| 好氧/厌氧多级串联潜流人工湿地脱氮效果 |
| 摘要点击 3363 全文点击 2595 投稿时间：2010-02-03 修订日期：2010-05-05 |
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| 中文关键词 曝气 溶解氧 好氧/厌氧串联 硝化 脱氮率 |
| 英文关键词 aeration dissolved oxygen aerobic/anaerobic nitrification removal efficiency of nitrogen |
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| 中文摘要 |
| 为了调整传统潜流湿地内部溶解氧分布状态，提高其对生活污水水质净化的效率，对传统潜流湿地进行了不同区段的划分及功能强化，设计了不同结构的好氧/厌氧多级串联潜流人工湿地，研究了好氧/厌氧段比例、位置及人工曝气等因素对脱氮效率的影响，并与传统潜流湿地进行净化效果的比较.结果表明，传统潜流湿地对NH+4-N和TN的去除率分别为18.4%和40.6%，以好氧/厌氧/好氧段方式串联采用前部和后部曝气并作厌氧处理的潜流湿地 (即O-A-O强化曝气SFCWs)分别为99.7%和50.7%； O-A-O强化曝气SFCWs对NH+4-N的去除率为100%，O-A-O不曝气SFCWs为50%左右；在湿地前部、中部和后部曝气对NH+4-N的去除率分别提高82.81%、 73.16%和17.91%.可见，在实验条件下曝气能显著提高湿地的脱氮效率，尤其是NH+4-N的去除率；在湿地不同位置曝气均能不同程度提高脱氮效率，在湿地前段和后段曝气的O-A-O强化曝气SFCWs能最大程度的提高NH+4-N和TN的去除率；但是曝气产生的富氧环境不利于反硝化反应的顺利进行，反硝化作用不充分是限制TN去除率的重要因素. |
| 英文摘要 |
| In order to adjust the dissolved oxygen in the traditional subsurface flow constructed wetlands (SFCWs) and increase the purification efficiency of sewage water, the traditional SFCWs were divided into different sections with enhanced functions. Different kinds of aerobic/anaerobic SFCWs were designed to study the influence of ratio and location of aerobic/anaerobic, artificial aeration and other factors on the nitrogen in effluent. The purification efficiency of the water in this study was compared with that in traditional SFCWs. The results showed that the removal efficiencies of NH+4-N and TN in traditional SFCWs were 18.4% and 40.6% but 99.7% and 50.7%in aerobic/anaerobic/aerobic SFCWs with aeration (O-A-O SFCWs with aeration) treatment. Aeration in the front and in the rear, and anaerobic treatment in the middle was used in this treatment. Removal efficiency of NH+4-N in O-A-O SFCWs with aeration treatment was 100%, while that of O-A-O SFCWs without aeration was about 50%. The removal efficiencies of NH+4-N in new SFCWs with aeration in the front and in the rear were increased by 82.81% and 17.91% but 73.16% in the middle. It shows that aeration can significantly improve the removal efficiency of nitrogen，especially NH+4-N. Aeration in the front and back can greatly improve the removal efficiency NH+4-N and TN. But aeration resulting to oxygen-rich environment is not conducive to the denitrification，which will be an important factor of limiting the TN removal efficiency. |
