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Water Science & Technology Vol 66 No 1 pp 217–223 © IWA Publishing 2012 doi:10.2166/wst.2012.155

Influence of physico-chemical treatment on the subsequent biological process treating paper industry wastewater

Mouhamed el khames Saad, Younes Moussaoui, Asma Zaghbani, Imen Mosrati, Elimame Elaloui and Ridha Ben Salem

Materials, Environment and Energy Laboratory (06/UR/12-01), Science Faculty of Gafsa, 2112, Gafsa, University of Gafsa, Tunisia
Physical Organic Chemistry Laboratory (UR11ES74), Science Faculty of Sfax, University of Sfax, 3018, Sfax, Tunisia E-mail: Ridha.BenSalem@voila.fr
Science Faculty of Gafsa, University of Gafsa, 2112, Gafsa, Tunisia


ABSTRACT

The present paper presents the main results of the biodegradation study of paper industry wastewater through physico-chemical treatment. Indeed, around 60% of chemical oxygen demand (COD) removal can be achieved by electroflocculation treatment. Furthermore, a removal efficiency of the COD of almost 91% has been obtained by biological treatment, with activated amount of sludge for 24 h of culture. Concerning the physico-chemical pre-treatment of the untreated, filtered and electroflocculated rejection effluents, it has been investigated through the degradation curve of COD studies.

Keywords: activated sludge treatment; biodegradation; electroflocculation; filtration; pulp and paper mill effluent


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