Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO2018004582) PROCESS FOR SELENIUM REMOVAL WITH BIOLOGICAL, CHEMCIAL AND MEMBRANE TREATMENT
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2018/004582 International Application No.: PCT/US2016/040264
Publication Date: 04.01.2018 International Filing Date: 30.06.2016
IPC:
C02F 9/00 (2006.01) ,B01D 61/14 (2006.01) ,B01D 61/16 (2006.01) ,B01D 61/58 (2006.01) ,C02F 101/10 (2006.01) ,C02F 103/18 (2006.01) ,C02F 1/56 (2006.01) ,C02F 1/44 (2006.01) ,C02F 3/28 (2006.01)
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
9
Multistep treatment of water, waste water or sewage
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
61
Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
14
Ultrafiltration; Microfiltration
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
61
Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
14
Ultrafiltration; Microfiltration
16
Feed pretreatment
B PERFORMING OPERATIONS; TRANSPORTING
01
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
D
SEPARATION
61
Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
58
Multistep processes
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
101
Nature of the contaminant
10
Inorganic compounds
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
103
Nature of the water, waste water, sewage or sludge to be treated
18
from the wet purification of gaseous effluents
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
54
using organic material
56
Macromolecular compounds
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
44
by dialysis, osmosis or reverse osmosis
C CHEMISTRY; METALLURGY
02
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
F
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3
Biological treatment of water, waste water, or sewage
28
Anaerobic digestion processes
Applicants:
BL TECHNOLOGIES, INC. [US/US]; 5951 Clearwater Drive Minnetonka, MN 55343, US
Inventors:
SYED, Wajahat Hussain; CA
Agent:
BORDEN LADNER GERVALS LLP; CA
Priority Data:
Title (EN) PROCESS FOR SELENIUM REMOVAL WITH BIOLOGICAL, CHEMCIAL AND MEMBRANE TREATMENT
(FR) PROCÉDÉ D’ÉLIMINATION DE SÉLÉNIUM PAR TRAITEMENT BIOLOGIQUE, CHIMIQUE ET PAR MEMBRANE
Abstract:
(EN) Water containing selenium, for example flue gas desulfurization (FGD) blowdown water is treated with a combination of biological and chemical treatment and membrane filtration. The biologically treated water is dosed with a dithiocarbamate compound and flocculated prior to membrane filtration. Optionally, the treatment may be enhanced with one or more adsorptive agents prior to, or in conjunction with, membrane filtration. Membrane concentrate may be re-circulated to one or more biological treatment zones. The biological treatment may be by way of suspended growth, fixed growth on a moving bed, or both. One or more biological treatment zones may be controlled considering their oxygen reduction potential (ORP). Optionally, the biological treatment includes an aerobic zone following one or more anoxic or anaerobic zones. The non-aerobic zones remove selenium and optionally nitrogen and sulfur. The aerobic zone removes carbon, which may include carbon added as a nutrient in a non-aerobic zone.
(FR) Selon la présente invention, l'eau contenant du sélénium, par exemple l'eau de purge de désulfuration de gaz de carneau (FGD), est traitée avec une combinaison de traitement biologique et chimique et de filtration sur membrane. L'eau traitée biologiquement est dosée avec un composé de dithiocarbamate et floculée avant la filtration sur membrane. De manière facultative, le traitement peut être amélioré avec un ou plusieurs agents d'adsorption avant la filtration sur membrane ou conjointement avec cette dernière. Un concentré de membrane peut être remis en circulation vers une ou plusieurs zones de traitement biologique. Le traitement biologique peut se faire par croissance en suspension, croissance fixe sur un lit mobile, ou les deux. Une ou plusieurs zones de traitement biologique peuvent être contrôlées en tenant compte de leur potentiel de réduction d'oxygène (ORP). De manière facultative, le traitement biologique comprend une zone aérobie suivant une ou plusieurs zones anoxiques ou anaérobies. Les zones non aérobies éliminent le sélénium et, de manière facultative, l'azote et le soufre. La zone aérobie élimine le carbone, qui peut comprendre du carbone ajouté en tant que nutriment dans une zone non aérobie.
front page image
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, 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, IR, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, 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, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, 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, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)