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Objectif : Les margines sont le principal rejet liquide des huileries. Par leur composition chimique, elles possedent un pouvoir polluant tres eleve. Epandues sur les sols, les margines degradent la qualite du milieu. Methodologie et resultats : Dans le cadre des recherches sur les procedes de traitement des ces effluents, nous nous sommes interesses a la techniques de distillation. L’analyse physico-chimique de la margine brute et distillat, montre que ce dernier se caracterise par des abattements tres remarquables des composes phenoliques (97%), Demande Chimique en Oxygene (DOC) (92%), Demande Biologique en Oxygene (DBO) (96%), conductivite (99%,) et chlorures (97%). Conclusion et application des resultats : La distillation doit etre suivie d’une neutralisation par la chaux a cause de l’acidite elevee du distillat. Des recherches sur la valorisation du distillat et du residu sont en cours de realisation. Mots cles : margine d’huile d’olive, caracterisation, distillation, neutralisation. The treatment of olive oil mill wastewater by distillation followed by neutralization with lime Objective : The OMWW (olive oil mill wastewater) is the main liquid from olive oil mills. By its chemical composition, it has a very high polluting power. Applied to soil, vegetation, this water degrades the quality of the environment. The objective of this study was on treatment processes of these effluents, and particularly the distillation techniques. Methodology and results : The physico-chemical analysis of OMWW and its distillate showed that it is characterized by very remarkable reductions of phenolic compounds (97%), Chemical Oxygen Demand (DOC) (92%), Biological Oxygen Demand (BOD) (96%) conductivity (99%) and chloride (97%). Conclusion and application of results : The distillation must be followed by neutralization with lime due to the high acidity of the distillate. Research on optimization of the distillate and residue are in progress. Keywords : olive oil mill wastewater; characterization; distillation; neutralization.

Traitement de la margine brute d’huile d’olive par distillation suivi de neutralisation par la chaux