Environmental Engineering Research

  • 제24권2호
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  • Pages.309-317
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  • 2019
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  • 1226-1025(pISSN)
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  • 2005-968X(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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Kinetics of nitrification and acrylamide biodegradation by Enterobacter aerogenes and mixed culture bacteria in sequencing batch reactor wastewater treatment systems

  • Madmanang, Romsan (Environmental Science Program, Faculty of Science, Burapha University) ;
  • Jangkorn, Siriprapha (Division of Natural Resources and Environment, Faculty of Science and Social Sciences, Burapha University) ;
  • Charoenpanich, Jittima (Department of Biochemistry, Faculty of Science, Burapha University) ;
  • Sriwiriyarat, Tongchai (Department of Chemical Engineering, Faculty of Engineering, Burapha University)
  • 투고 : 2018.05.30
  • 심사 : 2018.08.07
  • 발행 : 2019.12.27
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초록

This study evaluated the kinetics of acrylamide (AM) biodegradation by mixed culture bacteria and Enterobacter aerogenes (E. aerogenes) in sequencing batch reactor (SBR) systems with AQUASIM and linear regression. The zero-order, first-order, and Monod kinetic models were used to evaluate the kinetic parameters of both autotrophic and heterotrophic nitrifications and both AM and chemical oxygen demand (COD) removals at different AM concentrations of 100, 200, 300, and 400 mg AM/L. The results revealed that both autotrophic and heterotrophic nitrifications and both AM and COD removals followed the Monod kinetics. High AM loadings resulted in the transformation of Monod kinetics to the first-order reaction for AM and COD removals as the results of the compositions of mixed substrates and the inhibition of the free ammonia nitrogen (FAN). The kinetic parameters indicated that E. aerogenes degraded AM and COD at higher rates than mixed culture bacteria. The FAN from the AM biodegradation increased both heterotrophic and autotrophic nitrification rates at the AM concentrations of 100-300 mg AM/L. At higher AM concentrations, the FAN accumulated in the SBR system inhibited the autotrophic nitrification of mixed culture bacteria. The accumulation of intracellular polyphosphate caused the heterotrophic nitrification of E. aerogenes to follow the first-order approximation.

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참고문헌

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피인용 문헌

  1. Selectively enriched mixed sulfate-reducing bacteria for acrylamide biodegradation vol.17, pp.12, 2020, https://doi.org/10.1007/s13762-020-02819-5