Characterization of synthetic and activated sludge and conditioning with cationic polyelectrolytes

Tan Phong Nguyen, Nidal Hilal, Nicholas P. Hankins, John T. Novak

Research output: Contribution to journalArticle

29 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)103-110
Number of pages8
Issue number1-3
Publication statusPublished - 30 Jul 2008
Externally publishedYes



  • Activated sludge
  • Polyelectrolytes
  • Sludge properties
  • Synthetic sludge

ASJC Scopus subject areas

  • Filtration and Separation

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