Journal
DESALINATION AND WATER TREATMENT
Volume 57, Issue 60, Pages 29160-29167Publisher
DESALINATION PUBL
DOI: 10.1080/19443994.2016.1189698
Keywords
Aerobic-anaerobic baffled constructed wetland; Sodium benzoate; Artificial wastewater; Nutrients
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The objective of this study is to determine the reduction efficiency of chemical oxygen demand (COD) as well as the removal of NH4+-N and NO3--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 NO3--N and NH4+-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.
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