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 |
| |
| Affiliation: | 1. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China; 2. School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China; 3. School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China |
| |
| 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: | anaerobic-aerobic (low dissolved oxygen) nitrous oxide (N2O) emitting rate municipal wastewater waste activated sludge alkaline fermentation liquid |
| 本文献已被 SpringerLink 等数据库收录！ |
| 点击此处可从《Frontiers of Environmental Science & Engineering》浏览原始摘要信息 |
|
点击此处可从《Frontiers of Environmental Science & Engineering》下载全文 |
|
