Characterization of sludges produced when using polyaluminum chloride coagulants

dc.contributor.authorWise, Lynn V.en
dc.contributor.departmentEnvironmental Engineeringen
dc.date.accessioned2014-03-14T21:31:23Zen
dc.date.adate2009-03-12en
dc.date.available2014-03-14T21:31:23Zen
dc.date.issued1991en
dc.date.rdate2009-03-12en
dc.date.sdate2009-03-12en
dc.description.abstractThe dewatering characteristics of polyaluminum chloride (Hyper⁺Ion 1050A) sludges were investigated using lab-scale tests including specific resistance to filtration (r*), capillary suction time (CST), and sludge pH. The effects of chemical conditioning (lime and cationic polymer) and mixing intensity (Gt) upon the sludge dewatering characteristics in a pilot-scale plate and frame press were also studied. The dewatering characteristics of the Hyper⁺Ion sludges were found to be dependent upon the influent water turbidity conditions; specifically, the ratio of aluminum coagulant to total dry solids in the sludge. Lime was an effective conditioner for doses that produced a sludge pH value in the range of 11.5 to 11.8 which, again, was a direct function of the aluminum coagulant fraction in the sludge. Cationic polymer and a combination of lime and polymer were also effective conditioning schemes when the appropriate dose and mixing intensity were applied.en
dc.description.degreeMaster of Scienceen
dc.format.extentix. 103 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-03122009-041425en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03122009-041425/en
dc.identifier.urihttp://hdl.handle.net/10919/41514en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1991.W583.pdfen
dc.relation.isformatofOCLC# 25119783en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1991.W583en
dc.subject.lcshSludge bulkingen
dc.subject.lcshWater treatment plantsen
dc.titleCharacterization of sludges produced when using polyaluminum chloride coagulantsen
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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