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Evaluation of denitrification performance and bacterial community of a sequencing batch reactor under intermittent aeration
- Title
- Evaluation of denitrification performance and bacterial community of a sequencing batch reactor under intermittent aeration
- Authors
- Kwon, Ji Hyeon; Park, Hyung-Joo; Lee, Yun-Yeong; Cho, Kyung-Suk
- Ewha Authors
- 조경숙
- SCOPUS Author ID
- 조경숙
- Issue Date
- 2020
- Journal Title
- JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
- ISSN
- 1093-4529
1532-4117
- Citation
- JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING vol. 55, no. 2, pp. 179 - 192
- Keywords
- Heterotrophic denitrification; intermittent aeration; nitrogen removal; denitrifying bacteria; sequencing batch reactor
- Publisher
- TAYLOR &
FRANCIS INC
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- 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.
- DOI
- 10.1080/10934529.2019.1681220
- Appears in Collections:
- 공과대학 > 환경공학과 > Journal papers
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