M Dzakpasu
Nitrogen transformations and mass balance in an integrated constructed wetland treating domestic wastewater
Dzakpasu, M; Scholz, M; McCarthy, V; Jordan, S
Authors
M Scholz
V McCarthy
S Jordan
Abstract
Nitrogen (N) transformations and removal in integrated constructed wetlands (ICWs) are often high,
but the contributions of various pathways, including nitrification/denitrification, assimilation by
plants and sediment storage, remain unclear. This study quantified the contributions of different N
removal pathways in a typical multi-celled ICW system treating domestic wastewater. Findings
showed near complete average total N retention of circa 95% at 102.3 g m2 yr1 during the 4-year
period of operation. Variations in total N and NH4–N removal rates were associated with effluent flow
volume rates and seasons. According to the mass balance estimation, assimilation by plants and
sediment/soil storage accounted for approximately 23% and 20%, respectively, of the total N load
removal. These were the major N removal route besides microbial transformations. Thus, the
combination of plants with high biomass production offer valuable opportunities for improving ICW
performance. The retrieval and use of sequestered N in the ICW sediment/soils require coherent
management and provide innovative and valuable opportunities.
Citation
Dzakpasu, M., Scholz, M., McCarthy, V., & Jordan, S. (2014). Nitrogen transformations and mass balance in an integrated constructed wetland treating domestic wastewater. Water Science and Technology, 70(9), 1496-1502. https://doi.org/10.2166/wst.2014.402
Journal Article Type | Article |
---|---|
Acceptance Date | Sep 8, 2014 |
Online Publication Date | Sep 20, 2014 |
Publication Date | Nov 1, 2014 |
Deposit Date | Mar 16, 2015 |
Journal | Water Science and Technology |
Print ISSN | 0273-1223 |
Publisher | IWA Publishing |
Peer Reviewed | Peer Reviewed |
Volume | 70 |
Issue | 9 |
Pages | 1496-1502 |
DOI | https://doi.org/10.2166/wst.2014.402 |
Publisher URL | http://dx.doi.org/10.2166/wst.2014.402 |
Related Public URLs | http://www.iwaponline.com/wst/default.htm |
Additional Information | Funders : Funder not known |
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