EP 1240108 A1 20020918 - METHOD AND INSTALLATION FOR TREATING EFFLUENTS, COMPRISING AN ADDITIONAL TREATMENT OF THE SLUDGE BY OZONISATION
Title (en)
METHOD AND INSTALLATION FOR TREATING EFFLUENTS, COMPRISING AN ADDITIONAL TREATMENT OF THE SLUDGE BY OZONISATION
Title (de)
VERFAHREN UND VORRICHTUNG ZUR ABWASSERBEHANDLUNG MIT EINER ZUSÄTZLICHEN SCHLAMMBEHANDLUNG DURCH OZON
Title (fr)
PROCEDE ET INSTALLATION DE TRAITEMENT D'EAUX RESIDUAIRES COMPRENANT UN TRAITEMENT ADDITIONNEL DES BOUES PAR OZONATION
Publication
Application
Priority
- FR 0002973 W 20001025
- FR 9915427 A 19991207
Abstract (en)
[origin: WO0142150A1] The inventive method is characterized in that it comprises a stage in which the sludge from the biological treatment stage or the separation stage is degraded. During said degradation stage, the sludge is brought into contact with an ozonised gas in conditions in which it is possible to obtain a floc consisting of granules with an average size of over 200 microns and a level of volatile matter of between 50 and 65 %, the thickening factor of the granular sludge after a decantation of 30 minutes always being greater than 4. The granular sludge is obtained by: treating between 0.1 and 2, preferably between 0.1 and 1.5 times the mass of sludge present in the biological treatment stage; and applying a dose of ozone of between 3 and 100 grams ozone per kilogram suspended matter (SM) treated, preferably between 4 and 10 grams of ozone per kilo of suspended matter (SM) treated.
IPC 1-7
IPC 8 full level
B01F 3/04 (2006.01); B01F 7/00 (2006.01); C02F 3/12 (2006.01); C02F 11/06 (2006.01)
CPC (source: EP US)
C02F 3/1221 (2013.01 - EP US); C02F 11/06 (2013.01 - EP US); Y02W 10/10 (2015.05 - EP US)
Citation (search report)
See references of WO 0142150A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0142150 A1 20010614; AU 1034901 A 20010618; BR 0016220 A 20020910; CA 2394359 A1 20010614; CA 2394359 C 20081223; DE 1240108 T1 20030306; EP 1240108 A1 20020918; ES 2180462 T1 20030216; FR 2801880 A1 20010608; FR 2801880 B1 20020222; JP 2004501739 A 20040122; US 6780319 B1 20040824
DOCDB simple family (application)
FR 0002973 W 20001025; AU 1034901 A 20001025; BR 0016220 A 20001025; CA 2394359 A 20001025; DE 00971503 T 20001025; EP 00971503 A 20001025; ES 00971503 T 20001025; FR 9915427 A 19991207; JP 2001543454 A 20001025; US 14807702 A 20020628