Laboratory evaluation of conditioning requirements for sludge dewatering using belt filter press

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dc.contributor.authorBurgos, William Daviden
dc.contributor.committeechairNovak, John T.en
dc.contributor.committeememberKnocke, William R.en
dc.contributor.committeememberGallagher, Daniel L.en
dc.contributor.departmentEnvironmental Engineeringen
dc.date.accessioned2014-03-14T21:31:47Zen
dc.date.adate2009-03-14en
dc.date.available2014-03-14T21:31:47Zen
dc.date.issued1990-12-06en
dc.date.rdate2009-03-14en
dc.date.sdate2009-03-14en
dc.description.abstractThe purposes of this study were to develop a reliable bench-scale testing procedure to adequately predict polymer conditioning requirements for full-scale belt filter presses, and to determine the additional polymer demand exerted by applied pressure during the expression stage of a dewatering process. Bench-scale experiments performed with anaerobically digested, alum, and secondary sludges used a high-speed mixer to gauge mixing intensity effects, and a wedge zone tester to gauge applied pressure effects on conditioning requirements. Full-scale experiments varied Sludge throughput, belt speed, and polymer dose to evaluate polymer performance. The polymer requirements to optimize performance of a full-scale belt filter press can be predicted with a bench-scale mixing device, where the shear (Gt) of the mixer matches that of the full-scale press. An estimate of the Gt value of the full-scale belt filter presses used in this study was 10,000. Alternatively, a bench-scale wedge zone tester, operated in an applied pressure range between 5 psi and 20 psi, can predict polymer doses for optimum belt filter press performance. The range of applied pressures used to simulate the expression phase of a dewatering process did not exert a Significant additional polymer demand for optimum conditioning. The shear (Gt) associated with mixing sludge and polymer during conditioning can exert a greater polymer demand than the expression phase of the wedge zone tester.en
dc.description.degreeMaster of Scienceen
dc.format.extentx, 104 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-03142009-040806en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03142009-040806/en
dc.identifier.urihttp://hdl.handle.net/10919/41628en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1990.B974.pdfen
dc.relation.isformatofOCLC# 23817997en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1990.B974en
dc.subject.lcshSewage sludge -- Conditioningen
dc.titleLaboratory evaluation of conditioning requirements for sludge dewatering using belt filter pressen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineEnvironmental Planningen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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