Author(s)

R. Ben Achma^1*, A. Ghorbel¹, A. Dafinov², F. Medina²

¹Laboratoire de Chimie des Matériaux et Catalyse, Département de Chimie, Faculté des Sciences de Tunis, Tunis, Tunisie.
²Chemical Engineering Department, University Rovira i Virgili, Tarragona, Spain.

Because phenolic compounds are toxic for methanogenic bacteria many problems concerning the high toxicity and biodegradability of the olive oil mill wastewater (OMW) have been encountered during anaerobic treatments of this effluent. In this work, we try to develop a new catalytic process for the degradation of phenolic compounds, producing less toxic OMW for methanogenic bacteria, facilitating the anaerobic digestion. This process consists of an oxidative reaction using copper supported on alumina pillared clay in presence of a photocatalytic system (H₂O₂ with UV light). Preliminary results showed that the use of the copper supported catalyst in presence of 0.88% H₂O₂ (v/v) allows after 2 h colour reduction (25%), significant abatement of total organic carbon (40%), and important removal of polyphenolic compounds (63%) especially those of high molecular mass and subsequently decreases the OMW toxicity from 100% to 70%. This catalytic pre-treatment process of OMW was efficient for anaerobic digestion.

Copper, Pillared Clay, Wet Hydrogen Peroxide Catalytic Oxidation, Anaerobic Digestion

Achma, R. , Ghorbel, A. , Dafinov, A. and Medina, F. (2014) Anaerobic Digestion of Olive Oil Mill Wastewater Pre-Treated with Catalytic Wet Peroxide Photo-Oxidation Using Copper Supported Pillared Clay Catalysts. Journal of Materials Science and Chemical Engineering, 2, 9-17. doi: 10.4236/msce.2014.26003.