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The removal of color and COD from wastewater containing water base color by coagulation process

Author(s): H. Asilian | Sh. Moradian fard | A. Rezaei | S. B. Mortazavi | A. Khavanin

Journal: International Journal of Environmental Science and Technology
ISSN 1735-1472

Volume: 3;
Issue: 2;
Start page: 153;
Date: 2006;
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Keywords: Color and COD removal | coagulation | ferrous sulfate | alum | lime | aqueous solution

In this study acrylic water base color was removed from synthetic wastewater using coagulation process. Experiments were conducted on the sample containing 100 mg/L and 400 mg/L of acrylic water base color. Destruction of color by means of coagulation/flocculation techniques using ferrous sulfate, alum, lime and polyelectrolyte (cationic, anionic and non ionic).The study was performed in a systematic approach searching optimum values of alum and FeSO4 concentration, pH and temperature. All the experiments were run in a laboratory scale .The obtained results show that treatment with alum and ferrous sulfate alone proved to be very effective in removing the color (> 99 %) and part of COD (60-70 %) from aqueous solution. Lime alone did not significant change on COD and color removal.
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