Nitrogen removal in intermittently aerated vertical flow constructed wetlands: Impact of influent COD/N ratios
Nitrogen removal in intermittently aerated vertical flow constructed wetlands: Impact of influent COD/N ratios
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DOI：
10.1016/j.biortech.2013.06.038
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发表时间：
2013-09-01
影响因子：
11.4
通讯作者：
Wu, Haiming
中科院分区：
文献类型：
--
作者：
Fan, Jinlin;Wang, Wengang;Wu, Haiming
研究了生活污水处理中八个垂直流人工湿地 (VFCW) 对不同进水 COD/N 比率和间歇曝气的性能响应。通过间歇曝气实现了几乎完全的硝化作用，充分发展了硝化和反硝化的厌氧和好氧交替条件。进水COD/N比为10，保证了充足的碳源供应，同时在间歇曝气VFCW中实现了COD（96%）、氨氮（99%）和总氮（90%）的高去除率。在所有非曝气 VFCW 中，由于缺氧，硝化作用较差，而高 COD/N 比率进一步导致 COD 和脱氮效率降低。结果表明，间歇曝气与高进水 COD/N 比相结合可以实现 VFCW 的高氮去除率。 (C) 2013 Elsevier Ltd. 保留所有权利。
The performance response of eight vertical flow constructed wetlands (VFCWs) to different influent COD/N ratios and intermittent aeration in domestic wastewater treatment was investigated. Almost complete nitrification was obtained by intermittent aeration, which well developed alternate anaerobic and aerobic conditions for nitrification and denitrification. Sufficient carbon source supply resulted from influent COD/N ratio of 10 simultaneously obtained high removals of COD (96%), ammonia nitrogen (99%) and total nitrogen (90%) in intermittently aerated VFCWs. In all non-aerated VFCWs, poor nitrification was observed due to oxygen deficiency whilst high COD/N ratios further led to lower COD and nitrogen removal efficiency. The results suggest that intermittent aeration combined with high influent COD/N ratios could achieve high nitrogen removal in VFCWs. (C) 2013 Elsevier Ltd. All rights reserved.