Sludge Dewatering: Influence of operating parameters on dryness limit determination

Pascal Ginisty (1) , Romain Girault (2) , Julian Tosoni (2) , Emilie Dieudé-Fauvel (2) , Jérémy Olivier (3) , Jean Vaxelaire (3)

1 IFTS
2 IRSTEA - Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture
3 LATEP - Laboratoire de Génie Thermique Énergétique et Procédés (EA1932)

Dewatering process efficiency, classically assessed by a parameter "dryness limit", is strongly, affected by conditioned sludge properties and by operating conditions. The medthod to measure its parameters is based on a filtration-compression test, which depends significantly on operating conditions. A standard method is under progess in France to develop a better controlled procedure. This paper presents the impact of solids load, pressure and compression time, filter cloth, flocculation conditions, pre-thickening and storage time on the dryness limit for different kinds of sludge. A comparison with industrial devices was also made.

Mots clés: dryness limit; sludge dewatering; flocculation; filtration-compression cell; drainage; polymer

Domaines: Génie des procédés

Pascal Ginisty, Romain Girault, Julian Tosoni, Emilie Dieudé-Fauvel, Jérémy Olivier, et al.. Sludge Dewatering: Influence of operating parameters on dryness limit determination. 4th European Conference on Sludge Management, May 2014, Izmir, Turkey. ⟨hal-01294456⟩