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Strategies to enhance the removal of Fluoroquinolones

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dc.contributor.authorAmorim, Catarina L.
dc.contributor.authorMaia, Alexandra S.
dc.contributor.authorMoreira, Irina S.
dc.contributor.authorvan Loosdrecht, Mark C.M.
dc.contributor.authorTiritan, Maria E.
dc.contributor.authorCastro, Paula M.L.
dc.date.accessioned2013-12-10T10:36:46Z
dc.date.available2013-12-10T10:36:46Z
dc.date.issued2013
dc.description.abstractFluoroquinolones (FQs) are broad-spectrum antibiotics that play an important role in the treatment of serious bacterial infections. Currently, several FQs are available but ciprofloxacin (CPF), ofloxacin (OFL) and norfloxacin (NOR) are amongst the most worldwide prescribed antibiotics. Antibiotics can reach wastewater treatment plants (WWTP) from different routes. Thus removal of these contaminants during the biotreatment process is of major importance in order to avoid their release to other environmental matrices. Granular sludge sequencing batch reactors (SBR) constitute a novel biofilm technology for wastewater treatment extremely promising for the treatment of effluents containing toxic compounds. Therefore, in this study a granular sludge SBR, established with activated sludge from a WWTP, was operated for the treatment of an aqueous stream containing FQs. No evidence of FQ biodegradation followed by HPLC with Fluorescence Detection was observed but FQs adsorbed to the aerobic granular sludge, being gradually released into the medium after withdrawal of the FQs in the inlet stream. In a previous study, Labrys portucalensis F11 demonstrated to be able to degrade FQs, namely OFL, NOR and CPF, when supplied individually or as a mixture, in the presence of an easy degradable carbon source. Different removal extents were obtained for the tested concentrations (ranging from 0.8 to 30 μM), but overall the uptake capacity of strain F11 for individual FQs decreased with increasing the initial FQ concentration. When supplied with a mixture FQs, strain F11 concomitantly removed each target antibiotic but a decrease on the biodegradability of FQs was observed which could be explained by competition mechanisms. The ability of Labrys portucalensis F11 to grow using the readily available carbon source while maintain its ability to degrade FQs reinforce the potential of this strain in bioaugmentation processes. As the indigenous microbial communities in biotreatment processes rarely are able to remove such contaminants, using this promising FQ-degrading strain, bioaugmentation strategies such as inoculation of the degrading strain, as a suspension or immobilized on carrier material, or using a plasmid donor strain carrying the degradative genes, could be assessed to improve FQ removal. Acknowledgments: C.L. Amorim, A.S. Maia and I.S. Moreira wish to acknowledge the research grants from Fundação para a Ciência e Tecnologia (FCT), Portugal (Ref. SFRH/BD/47109/2008, SFRH/BD/86939/2012 and SFRH/BPD/87251/2012, respectively) and Fundo Social Europeu (Programa Operacional Potencial Humano (POPH), Quadro de Referência Estratégico Nacional (QREN))). This work was supported by FCT through the projects PTDC/EBB-EBI/111699/2009 and PEst-OE/EQB/LA0016/2011.por
dc.identifier.citationAMORIM, Catarina L. [et al.] - Strategies to enhance the removal Of Fluoroquinolones. In Portuguese Congress of Microbiology and Biotechnology' 2013, Aveiro, Portugal, 6-8 December 2013 – In MICROBIOTECH 2013: Book of Abstracts. p.198. Available at: http://microbiotec13.web.ua.pt/docs/e-book%20Microbiotec%202013%20Aveiro.pdfpor
dc.identifier.urihttp://hdl.handle.net/10400.14/13367
dc.language.isoengpor
dc.peerreviewednopor
dc.relationPTDC/EBB-EBI/111699/2009 e PEst-OE/EQB/LA0016/2011por
dc.relation.publisherversionhttp://microbiotec13.web.ua.pt/docs/e-book%20Microbiotec%202013%20Aveiro.pdfpor
dc.subjectFluoroquinolonespor
dc.subjectAerobic granular sludgepor
dc.titleStrategies to enhance the removal of Fluoroquinolonespor
dc.typeconference object
dspace.entity.typePublication
person.familyNameMaia
person.familyNameMoreira
person.familyNameTiritan
person.familyNameCastro
person.givenNameAlexandra S.
person.givenNameIrina Susana Sousa
person.givenNameMaria Elizabeth
person.givenNamePaula
person.identifierK-5841-2014
person.identifier1310409
person.identifier2013444
person.identifier.ciencia-id6A15-F0A3-AEF2
person.identifier.ciencia-id161E-A350-7FDE
person.identifier.ciencia-idD915-BFC0-FB3A
person.identifier.ciencia-id7C1F-6C72-354A
person.identifier.orcid0000-0002-4167-383X
person.identifier.orcid0000-0001-6516-0994
person.identifier.orcid0000-0003-3320-730X
person.identifier.orcid0000-0001-8841-6606
person.identifier.ridK-5841-2014
person.identifier.ridK-9492-2014
person.identifier.ridM-8241-2013
person.identifier.scopus-author-id55332349300
person.identifier.scopus-author-id36798094100
person.identifier.scopus-author-id6602890981
person.identifier.scopus-author-id7102781782
rcaap.rightsopenAccesspor
rcaap.typeconferenceObjectpor
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