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Ferric Sulphate Application: a) Before using, dissolve the product in running water in the proportion of 10-30% to have red brown solution, then dilute it to dosing solution required for coagulation, the concentration of dosing solution is 2 - 5% for drinking water treatment, and 5-10% for waste water treatment. b) Optimum dosage: viewing the different property of raw water, it can be
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