DEWATERING OF SLUDGE

• Main Authors: ZHANG, CHUNFA, LIU, LUOMING, LI, GUOSONG
• Format: Patent
• Language: English; French
• Published: 29.10.2015
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; IMPREGNATING OR COATING OF PAPER; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to a process for dewatering aqueous sludge comprising the steps of (a) adding to the aqueous sludge (i) a Fe(lll)salt; and (ii) a cationic polymer; (b) allowing floe formation; and (c) filtrating the composition obtained in step (b). L'invention concerne un procédé de déshydratation d'une boue aqueuse, comprenant les étapes consistant à : (a) ajouter à la boue aqueuse (i) un sel de Fe (III) et (ii) un polymère cationique ; (b) permettre la formation d'un floculat ; et (c) filtrer la composition obtenue à l'étape (b).