Monitoring the microbial community shift throughout the shock changes of hydraulic retention time in an anaerobic moving bed membrane bioreactor

Title
Monitoring the microbial community shift throughout the shock changes of hydraulic retention time in an anaerobic moving bed membrane bioreactor
Authors
Theint Theint Win김혜민조강우송경근Joonhong Park
Keywords
AnMBMBR; PCR?DGGE; Biogas; HRT shock; Microbial community
Issue Date
2016-02
Publisher
Bioresource technology
Citation
VOL 202, 125-132
Abstract
An anaerobic moving bed membrane bioreactor (AnMBMBR) fed with synthetic domestic wastewater was investigated under hydraulic retention time (HRT) shocks to assess the effects on the microbial (bacteria and archaea) community and reactor performance. 16S rDNA targeted polymerase chain reaction–denaturing gradient gel electrophoresis (PCR–DGGE) approach was optimized to relate the metabolic and community composition with biogas generation, methane content and COD removal efficiency. From the drastic decrease of HRT (from 8 h to 4 h), the methane production was significantly reduced due to the HRT shock, while the COD removal efficiency was not affected. The enhanced growth of homoacetogenic bacteria, Thermoanaerobacteraceae competes with methanogens under shock period. When the HRT was recovered to 8 h, the methane generation rate was higher than the initial operation before the shock HRT changes, which would be ascribed to the activity of new emerging hydrogenotrophic archaea, Methanocella sp. and Methanofollis sp.
URI
http://pubs.kist.re.kr/handle/201004/58345
ISSN
09608524
Appears in Collections:
KIST Publication > Article
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