CONTROL SYSTEM AND METHOD FOR SUPPRESSING BIOLOGICAL GROWTH, SCALE FORMATION AND/OR CORROSION IN A RECIRCULATING EVAPORATIVE COOLING FACILITY.

A control system suppresses biological growth, scale formation and/or corrosion in a recirculating evaporative cooling facility ( 1 ). The control system is configured to: monitor a value (C) from at least one sensor ( 19 a - l ). The value is indicative of an ion concentration in a cooling liquid of the recirculating evaporative cooling facility ( 1 ). The control system controls at least one flow regulation device ( 21, 23 ) for regulating the hydraulic operation of at least one de-ionising unit ( 13 ) of the recirculating evaporative cooling facility ( 1 ). The control system is configured to control at least one parameter of hydraulic operation of the at least one de-ionising unit ( 13 ) based on an adaptive target water saving as long as the monitored value (C) does not pass a pre-determined threshold.