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dc.contributor.authorBialek, Katarzyna
dc.contributor.authorCysneiros, Denise
dc.contributor.authorO'Flaherty, Vincent
dc.date.accessioned2019-09-11T14:03:05Z
dc.date.available2019-09-11T14:03:05Z
dc.date.issued2013-07-25
dc.identifier.citationBialek, Katarzyna, Cysneiros, Denise, #x, & Flaherty, Vincent. (2013). Low-temperature (10°C) anaerobic digestion of dilute dairy wastewater in an EGSB bioreactor: microbial community structure, population dynamics, and kinetics of methanogenic populations. Archaea, 2013, 10. doi: 10.1155/2013/346171en_IE
dc.identifier.issn1472-3646
dc.identifier.urihttp://hdl.handle.net/10379/15425
dc.description.abstractThe feasibility of anaerobic digestion of dairy wastewater at 10 degrees C was investigated in a high height : diameter ratio EGSB reactor. Stable performance was observed at an applied organic loading rate (OLR) of 0.5-2 kg COD m(-3) d(-1) with chemical oxygen demand (COD) removal efficiencies above 85%. When applied OLR increased to values above 2 kg COD m(-3) d(-1), biotreatment efficiency deteriorated, with methanogenesis being the rate-limiting step. The bioreactor recovered quickly (3 days) after reduction of the OLR. qPCR results showed a reduction in the abundance of hydrogenotrophic methanogenic Methanomicrobiales and Methanobacteriales throughout the steady state period followed by a sharp increase in their numbers (111-fold) after the load shock. Specific methanogenic activity and maximum substrate utilising rate (A(max)) of the biomass at the end of trial indicated increased activity and preference towards hydrogenotrophic methanogenesis, which correlated well with the increased abundance of hydrogenotrophic methanogens. Acetoclastic Methanosaeta spp. remained at stable levels throughout the trial. However, increased apparent half-saturation constant (K-m) at the end of the trial indicated a decrease in the specific substrate affinity for acetate of the sludge, suggesting that Methanosaeta spp., which have high substrate affinity, started to be outcompeted in the reactor.en_IE
dc.description.sponsorshipThis research was carried out with the financial support of Science Foundation Ireland, through a Charles Parsons Energy Research Award (BioGen: 06/CP/E006), and an Embark Scholarship to Katarzyna Bialek, from the Irish Research Council for Science, Engineering and Technology.en_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherHindawi Publishing Corporationen_IE
dc.relation.ispartofArchaea-An International Microbiological Journalen
dc.subjectDEGREES-Cen_IE
dc.subjectACETATE OXIDATIONen_IE
dc.subjectGRANULAR SLUDGEen_IE
dc.subjectFLUIDIZED-BEDen_IE
dc.subjectSP-NOV.en_IE
dc.subjectWASTEWATERSen_IE
dc.subjectREACTORSen_IE
dc.subjectPERFORMANCEen_IE
dc.subjectBACTERIAen_IE
dc.subjectMETABOLISMen_IE
dc.titleLow-temperature (10°C) anaerobic digestion of dilute dairy wastewater in an EGSB bioreactor: microbial community structure, population dynamics, and kinetics of methanogenic populationsen_IE
dc.typeArticleen_IE
dc.date.updated2019-08-08T08:11:32Z
dc.identifier.doi10.1155/2013/346171
dc.local.publishedsourcehttp://dx.doi.org/10.1155/2013/346171en_IE
dc.description.peer-reviewedpeer-reviewed
dc.contributor.funderScience Foundation Irelanden_IE
dc.contributor.funderIrish Research Council for Science, Engineering and Technologyen_IE
dc.internal.rssid16215638
dc.local.contactVincent O'Flaherty, Dept. Of Microbiology & Eci, Arts/Science Building, Nui Galway. 3734 Email: vincent.oflaherty@nuigalway.ie
dc.local.copyrightcheckedYes
dc.local.versionPUBLISHED
dcterms.projectinfo:eu-repo/grantAgreement/SFI/Charles Parsons Energy Research Awards/06/CP/E006/IE/BioGen: Biologically Mediated Sustainable Energy GenerationThe Microbial Bioenergy (MB) Group/en_IE
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