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1. (WO1999006327) METHOD AND DEVICE FOR PURIFYING WASTE WATER COMPRISING AN ADDITIONAL SLUDGE TREATMENT BY OZONATION

Pub. No.:    WO/1999/006327    International Application No.:    PCT/FR1998/001647
Publication Date: Feb 11, 1999 International Filing Date: Jul 24, 1998
IPC: C02F 1/34
C02F 1/36
C02F 1/78
C02F 3/12
Applicants: SOCIETE DEGREMONT
THIEBLIN, Eric
PUJOL, Roger
HAUBRY, André
Inventors: THIEBLIN, Eric
PUJOL, Roger
HAUBRY, André
Title: METHOD AND DEVICE FOR PURIFYING WASTE WATER COMPRISING AN ADDITIONAL SLUDGE TREATMENT BY OZONATION
Abstract:
The invention concerns a method for purifying waste water, whereby the waste water is subjected to a biological treatment (in 3) producing sludge, part of this sludge being recycled towards the biological treatment while being subjected to ozonation combined with mechanical stirring (in 9). A mechanical stirring energy is brought in to attack the walls of the microorganisms.