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Lee, Changsoo
Applied Biotechnology Lab for Environment (ABLE)
Research Interests
  • Bioconversion, Bioenergy, Biogas, Biological treatment, Biorefinery, Microbial community

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Microbial community dynamics associated with biomass granulation in low-temperature (15 degrees C) anaerobic wastewater treatment bioreactors

Cited 13 times inthomson ciCited 11 times inthomson ci
Title
Microbial community dynamics associated with biomass granulation in low-temperature (15 degrees C) anaerobic wastewater treatment bioreactors
Author
O'Reilly, JoeLee, ChangsooChinalia, FabioCollins, GavinMahony, ThereseO'Flaherty, Vincent
Keywords
Anaerobic granules; DGGE; Low-temperature anaerobic digestion; Methanogens; Quantitative PCR
Issue Date
2010-08
Publisher
ELSEVIER SCI LTD
Citation
BIORESOURCE TECHNOLOGY, v.101, no.16, pp.6336 - 6344
Abstract
Granular biofilms underpin the operation of several categories of anaerobic wastewater treatment bioreactors. Recent studies have demonstrated the feasibility of treating both industrial and domestic wastewaters at their discharge temperatures (usually <18 degrees C), thereby avoiding the heating expenses of mesophilic (20-45 degrees C) or thermophilic (45-65 degrees C) treatments. Previous low-temperature trials used mesophilic inocula and little information is available on the viability of low-temperature anaerobic granulation. Six laboratory-scale, expanded granular sludge bed bioreactors (R1-6) were operated at 15 degrees C (R1-2 and R4-5) and 37 degrees C (R3 and R6). R1-3 were fed glucose-based wastewater and R4-6 were fed volatile fatty acid-based wastewater. Quantitative real-time PCR and qualitative denaturing gradient gel electrophoresis of 16S rRNA genes identified the dominance of Methanomicrobiales (mainly Methanocorpusculum-like organisms) during low-temperature granulation. Granulation only occurred in glucose-fed bioreactors. The results suggest that (i) granulation is feasible in low-temperature bioreactors: (ii) carbohydrate decomposition likely favoured granulation, (iii) Methanocorpusculum-like organisms play a critical role in low-temperature granulation.
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DOI
10.1016/j.biortech.2010.03.049
ISSN
0960-8524
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UEE_Journal Papers
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