Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evaluation of denitrification performance and bacterial community of a sequencing batch reactor under intermittent aeration
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.
Evaluation of denitrification performance and bacterial community of a sequencing batch reactor under intermittent aeration
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.
Evaluation of denitrification performance and bacterial community of a sequencing batch reactor under intermittent aeration
Kwon, Ji Hyeon (Autor:in) / Park, Hyung-Joo (Autor:in) / Lee, Yun-Yeong (Autor:in) / Cho, Kyung-Suk (Autor:in)
Journal of Environmental Science and Health, Part A ; 55 ; 179-192
28.01.2020
14 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Autotrophic denitrification with sulphide in a sequencing batch reactor
| Online Contents | 2012