Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Effects of physico-chemical factors on the viscosity evolution of anaerobic granular sludge

Abstract : The rheological properties of anaerobic granular sludge samples from four full-scale and one lab-scale anaerobic bioreactors were characterized by determining their "limit viscosity" values. These values were deducted from the evolution of the apparent viscosity of granular sludge samples (20 mL) at steady shear rate (200 s−1) recorded using rotation tests with a wings type measurement cell stirrer Anton-Parr reference: ST24-1D/2V-Q0. The limit viscosity values depended on the applied shear rate, indicating a non-Newtonian behavior of the anaerobic granular sludge types investigated. The effect of variations of physico-chemical parameters such as pH (involving surface charge change), size, surface roughness and TSS content on the evolution of the limit viscosity of an anaerobic granular sludge suspension was investigated. This showed the importance of both quantitative (number of particles in a given volume) as well as qualitative (surface charge or shape) granule-granule interactions on this rheological parameter. Moreover, the origin of the granular sludge strongly influenced the limit viscosity value according with different granules characteristics. This work confirms the ability of the rheological parameter "limit viscosity" as an overall parameter to describe the physico-chemical characteristics (TSS, granulometry, origin, and charge) of anaerobic granular sludge and showed this holds for both sieved (500 μm) and unsieved sludges.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal-unilim.archives-ouvertes.fr/hal-00653861
Contributeur : Françoise Merigaud <>
Soumis le : mardi 20 décembre 2011 - 14:26:52
Dernière modification le : lundi 24 septembre 2018 - 09:42:16

Identifiants

  • HAL Id : hal-00653861, version 1

Collections

Citation

A. Pevere, Gilles Guibaud, E. Goin, Eric D. van Hullebusch, P. Lens. Effects of physico-chemical factors on the viscosity evolution of anaerobic granular sludge. Biochemical Engineering Journal, Elsevier, 2009, 43 (3), pp.231-238. ⟨hal-00653861⟩

Partager

Métriques

Consultations de la notice

183