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DatoValore
TitleRemoval of nalidixic acid and its degradation products by an integrated MBR-ozonation system
AbstractChemical-biological degradation of a widely spread antibacterial (nalidixic acid) was successfully obtained by an integrated membrane bioreactor (MBR)-ozonation process. The composition of the treated solution simulated the wastewater from the production of the target pharmaceutical, featuring high salinity and a relevant concentration of sodium acetate. Aim of treatment integration was to exploit the synergistic effects of chemical oxidation and bioprocesses, by adopting the latter to remove most of the COD and the ozonation biodegradable products. Integration was achieved by placing ozonation in the recirculation stream of the bioreactor effluent. The recirculation flow rate was three-fold the MBR feed. and the performance of the integrated system was compared to the standard polishing configuration (single ozonation step after the MBR). Results showed that the introduction of the ozonation step did not cause relevant drawbacks to both biological and filtration processes. nalidixic acid passed undegraded through the MBR and was completely removed in the ozonation step. Complete degradation of most of the detected ozonation products was better achieved with the integrated MBR-ozonation process than using the sequential treatment configuration, i.e. ozone polishing after MBR, given the same ozone dosage.
SourceJournal of hazardous materials (Print) 203-204, pp. 46–52
KeywordsMembrane bioreactor; Ozonation; Integrated process; Pharmaceutical wastewater; Salinity
JournalJournal of hazardous materials (Print)
EditorElsevier, New York ;, Paesi Bassi
Year2012
TypeArticolo in rivista
DOI10.1016/j.jhazmat.2011.11.072
AuthorsPollice A., Laera G., Cassano D., Diomede S., Pinto A., Lopez A., Mascolo G.
Text181160 2012 10.1016/j.jhazmat.2011.11.072 ISI Web of Science WOS 000300204800006 Membrane bioreactor; Ozonation; Integrated process; Pharmaceutical wastewater; Salinity Removal of nalidixic acid and its degradation products by an integrated MBR ozonation system Pollice A., Laera G., Cassano D., Diomede S., Pinto A., Lopez A., Mascolo G. Istituto di Ricerca Sulle Acque, Viale F. De Blasio 5, 70132 Bari Chemical biological degradation of a widely spread antibacterial nalidixic acid was successfully obtained by an integrated membrane bioreactor MBR ozonation process. The composition of the treated solution simulated the wastewater from the production of the target pharmaceutical, featuring high salinity and a relevant concentration of sodium acetate. Aim of treatment integration was to exploit the synergistic effects of chemical oxidation and bioprocesses, by adopting the latter to remove most of the COD and the ozonation biodegradable products. Integration was achieved by placing ozonation in the recirculation stream of the bioreactor effluent. The recirculation flow rate was three fold the MBR feed. and the performance of the integrated system was compared to the standard polishing configuration single ozonation step after the MBR . Results showed that the introduction of the ozonation step did not cause relevant drawbacks to both biological and filtration processes. nalidixic acid passed undegraded through the MBR and was completely removed in the ozonation step. Complete degradation of most of the detected ozonation products was better achieved with the integrated MBR ozonation process than using the sequential treatment configuration, i.e. ozone polishing after MBR, given the same ozone dosage. 203 204 http //www.sciencedirect.com/science/article/pii/S030438941101452X Articolo pubblicato 2012_JHazMat_203_204_46_52.pdf Articolo in rivista Elsevier 0304 3894 Journal of hazardous materials Print Journal of hazardous materials Print J. hazard. mater. Print Journal of hazardous materials. Print alfieri.pollice POLLICE ALFIERI giuseppe.laera LAERA GIUSEPPE antonio.lopez LOPEZ ANTONIO giuseppe.mascolo MASCOLO GIUSEPPE TA.P07.002.002 Sviluppo di nuovi processi di controllo dell inquinamento idrico. TA.P07.002.004 Processi biotecnologici e processi a membrana TA.P07.002.006 Trattamenti avanzati di ossidazione