Removal of Nutrients from Septic Effluent with Re-circulated Hybrid Tidal Flow Constructed Wetland
Removal of Nutrients from Septic Effluent with Re-circulated Hybrid Tidal Flow Constructed Wetland
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DOI：
10.1016/j.ecoleng.2012.06.003
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发表时间：
2012-09
影响因子：
3.8
通讯作者：
L. Cui;Jing-jing Feng;Ouyang Ying;P. Deng
中科院分区：
文献类型：
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作者：
L. Cui;Jing-jing Feng;Ouyang Ying;P. Deng
混合潮流人工湿地(CW)是一种去除污水中过量营养物质和某些污染物的改良生物工程技术。研究了混合潮流CW系统对化粪池出水中总磷(TP)、氨氮(NH3-N)和总氮(TN)的去除效果。结果表明，当水力负荷从0.5 m~3/m~2/d过渡到1.5m~3/m~2/d时，TP和NH3-N的去除效果降低，而TN的去除则先增加后降低，在HLR为1.0m~3/m~2/d时，TN的去除达到最大值，TP、NH_3-N和TN的总去除范围分别为35.55~77.68%、33.30~72.71%和16.25~53.17%。一般而言，增加再循环频率可以增加污水的处理量。研究表明，与传统的垂直流CW相比，再循环混合潮流CW具有更好的除磷效果。
Hybrid tidal flow constructed wetland (CW) with recirculation is an improved biological and engineering technique for removal of excess nutrients and certain pollutants from wastewater. This study investigated the removal efficiency of total phosphorus (TP), ammonia-nitrogen (NH3-N), and total nitrogen (TN) from septic tank effluent with the hybrid tidal flow CW system. Results showed that the removal of TP and NH3-N decreased as the hydraulic loading rate (HLR) increased, while the removal of TN increased and then decreased as the transition of HLR from 0.5 to 1.5m3/m2/d. The removal of TN was maximized at the HLR of 1.0m3/m2/d. The overall removal ranges of TP, NH3-N, and TN were 35.55–77.68%, 33.30–72.71%, and 16.25–53.17%, respectively. In general, an increase in recirculation frequency could increase the treatment volume of the effluent. This study suggests that the recirculation hybrid tidal flow CW has better performance in removal of nutrients than that of the traditional vertical flow CW.