title: Evaluation of an aerobic treatment for olive mill wastewater detoxification.
abstract: Olive mill wastewater (OMWW) is a by-product of the olive oil extraction industry. Its dumping creates severe environmental problems in the Mediterranean countries. The phytoxicity of OMWW is due to the phenolic substances and is evaluated through a genotoxicity method. An aerobic treatment of OMWW was conducted during 45 days. Different concentrations of raw and treated OMWW were tested using the Vicia faba micronuclei test. Results showed that raw OMWW induced significant micronuclei formation at 10% of OMWW dilution. At 20% of dilution, no mitosis was recorded. The 45 days aerobic treatment OMWW showed an important decrease in the genotoxicity and also in the toxicity that was observed at 10% and 20% OMWW dilution. This could be correlated with the biodegradation of 76% of the total phenols. Indeed, qualitative analysis by high performance liquid chromatography shows the disappearance of the majority of phenolic compounds after 45 days of treatment. This study was completed by an agricultural test with V. faba plant. Data showed significant growth yield of 36.3% and 29.9% after being irrigated with 5 and 10 t/ha, respectively. These results supported the positive role of aerobic treatment on OMWW and their capacity to ameliorate the agronomic potential of these effluents.
authors.affiliation: a Laboratoire Ecologie et Environnement (Unité associée au CNRST-URAC 32, Unité associée au CNERS), Département de Biologie , Faculté des Sciences Semlalia, Université Cadi Ayyad , Marrakech BP 2390 , Morocco.
authors.forename: Houda
authors.initials: H
authors.lastname: El Hajjouji
authors.forename: Loubna
authors.initials: L
authors.lastname: El Fels
authors.forename: Eric
authors.initials: E
authors.lastname: Pinelli
authors.forename: Farid
authors.initials: F
authors.lastname: Barje
authors.forename: Abdelghani
authors.initials: A
authors.lastname: El Asli
authors.forename: Georges
authors.initials: G
authors.lastname: Merlina
authors.forename: Mohamed
authors.initials: M
authors.lastname: Hafidi
mesh_terms: D000332:Aerobiosis; D001419:Bacteria / Q000187:drug effects / Q000302:isolation & purification; D058491:Bacterial Load; D015169:Colony Count, Microbial; D005525:Food-Processing Industry; D005658:Fungi / Q000187:drug effects / Q000302:isolation & purification; D018525:Germination / Q000187:drug effects; D007220:Industrial Waste; D015162:Micronucleus Tests; D031658:Olea; D000069463:Olive Oil; D010636:Phenols / Q000032:analysis / Q000633:toxicity; D010938:Plant Oils; D012639:Seeds / Q000187:drug effects / Q000254:growth & development; D031307:Vicia faba / Q000187:drug effects / Q000254:growth & development; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater; D014873:Water Pollutants / Q000032:analysis / Q000633:toxicity
chemical_list: D007220:Industrial Waste; D000069463:Olive Oil; D010636:Phenols; D010938:Plant Oils; D062065:Wastewater; D014873:Water Pollutants
keywords: aerobic treatment; agronomic value; genotoxicity; olive mill wastewater; phenols