Nitrogen removal in intermittently aerated vertical flow constructed wetlands: Impact of influent COD/N ratios

Publication Type:
Journal Article
Bioresource Technology, 2013, 143 pp. 461 - 466
Issue Date:
Filename Description Size
Nitrogen removal in intermittently AVF constructed wetlands.pdfAccepted Manuscript203.84 kB
Adobe PDF
Full metadata record
The performance response of eight vertical flow constructed wetlands (VFCWs) to different influent COD/N ratios and intermittent aeration in domestic wastewater treatment was investigated. Almost complete nitrification was obtained by intermittent aeration, which well developed alternate anaerobic and aerobic conditions for nitrification and denitrification. Sufficient carbon source supply resulted from influent COD/N ratio of 10 simultaneously obtained high removals of COD (96%), ammonia nitrogen (99%) and total nitrogen (90%) in intermittently aerated VFCWs. In all non-aerated VFCWs, poor nitrification was observed due to oxygen deficiency whilst high COD/N ratios further led to lower COD and nitrogen removal efficiency. The results suggest that intermittent aeration combined with high influent COD/N ratios could achieve high nitrogen removal in VFCWs. © 2013 Elsevier Ltd.
Please use this identifier to cite or link to this item: