Importance

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Abstract

A method and control unit for controlling a ballast water treatment system are disclosed. In the method, a prevailing operational condition value relating to the filter unit and/or the treatment unit is determined by means of a sensor. Based on the determined prevailing condition value, a modifying action is performed. The method further includes, when repeated during a determined time interval, tracking a trend for the development of the prevailing operational condition values and/or a frequency for the modifying actions. Based on the tracked trend, a moment in time where a critical value for the prevailing operational condition value is predicted. The ballast water treatment system is controlled by performing the modifying action on the basis of the prediction and/or the value for the determined prevailing condition.

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First Claim