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1. (WO1998049108) DEWATERING OF SEWAGE SLUDGE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/049108 International Application No.: PCT/GB1998/001269
Publication Date: 05.11.1998 International Filing Date: 30.04.1998
Chapter 2 Demand Filed: 19.11.1998
IPC:
C02F 1/00 (2006.01) ,C02F 11/14 (2006.01)
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1
Treatment of water, waste water, or sewage
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
11
Treatment of sludge; Devices therefor
12
by de-watering, drying, or thickening
14
with addition of chemical agents
Applicants:
CIBA SPECIALTY CHEMICALS WATER TREATMENTS LIMITED [GB/GB]; Cleckheaton Road Low Moor Bradford West Yorkshire BD12 0JZ, GB (AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, CA, CF, CG, CH, CI, CM, CN, CU, CY, CZ, DE, DK, EE, ES, FI, FR, GA, GB, GE, GH, GM, GN, GR, GW, HU, ID, IE, IL, IS, IT, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MC, MD, MG, MK, ML, MN, MR, MW, MX, NE, NL, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW)
WINN, Edward, H. [US/US]; US (UsOnly)
HUNTER, Dewey, W. [US/US]; US (UsOnly)
Inventors:
WINN, Edward, H.; US
HUNTER, Dewey, W.; US
Agent:
CIBA SPECIALTY CHEMICALS WATER TREATMENTS LIMITED; UK Patent Dept. Cleckheaton Road Low Moor Bradford West Yorkshire BD12 0JZ, GB
Priority Data:
60/044,43730.04.1997US
Title (EN) DEWATERING OF SEWAGE SLUDGE
(FR) DESHYDRATATION DE BOUES D'EPURATION
Abstract:
(EN) A sludge treatment plant in which sludge is flocculated and then dewatered to form a cake and a reject liquor is modified by recycling 3 to 40 % of the reject liquor into the sludge immediately before the dewatering process.
(FR) Installation de traitement de boues dans laquelle ces boues sont floculées, puis déshydratées afin de produire un pain, et dans laquelle une liqueur de rejet est modifiée par recyclage de 3 à 40 % de ladite liqueur vers l'intérieur de la boue immédiatement avant l'opération de déshydratation.
front page image
Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0979215US6447687CA2287996AU1998072232