Chang, G. R.G. R.ChangLiu, J. C.J. C.LiuDUU-JONG LEE2008-12-102018-06-282008-12-102018-06-28200100431354http://ntur.lib.ntu.edu.tw//handle/246246/90044https://www.scopus.com/inward/record.uri?eid=2-s2.0-0035255291&doi=10.1016%2fS0043-1354%2800%2900326-2&partnerID=40&md5=4f67556b72ebc287d4805eaf895738b8The conditioning and dewatering behaviors of chemical and waste activated sludges from a tannery were studied. Capillary suction time (CST), specific resistance to filtration (SRF), and bound water content were used to evaluate the sludge dewatering behaviors. Zeta potentials were also measured. Experiments were conducted on each sludge conditioned and dewatered separately, and on the sludge mixed at various ratios. Results indicate that the chemical sludge was relatively difficult to be dewatered, even in the presence of polyelectrolyte. When the waste activated sludge was mixed with the chemical sludge at ratios of 1:1 and 2:1, respectively, the dewaterability of chemical sludge improved remarkably while the relatively better dewaterability of the waste activated sludge deteriorated only to a limited extent. As the mixing ratios became 4:1 and 8:1, the dewaterability of the mixed sludge was equal to that of the waste activated sludge. The optimal polyelectrolyte dosage for the mixed sludge was equal to or less than that of the waste activated sludge. It is proposed that the chemical sludges act as skeleton builders that reduce the compressibility of the mixed sludge whose dewaterability is enhanced. Bound water contents of sludge decreased at low polyelectrolyte dosage and were not significantly affected as polyelectrolyte dosage increased. Advantages and disadvantages of co-conditioning and dewatering chemical sludge and waste activated sludge were discussed. Copyright (C) 2001 Elsevier Science Ltd.application/pdf239323 bytesapplication/pdfen-USBound water; Capillary suction time (CST); Conditioning; Dewatering; Polyelectrolyte; Sludge; Specific resistance to filtration (SRF); TanneryDewatering; Filtration; Mixing; Polyelectrolytes; Water; Chemical sludges; Zeta potential; Activated sludge process; polyelectrolyte; activated sludge; Dewatering; polyelectrolyte; sludge; activated sludge; article; conditioning; controlled study; filtration; nonhuman; priority journal; sludge dewatering; waste water management; waste water treatment plant; water content; zeta potentialjournal article10.1016/S0043-1354(00)00326-2112289782-s2.0-0035255291http://ntur.lib.ntu.edu.tw/bitstream/246246/90044/1/13.pdf