Show simple item record

dc.contributor.authorO'Reilly, Caroline
dc.contributor.authorColleran, Emer
dc.date.accessioned2018-08-24T08:26:00Z
dc.date.available2018-08-24T08:26:00Z
dc.date.issued2006-04-01
dc.identifier.citationO'Reilly, Caroline; Colleran, Emer (2006). Effect of influent cod/so42â ratios on mesophilic anaerobic reactor biomass populations: physico-chemical and microbiological properties. FEMS Microbiology Ecology 56 (1), 141-153
dc.identifier.issn0168-6496,1574-6941
dc.identifier.urihttp://hdl.handle.net/10379/9690
dc.description.abstractThe competitive and syntrophic interactions between different anaerobic bacterial trophic groups in sulphate limited expanded granular sludge bed (EGSB) reactors was investigated. The outcome of competition between the sulphate-reducing, methanogenic and syntrophic populations after development in reactors at varying influent COD/SO42- ratios was examined in batch activity tests with the inclusion of specific sulphate reducing bacteria (SRB) and methane producing archaea (MPA) inhibitors. SRB species could not out-compete MPA species for acetate at influent COD/SO42- ratios as low as 2. The SRB were seen to play a more significant role in the conversion of hydrogen but did not become completely dominant. HMPA were responsible for hydrogen utilization at an influent COD/SO42- ratio of 16, and were still dominant when the ratio was reduced to 4. It was only when the COD/SO42- ratio was reduced to 2 that the HSRB assumed a more influential role. SRB species were significant in the degradation of propionate at all COD/SO42- ratios applied. Sludge samples were analysed by scanning electron microscopy (SEM), granule size distribution and fluorescent in situ hybridization (FISH), combined with confocal laser scanning microscopy (CLSM), to monitor any changes in granule morphology under the various COD/SO42- ratios imposed during the reactor trial. In situ hybridization with domain- and species-specific oligonucleotide probes demonstrated a layered architecture with an outer layer harboring mainly Eubacterial cells and an inner layer dominated by Archaeal species.
dc.publisherOxford University Press (OUP)
dc.relation.ispartofFEMS Microbiology Ecology
dc.subjectanaerobic
dc.subjectmethane producing archaea (mpa)
dc.subjectsulphate reducing bacteria (srb)
dc.subjectcod/so42- ratio
dc.subjectcompetition
dc.subjectfluorescent in situ hybridization (fish)
dc.subjectsulfate-reducing bacteria
dc.subjectmethane-producing bacteria
dc.subjecttargeted oligonucleotide probes
dc.subjectgranular sludge reactor
dc.subjectproduction waste-water
dc.subjectlong-term competition
dc.subjectin-situ hybridization
dc.subjectfull-scale
dc.subjectmicrobial community
dc.subjectblanket reactors
dc.titleEffect of influent cod/so42â ratios on mesophilic anaerobic reactor biomass populations: physico-chemical and microbiological properties
dc.typeArticle
dc.identifier.doi10.1111/j.1574-6941.2006.00066.x
dc.local.publishedsourcehttps://academic.oup.com/femsec/article-pdf/56/1/141/18101018/56-1-141.pdf
nui.item.downloads0


Files in this item

This item appears in the following Collection(s)

Show simple item record