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1. WO2000037369 - SUBMERGED MEMBRANE BIOREACTOR FOR TREATMENT OF NITROGEN CONTAINING WATER

Publication Number WO/2000/037369
Publication Date 29.06.2000
International Application No. PCT/CA1999/001205
International Filing Date 17.12.1999
Chapter 2 Demand Filed 30.06.2000
IPC
C02F 1/00 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
C02F 1/44 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
44by dialysis, osmosis or reverse osmosis
C02F 3/00 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3Biological treatment of water, waste water, or sewage
C02F 3/12 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3Biological treatment of water, waste water, or sewage
02Aerobic processes
12Activated sludge processes
C02F 3/20 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3Biological treatment of water, waste water, or sewage
02Aerobic processes
12Activated sludge processes
20using diffusers
C02F 3/22 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
3Biological treatment of water, waste water, or sewage
02Aerobic processes
12Activated sludge processes
22using circulation pipes
CPC
C02F 1/444
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
44by dialysis, osmosis or reverse osmosis
444by ultrafiltration or microfiltration
C02F 2101/16
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2101Nature of the contaminant
10Inorganic compounds
16Nitrogen compounds, e.g. ammonia
C02F 2209/006
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2209Controlling or monitoring parameters in water treatment
005Processes using a programmable logic controller [PLC]
006comprising a software program or a logic diagram
C02F 2209/04
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2209Controlling or monitoring parameters in water treatment
04Oxidation reduction potential [ORP]
C02F 2209/14
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2209Controlling or monitoring parameters in water treatment
14NH3-N
C02F 2209/15
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2209Controlling or monitoring parameters in water treatment
15N03-N
Applicants
  • ZENON ENVIRONMENTAL INC. [CA]/[CA] (AllExceptUS)
  • OMNIUM DE TRAITEMENT ET DE VALORISATION [FR]/[FR] (AllExceptUS)
  • BEHMANN, Henry [CA]/[CA] (UsOnly)
  • HUSAIN, Hidayat [CA]/[CA] (UsOnly)
  • BUISSON, Hervé [FR]/[FR] (UsOnly)
  • PAYRAUDEAU, Michele [FR]/[FR] (UsOnly)
Inventors
  • BEHMANN, Henry
  • HUSAIN, Hidayat
  • BUISSON, Hervé
  • PAYRAUDEAU, Michele
Agents
  • BERESKIN & PARR
Priority Data
2,256,98918.12.1998CA
60/113,24921.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SUBMERGED MEMBRANE BIOREACTOR FOR TREATMENT OF NITROGEN CONTAINING WATER
(FR) BIOREACTEUR A MEMBRANE IMMERGE DESTINE AU TRAITEMENT D'EAU CONTENANT DE L'AZOTE
Abstract
(EN)
A single tank submerged membrane bioreactor for treating feed water having unacceptable levels of ammonia or total nitrogen has both a membrane scouring bubble supply and an oxygenating bubble supply. The membrane scouring bubble supply continuously provides large scouring bubbles to clean the membranes. Permeate is continuously withdrawn from the membranes at a high rate but the large scouring bubbles do not transfer sufficient oxygen to the mixed liquor to create aerobic conditions in the reactor. The oxygenating bubble supply is operated to provide small bubbles of air or oxygen that intermittently produce aerobic conditions in a significant part of the mixed liquor. Alternating aerobic and anoxic conditions occur in a significant portion of the tank suitable for nitrification and denitrification. The level of dissolved oxygen (DO) or oxygen reduction potential (ORP) in the tank is measured by sensors and determines when the oxygenating bubble supply will be turned on or off between set minimum and maximum time limits.
(FR)
Un bioréacteur à membrane immergé dans un seul réservoir destiné au traitement d'une eau d'alimentation présentant des niveaux inacceptables d'ammoniaque ou d'azote total présente à la fois une alimentation en bulles de lavage à membrane et une alimentation en bulles d'oxygénation. L'alimentation en bulles de lavage à membrane produit en continu de grosses bulles de lavage afin de nettoyer les membranes. Le perméat est retiré de façon continue des membranes à haut débit mais les grosses bulles de lavage ne transfèrent pas suffisamment d'oxygène dans la liqueur mélangée pour créer des conditions aérobies dans le réacteur. L'alimentation en bulles d'oxygénation est exploitée pour produire des petites bulles d'air ou d'oxygène produisant, de façon intermittente, des conditions aérobies dans une partie significative de la liqueur mélangée. Des conditions aérobies et anoxiques alternées se produisent dans une partie importante du réservoir apte à la nitrification et la dénitrification. Le niveau d'oxygène dissous (OD) ou de potentiel de réduction d'oxygène (PRO) dans le réservoir est mesuré par des détecteurs et il détermine quand l'alimentation en bulles d'oxygénation doit être mise en marche ou coupée entre des limites définies de temps minimum et maximum.
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