Characterisation of the residence time distribution in a continuous paddle dryer

Christophe Charlou (1) , Patricia Arlabosse (1) , Martial Sauceau (1)

1 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement

A method to determine the residence time distribution (RTD) of municipal sewage sludge in a continuous contact dryer with agitation has been developed. The experiments were conducted using a pulse injection of chloride sodium and by sampling and analysing the electrical conductivity of sludge leachate offline. The principle of this method was to trace the solid phase of sludge during drying. The accuracy and reproducibility of the method was quantified.

Mots clés: Sludge; Contact drying; Tracer experiments; Pulse injection

Domaines: Sciences de l'ingénieur [physics]

Christophe Charlou, Patricia Arlabosse, Martial Sauceau. Characterisation of the residence time distribution in a continuous paddle dryer. ECSM 2012 -3rd European Conference on Sludge Management, Sep 2012, Leon, Spain. 9 p. ⟨hal-01741829⟩