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Phosphorus retention and mass balance in an integrated constructed wetland treating domestic wastewater

Dzakpasu, M, Scholz, M, McCarthy, V and Jordan, S 2015, 'Phosphorus retention and mass balance in an integrated constructed wetland treating domestic wastewater' , Water and Environment Journal . (In Press)

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Abstract

This study quantified the contributions of different P removal pathways in an integrated constructed wetland (ICW) treating domestic wastewater. Findings over the study period (February 2008 to March 2012) showed average P retention rates of 31 ± 2 mg/m2/day for molybdate reactive phosphate (MRP) and 40 ± 3 mg/m2/day for total P. Near complete P removal was achieved during the first 2 years of operation. Thereafter, effluent concentrations increased slightly. According to the mass balance estimation, assimilation by plants accounted for approximately 16% of the total P retained, while sediment storage contributed nearly 60%. Sediment storage was the major P removal pathway in the ICW. Thus, high effluent concentrations recorded during high effluent flow volumes was due to remobilisation of P from the sediment. Management of ICW systems may therefore require implementing sediment removal schemes. The combination of plants with high biomass production can be beneficial for improving ICW performance.

Item Type: Article
Themes: Built and Human Environment
Schools: Schools > School of Computing, Science and Engineering > Salford Innovation Research Centre (SIRC)
Journal or Publication Title: Water and Environment Journal
Publisher: Wiley
Refereed: Yes
ISSN: 1747-6585
Related URLs:
Funders: Funder not known
Depositing User: B Li
Date Deposited: 17 Mar 2015 12:45
Last Modified: 29 Oct 2015 00:18
URI: http://usir.salford.ac.uk/id/eprint/33869

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