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A. Szygula, E. Guibal, M. A. Palaci′n, M. Ruiz and A. M. Sastre, “Removal of an Anionic Dye (Acid Blue 92) by Coagulation-Flocculation Using Chitosan,” Journal of Environmental Managemet, Vol. 90, No. 10, 2009, pp. 2979-2986. doi:10.1016/j.jenvman.2009.04.002

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• TITLE: Pretreatment of Wastewater Streams from Petroleum/Petrochemical Industries Using Coagulation

  AUTHORS: Hossam Altaher, Emad ElQada, Waid Omar

  KEYWORDS: Ferric Chloride, Coagulation, Wastewater, Petrochemicals, Pretreatment

  JOURNAL NAME: Advances in Chemical Engineering and Science, Vol.1 No.4, October 26, 2011

  ABSTRACT: Coagulation-flocculation processes using different types of conventional coagulants, namely, ferric chloride (FeCl3), aluminum sulfate (AL2(SO4)3·18H2O), lime and ferrous sulfate (FeSO4) were investigated using the Jar-test technique. A further aim is to determine the optimum conditions for the treatment of industrial wastewater effluents i.e. coagulant dosage, mixing rate, temperature and pH control. Under optimal condition of process parameters, coagulation/flocculation process was able to lower the turbidity well below the permissible level (1.8 NTU). The results indicate that ferric chloride had superior efficiency compared with other coagulants with efficient dose of 800 mg/l. The optimal initial pH of the effluents that enhanced the turbidity removal was 8.6. The temperature showed no significant effect on the turbidity removal.