Development of alum sludge-based constructed wetland : an innovative and cost-effective system for wastewater treatment

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dc.contributor.author Zhao, Y.Q.
dc.contributor.author Babatunde, A.O.
dc.contributor.author Zhao, X.H.
dc.contributor.author Li, W.C.
dc.date.accessioned 2011-08-30T14:12:05Z
dc.date.available 2011-08-30T14:12:05Z
dc.date.copyright Taylor & Francis Group, LLC en
dc.date.issued 2009-05
dc.identifier.citation Journal of Environmental Science and Health, Part A en
dc.identifier.issn 1093-4529 (Print)
dc.identifier.issn 1532-4117 (Online)
dc.identifier.uri http://hdl.handle.net/10197/3131
dc.description.abstract This paper describes (in a summarised manner) a research attempt to integrate the dewatered alum sludge, a residual by-product of drinking water treatment process, into a constructed wetland (CW) system for the purpose of enhancing the wastewater treatment performance, thus developing a so called alum sludge-based constructed wetland system. A multi-dimensional research project including the batch tests of phosphorus (P) adsorption onto alum sludge followed by the model CWs trials of single and multi-stage CWs, has been conducted since 2004. It has been successfully demonstrated that the alum sludge-based CW is capable of enhanced and simultaneous removal of P and organic matter (in terms of BOD5 and COD), particularly from medium and high strength wastewater. The sludge cakes act as the carrier for developing biofilm for organics removal and also serve as adsorbent to enhance P immobilization. Batch P-adsorption tests revealed that the alum sludge tested possesses excellent P-adsorption ability of 14.3 mg-P/g.sludge (in dry solids) at pH 7.0 with the adsorption favored at lower pH. The results obtained in a 4-stage treatment wetland system suggest that high removal efficiencies of 90.4% for COD, 88.0% for BOD5, 90.6% for SS, 76.5% for TN and 91.9% for PO43--P under hydraulic loading of 0.36m3/m2·d can be achieved. The field demonstration study of this pioneering development is now underway. en
dc.description.sponsorship Other funder en
dc.format.extent 247479 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Taylor & Francis en
dc.relation.requires Architecture, Landscape & Civil Engineering Research Collection en
dc.relation.requires Critical Infrastructure Group Research Collection en
dc.relation.requires Urban Institute Ireland Research Collection en
dc.rights This is an electronic version of an article published in Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances & Environmental Engineering, 44 (8): 827-832, available online at: http://www.tandfonline.com/doi/abs/10.1080/10934520902928685 en
dc.subject Alum sludge en
dc.subject Constructed wetland en
dc.subject Reuse en
dc.subject Substrate en
dc.subject Wastewater treatment en
dc.subject.lcsh Water treatment plant residuals en
dc.subject.lcsh Constructed wetlands en
dc.subject.lcsh Phosphorus--Absorption and adsorption en
dc.title Development of alum sludge-based constructed wetland : an innovative and cost-effective system for wastewater treatment en
dc.type Journal Article en
dc.internal.availability Full text available en
dc.internal.webversions Publisher's version en
dc.internal.webversions http://dx.doi.org/10.1080/10934520902928685 en
dc.status Peer reviewed en
dc.identifier.volume 44 en
dc.identifier.issue 8 en
dc.identifier.startpage 827 en
dc.identifier.endpage 832 en
dc.identifier.doi 10.1080/10934520902928685
dc.neeo.contributor Zhao|Y.Q.|aut| en
dc.neeo.contributor Babatunde|A.O.|aut| en
dc.neeo.contributor Zhao|X.H.|aut| en
dc.neeo.contributor Li|W.C.|aut| en
dc.description.othersponsorship Environmental Protection Agency en


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