Evaluation of denitrification performance and bacterial community of a sequencing batch reactor under intermittent aeration
- 주제(키워드) Heterotrophic denitrification , intermittent aeration , nitrogen removal , denitrifying bacteria , sequencing batch reactor
- 주제(기타) Engineering, Environmental
- 주제(기타) Environmental Sciences
- 설명문(일반) [Kwon, Ji Hyeon; Park, Hyung-Joo; Lee, Yun-Yeong; Cho, Kyung-Suk] Ewha Womans Univ, Dept Environm Sci & Engn, 52 Ewhayeodae Gil, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 TAYLOR & FRANCIS INC
- 발행년도 2020
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000172038
- 본문언어 영어
- Published As https://dx.doi.org/10.1080/10934529.2019.1681220
- PubMed https://pubmed.ncbi.nlm.nih.gov/31656118
초록/요약
Effects of operational parameters (initial nitrite concentration, initial nitrate concentration, carbon source, and COD/N ratio) on denitrification performance was evaluated using a sequencing batch reactor (SBR) under intermittent aeration. Complete denitrification was observed without N2O accumulation when the initial nitrite concentration was 100-500 mg-N center dot L-1. When the initial nitrate concentration was 75-300 mg-N center dot L-1, 95-96% of NO3--N was completely reduced to N-2 gas. Acetate was the most effective sole carbon source for the complete denitrification of the SBR under intermittent aeration, and 99% of NO3--N was reduced to N-2 gas. The optimum COD/N ratio was 8-12 for the complete denitrification, while NO2- accumulation was observed at low COD/N ratios of 1 and 2. In this study, N2O accumulation was not observed during the denitrification process regardless of operational condition. Paracoccus (15-68%), a representative aerobic denitrifying bacterium, was dominant in the SBR during the denitrification process, and the intermittent aeration condition could affect the abundance of Paracoccus in this study.
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