Reference : Wastewater sludge convective drying: Influence of sludge origin
Scientific journals : Article
Engineering, computing & technology : Chemical engineering
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/5253
Wastewater sludge convective drying: Influence of sludge origin
English
[fr] Séchage convectif de boues d'épuration : influence de l'origine des boues
Léonard, Angélique mailto [Université de Liège > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires - Département de chimie appliquée >]
Vandevenne, P. [> > > >]
Salmon, Thierry mailto [Université de Liège - ULg > Département de chimie appliquée > Département de chimie appliquée >]
Marchot, Pierre mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Systèmes polyphasiques >]
Crine, Michel mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires >]
Sep-2004
Environmental Technology
Selper Ltd, Publications Div
25
9
1051-1057
Yes (verified by ORBi)
International
0959-3330
London
[en] wastewater treatment ; sludge management ; X-ray microtomography ; thermal drying ; rheology
[en] This paper deals with thermal drying of wastewater sludges, whose management will become crucial in the forthcoming years. Sludges collected after mechanical dewatering in 5 different WWTPs are submitted to the same convective drying treatment in order to try finding some relations between the drying behaviours, the type of effluent and wastewater treatments. Results show clearly sludge drying remains a particularly complex operation because sludges may exhibit very different behaviours, both from kinetic and texture points of view. Initial moisture content and global composition are not sufficient to explain the different observed behaviours. It is too early to claim one or another type of water treatment has an influence on the drying behaviour. However, the drying rates can be classified in the inverse order of the organic content. Moreover for sludges at the same siccities, the harder the material (rheological properties), the higher the drying rate. Final textural properties can be related to the rheological properties and the internal diffusion limitations lowering the drying intensity.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
http://hdl.handle.net/2268/5253

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