Abstract
The objective of this study is to determine the reduction efficiency of chemical oxygen demand (COD) as well as the removal of -N and -N by the Aerobic–anaerobic Baffled Constructed Wetland Reactor (ABCW). The ABCW reactor was planted with common reed (Phragmite australis), where the hydraulic retention times was set to 1 d and was fed with synthetic wastewater. Supplementary aeration was supplied in designated compartments of the ABCW reactor to control the aerobic and anaerobic zones. The COD reduction efficiency was 98%, while the -N and -N removal was 36–98%, respectively, which was due to nitrification and denitrification processes. The outstanding performance of the baffled unit was due to the longer pathway as there is the up-flow and down-flow condition sequentially, thus allowing more contact of the wastewater with the rhizomes and micro-aerobic zones.
Acknowledgements
This research was supported by the Fundamental Research Grant Scheme (FRGS), Ministry of Higher Education (Grant no. 9003-00543).
Notes
Presented at The 2nd IWA Malaysia Young Water Professionals Conference 2015 (YWP15) March 17–20, 2015, Kuala Lumpur, Malaysia