Rheological characteristics of highly concentrated anaerobic digested sludge

Abstract : Highly concentrated anaerobic sludge digestion is a favorable way to treat a considerable quantity of sewage sludge and recover biogas from both environmental and energetic point of view. For enhancing mass transfer and ensuring efficient anaerobic digestion, pumping and mixing are crucial operations which are directly conditioned by the rheology of sludge. The present work aims at studying the rheological characteristics of highly concentrated anaerobic digested sludge with TS (total solid) content more than 8%. The dependence on both TS content and temperature is investigated, respectively, in dynamic and flow measurements. The results show a shear-thinning behavior with a yield stress under flow measurements and a viscoelastic property in dynamic measurements, comparable to a pasty material. The Herschel-Bulkley model can describe these experimental results and a master curve is then proposed. In addition, the yield stress as well as cohesion energy increase with TS content following a power-law. The effect of temperature is relatively smaller, as a consequence of pronounced internal interactions strengthening the interior structure after the digestion, in the form of networks and steric linking.
Type de document :
Article dans une revue
Biochemical Engineering Journal, Elsevier, 2014, 86, pp.57-61. 〈10.1016/j.bej.2014.03.007〉
Domaine :
Liste complète des métadonnées

https://hal.univ-lorraine.fr/hal-01275413
Contributeur : Lrgp Ul <>
Soumis le : mercredi 17 février 2016 - 14:11:45
Dernière modification le : vendredi 15 juin 2018 - 11:22:01

Identifiants

Collections

Citation

Jiankai Jiang, Jing Wu, Souhila Poncin, Huai Z. Li. Rheological characteristics of highly concentrated anaerobic digested sludge. Biochemical Engineering Journal, Elsevier, 2014, 86, pp.57-61. 〈10.1016/j.bej.2014.03.007〉. 〈hal-01275413〉

Partager

Métriques

Consultations de la notice

37