Multiscale texture characterization of wastewater sludges dried in a convective rig

[en] Secondary sludges from two different wastewater treatment plants are conditioned and dewatered in the same way before drying in a lab-scale convective rig at the same operating conditions. Several techniques are used to characterize the texture of the dried materials over a wide range of scales from nm up to mm. Texture and porosity of the dried products are studied by SEM imaging, nitrogen absorption isotherms (0.5 < d(p) < 50 nm), mercury porosimetry (7.5 nm < d(p) < 150 mum) and X-ray microtomography (spatial resolution= 41 mum). The image analysis of cross-sections reconstructed by microtomography also allows following shrinkage and textural evolution during drying.

Disciplines :

Chemical engineering
Mechanical engineering

Author, co-author :

Léonard, Angélique ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires - Département de chimie appliquée

Blacher, Silvia ; Université de Liège - ULiège > Département de chimie appliquée > Labo de génie chimique

Pirard, René ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique

Marchot, Pierre ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Systèmes polyphasiques

Pirard, Jean-Paul ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Génie catalytique

Crine, Michel ; Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires

Language :

English

Title :

Multiscale texture characterization of wastewater sludges dried in a convective rig

Alternative titles :

[fr] Caractérisation multi-échelle de la texture de boues séchées par une méthode convective

Publication date :

2003

Journal title :

Drying Technology

ISSN :

0737-3937

eISSN :

1532-2300

Publisher :

Marcel Dekker Inc, New York, United States - New York

Volume :

Issue :

Pages :

1507-1526

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique

Available on ORBi :

since 18 February 2009

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