标题：Optimization of organics and nitrogen removal in intermittently aerated vertical flow constructed wetlands: Effects of aeration time and aeration rate
作者：Wu, Haiming; Fan, Jinlin; Zhang, Jian; Ngo, Huu Hao; Guo, Wenshan; Hu, Zhen; Lv, Jialong
作者机构：[Wu, Haiming; Lv, Jialong] Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China.; [Wu, Haiming; Zhang, Jian; 更多
会议名称：8th Annual International Conference of Challenges in Environmental Science and Engineering (CESE)
会议日期：SEP 28-OCT 02, 2015
来源：INTERNATIONAL BIODETERIORATION & BIODEGRADATION
关键词：Constructed wetlands; Intermittent aeration; Denitrification;; Nitrification; Organic matter removal
摘要：In this study, to optimize aeration for the enhancement of organics and nitrogen removal in intermittently aerated vertical flow constructed wetlands (VF CWs) for treating domestic wastewater, the experimental VF CWs were operated at different aeration time (1 h d(-1), 2 h d(-1), 4 h d(-1), 6 h d(-1), 8 h d(-1) and 10 h d(-1)) and aeration rate (0.1 L min(-1), 0.2 L min(-1), 0.5 L min(-1), 1.0 L min(-1) and 2.0 L min(-1)) to investigate the effect of artificial aeration on the removal efficiency of organics and nitrogen. The results showed that the optimal aeration time and aeration rate were 4 h d(-1) and 1.0 L min(-1), which could create the appropriate aerobic and anoxic regions in CWs with the greater removal of COD (97.2%), NH4+-N (98.4%) and TN (90.6%) achieved simultaneously during the experiment. The results demonstrate that the optimized intermittent aeration is reliable option to enhance the treatment performance of organics and nitrogen at a lower operating cost. (C) 2016 Elsevier Ltd. All rights reserved.