Global Patent Index - EP 1240109 A1

EP 1240109 A1 2002-09-18 - METHODS FOR TREATING WASTEWATER SLUDGE

Title (en)

METHODS FOR TREATING WASTEWATER SLUDGE

Title (de)

VERFAHREN ZUR BEHANDLUNG VON KLÄRSCHLAMM

Title (fr)

PROCEDES DE TRAITEMENT DE BOUES D'EPURATION

Publication

EP 1240109 A1 (EN)

Application

EP 00980489 A

Priority

  • US 0031658 W
  • US 16996299 P
  • US 17602100 P

Abstract (en)

[origin: WO0142151A1] This invention relates to methods for treating wastewater sludge cake with acid and calcium carbonate under acidic, low heat conditions to produce a stable, soil-like or granular, finished product containing calcium carbonate, useful as a nitrogen fertilizer, synthetic soil component or soil conditioner for pH control.

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

C02F 11/12; C02F 11/14; C05D 3/02; C05F 7/00

IPC 8 full level (invention and additional information)

C02F 11/12 (2006.01); C02F 11/14 (2006.01); C05F 7/00 (2006.01); C02F 1/66 (2006.01)

CPC (invention and additional information)

C02F 11/12 (2013.01); C02F 11/14 (2013.01); C05F 7/00 (2013.01); C02F 1/66 (2013.01); Y02A 40/213 (2018.01)

Citation (search report)

See references of WO 0142151A1

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 0142151 A1 20010614; WO 0142151 A9 20020530; AU 1774301 A 20010618; CA 2393948 A1 20010614; EP 1240109 A1 20020918

INPADOC legal status


2013-06-05 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20121212

2006-03-01 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION)

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

2003-04-02 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030219

2002-09-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020708

2002-09-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

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

2002-09-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI