title: Adopting strategies to improve the efficiency of ozonation in the real-scale treatment of olive oil mill wastewaters.
abstract: In this experimental work the ozone action on the depuration of olive oil mill wastewater is studied for different operational conditions based on an actual industrial treatment plant. It was verified that the application of a Mn-Ce-O catalyst prepared at the laboratory, with a Mn/Ce molar proportion of 70/30, enhances the depuration efficiency and the effluent biodegradability. Ozonation operation at the natural pH of the effluent is recommended. Moreover, the integration of the Fenton process as a pretreatment improves the final chemical oxygen demand removal and enables a totally biodegradable effluent to be obtained, as confirmed by respirometric techniques.
authors.affiliation: GERSE, Group on Environment, Reaction and Separation Engineering, Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, Pólo II--Rua Silvio Lima, 3030-790 Coimbra, Portugal.
authors.forename: Rui C
authors.initials: RC
authors.lastname: Martins
authors.forename: Adrián M T
authors.initials: AM
authors.lastname: Silva
authors.forename: Sérgio
authors.initials: S
authors.lastname: Castro-Silva
authors.forename: Paulo
authors.initials: P
authors.lastname: Garção-Nunes
authors.forename: Rosa M
authors.initials: RM
authors.lastname: Quinta-Ferreira
mesh_terms: D001673:Biodegradation, Environmental; D019649:Food Industry; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry; D000069463:Olive Oil; D010126:Ozone / Q000737:chemistry*; D010938:Plant Oils; D014873:Water Pollutants / Q000302:isolation & purification*
chemical_list: C045076:Fenton's reagent; D007220:Industrial Waste; D000069463:Olive Oil; D010938:Plant Oils; D014873:Water Pollutants; D010126:Ozone; D006861:Hydrogen Peroxide; D007501:Iron