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1. (WO2010073222) QUICK STATIC DECANTER FOR PRETHICKENING WATER TREATMENT SLUDGE, AND PLANT INCLUDING SUCH A DECANTER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/073222 International Application No.: PCT/IB2009/055928
Publication Date: 01.07.2010 International Filing Date: 23.12.2009
IPC:
B01D 21/20 (2006.01) ,C02F 11/12 (2006.01) ,C02F 1/42 (2006.01) ,C02F 1/52 (2006.01) ,C02F 1/00 (2006.01) ,B01D 21/32 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
21
Separation of suspended solid particles from liquids by sedimentation
18
Construction of the scrapers or the driving mechanisms for settling tanks
20
Driving mechanisms
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
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
42
by ion-exchange
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
52
by flocculation or precipitation of suspended impurities
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
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
21
Separation of suspended solid particles from liquids by sedimentation
30
Control equipment
32
Density control of clear liquid or sediment, e.g. optical control
Applicants:
DEGREMONT [FR/FR]; 183 avenue du 18 Juin 1940 F-92500 Rueil Malmaison, FR (AllExceptUS)
DESCAMPS, Patrick [FR/FR]; FR (UsOnly)
PREVOT, Claude [FR/FR]; FR (UsOnly)
HAUBRY, André [FR/FR]; FR (UsOnly)
Inventors:
DESCAMPS, Patrick; FR
PREVOT, Claude; FR
HAUBRY, André; FR
Agent:
MICHARDIERE, Bernard; Cabinet Armengaud 3, Avenue Bugeaud F-75116 Paris, FR
Priority Data:
080744524.12.2008FR
Title (EN) QUICK STATIC DECANTER FOR PRETHICKENING WATER TREATMENT SLUDGE, AND PLANT INCLUDING SUCH A DECANTER
(FR) DECANTEUR STATIQUE RAPIDE POUR PRE-EPAISSISSEMENT DES BOUES DE TRAITEMENT D'EAU, ET INSTALLATION COMPORTANT UN TEL DECANTEUR.
Abstract:
(EN) The invention relates to a static decanter (D) for prethickening liquid sludge in a water treatment plant, in particular wastewater, comprising an inclined bottom (8), the decanter being provided with a liquid sludge supply pump (13), a device for injecting a polymer in the liquid sludge, an overspill discharge (23) and a pump (26) for extracting the prethickened sludge from the decanter. The decanter further includes a means for accelerating the sludge decantation, a means (M) for adjusting the concentration of suspended material in the prethickened sludge at the outlet, and capable of maintaining the concentration of the prethickened sludge extracted from the decanter at a substantially constant level despite the concentration variations at the inlet, and a means (M3) for adjusting the level of the sludge blanket (V) and capable of maintaining said level at the lowest possible level.
(FR) Décanteur statique (D), pour pré-épaissir les boues liquides dans une installation de traitement d'eau, en particulier d'eaux usées, comportant un fond incliné (8), ce décanteur étant équipé d'une pompe d'alimentation (13) en boues liquides, d'un dispositif d'injection de polymère dans les boues liquides, d'un rejet de surverse (23) et d'une pompe d'extraction (26) des boues pré¬ épaissies du décanteur; il comporte des moyens pour accélérer la décantation des boues, des moyens de régulation (M) de la concentration en matières en suspension en sortie, des boues pré-épaissies, propres à maintenir sensiblement constante la concentration des boues pré-épaissies extraites du décanteur, malgré les variations de concentrations en entrée, et des moyens de régulation (M3) du niveau du voile de boue (V) propres à maintenir ce niveau le plus bas possible.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: French (FR)
Filing Language: French (FR)
Also published as:
EP2370194US20110272346CN102264445RU2011130809CA2750849RU0002501742
BRPI0923619FR2940270IN4855/DELNP/2011