| 潜流湿地中植物对脱氮除磷效果的影响中试研究 |
| 摘要点击 3646 全文点击 3423 投稿时间：2004-10-20 修订日期：2005-01-17 |
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| 中文关键词 潜流湿地 氮/磷 芦苇 茭草 滇池面源污染 |
| 英文关键词 sub-surface constructed wetland nitrogen/phosphorus reeds Zizania caduciflora Dianchi non-point pollution |
| DOI 10.13227/j.hjkx.20050416 |
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| 中文摘要 |
| 通过潜流湿地的中试,研究了芦苇和茭草在潜流湿地中的氮磷吸收量变化,植物收割对系统的影响以及植物对改善系统流态的作用.结果表明,依靠收割植物去除氮磷是不显著的,氮磷吸收量占去除量在5%左右.同时证明植物在进入冬季前开始出现释放氮磷现象,最佳收割期应该在9～10月份.植物对维持根系周围微生态环境起着重要的作用,收割会导致系统出水水质的波动.流态试验表明,植物根系能够改善系统的流态,植物床较空白床死区率减少5%～10%,增加系统的空间利用率,延长系统的水力停留时间. |
| 英文摘要 |
| Effects of plants on nitrogen/phosphorus removal was studied in pilot-scale in subsurface constructed wetland, the main contents included nutrient uptake、effects of harvesting and roots on hydraulic condition.The result show that the amounts of nitrogen and phosphorous removed by plant harvesting is about 5% of the total removed nutrients in SFS wetlands. The best harvesting periods is between 9～10 month every year. Plant harvesting may induce fluctuation of outflow; aboveground biomass can stabilize micro-environmental of roots. The roots can also improve hydraulic condition of SFS system, decreasing dead area 5%～10% and extending hydraulic retention time. |
