ORBi: Léonard Angélique - Influence of Back Mixing on the Convective Drying of Residual Sludges in a Fixed Bed

Reference : Influence of Back Mixing on the Convective Drying of Residual Sludges in a Fixed Bed


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Chemical engineering Life sciences : Environmental sciences & ecology
	To cite this reference:	http://hdl.handle.net/2268/5057

Title :	Influence of Back Mixing on the Convective Drying of Residual Sludges in a Fixed Bed
Language :	English
Alternative title :	[fr] Influence du rétro-mélange sur le séchage convectif de boues d'épuration
Author, co-author :	Léonard, Angélique [Université de Liège > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires - Département de chimie appliquée >]
	Meneses, Eustedio [> > > >]
	Le Trong, Emmanuel [> > > >]
	Salmon, Thierry [Université de Liège - ULg > Département de chimie appliquée > Département de chimie appliquée >]
	Marchot, Pierre [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Systèmes polyphasiques >]
	Toye, Dominique [Université de Liège - ULg > Département de chimie appliquée > Génie de la réaction et des réacteurs chimiques >]
	Crine, Michel [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires >]
Publication date :	10-Feb-2008
Journal title :	Water Research
Volume :	42
Issue/season :	10-11
Pages :	2671-2677
Audience :	International
ISSN :	0043-1354
Abstract :	[en] The influence of a backmixing operation on the convective belt drying of two wastewater sludges was studied. The expansion of the sludge extrudates bed due to increasing additions of dry product was quantified by using X-ray tomography. This non-invasive technique was used to determine the bed porosity and the total exchange area available for heat and mass transfers, for increasing levels of backmixing. For a same drying flux, the expansion of the drying bed leads to higher drying rates, allowing a reduction of the total drying time. In this context, rheological properties of the sludges are key properties.
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Permalink :	http://hdl.handle.net/2268/5057
DOI :	10.1016/j.watres.2008.01.020

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