Possibility of Anoxic Phosphorus Removal by Denitrifier in Denitrifying EBPR System

생물학적 질소.인 동시제거 시스템에서 탈질미생물의 인 제거 가능성

  • Lee, Hansaem (Research Institute for Environmental Technology and Sustainable Development, Korea University) ;
  • Yun, Zuwhan (Department of Environmental System Engineering, Korea University)
  • 이한샘 (고려대학교 환경기술정책연구소) ;
  • 윤주환 (고려대학교 환경시스템공학과)
  • Received : 2013.08.16
  • Accepted : 2013.11.12
  • Published : 2013.11.30

Abstract

Enhanced biological phosphorus removal (EBPR) behavior and microbial characteristics in the anaerobic-aerobic SBR (PAO SBR) and the anaerobic-anoxic SBR (DPAO SBR) were examined in this research. For 392 days of operation, both SBRs have exhibited a good EBPR (or denitrifying EBPR) performance. $P_{release}/P_{influent}$ ratio was highest in both reactors after the stabilization, while the efficiency of phosphorus removal was decreased since the sludge granulation has been visually observed within the reactor. The comparative analysis of Pyrosequencing-based microbial population between PAO and DPAO sludges showed indirectly that Dechloromonas spp. could utilize $O_2$ and $NO_3{^-}-N$ as an electron acceptor and Accumulibacter phosphatis use only $O_2$ in EBPR system. Also, we concluded that Thauera spp. as a denitrifier contribute significantly to the anoxic phosphorus removal in the DPAO system.

Keywords

Acknowledgement

Supported by : 한국연구재단

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