| 添加碳源对潜流+表面流组合湿地脱氮除磷的影响 |
| 摘要点击 2769 全文点击 2001 投稿时间：2006-06-12 修订日期：2006-09-21 |
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| 中文关键词 表面流湿地 潜流湿地 脱氮除磷 碳源 |
| 英文关键词 free water surface wetland subsurface flow wetland nitrogen and phosphorus removal carbon source |
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| 中文摘要 |
| 采用向ANOXIC-OXIC（A/O）工艺出水中添加城市污水的方法，在中试规模上研究了外加碳源对潜流+表面流组合湿地脱氮除磷的影响.结果表明，直接处理A/O工艺出水时（工况Ⅰ），湿地进水COD/TN仅为1.00，(NO-2+NO-3)/TN为0.48，COD、TN和TP的面积负荷去除率分别为1.82、1.59、0.14 g·(m2·d)-1.A/O工艺出水中添加少量城市污水后（工况Ⅱ），湿地进水COD/TN为3.55，(NO-2+NO-3)/TN为0.44，COD、TN和TP的面积负荷去除率分别为19.03、5.42、0.29 g·(m2·d)-1.工况Ⅱ的TN和TP面积负荷去除率分别比工况Ⅰ提高了3.4倍和2.1倍.HRT、水温、(NO-2+NO-3)/TN和COD/TN对湿地脱氮除磷效能有显著影响，在HRT为0.5～1.0d， COD、TN和TP的面积负荷率分别为3.8～38.7、5.07～13.08、0.57～1.92 g·(m2·d)-1时， TN面积负荷去除率随HRT增加而指数下降，随水温和(NO-2+NO-3)/TN的升高而线性增加，随COD/TN的增加呈幂函数增加.TP面积负荷去除率随COD/TN的增加呈幂函数增加. |
| 英文摘要 |
| By adding municipal wastewater in effluent of ANOXIC-OXIC (A/O) reactor as external carbon source, effects of external carbon source on nitrogen and phosphorus removal in subsurface flow and free water surface integrated constructed wetland were studied in pilot-scale. Results indicate that, COD/TN and (NO-2+NO-3)/TN in influent of wetland are 1.00 and 0.48, respectively, and load removal rates of COD, TN and TP are 1.82, 1.59 and 0.14 g·(m2·d)-1, respectively, as directly treating effluent of A/O reactor in wetland (working conditionⅠ). COD/TN and (NO-2+NO-3)/TN in influent of wetland are 3.55 and 0.44, respectively, and load removal rates of COD, TN and TP are 19.03, 5.42 and 0.29 g·(m2·d)-1, respectively, as adding municipal wastewater in effluent of A/O reactor as external carbon source in wetland (working conditionⅡ). Compared with working conditionⅠ, load removal rates of TN and TP for working condition Ⅱ increase 3.4 times and 2.1 times, respectively. Impact factors of load removal rate of TN and TP are water temperature, HRT, COD/TN and (NO-2+NO-3)/TN, respectively, when ranges of influent load rates are 3.8～38.7 g·(m2·d)-1 for COD, 5.07～13.08 g·(m2·d)-1 for TN and 0.57～1.92 g·(m2·d)-1 for TP, respectively, and range of HRT is 0.5～1.0 d. TN load removal rate decreases by exponent function along with increase of HRT, linearly increases along with increase of water temperature and (NO-2+NO-3)/TN, and increases by power function along with increase of COD/TN. TP load removal rate also increases by power function along with increase of COD/TN. |
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