TY - JOUR
T1 - Evaluation of denitrification performance and bacterial community of a sequencing batch reactor under intermittent aeration
AU - Kwon, Ji Hyeon
AU - Park, Hyung Joo
AU - Lee, Yun Yeong
AU - Cho, Kyung Suk
N1 - Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2016R1A2B4015007).
Publisher Copyright:
© 2019, © 2019 Taylor & Francis Group, LLC.
PY - 2020/1/28
Y1 - 2020/1/28
N2 - 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·L−1. When the initial nitrate concentration was 75–300 mg-N·L−1, 95–96% of NO3 −-N was completely reduced to N2 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 N2 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.
AB - 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·L−1. When the initial nitrate concentration was 75–300 mg-N·L−1, 95–96% of NO3 −-N was completely reduced to N2 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 N2 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.
KW - denitrifying bacteria
KW - Heterotrophic denitrification
KW - intermittent aeration
KW - nitrogen removal
KW - sequencing batch reactor
UR - http://www.scopus.com/inward/record.url?scp=85076495694&partnerID=8YFLogxK
U2 - 10.1080/10934529.2019.1681220
DO - 10.1080/10934529.2019.1681220
M3 - Article
C2 - 31656118
AN - SCOPUS:85076495694
SN - 1093-4529
VL - 55
SP - 179
EP - 192
JO - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
JF - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
IS - 2
ER -