期刊
BIORESOURCE TECHNOLOGY
卷 198, 期 -, 页码 7-15出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.08.150
关键词
Constructed wetland; Oxidation pond; Aeration position; Artificial aeration
资金
- Key Special Program on the S&T for the Pollution Control and Treatment of Water Bodies of China [2014ZX07203-009]
- National Natural Science Foundation of China [51308385]
Given that few studies investigated the effects of aeration position (AP) on the performance of aerated constructed wetlands, the aim of this study was to evaluate the effects of AP on organics, nitrogen and phosphorus removal in lab-scale combined oxidation pond-constructed wetland (OP-CW) systems. Results showed that middle aeration allowed the CW to possess more uniform oxygen distribution and to achieve greater removals of COD and NH3-N, while the CW under bottom aeration and surface aeration demonstrated more distinct stratification of oxygen distribution and surface aeration brought about better TN removal capacity for the OP-CW system. However, no significant influence of artificial aeration or AP on TP removal was observed. Overall, AP could significantly affect the spatial distribution of dissolved oxygen by influencing the oxygen diffusion paths in aerated CWs, thereby influencing the removal of pollutants, especially organics and nitrogen, which offers a reference for the design of aerated CWs. (C) 2015 Elsevier Ltd. All rights reserved.
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