Process-based modelling of phosphorus removal in a novel constructed wetland system using dewatered alum-sludge as substrate

Files in This Item:
File Description SizeFormat 
8-P_WST.pdf722.44 kBAdobe PDFDownload
Title: Process-based modelling of phosphorus removal in a novel constructed wetland system using dewatered alum-sludge as substrate
Authors: Kumar, J.L.G.
Zhao, Y.Q.
Babatunde, A.O.
Permanent link: http://hdl.handle.net/10197/4019
Date: 2011
Abstract: A process-based model that can evaluate the transport and the fate of phosphorus (P) in agricultural wastewater was developed for a novel 4-stage dewatered alum sludge cakes (DASC) based constructed wetlands (CWs) system using STELLA software (version 9.1.4). The model considered adsorption, plant and microbial uptakes as the major forms of P involved in the transformation chains. The results were obtained by experimental procedure through laboratory measurement, from literature and/or calibration. The observed effluent P concentration in the CWs ranged from 3.62 to 8.50 mg/L (stage 1), 2.00 to 4.45 mg/L (stage 2), 1.39 to 3.76 mg/L (stage 3) and 0.52 to 2.36 mg/L (stage 4), whereas the simulated values ranged from 2.12 to 10.99 mg/L (stage 1), 1.32 to 5.65 mg/L (stage 2), 0.84 to 3.64 mg/L (stage 3) and 0.53 to 2.25 mg/L (stage 4), respectively. The simulated and observed values of P removal in the CWs system were in good agreement. A mass balance analysis was performed for all the major processes which resulted in a major pathway of P removal through adsorption (64–75%, 58–66%, 57–63% and 49–58%) followed by plant uptake (7–11%, 8–14%, 14–17% and 9–19%) and microbial uptake (3–7%, 3–5%, 9–12% and 7–12%) for stage 1, stage 2, stage 3 and stage 4, respectively. Thus the mathematical model developed in this study could be used to explain the removal processes and simulate the fate of P in the DASC-based CWs system.
Type of material: Journal Article
Publisher: IWA Publishing
Journal: Water Science & Technology
Volume: 64
Issue: 3
Start page: 774
End page: 780
Copyright (published version): 2011, IWA Publishing
Keywords: Alum sludgeConstructed wetlandsModellingPhosphorus removalSTELLA
DOI: 10.2166/wst.2011.711
Language: en
Status of Item: Peer reviewed
Appears in Collections:Civil Engineering Research Collection

Show full item record

SCOPUSTM   
Citations 50

3
Last Week
0
Last month
checked on Nov 12, 2018

Page view(s) 50

114
checked on May 25, 2018

Download(s) 50

108
checked on May 25, 2018

Google ScholarTM

Check

Altmetric


This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.