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dc.contributor.authorAhn, Johwan
dc.contributor.authorMcIlroy, Simon
dc.contributor.authorSchroeder, Sarah
dc.contributor.authorSeviour, Robert
dc.date.accessioned2017-05-03T15:51:33Z
dc.date.available2017-05-03T15:51:33Z
dc.date.issued2009
dc.date.modified2013-06-03T00:36:25Z
dc.identifier.issn13675435
dc.identifier.doi10.1007/s10295-009-0566-3
dc.identifier.urihttp://hdl.handle.net/10072/47598
dc.description.abstractLong-term inXuences of diVerent steady-state pH conditions on microbial community composition were determined by Xuorescence in situ hybridization (FISH) in a laboratory scale reactor conWgured for enhanced biological phosphorus removal (EBPR). Chemical proWles were consistent with shifts in populations from polyphosphateaccumulating organisms (PAO) to glycogen-accumulating organisms (GAO) when pH fell from pH 7.5 to 7.0 and then to 6.5. While biomass was both dispersed and Xocculated at pH 7.5, almost complete granulation occurred gradually after pH was dropped to 7.0, and these granules increased in size as the pH was reduced further to 6.5. Reverting back to pH 7.5 led to granule breakdown and corresponding increases in anaerobic phosphate release. Granules consisted almost entirely of Accumulibacter PAO cells, while putative GAO populations were always present in small numbers. Results suggest that low pH may contribute to granulation under these operational conditions. While chemical proWles suggested the PAO:GAO balance was changing as pH fell, FISH failed to reveal any marked corresponding increase in GAO abundances. Instead, TEM evidence suggested the Accumulibacter PAO phenotype was becoming more like that of a GAO. These data show how metabolically adaptable the Accumulibacter PAO can be under anaerobic:aerobic conditions in being able to cope with marked changes in plant conditions. They suggest that decreases in EBPR capacity may not necessarily reXect shifts in community composition, but in the existing population metabolism.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherSpringer
dc.publisher.placeGermany
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom885
dc.relation.ispartofpageto893
dc.relation.ispartofissue7
dc.relation.ispartofjournalJournal of Industrial Microbiology and Biotechnology
dc.relation.ispartofvolume36
dc.rights.retentionY
dc.subject.fieldofresearchMicrobial Ecology
dc.subject.fieldofresearchBiochemistry and Cell Biology
dc.subject.fieldofresearchFood Sciences
dc.subject.fieldofresearchIndustrial Biotechnology
dc.subject.fieldofresearchcode060504
dc.subject.fieldofresearchcode0601
dc.subject.fieldofresearchcode0908
dc.subject.fieldofresearchcode1003
dc.titleBiomass granulation in an aerobic:anaerobic-enhanced biological phosphorus removal process in a sequencing batch reactor with varying pH
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2009
gro.hasfulltextNo Full Text
gro.griffith.authorSchroeder, Sarah


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