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Congo River Waters Characterization and their Disinfection by Calcium Hypochlorite and their Treatment by Flocculation using Lime and Aluminum Sulphate

Author Affiliations

  • 1Unité de Recherche Chimie, Faculté des Sciences, Université des Sciences et Techniques de Masuku, Franceville, GABON
  • 2Laboratoire de Contrôle de Qualité, Société Nationale de Distribution d’Eau, Brazzaville, CONGO

Res.J.chem.sci., Volume 3, Issue (7), Pages 80-86, July,18 (2013)


The flocculation and the chlorination are two methods very used for the water treatment. The purpose of our study is the characterization of waters of Congo River, the determination of the dose of chlorine, lime and sulphate of aluminum necessary for their disinfection and their flocculation. It appears from all the results that, the best treatment by flocculation-coagulation is obtained by the application of a combination of 25 mg/L from sulfate of aluminum and 10 mg/L of lime. Whereas the best conditions of disinfection are obtained for 6 mg/L of hypochlorite of calcium and a pH value 6.48.


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