湿地植物在不同水力条件下对中水的净化效果

发布时间：2018-06-25 07:43

  本文选题：湿地植物 + 水力停留时间　； 参考：《安徽农业科学》2017年08期

【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。
[Abstract]:[objective] to study the purification effect of wetland plants on reclaimed water under different hydraulic conditions. [methods] in the constructed wetland system, the reclaimed water was used as the wetland water source, and five wetland plants, Acorus calamus, banana, barracuda, reamer and foxtail algae, were studied in different HRT. The removal effect of total nitrogen (TN) and total phosphorus (TP) under water depth and flow velocity (surface velocity of wetland and infiltration velocity of wetland). [results] Wetland plants have a certain purification effect on reclaimed water under suitable hydraulic conditions. The effluent contents of the TN system of Acorus calamus and Canna plantain were in line with the "Surface Water Environmental quality Standard Class 鈪，

本文编号：2065189