PMID- 19108975 OWN - NLM STAT- MEDLINE DCOM- 20090318 LR - 20131121 IS - 0723-2020 (Print) IS - 0723-2020 (Linking) VI - 32 IP - 1 DP - 2009 Feb TI - Effect of seed sludge and operation conditions on performance and archaeal community structure of low-temperature anaerobic solvent-degrading bioreactors. PG - 65-79 LID - 10.1016/j.syapm.2008.10.003 [doi] AB - Two laboratory-scale expanded granular sludge bed (EGSB) anaerobic bioreactors (R1 and R2) were inoculated with biomass from different mesophilic (37 degrees C) treatment plants, and used for the treatment of an organic solvent-based wastewater at 9-14 degrees C at applied organic loading rates (OLRs) of 1.2-3.6kg chemical oxygen demand (COD)m(-3)d(-1). Replicated treatment performance was observed at 10-14 degrees C, which suggested the feasibility of the process at pilot-scale. Stable and efficient COD removal, along with high methane productivity, was demonstrated at 9 degrees C at an applied OLR of 2.4kgCODm(-3)d(-1). Clonal libraries and fluorescence in situ hybridization (FISH) indicated that the seed sludges were dominated (>60%) by acetoclastic Methanosaeta-like organisms. Specific methanogenic activity (SMA) profiles indicated shifts in the physiological profiles of R1 and R2 biomass, including the development of psychrotolerant methanogenic activity. Acetoclastic methanogenesis represented the primary route of methane production in R1 and R2, which is in contrast with several previous reports from low-temperature bioreactor trials. A reduction in the abundance of Methanosaeta-like clones (R2), along with the detection of hydrogenotrophic methanogenic species, coincided with altered granule (sludge) morphology and the development of hydrogenotrophic SMA after prolonged operation at 9 degrees C. FAU - Enright, Anne-Marie AU - Enright AM AD - Microbial Ecology Laboratory, Department of Microbiology and Environmental Change Institute (ECI), National University of Ireland, Galway (NUI, Galway), University Road, Galway, Ireland. FAU - McGrath, Vincent AU - McGrath V FAU - Gill, Darryl AU - Gill D FAU - Collins, Gavin AU - Collins G FAU - O'Flaherty, Vincent AU - O'Flaherty V LA - eng SI - GENBANK/DQ399813 SI - GENBANK/DQ399814 SI - GENBANK/DQ399815 SI - GENBANK/DQ399816 SI - GENBANK/DQ399817 SI - GENBANK/DQ462726 SI - GENBANK/DQ462727 SI - GENBANK/DQ462728 SI - GENBANK/DQ462729 SI - GENBANK/DQ462730 SI - GENBANK/DQ462731 SI - GENBANK/DQ679903 PT - Journal Article DEP - 20081223 PL - Germany TA - Syst Appl Microbiol JT - Systematic and applied microbiology JID - 8306133 RN - 0 (DNA, Archaeal) RN - 0 (RNA, Ribosomal, 16S) RN - 0 (Sewage) RN - 0 (Solvents) RN - OP0UW79H66 (Methane) SB - IM MH - Anaerobiosis MH - Archaea/classification/genetics/*growth & development/metabolism MH - *Bioreactors MH - Biotechnology MH - DNA, Archaeal/analysis MH - Drug Industry MH - *Ecosystem MH - In Situ Hybridization, Fluorescence MH - Methane/biosynthesis MH - Methanosarcinales/classification/genetics/growth & development/metabolism MH - Molecular Sequence Data MH - Polymorphism, Restriction Fragment Length MH - RNA, Ribosomal, 16S/genetics MH - Sequence Analysis, DNA MH - Sewage/*microbiology MH - Solvents/chemistry/*metabolism MH - *Temperature MH - Waste Disposal, Fluid/methods EDAT- 2008/12/26 09:00 MHDA- 2009/03/19 09:00 CRDT- 2008/12/26 09:00 PHST- 2008/07/07 00:00 [received] PHST- 2008/10/25 00:00 [revised] PHST- 2008/10/31 00:00 [accepted] PHST- 2008/12/26 09:00 [entrez] PHST- 2008/12/26 09:00 [pubmed] PHST- 2009/03/19 09:00 [medline] AID - S0723-2020(08)00126-4 [pii] AID - 10.1016/j.syapm.2008.10.003 [doi] PST - ppublish SO - Syst Appl Microbiol. 2009 Feb;32(1):65-79. doi: 10.1016/j.syapm.2008.10.003. Epub 2008 Dec 23.