| 湿地植物在不同水力条件下对中水的净化效果 |
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| 引用本文： | 胡碧莹,王海洋.湿地植物在不同水力条件下对中水的净化效果[J].安徽农业科学,2017,45(8). |
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| 作者姓名： | 胡碧莹 王海洋 |
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| 作者单位： | 西南大学园艺园林学院,重庆,400715;西南大学园艺园林学院,重庆,400715 |
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| 摘 要： | 目的]研究湿地植物在不同水力条件下对中水的净化功效。方法]在人工构建的湿地系统中,将中水回用作为湿地水源,研究了5种湿地植物菖蒲、美人蕉、梭鱼草、再力花和狐尾藻在不同水力停留时间、水深和水流速度(湿地表面流速和湿地渗滤流速)下对供试中水总氮(TN)、总磷(TP)的去除效果。结果]湿地植物在适宜水力条件下对中水具有一定的净化效果,其中菖蒲和美人蕉的TN系统出水含量符合"地表水环境质量标准Ⅲ类"水体要求,TP系统出水含量符合"地表水环境质量标准Ⅱ类"水体要求。综合考虑5种植物对TN、TP的去除效果,模拟湿地系统适宜采用的水力停留时间为2 d,水深为20 cm。该情况下,不同表面流速处理对中水TN平均表面去除率达到21.08%,TP平均表面去除率达到17.63%。而不同渗滤流速处理对中水TN、TP系统去除均值分别为57.72%和64.84%。结论]该研究可为中水污染治理提供科学依据。
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| 关 键 词： | 湿地植物 水力停留时间 水深 水流速度 中水净化 |
Purification Effects of Wetland Plants in Reclaimed Water under Different Hydraulic Conditions |
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| HU Bi-ying,WANG Hai-yang.Purification Effects of Wetland Plants in Reclaimed Water under Different Hydraulic Conditions[J].Journal of Anhui Agricultural Sciences,2017,45(8). |
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| Authors: | HU Bi-ying WANG Hai-yang |
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| Abstract: | Objective]To study the purification efficiency of wetland plants under different hydraulic conditions.Method]Based on the constructed wetland system with reclaimed water,the experiments on removal efficiency of TN,TP under different hydraulic retention time,water depth and velocity (surface flow velocity and percolation flow velocity) in Acorus calamus L.,Canna indica L.,Pontederia cordata L.,Thalia dealbata L and Myriophyllum verticillatum L.were conducted.Result]The results showed that wetland plants under varying hydraulic conditions have significant effects on reclaimed water purification.Above all the five plants ,Acorus calamus L.and Canna indica L.have optimal performance on pollutants' removal.The concentrations of TN in the treated effluent of Acorus calamus L.and Canna indica L.could achieve the "Environmental Quality Standards For Surface Water Class Ⅲ Standard",and which of TP could achieve "Environmental Quality Standards For Surface Water Class Ⅱ Standard".Comprehensively considering the removal capability of five plants,suitable hydraulic conditions was suggested as 2 d of hydraulic retention time,20 cm of water depth.Under this circumstances,the average surface removal rate of TN,TP were 21.08%,17.63%,the mean values of TN,TP in system treated effluent were 57.72%,64.84% respectively.Conclusion]The study can provide scientific basis for water pollution control. |
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| Keywords: | Wetland plants Hydraulic retention time Water depth Water velocity Reclaimed water purification |
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