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| 论文编号: |
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| 论文题目: |
Optimal influent COD/N ratio for obtaining low GHG emissions and high pollutant removal efficiency in constructed wetlands |
| 英文论文题目: |
Optimal influent COD/N ratio for obtaining low GHG emissions and high pollutant removal efficiency in constructed wetlands |
| 第一作者: |
陈欣 |
| 英文第一作者: |
Chen, X |
| 联系作者: |
祝惠 |
| 英文联系作者: |
Zhu, Hui |
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| 发表年度: |
2020 |
| 卷: |
267 |
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| 摘要: |
Influent chemical oxygen demand (COD)/nitrogen (N) ratio plays a crucial role in the biogeochemical cycle of carbon and N in constructed wetlands (CWs). This study evaluated the greenhouse gas (GHG) emissions, pollutant removal efficiency and specific microbial gene abundances in subsurface flow CWs (SSFCWs) under various influent COD/N ratios. The GHG emissions and pollutant removal efficiency were markedly affected by influent COD/N ratios. The effluent concentrations of nitrate decreased with the increase of influent COD/N ratios, while the trend was completely reversed for COD. The lowest effluent total nitrogen concentration was observed with a COD/N ratio of 10. For GHG emissions, the CO2?fluxes increased with increasing influent COD/N ratios. However, the lowest CH4?(- 42.49?μg/m2/h) and N2O fluxes (31.77?μg/m2/h) were both observed under a COD/N ratio of 10. A significantly positive correlation between N2O fluxes and abundance of?nirS and (nirS?+?nirK) (r2?=?0.64 and 0.61,?p? |
| 英文摘要: |
Influent chemical oxygen demand (COD)/nitrogen (N) ratio plays a crucial role in the biogeochemical cycle of carbon and N in constructed wetlands (CWs). This study evaluated the greenhouse gas (GHG) emissions, pollutant removal efficiency and specific microbial gene abundances in subsurface flow CWs (SSFCWs) under various influent COD/N ratios. The GHG emissions and pollutant removal efficiency were markedly affected by influent COD/N ratios. The effluent concentrations of nitrate decreased with the increase of influent COD/N ratios, while the trend was completely reversed for COD. The lowest effluent total nitrogen concentration was observed with a COD/N ratio of 10. For GHG emissions, the CO2?fluxes increased with increasing influent COD/N ratios. However, the lowest CH4?(- 42.49?μg/m2/h) and N2O fluxes (31.77?μg/m2/h) were both observed under a COD/N ratio of 10. A significantly positive correlation between N2O fluxes and abundance of?nirS and (nirS?+?nirK) (r2?=?0.64 and 0.61,?p? |
| 刊物名称: |
JOURNAL OF CLEANER PRODUCTION |
| 英文刊物名称: |
JOURNAL OF CLEANER PRODUCTION |
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| 参与作者: |
Yan, Baixing；Shutes, Brian；Tian, Liping；Wen, Huiyang |
| 英文参与作者: |
Yan, Baixing；Shutes, Brian；Tian, Liping；Wen, Huiyang |
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