Global patent index - EP 1056689 A1

EP 1056689 A1 2000-12-06 - METHOD FOR BIOLOGICALLY TREATING EFFLUENTS PRODUCING LITTLE OR NO EXCESS SLUDGE INCLUDING A TREATING STEP BY FIXED FILM BIOMASS

Title (en)

METHOD FOR BIOLOGICALLY TREATING EFFLUENTS PRODUCING LITTLE OR NO EXCESS SLUDGE INCLUDING A TREATING STEP BY FIXED FILM BIOMASS

Title (de)

BIOLOGISCHES ABWASSERREINIGUNGSVERFAHREN OHNE ÜBERSCHUSSBELEBTSCHLAMMPRODUKTION UNTER VERWENDUNG EINES BEHANDLUNGSCHRITTES MIT SESSILER BIOMASSE

Title (fr)

PROCEDE DE TRAITEMENT BIOLOGIQUE D'EFFLUENTS NE PRODUISANT PAS OU PEU DE BOUES EN EXCES INCLUANT UNE ETAPE DE TRAITEMENT PAR BIOMASSE FIXEE

Publication

EP 1056689 A1 (FR)

Application

EP 99903772 A

Priority

  • FR 9900349 W
  • FR 9802043 A
  • FR 9802935 A

Abstract (en)

[origin: WO9941205A1] The invention concerns a method for treating an effluent in order to purify it comprising at least one step of biological treatment (1) leading to the production of biological sludge. The invention is characterised in that at least part of the biomass used during said biological treatment step is fixed on a support and it comprises at least a step (2) which consists in subjecting at least one part of said sludge derived from said biological treatment step a conditioning aiming at improving its biodegradibility and a step (3) consisting in re-routing the resulting conditioned sludge towards said biological treatment step.

IPC 1-7 (main, further and additional classification)

C02F 3/12; C02F 1/02; C02F 1/36; C02F 1/78; C02F 3/06; C02F 3/30

IPC 8 full level (invention and additional information)

C02F 1/02 (2006.01); C02F 1/36 (2006.01); C02F 3/06 (2006.01); C02F 3/12 (2006.01); C02F 3/30 (2006.01); C02F 1/78 (2006.01)

CPC (invention and additional information)

C02F 3/085 (2013.01); C02F 1/025 (2013.01); C02F 1/36 (2013.01); C02F 3/06 (2013.01); C02F 3/12 (2013.01); C02F 3/1221 (2013.01); C02F 3/302 (2013.01); C02F 1/78 (2013.01); Y02W 10/15 (2015.05)

Citation (search report)

See references of WO 9941205A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9941205 A1 19990819; AU 2430499 A 19990830; EP 1056689 A1 20001206; FR 2781785 A1 20000204; FR 2781785 B1 20000929

INPADOC legal status

2010-10-20 [18R] REFUSED

- Ref Legal Event Code: 18R

- Effective date: 20100607

2003-04-23 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20030305

2003-01-22 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: OTV SA

- Ref Legal Event Code: RAP1

2000-12-06 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000707

2000-12-06 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE