Global Patent Index - EP 1019326 A1

EP 1019326 A1 2000-07-19 - METHOD AND DEVICE FOR TREATING A HEAVILY LOADED LIQUID EFFLUENT IN PARTICULAR WITH NITROGEN AND WITH PHOSPHORUS

Title (en)

METHOD AND DEVICE FOR TREATING A HEAVILY LOADED LIQUID EFFLUENT IN PARTICULAR WITH NITROGEN AND WITH PHOSPHORUS

Title (de)

VERFAHREN UND VORRICHTUNG ZUR BEHANDLUNG VON U.A. DURCH STICKSTOFF UND PHOSPHOR SCHWER BELASTETEN ABWASSER

Title (fr)

PROCEDE ET DISPOSITIF POUR TRAITER UN EFFLUENT LIQUIDE FORTEMENT CHARGE NOTAMMENT EN AZOTE ET EN PHOSPHORE

Publication

EP 1019326 A1 (FR)

Application

EP 98942812 A

Priority

  • FR 9801881 W
  • FR 9711478 A

Abstract (en)

[origin: FR2768429A1] Removing ammonia, nitrogen and phosphate by spraying alkaline effluent through an air stream by mixing with quick lime to bring pH between 8.5 - 13. Ammonia is completely stripped from the liquid into the gas phase by recirculating through a series of cyclone sprays.- DETAILED DESCRIPTION - Effluent for treatment is first mixed with up to 1000 g/l quick lime (Ca(OH)2), either as a powder, paste or liquid, to bring its pH up to between 8.5 and 13. Alkaline effluent is then recirculated between 1 and 50 times through a series of cyclone sprays (4, 6) in an air stream, which strips out ammonia from the liquid into the gas phase. Entrained liquid is removed form the air stream before discharge and possibly further treatment in a droplet remover (9)

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

C02F 1/66; C02F 1/20

IPC 8 full level (invention and additional information)

C02F 1/20 (2006.01); C02F 1/58 (2006.01); C02F 1/66 (2006.01)

CPC (invention and additional information)

C02F 1/20 (2013.01); C02F 1/586 (2013.01); C02F 1/66 (2013.01); C02F 2101/16 (2013.01); Y10S 210/903 (2013.01)

Citation (search report)

See references of WO 9914162A1

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

FR 2768429 A1 19990319; FR 2768429 B1 19991112; CA 2304832 A1 19990325; CN 1189404 C 20050216; CN 1270573 A 20001018; EP 1019326 A1 20000719; US 6776958 B1 20040817; WO 9914162 A1 19990325

INPADOC legal status


2007-10-17 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Effective date: 20070816

2002-05-02 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: FIBAC

- Ref Legal Event Code: RAP1

2001-06-27 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20010514

2000-07-19 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000410

2000-07-19 [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

2000-07-19 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

- Free Format Text: SI PAYMENT 20000410