title: Combined post-ozonation and biological treatment of recalcitrant wastewater from a resin-producing factory.
abstract: In this study, effluent from the biological treatment of wastewater from a resin-producing factory containing recalcitrant compounds was ozonated under different conditions. Afterwards, the biodegradability of the ozonated effluent was studied under anoxic conditions. The post-ozonation of the industrial effluent was performed using a wide range of ozone doses, from 1.8 to 29.5 mg L(-1)min(-1). After the biological treatment of the ozonated effluent, organic carbon and nitrogen removals from 27 to 97% and from 27 to 80%, respectively, were achieved. The effect of the contact time was studied at a constant ozone dose of 13.0+/-1.2 mg L(-1)min(-1) and contact times ranging from 30 to 180 min. In this case, organic carbon removals from 55 to 100% and organic nitrogen removals from 41 to 77% were obtained after biological treatment.
authors.affiliation: Chemical Engineering Laboratory, Faculty of Sciences, University of A Coruña, Rúa Alejandro de la Sota no. 1, 15008-A Coruña, Spain.
authors.forename: M A
authors.initials: MA
authors.lastname: Aparicio
authors.forename: M
authors.initials: M
authors.lastname: Eiroa
authors.forename: C
authors.initials: C
authors.lastname: Kennes
authors.forename: M C
authors.initials: MC
authors.lastname: Veiga
mesh_terms: D001673:Biodegradation, Environmental; D002617:Chemical Industry; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D010126:Ozone; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D007220:Industrial Waste; D010126:Ozone