| 潜流构造湿地去除农田排水中氮的研究 |
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| 引用本文： | 张荣社,周琪,张建,史云鹏.潜流构造湿地去除农田排水中氮的研究[J].环境科学,2003,24(1):113-116. |
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| 作者姓名： | 张荣社 周琪 张建 史云鹏 |
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| 作者单位： | 1. 同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室,上海,200092,E-mail:zhrs555@slna.com
2. 清华大学环境科学与工程系,北京,100084 |
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| 基金项目： | 国家"十五"科技攻关项目(K99-05-35-02) |
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| 摘 要： | 对潜流构造湿地处理农业面源污水的脱氮效果进行了中试研究.研究证明潜流湿地氮去除效率和水力停留时间呈正相关关系,芦苇床的脱氮效果明显好于茭草床和空白床,名义水力停留时间大于5d时,芦苇、茭草潜流湿地脱氮效率可以达到60%以上.氮的去除满足一级推流反应动力学关系,空白床、芦苇床和茭草床的一级反应动力学常数K分别为0.14、0.26和0.20d-.微生物的反硝化是人工湿地脱氮的主要途径,植物吸收总氮量仅占入水量的15%左右.
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| 关 键 词： | 潜流湿地 农业面源污染 脱氮 反硝化 |
| 文章编号： | 0250-3301(2003)01-04-0113 |
| 收稿时间： | 2002/3/27 0:00:00 |
| 修稿时间： | 6/5/2002 12:00:00 AM |
Study on Nitrogen Removal Treating Agriculture Wastewater in Subsurface Constructed Wetland |
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| Zhang Rongshe,Zhou Qi,Zhang Jian and Shi Yunpeng.Study on Nitrogen Removal Treating Agriculture Wastewater in Subsurface Constructed Wetland[J].Chinese Journal of Environmental Science,2003,24(1):113-116. |
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| Authors: | Zhang Rongshe Zhou Qi Zhang Jian and Shi Yunpeng |
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| Institution: | Pollution Control and Resource Reuse Lab, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. zhrs555@sina.com |
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| Abstract: | Nitrogen removal in subsurface constructed wetland treating agriculture non-pointed wastewater was studied in pilot-scale. The experimental results showed that the removal rates of TN increases with HRT increasing. The removal rates of TN achieved 60% in macrophyte bed system when the nominal hydraulic retention time was 5 days. Removal of TN followed first-order plug flow kinetics. Rate constant of Non-plant bed, Phragmitas communis bed and Zizania caduciflora bed was 0.14, 0.26 and 0.20 d-1 respectively. Denitrification was the main removal mechanism of total nitrogen, the amount of TN that can be removed by harvesting were above 15% compared to the loading into constructed wetland system. |
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| Keywords: | subsurface constructed wetland agriculture non-point pollution nitrogen denitrification |
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