Sirofloc (CSIRO Flocculation)
Sirofloc (CSIRO Flocculation) : A process for purifying municipal water supplies by flocculation, developed by the Commonwealth Scientific & Industrial Research Organization (CSIRO), Australia. Powdered magnetite, which has been given a special surface treatment, is added to the water. Particulate impurities such as clays adhere to these particles by colloidal forces. The magnetite particles are removed by a magnetic separator, chemically cleaned, and re-used. The effluent from this process occupies a much smaller volume than the traditional alum sludge
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