PMID- 16180411 OWN - NLM STAT- MEDLINE DCOM- 20051108 LR - 20220317 IS - 0273-1223 (Print) IS - 0273-1223 (Linking) VI - 52 IP - 1-2 DP - 2005 TI - Microbial characteristics of a methanogenic phenol-degrading sludge. PG - 73-8 AB - Microbial properties of a methanogenic granular phenol-degrading sludge were characterized using the 16S rRNA/DNA-based techniques, including polymerase chain reaction (PCR) amplification, cloning, DNA sequencing, and fluorescence in situ hybridization (FISH). The sludge was sampled from an upflow anaerobic sludge blanket reactor, which removed 98% of phenol (up to 1260 mg/l) in wastewater at 26 degrees C with 12 hours of hydraulic retention. Based on DNA analysis, the Eubacteria in the sludge was composed of 13 operational taxonomy units (OTUs). Two OTUs, one resembling Clostridium and the other remotely resembling Desulfotomaculum, were likely responsible for the conversion of phenol to benzoate, which was further degraded by five Syntrophus-resembling OTUs to acetate and H2/CO2; methanogens lastly converted acetate and H2/CO2 into methane. The role of six remaining OTUs remains unclear. Overall, the sludge was composed of 26 +/- 6% Eubacteria and 74 +/- 9% methanogens, of which 54 +/- 6% were acetotrophic Methanosaetaceae, 14 +/- 3% and 3 +/- 2% were hydrogenotrophic Methanomicrobiales and Methanobacteriaceae, respectively. FAU - Zhang, T AU - Zhang T AD - Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China. hrechef@hkucc.hku.hk FAU - Ke, S Z AU - Ke SZ FAU - Liu, Y AU - Liu Y FAU - Fang, H P AU - Fang HP LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Water Sci Technol JT - Water science and technology : a journal of the International Association on Water Pollution Research JID - 9879497 RN - 0 (DNA, Archaeal) RN - 0 (DNA, Bacterial) RN - 0 (RNA, Ribosomal, 16S) RN - 0 (Sewage) RN - 339NCG44TV (Phenol) RN - OP0UW79H66 (Methane) SB - IM MH - Bacteria/classification/genetics/*isolation & purification/metabolism MH - Bacteria, Anaerobic/classification/genetics/*isolation & purification/metabolism MH - Base Sequence MH - Biodegradation, Environmental MH - Bioreactors MH - DNA, Archaeal/analysis MH - DNA, Bacterial/analysis MH - Euryarchaeota/classification/genetics/*isolation & purification/metabolism MH - In Situ Hybridization, Fluorescence MH - Methane/metabolism MH - Phenol/*metabolism MH - RNA, Ribosomal, 16S/analysis MH - Sequence Analysis, DNA MH - Sewage/*microbiology EDAT- 2005/09/27 09:00 MHDA- 2005/11/09 09:00 CRDT- 2005/09/27 09:00 PHST- 2005/09/27 09:00 [pubmed] PHST- 2005/11/09 09:00 [medline] PHST- 2005/09/27 09:00 [entrez] PST - ppublish SO - Water Sci Technol. 2005;52(1-2):73-8.