Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2010.3236.3242ElmollaEmad S. ChaudhuriMalay 1220101024The study was undertaken to examine the effect of H2O2/Fe2+ molar ratio as one of the important operating conditions on the performance of combined photo-Fenton-SBR process for treatment of recalcitrant (antibiotic) wastewater. The SBR was fed with photo-Fenton-treated antibiotic wastewater under five H2O2/Fe2+ molar ratio (10, 20, 50, 100 and 150). The results indicated that, as H2O2/Fe2+ molar ratio decreases (increase of Fe2+ concentration), BOD5/COD ratio of the photo-Fenton-treated effluent increases and SBR and overall efficiency increases. The SBR efficiency in terms of sCOD removal was observed to be very sensitive to BOD5/COD ratio below 0.40. It decreased from 69±1% at BOD5/COD ratio of 0.49±0.01 to 44±1% at 0.19±0.02. In this study, the best H2O2/Fe2+ molar ratio for treatment of the antibiotic wastewater was observed to equal 20. At photo-Fenton-SBR operating conditions (H2O2/Fe2+ molar ratio 20, H2O2/COD molar ratio 2.5, pH 3 and 30 min photo-Fenton irradiation time and 24 h hydraulic retention time in SBR), the combined photo-Fenton-SBR efficiency (overall) was 86% as sCOD and final sCOD was 56±2 mg L-1, which meets the requirements of the discharge standard.]]>Al-Momani, F., E. Touraud, J.R. Degorce-Dumas, J. Roussy and O. Thomas,2002153191197Anderson, P.D., V.J. D'Aco, P. Shanahan, S.C. Chapra and M.E. Buzby et al.,200438839849APHA.,199218th Edn.,Pages: 1100Pages: 1100Carballa, M., F. Omil, J.M. Lema, M. Llompart and C. Garcia-Jares et al.,20043829182926Chamarro, E., A. Marco and S. Esplugas,20013510471051Elmolla, E. and M. Chaudhuri,2009170666672Elmolla, E.S. and M. Chaudhuri,200917214761481Elmolla, E.S. and M. Chaudhuri,20102 and UV/H2O2/TiO2 photocatalysis.]]>2524652Elmolla, E.S. and M. Chaudhuri,2010173445449Elmolla, E.S. and M. Chaudhuri,20102564347Elmolla, E.S., M. Chaudhuri and M.M. Eltoukhy,2010179127134Farre, M.J., X. Domenech and J. Peral,2007147167174García-Montańo, J., F. Torrades, J.A. García-Hortal, X. Domenech and J. Peral,2006678692García-Montańo, J., F. Torrades, J.A. García-Hortal, X. Domenech and J. Peral,2006134220229Gonzalez, O., M. Esplugas, C. Sans, A. Torres and S. Esplugas,20094321492158Ikehata, K., N.J. Naghashkar and M.G. Ei-Din,200628353414Joseph, J.M., H. Destaillats, H.M. Hung and M.R. Hoffmann,2000104301307Kanay, H.,1983E. coli trains isolated from healthy adult animals and humans.]]>45171178Kolpin, D.W., E.T. Furlong, M.T. Meyer, E.M. Thurman, S.D. Zaugg, L.B. Barber and H.T. Buxton,20023612021211Mace, S. and J. Mata-Alvarez,20024155395553Malaysian Environmental Quality,19791979Martín, M.M.B., J.A.S. Pèrez, J.LC. López, I. Oller and S.M. Rodríguez,200943653660Nikolaou, A., S. Meric and D. Fatta,200738712251234Pera-Titus, M., V. Garcıa-Molina, M.A. Banos, J. Gimenez, and S. Esplugas,200447219256Pignatello, J.J., D. Liu and P. Huston,19993318321839Rabiet, M., A. Togola, F. Brissaud, J.L Seidel, H. Budzinski and F. Elbaz-Poulichet,20064052825288Raj, D.S.S. and Y. Anjaneyulu,200540165175Sarria, V., S. Parra, N. Adler, P. Peringer, N. Benitez and C. Pulgarin,200276301315Stackelberg, P.E., E.T. Furlong, M.T. Meyer, S.D. Zaugg, A.K. Henderson and D.B. Reissman,200432999113Talinli, I. and G.K. Anderson,199226107110Trovo, A.G., S.A.S. Melo and R.F.P. Nogueira,2008198215220Yang, L., L.E. Yu and M.B. Ray,20082 photocatalysis.]]>4234803488Walter, M.V. and J.W. Vennes,198550930933