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Characterization of synthetic and activated sludge and conditioning with cationic polyelectrolytes |
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| Authors: | Tan Phong Nguyen Nidal Hilal Nicholas P Hankins John T Novak |
| Affiliation: | aCentre for Clean Water Technologies, School of Chemical, Environmental and Mining Engineering, The University of Nottingham, Nottingham, NG7 2RD, UK bCentre for Sustainable Water Engineering, Department of Engineering Science, The University of Oxford, Parks Road, Oxford OX1 3PJ, UK cDepartment of Civil & Environmental Engineering, Virginia Tech, Blacksburg, Virginia 24061, USA |
| Abstract: | This study investigates the effect of cationic polyelectrolytes on the final properties of synthetic and activated sludge. Synthetic sludge was prepared according to established procedures. Activated sludge was produced in a labscale, continuous-flow reactor which was fed with live activated sludge from a waste-water treatment plant. Capillary suction time (CST) was used to evaluate the sludge dewatering behaviour. The results from experiments indicated that the cationic polyelectrolytes had a critical effect on sludge dewatering, and made an improvement in the final properties of sludge. The two types of sludge have very similar dewatering characteristics after cationic polymer conditioning. The development of synthetic sludge is suggested also to be a possible surrogate for studying the final properties of activated sludge. |
| Keywords: | Synthetic sludge Activated sludge Polyelectrolytes Sludge properties |
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