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dc.contributor.authorBandak, Nazihen_US
dc.date.accessioned2014-03-14T21:49:47Z
dc.date.available2014-03-14T21:49:47Z
dc.date.issued1986-07-05en_US
dc.identifier.otheretd-11152013-040418en_US
dc.identifier.urihttp://hdl.handle.net/10919/45743
dc.description.abstractConditioning studies were conducted on several water and wastewater sludges using polymers to determine the effect of high-intensity mixing on floc formation and breakup. Mechanisms acting in particle coagulation were also investigated. A rapid mixing apparatus was used in conditioning the sludge to simulate the high velocity gradients encountered in most dewatering equipment. Anionic and cationic polymers of varying molecular weights and an inorganic coagulant were chosen as the conditioning agents. Dewatering rates were measured by the capillary suction time (CST) apparatus. The effect of rapid mixing on the polymer efficiency was evaluated by premixing the polymer, using the same mixing apparatus, prior to applying it to condition the sludge. Data analyses revealed the great impact the primary floc breakup has on the sludge dewatering rate, although this was shown to be dependent on the nature of the sludge particles. Some minor changes were imparted to the polymer chains by intense mixing but there was no evidence that particlepolymer bonds were fractured. The mechanisms of coagulation were observed to be related to sludge type. Overall, successful conditioning of sludges by polymers requires a proper determination of the sludge characteristics, a correct choice of polymer type and dose, and a knowledge of the mixing intensities.en_US
dc.format.mediumBTDen_US
dc.publisherVirginia Techen_US
dc.relation.haspartLD5655.V855_1986.B364.pdfen_US
dc.subjectSewage sludgeen_US
dc.subject.lccLD5655.V855 1986.B364en_US
dc.titleEffect of mixing intensity on polymer conditioning of sludgesen_US
dc.typeThesisen_US
dc.contributor.departmentCivil Engineeringen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
dc.contributor.committeechairNovak, J. T.en_US
dc.contributor.committeememberRandall, C. W.en_US
dc.contributor.committeememberKnocke, W. R.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11152013-040418/en_US
dc.date.sdate2013-11-15en_US
dc.date.rdate2013-11-15
dc.date.adate2013-11-15en_US


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