title: Combined photo-fenton-SBR processes for the treatment of wastewater from the citrus processing industry.
abstract: In this study, the photo-Fenton process was combined with a sequencing batch reactor (SBR) for the treatment of synthetic samples of citrus wastewater (CWW). An experimental design based on the surface response methodology was applied to assess the individual and combined effects of several operating parameters (CODinitial, Fe3(+) concentration and H2O2 concentration) on the photo-Fenton treatment efficiency (DOC removal) with the aim of optimizing the process. The experimental results obtained under optimal conditions for CWW with high CODinitial (10000 mgO2/L) showed a partial degradation of organic matter of around of 61% (measured as DOC). Thereafter, the photo-Fenton effluent was neutralized and clarified before being subjected to the SBR reactor. The results show degradation yields up to 93% of the initial DOC removal without producing undesired side effects, using a hydraulic retention time (HRT) of 1.59 d. The final effluent contained a concentration of organic matter (measured as COD) of 120 mg O2/L.
authors.affiliation: Department of Chemical Engineering and Environmental Technologies, University of Zaragoza , C/María de Luna 3, 50018 Zaragoza, Spain.
authors.forename: José
authors.initials: J
authors.lastname: Guzmán
authors.forename: Rosa
authors.initials: R
authors.lastname: Mosteo
authors.forename: María P
authors.initials: MP
authors.lastname: Ormad
authors.forename: José L
authors.initials: JL
authors.lastname: Ovelleiro
mesh_terms: D019149:Bioreactors; D002957:Citrus / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007220:Industrial Waste / Q000032:analysis*; D007501:Iron / Q000737:chemistry*; D010782:Photolysis / Q000528:radiation effects; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
chemical_list: D006861:Hydrogen Peroxide; D007220:Industrial Waste; D007501:Iron; D062065:Wastewater; C045076:Fenton's reagent
keywords: SBR; citrus; photo-Fenton; wastewater