Effect of inoculum and sludge concentration of viscosity evolution of anaerobic granular sludges

A. Pevere, G. Guibaud, E.D. van Hullebusch, P.N.L. Lens, M. Baudu

Research output: Contribution to journalArticleAcademicpeer-review

7 Citations (Scopus)


The rheological behaviour of granular sludges (diameter 20-315 ¿m) originating from different anaerobic reactors was carried out using rotation tests. The sieved granular sludges suspensions display a non-Newtonian rheological behaviour and the limit viscosity was therefore used as a rheological parameter. The values obtained, which depend on the shear rate used, were strongly influenced by the total suspended solids (TSS) content of granular sludge and an exponential relation was found between the TSS and the rheological parameter limit viscosity. The increase of viscosity as a function of TSS content of the granular sludge as well as the increase of granule size underlines the importance of the interaction between granules in the evolution of this rheological parameter. Significant differences in granular sludge limit viscosity were found for granular sludge of different origins. All measurements performed with 10 g·l-1 TSS granular sludge indicate the ability of the chosen rheological parameter to describe different granular sludge quality.
Original languageEnglish
Pages (from-to)509-514
JournalWater Science and Technology
Issue number1-2
Publication statusPublished - 2005


  • sludges
  • anaerobic treatment
  • rheological properties
  • digestion
  • viscosity
  • waste water treatment
  • granules
  • rheological characterization
  • sewage sludges
  • reactors
  • sorption
  • nickel
  • cobalt
  • uasb


Dive into the research topics of 'Effect of inoculum and sludge concentration of viscosity evolution of anaerobic granular sludges'. Together they form a unique fingerprint.

Cite this