Global patent index - EP 0946435 A4

EP 0946435 A4 2000-01-26 - SLUDGE DEWATERING CONTROL SYSTEM

Title (en)

SLUDGE DEWATERING CONTROL SYSTEM

Title (de)

KONTROLSYSTEM ZUR SCHLAMMENTWÄSSERUNG

Title (fr)

PROCEDE DE CONTROLE DE LA DESHYDRATATION D'UNE BOUE

Publication

EP 0946435 A4 (EN)

Application

EP 97909064 A

Priority

  • AU 9700723 W
  • AU PO328596 A

Abstract (en)

[origin: WO9818730A1] A sludge dewatering control system (10) which relies on a determination of sludge structure after addition of an additive as a predictor of dewaterability of said sludge by dewatering means. The system (10) relies on a method of control of dewatering of sludge, the method comprising obtaining a relationship (25) between particle structure and cake solids content of the sludge (15), continuously monitoring the particle structure of the sludge so as to provide a continuous determination of the cake solids content of the sludge and adding an additive to the sludge as a function of the cake solids content so as to control the dewatering characteristics of the sludge (15). Sludge structure is determined by reference to fractal dimension of the particles making up the sludge.

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

C02F 11/14

IPC 8 full level (invention and additional information)

C02F 11/14 (2006.01); G01N 15/02 (2006.01)

CPC (invention and additional information)

C02F 11/14 (2013.01); G01N 15/0205 (2013.01)

Citation (search report)

Designated contracting state (EPC)

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

EPO simple patent family

WO 9818730 A1 19980507; AU PO328596 D0 19961121; CA 2270207 A1 19980507; EP 0946435 A1 19991006; EP 0946435 A4 20000126; JP 2001502601 A 20010227; KR 20000052923 A 20000825; NO 992070 A 19990611; NO 992070 D0 19990429

INPADOC legal status

2000-11-15 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20000919

2000-01-26 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 19991210

2000-01-26 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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

1999-10-06 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 19990506

1999-10-06 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

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