Dynamic simulator for dosing of water treatment chemicals

Dynamic simulators were developed for analysing of two water treatment processes. Simulators contain a dynamic linguistic equation (LE) model for the water treatment unit, controllers for dosing of chemicals and a soft sensor describing the quality of inlet water. Simulators were built in Matlab Simulink. Dynamic LE models have been tested with on-line data collected from two flotation units. According to these tests, the generated dynamic models provided a good prediction for the outlet turbidity. Simulators were also extended to a tuning and testing environment for controllers. Simulation makes the implementation of controllers faster at a mill.