CORRELATIONS BETWEEN FLOC CHARACTERISTICS AND DRAINABILITY PROPERTIES: HOW TO DEFINE A GOOD FLOCCULATION ?

Pascal Ginisty (1) , Jérémy Olivier (2) , Jean Vaxelaire (2) , Vincent Lafitte (3)

1 IFTS
2 LATEP - Laboratoire de Génie Thermique Énergétique et Procédés (EA1932)
3 ENSGTI - Ecole Nationale supérieure en génie des Technologie Industrielle

Sludge conditioning is a pre-treatment to improve the removal of water during the thickening process with a wide range of commercially available products. Laboratory tests are usually needed to make the selection of a conditioner and its dosage, but mixing control is required during flocculation to obtain quantitative, repeatable and comparable data. A specific device (bootest) was developed to optimize sludge flocculation at lab scale and combines a sludge reactor for flocculation and a drainage cell. Experiments made with this device enabled to propose a " drainability index " , a useful tool to qualify a " good flocculation " for a drainage process.

Mots clés: Flocculation& Mixing systems; sludge dewatering; thickeners; laboratory filters; pretreatment chemicals; drainability index

Domaines: Génie des procédés

Pascal Ginisty, Jérémy Olivier, Jean Vaxelaire, Vincent Lafitte. CORRELATIONS BETWEEN FLOC CHARACTERISTICS AND DRAINABILITY PROPERTIES: HOW TO DEFINE A GOOD FLOCCULATION ?. 11th World Filtration Congress, Apr 2012, Graz, Austria. ⟨hal-01294306⟩