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Unreacted polyDADMAC presence in the treated water increase the treated water conductivity. At optimum dosage (1,000 mg/L), the conductivity was lesser than the initial value.
At one water treatment plant in the Otway region of Victoria, polyaluminium chloride replaced alum and in so doing SO 4 levels in the treated water were reduced from 27 to 4 - 5 mg/L. Previously, alum was dosed at 45 to 55 mg/L at this plant.
