Influence of flocculation on sewage sludge thickening and dewatering

Pascal Ginisty (1) , Jérémy Olivier (2) , Jean Vaxelaire (2) , S. Fortuny (1)

1 IFTS
2 LATEP - Laboratoire de Génie Thermique Énergétique et Procédés (EA1932)

The characterization of sludge to assess in laboratory its amenability to thickening and dewatering could be respectively carried out by the drainability index and the dryness limit determination. Flocculation conditions are known to influence markedly sludge drainability and the role of main corresponding parameters: polymer nature, dosing and mixing time on drainability index was quantified. The dewaterability of 6 sludges of different origin was compared as well as the influence of 3 main operating conditions: solid load, pressure and time of expression on the dryness limit of a mineral and organic sludge.

Mots clés: sludge flocculation; bootest; drainability index; dryness limit; thickening; dewatering

Domaines: Génie des procédés

Pascal Ginisty, Jérémy Olivier, Jean Vaxelaire, S. Fortuny. Influence of flocculation on sewage sludge thickening and dewatering. 3rd European Conference on Sludge Management, Sep 2012, Leon, Spain. ⟨hal-01294328⟩