ORBi: Léonard Angélique - Convective drying of wastewater sludges: Influence of air temperature, superficial velocity, and humidity on the kinetics

Reference : Convective drying of wastewater sludges: Influence of air temperature, superficial veloc...


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Mechanical engineering Engineering, computing & technology : Chemical engineering
	To cite this reference:	http://hdl.handle.net/2268/5500

Title :	Convective drying of wastewater sludges: Influence of air temperature, superficial velocity, and humidity on the kinetics
Language :	English
Alternative title :	[fr] Séchage convectif de boues d'épuration : influence de la température, de la vitesse superficielle et de l'humidité de l'air sur la cinétique
Author, co-author :	Léonard, Angélique [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires - Département de chimie appliquée >]
	Blacher, Silvia [Université de Liège - ULg > Département de chimie appliquée > Labo de génie chimique > >]
	Marchot, Pierre [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Systèmes polyphasiques >]
	Pirard, Jean-Paul [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
	Crine, Michel [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Opérations physiques unitaires >]
Publication date :	2005
Journal title :	Drying Technology
Publisher :	Taylor & Francis Inc
Volume :	23
Issue/season :	8
Pages :	1667-1679
Audience :	International
ISSN :	0737-3937
City :	Philadelphia
Keywords :	[en] convective drying ; sludge ; transfer coefficients ; kinetics ; evaporation capacity
Abstract :	[en] The influence of air temperature, velocity, and humidity during convective drying of two different sludges (A and B) is investigated through a 3 3 factorial design. For sludge A, a constant drying flux period is observed, while sludge B is characterized by a long decreasing drying flux phase. A sensitivity analysis shows that temperature is the main operating parameter affecting the drying kinetics. Mass and heat transfer coefficients as well as water evaporation capacities are calculated from drying curves. Transfer coefficients are related to operating conditions through dimensionless relations. For both sludges, a linear relation is found between water evaporation capacity and the maximal measured drying flux.
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Permalink :	http://hdl.handle.net/2268/5500

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