Co-conditioning of the anaerobic digested sludge of a municipal wastewater treatment plant with alum sludge : benefit of phosphorus reduction in reject water

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dc.contributor.author Yang, Y.
dc.contributor.author Zhao, Y.Q.
dc.contributor.author Babatunde, A.O.
dc.contributor.author Kearney, P.
dc.date.accessioned 2011-10-28T13:32:51Z
dc.date.available 2011-10-28T13:32:51Z
dc.date.copyright 2007, Water Environment Federation en
dc.date.issued 2007-12
dc.identifier.citation Water Environment Research en
dc.identifier.issn 1061-4303
dc.identifier.uri http://hdl.handle.net/10197/3275
dc.description.abstract In this study, alum sludge was introduced into co-conditioning and dewatering with an anaerobic digested activated sludge to examine the role of the alum sludge in improving the dewaterbility of the mixed sludge and also in immobilizing phosphorus in the reject water. Experiments have demonstrated that the optimal mix ratio for the two sludges is 2:1 (anaerobic digested sludge: alum sludge; volume basis), and this can bring about 99% phosphorus reduction in the reject water through the adsorption of phosphorus by Al in the sludge. The phosphorus loading in wastewater treatment plants is itself derived from the recycling of reject water during the wastewater treatment process. Consequently, this co-conditioning and dewatering strategy can achieve a significant reduction in phosphorus loading in wastewater treatment plants. In addition, the use of the alum sludge can beneficially enhance the dewaterbility of the resultant mixed sludge by decreasing both the SRF and the CST, due to the alum sludge acting as a skeleton builder. Experiments have also demonstrated that the optimal polymer (Superfloc C2260) dose for the anaerobic digested sludge was 120 mg/l while the optimal dose for the mixed sludge (mix ratio 2:1) was 15 mg/l, highlighting a huge saving in polymer addition. Therefore, from the technical perspective, the co-conditioning and dewatering strategy can be viewed as a “win-win” situation. However, for its full-scale application, integrated cost-effective analysis of process capabilities, sludge transport, increased cake disposal, additional administration, polymer saving etc. should be factored in. en
dc.description.sponsorship Other funder en
dc.format.extent 367301 bytes
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Water Environment Federation en
dc.relation.requires Critical Infrastructure Group Research Collection en
dc.relation.requires Urban Institute Ireland Research Collection en
dc.rights This paper may be downloaded for personal uses only. Any other use requires prior permission of the Water Environment Federation. en
dc.subject Adsorption en
dc.subject Alum sludge en
dc.subject Biological phosphorus removal en
dc.subject Conditioning en
dc.subject Anaerobic digested excess sludge en
dc.subject Phosphorus removal en
dc.subject Reject water en
dc.subject Nutrient control en
dc.subject.lcsh Phosphates--Absorption and adsorption en
dc.subject.lcsh Water treatment plant residuals en
dc.subject.lcsh Sewage sludge--Conditioning en
dc.subject.lcsh Sewage--Purification--Anaerobic treatment en
dc.title Co-conditioning of the anaerobic digested sludge of a municipal wastewater treatment plant with alum sludge : benefit of phosphorus reduction in reject water 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/10.2175/106143007X184753 en
dc.status Peer reviewed en
dc.identifier.volume 79 en
dc.identifier.issue 13 en
dc.identifier.startpage 2468 en
dc.identifier.endpage 2476 en
dc.identifier.doi 10.2175/106143007X184753
dc.neeo.contributor Yang|Y.|aut| en
dc.neeo.contributor Zhao|Y.Q.|aut| en
dc.neeo.contributor Babatunde|A.O.|aut| en
dc.neeo.contributor Kearney|P.|aut| en
dc.description.othersponsorship Environmental Protection Agency en


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