OCDA provide an early warning to rapid changes in raw water turbidities e.g. storm water influence and allows the adjustment of coagulant chemicals necessary to maintain optimum water quality.
Operators that control the chemical dosage from a ‘gut feel’ based on years of experience have a tendency to overdose just to be on the safe side. OCDA not only eliminate the need to overdose, but they can actually help the operator optimize usage to the minimum level required to maintain optimum water quality. In most cases the chemical usage can be reduced with no effect on water quality.