Potential of the perlite in the treatment

of domestic wastewater

 

F.Z. Aboussabiq1, I. Kader Yetteft1, M. Mountadar2*, S. Etahiri1, O. Assobhei1

1 Laboratoire de Biotechnologies marine et de l’environnement, Faculté des sciences,

Université Chouaib Doukkali, B.P : 20, 24000 El Jadida, Morocco.

2 Unité de chimie analytique et sciences de l’environnement, Faculté des sciences,

Université Chouaib Doukkali, B.P : 20, 24000 El Jadida, Morocco.

* Corresponding author. E-mail: mounta_dar@yahoo.fr

Received: 22 June 2012; revised version accepted: 17 February 2013

 

Abstract

     The potentials of using the perlite, clay Moroccan origin, in coagulation/flocculation for domestic wastewater were studied. The coagulation ability was assessed for the removal efficiency of chemical oxygen demand (COD) and total suspended solids (TSS). The influence of coagulant amount and pH on the coagulation-flocculation efficiency process was studied and conditions were optimized corresponding to the best removal of COD and TSS. The optimum dose of coagulant of 25mg/l gives removal efficiency of 66.8% and 98.9% respectively for COD and TSS. This optimum coagulant dose was found to be lower than that used for aluminium sulphate and lime. The influence of pH on coagulation effect was also investigated under the optimum dosage reached. Results showed that the best COD and TSS removal efficiency was obtained at pH 10 using perlite as coagulant.

 

Keywords: Coagulation-flocculation; Domestic wastewater; Aluminum sulfate; Perlite.

 

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