-value-increase. Die Erfindung betrifft ein Verfahren zur Regelung der Nitrifikation und/oder Denitrifikation einer Kläranlage, wobei der Effekt des pH-Anstiegs auf Grund eines Belastungsstoßes sich in der biologischen Stufe oder bereits in den Becken und Leitungen davor beobachten lässt. So kann auch eine vor der biologischen Stufe angebrachte pH-Wert-Messung in eine Regelung mit einbezogen werden, um frühzeitig einen Belastungsstoß aufgrund externer oder interner Ereignisse zu erke