Skip to the content

Assessment of long-term phosphorus retention in an integrated constructed wetland treating domestic wastewater

Dzakpasu, M, Scholz, M, McCarthy, V and Jordan, S 2015, 'Assessment of long-term phosphorus retention in an integrated constructed wetland treating domestic wastewater' , Environmental Science and Pollution Research, 22 (1) , pp. 305-313.

Full text not available from this repository. (Request a copy)

Abstract

Due to the nature of the phosphorus (P) removal mechanisms associated with constructed wetlands, the sustainability of P treatment is usually of high interest. As a result, a 4-year dataset from a typical multi-celled integrated constructed wetland (ICW) located at Glaslough in Co. Monaghan, Ireland was evaluated to determine the effects of long-term P loadings and hydrological inputs on P treatment. The ICW was intensively monitored year-round from February 2008 through March 2012 for total P and molybdate reactive phosphate (MRP). Domestic wastewater was loaded at 16.4 ± 0.96 g m(2) year(-1) for total P and 11.2 ± 0.74 g m(2) year(-1) for MRP. Average mass reductions over the monitoring period were 91.4 and 90.1%, respectively. The area-based kinetic coefficients (K(20)) of 11.8 for total P and 15.6 m year(-1) for MRP indicated a high area-specific retention rate. The ICW appeared to have a sustained capacity for P adsorption and retention, but the treatment was influenced mainly by external hydrological inputs and fluctuations in wastewater loadings. Linear regression analyses showed a reduction in mass retention of both total P and MRP with increased effluent flow volumes. Monthly mass reductions exceeded 90% when the effluent flow volumes were less than 200 m(3) day(-1). When monthly effluent flow volumes exceeded 200 m(3) day(-1), nonetheless, mass reductions became highly variable. Designs and management of ICW systems should adopt measures to limit external hydrological loadings in order to maintain sufficient P treatment.

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: Environmental Science and Pollution Research
Publisher: Springer Verlag
Refereed: Yes
ISSN: 0944-1344
Related URLs:
Funders: Funder not known
Depositing User: B Li
Date Deposited: 16 Mar 2015 16:57
Last Modified: 29 Oct 2015 00:18
URI: http://usir.salford.ac.uk/id/eprint/33784

Actions (login required)

Edit record (repository staff only) Edit record (repository staff only)