Treatment of fluoroacetate by a Pseudomonas fluorescens biofilm grown in membrane aerated biofilm reactor

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dc.contributor.author Heffernan, Barry
dc.contributor.author Murphy, Cormac D.
dc.contributor.author Syron, Eoin
dc.contributor.author Casey, Eoin
dc.date.accessioned 2011-01-24T14:53:39Z
dc.date.available 2011-01-24T14:53:39Z
dc.date.copyright 2009 American Chemical Society en
dc.date.issued 2009
dc.identifier.citation Environmental Science and Technology en
dc.identifier.issn 0013-936X
dc.identifier.uri http://hdl.handle.net/10197/2743
dc.description.abstract Fluorinated organic compounds have widespread applications, and their accumulation in the environment is a concern. Biofilm reactors are an effective technology for the treatment of contaminated wastewater, yet almost no research has been conducted on the effectiveness of biofilms for the biodegradation of fluorinated aliphatic compounds. In this paper we describe experiments undertaken to investigate the degradation of fluoroacetate using a membrane aerated biofilm reactor (MABR) by Pseudomonas fluorescens DSM8341. The concentration of fluoroacetate in the medium influenced biofilm structure, with less dense biofilm observed at lower fluoroacetate loading rates. As biofilm thickness increased, oxygen utilization decreased, probably as a consequence of increased resistance to oxygen transfer. Furthermore, most of the biofilm was anaerobic, since oxygen penetration depth was less than 1000 μm. Biofilm performance, in terms of fluoroacetate removal efficiency, was improved by decreasing the fluoroacetate loading rate, however increasing the intramembrane oxygen pressure had little effect on biofilm performance. A mathematical model showed that while fluoroacetate does not penetrate the entire biofilm, the defluorination intermediate metabolite glycolate does, and consequently the biofilm was not carbon limited at the biofilm−membrane interface where oxygen concentrations were highest. The model also showed the accumulation of the free fluoride ion within the biofilm. Overflow metabolism of glycolate was identified to be most likely a result of a combination of oxygen limitation and free fluoride ion inhibition. The study demonstrated the potential of MABR for treating wastewater streams contaminated with organofluorine compounds. en
dc.description.sponsorship Science Foundation Ireland en
dc.format.extent 3797939 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher ACS Publications en
dc.rights This document is the Accepted Manuscript version of a Published Work that appeared in final form in Environmental Science & Technology , copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/es9001554. en
dc.subject Fluorinated en
dc.subject Fluoroacetate en
dc.subject Biofilm en
dc.subject Reactor en
dc.subject Biodegradation en
dc.subject Pseudomonas fluorescens en
dc.subject.lcsh Organofluorine compounds en
dc.subject.lcsh Biofilms en
dc.subject.lcsh Pseudomonas fluorescens en
dc.subject.lcsh Biodegradation en
dc.title Treatment of fluoroacetate by a Pseudomonas fluorescens biofilm grown in membrane aerated biofilm reactor en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions Publisher's version en
dc.internal.webversions http://dx.doi.org/10.1021/es9001554 en
dc.status Peer reviewed en
dc.identifier.volume 43 en
dc.identifier.issue 17 en
dc.identifier.startpage 6776 en
dc.identifier.endpage 6785 en
dc.identifier.doi 10.1021/es9001554
dc.neeo.contributor Heffernan|Barry|aut| en
dc.neeo.contributor Murphy|Cormac D.|aut| en
dc.neeo.contributor Syron|Eoin|aut| en
dc.neeo.contributor Casey|Eoin|aut| en


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