The effects of different aeration strategies on the performance of constructed wetlands for phosphorus removal

Environmental Science and Pollution Research International
Huma Ilyas, Ilyas Masih

Abstract

The effects of different aeration methods such as tidal flow (TF), effluent recirculation (ER), and artificial aeration (AA) on the performance of vertical-flow constructed wetland (VFCW), horizontal-flow constructed wetland (HFCW), and hybrid constructed wetland (HCW) are extensively and critically evaluated in this review paper. Aerated constructed wetlands (CWs) demonstrate superior performance compared with non-aerated systems. The removal of total phosphorus (TP) showed substantial variation among different types of CWs and aeration strategies, with mean and standard deviation of 68 ± 20% estimated from all reviewed studies on aerated systems. The TF-VFCW designated the highest removal efficiency and removal rate of 88 ± 6% and 2.6 ± 2.5 g m-2 day-1, respectively, followed by the ER-HCW with values of 79 ± 18% and 1.3 ± 0.7 g m-2 day-1, respectively. The superior performance of TF-VFCW could be attributed to a positive effect of TF in rejuvenating the wetland with fresh air, thus enhancing dissolved oxygen (DO) in the system, and augmenting phosphorus precipitation and adsorption to the substrate. A positive correlation of TP and orthophosphate (PO43--P) with DO indicates that the improvement in DO levels due to redox mani...Continue Reading

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Mar 12, 2017·Environmental Science and Pollution Research International·Huma Ilyas, Ilyas Masih
May 12, 2017·Journal of Environmental Management·Huma Ilyas, Ilyas Masih

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Citations

May 6, 2020·International Journal of Environmental Research and Public Health·Huma Ilyas, Eric D van Hullebusch
Feb 18, 2021·Environmental Science and Pollution Research International·Jocelina Paranhos Rosa De VargasJérôme Labanowski
Mar 12, 2020·Environmental Science and Pollution Research International·Huma Ilyas, Eric D van Hullebusch
Jul 7, 2021·Environmental Science and Pollution Research International·Jianling XuXiaodan Jiang

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