Effect of the addition of organic carbon sources on nitrous oxide emission in anaerobic-aerobic (low dissolved oxygen) sequencing batch reactors |
| |
Authors: | Hongjing LI Xiurong CHEN Yinguang CHEN |
| |
Institution: | (1) School of Environmental Engineering, Municipal Faculty “Prof. Franco Montoro”, SP, Brazil;(2) School of Food Engineering, Educational Foundation of Barretos (UNIFEB), SP, Brazil;(3) Food Engineering Department, School of Food Engineering, State University of Campinas (UNICAMP), PO Box 6121, Campinas, SP, 13083-970, Brazil; |
| |
Abstract: | The effect of additional organic carbon sources on the production of nitrous oxide (N2O) in anaerobic-aerobic (low dissolved oxygen) real wastewater treatment system was investigated. In this paper, three laboratory-scale
sequencing batch reactors (SBRs) (SBR-1, SBR-2 and SBR-3) were operating under an anaerobic-aerobic (low dissolved oxygen,
0.15–0.45 mg·L−1) configuration. The SBRs were ‘long-term cultured’ respectively with a single municipal wastewater sample, sodium acetate,
and a waste-activated sludge alkaline fermentation liquid as the additional carbon sources of real wastewater. Off-gas analysis
showed that N2O was emitted into the atmosphere during the aerobic (low dissolved oxygen) period in the three SBRs, and the order of N2O emission rate was SBR-2>SBR-1>SBR-3. It was observed that the higher poly-β-hydroxyvalerate fraction of polyhydroxyalkanoates,
the lower glycogen transformation and less nitrite accumulation was in SBR-3, while the opposite behavior was observed in
SBR-2. Further research indicated that the interaction of the factors above potentially affected the N2O emission in the anaerobic-aerobic (low dissolved oxygen) system. |
| |
Keywords: | |
本文献已被 万方数据 SpringerLink 等数据库收录! |
|