| 复合垂直流人工湿地污水处理系统硝化与反硝化作用 |
| 摘要点击 4298 全文点击 4646 投稿时间：2004-01-13 修订日期：2004-03-28 |
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| 中文关键词 复合垂直流人工湿地 硝化作用 反硝化作用 硝化菌 反硝化菌 |
| 英文关键词 integrated vertical flow constructed wetland nitrification denitrification nitrifying bacteria denitrifying bacteria |
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| 中文摘要 |
| 研究了复合垂直流人工湿地各基质层的硝化与反硝化菌数量以及硝化与反硝化作用强度.结果表明,基质中硝化菌数量为7.5×103～1.1×105MPN·g-1,反硝化菌数量为7.5×106～1.1×107 MPN·g-1.硝化作用强度为0.01～6.35μg·(g·d)-1,反硝化作用强度为3.37～4.19μg·(g·d)-1.沿水流方向硝化菌数量和硝化作用强度明显降低,其变化趋势呈显著正相关(r=0.9661,p＜0.001).反硝化菌数量和反硝化作用强度比较稳定,沿水流方向略有上升,其变化趋势呈显著正相关(r=0.7722,p＜0.025).沿水流方向,硝化作用与反硝化作用强度变化呈显著负相关(r=-0.9776,p＜0.001),这与人工湿地的溶氧状况和污水中氨氮含量较高相一致.
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| 英文摘要 |
| Nitrification and denitrification in the different layers of the integrated vertical flow constructed wetlands (IVCW) are studied. The results show the constants rate of nitrification and denitrification in the strata of IVCW were 0.01～6.35μg·(g·d)-1 and 3.37～4.19μg·(g·d)-1 respectively. The most probable number (MPN) method are employed to determine the number and distribution of nitrifying and denitrifying bacteria in the strata of the system. The results show that the numbers of nitrifying and denitrifying bacteria were 7.5×103～1.1×105 MPN·g-1 and 7.5×106～1.1×107 MPN·g-1 respectively. The positive correlation between bacteria and their action was obvious (r=0.9661,p<0.001, r=0.7722,p<0.025). It is also observed that the number of nitrifying bacteria and nitrification rate was decreased along the direction of the water in the IVCW, while denitrifying bacteria and denitrification rate was increased. And there was the significant negative correlation between nitrification and denitrification rate(r=-0.9776, p<0.001). |
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