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Structure and dynamics of microbial community in full-scale activated sludge reactors

  • Original Paper
  • Published:
Journal of Industrial Microbiology & Biotechnology

Abstract

Phospholipid fatty acid (PLFA) profiles in four full-scale activated sludge reactors (ASR1 ~ 4) treating municipal wastewater, South Korea, were monitored to evaluate the influence of influent water quality on microbial community structure (MCS) and the effect of the MCS on effluent water quality. In ASR1 ~ 3, PLFA profiles were very similar, regardless of the influent water quality and seasonal differences, and 16:17c/15:0iso2OH and 16:0 were dominant. PLFA profiles in ASR4 during summer and autumn were very similar to those in ASR1 ~ 3, but increases in specific fatty acids, 16:1ω5c, 11methyl18:1ω7c and 15:0iso3OH, were found in ASR4 during winter and spring, with relatively high total suspended solid (TSS) concentrations in the effluent. 16:1ω5c and 15:0iso3OH, possibly related with Flexibacter sp., caused a bulking problem in the activated sludge. The community diversity indices such as Shannon diversity and equability decreased in summer but increased in autumn in all the ASRs. Canonical correspondence analysis results suggested that the influent BOD concentration played the most important role in changing MCS, followed by influent TSS concentration. In addition, the TSS and total phosphorus concentrations in the effluent were significantly affected by the change of the MCS.

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Acknowledgments

This study was supported by an RP-Grant 2009 from Ewha Womans University. The authors appreciate the government of Seoul City, South Korea, for supporting the influent and effluent water quality information of WWPTs.

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Authors and Affiliations

  1. Department of Environmental Science and Engineering, Ewha Womans University, 11-1 Daehyun-dong, Seodaemun-gu, Seoul, 120-750, South Korea

    Taewoo Yi, Eun-Hee Lee, Shinyoung Kang, Jikyung Shin & Kyung-Suk Cho

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  1. Taewoo Yi
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  2. Eun-Hee Lee
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  3. Shinyoung Kang
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  4. Jikyung Shin
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Correspondence to Kyung-Suk Cho.

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Yi, T., Lee, EH., Kang, S. et al. Structure and dynamics of microbial community in full-scale activated sludge reactors. J Ind Microbiol Biotechnol 39, 19–25 (2012). https://doi.org/10.1007/s10295-011-0994-8

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  • DOI: https://doi.org/10.1007/s10295-011-0994-8

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