Abstract: A device for carrying out a method for controlling a content of microorganisms in a liquid includes a measuring unit, a control unit, a supply unit and a computing unit. The measuring unit measures the microorganism content. The control unit determines a dosage of a biocide on the basis of the measured microorganism content using a model with at least one parameter, in order to achieve a predefined microorganism content. The supply unit supplies the biocide to the liquid in the dosage determined by the control unit. The computing unit calculates the at least one parameter from a recording of the microorganism content measured by the measuring unit over at least one past time interval and the amount of biocide supplied in this time interval.

Abstract: Device and method for controlling a content of microorganisms in a liquid, the device carrying out the method and comprising: a measuring unit for measuring the microorganism content, a control unit which, in order to achieve a predefined microorganism content, determines a dosage of a biocide on the basis of the measured microorganism content using a model with at least one parameter, a supply unit, which supplies the biocide to the liquid in the dosage determined by the control unit, and a computing unit, which calculates the at least one parameter from a recording of the microorganism content measured by the measuring unit over at least one past time interval and the amount of biocide supplied in this time interval.