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Evaluating the performance of different media in a horizontal subsurface flow constructed wetland

Shuib, N., Baskaran, K., Jegatheesan, V. and Muthukumaran, S. 2011, Evaluating the performance of different media in a horizontal subsurface flow constructed wetland, in AGRO 2011 : Proceedings of the 8th International IWA Symposium on Waste Management Problems in Agro-Industries, [IWA], [Izmir, Turkey], pp. 345-352.

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Title Evaluating the performance of different media in a horizontal subsurface flow constructed wetland
Author(s) Shuib, N.
Baskaran, K.
Jegatheesan, V.
Muthukumaran, S.
Conference name Waste Management Problems in Agro-Industries. Symposium (8th : 2011 : Izmir, Turkey)
Conference location Izmir, Turkey
Conference dates 22-24 June 2011
Title of proceedings AGRO 2011 : Proceedings of the 8th International IWA Symposium on Waste Management Problems in Agro-Industries
Editor(s) [Unknown]
Publication date 2011
Conference series Waste Management Problems in Agro-Industries. Symposium
Start page 345
End page 352
Publisher [IWA]
Place of publication [Izmir, Turkey]
Keyword(s) alum sludge
gravel
hydraulic retention time
sub-surface horizontal flow
zeolite
Summary The treatment efficiency of a wetland system requires a balance between pollutant loading rate and hydraulic retention time (HRT), hydraulic loading rate (HLR) and the suitable substrate to be used. The aim of this study was to investigate the treatment efficiency of horizontal subsurface flow constructed wetland planted with phragmites australis and scirpus maritimus containing three different substrates to treat agricultural wastewater under short term operation. Alum sludge and zeolite were used as substrates and gravel was used as a control for a laboratory-scale horizontal flow constructed wetland (CW) units that were made of high-density Polyethylene. The units were operated under 2, 3 and 4 days of HRTs and at different HLR for each substrate. Each beds received 0.012 m3/d to 0.08 m3/d of synthetic wastewater corresponding to a HLR of 0.035 to 0.243 m/d and a COD loading rate of 0.0148 kg COD (m2.d)-1 to 0.026 kg COD (m2.d)-1. The relationships between the substrate, retention time and removal efficiency, especially of organic matter and nutrient removal were investigated. All units showed relatively stable removal for COD during the entire operational period. The COD removal for all units and HRT were in ranged from 67% to 93%. The zeolite unit achieved significantly higher removal of TN, NH4-N and TSS compared to alum sludge and gravel unit at all HRT. The unit with zeolite was highly effective in removing TN (54 to 96%), NH4-N (50 to 99%) and TSS (91 to 96%) respectively, at 2, 3 and 4 days of HRT. Meanwhile, alum sludge was highly effective in removing phosphate. The removal of phosphate from alum sludge unit was ranged from 94 to 97% for all HRT. Compared to gravel CW unit, zeolite and alum sludge CW were proved to be tolerant to high organic loadings and nutrients, suggesting these substrates as viable options for biological treatment of agricultural wastewater.
ISBN 9789755614007
Language eng
Field of Research 090409 Wastewater Treatment Processes
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category E2 Full written paper - non-refereed / Abstract reviewed
Copyright notice ©2011, IWA publishing
Persistent URL http://hdl.handle.net/10536/DRO/DU:30042374

Document type: Conference Paper
Collection: School of Engineering
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