Patent application number | Description | Published |
20080197075 | REMOVING MERCURY AND OTHER HEAVY METALS FROM INDUSTRIAL WASTEWATER - A method of removing one or more heavy metals including mercury from industrial wastewater by use of a filtration and/or a solid-liquid separation system by use of a water soluble ethylene dichloride ammonia polymer. | 08-21-2008 |
20080271758 | METHOD OF CLEANING FOULED AND/OR SCALED MEMBRANES - A method of cleaning a fouled and/or scaled UF or MF membrane with a solution containing one or more thermo-responsive polymers is disclosed. More specifically, the method comprises: (a) treating the membrane in a membrane separation system with a solution containing one or more TRP, wherein said TRP is soluble in said solution and at least an effective amount of said TRP diffuses into a foulant layer that is present on the surface and/or in pores of said membrane; (b) making insoluble said TRP diffused into said foulant layer; (c) optionally rinsing the membrane; (d) optionally backwashing the membrane with air and/or liquid between the steps (b) and (c); and (e) optionally backwashing the membrane with air and/or liquid after the membrane is rinsed in step (c). | 11-06-2008 |
20090095678 | PURIFICATION OF OIL SANDS POND WATER - A method of enhancing flux of tailings settling pond water from an oil sands process through a membrane separation system and purifying the water comprising is disclosed. The process comprises the following steps: (a) treating the water with an effective amount of one or more water-soluble cationic polymers, amphoteric polymers, zwitterionic polymers, or a combination thereof; (b) passing the treated water through a membrane separation system; and (c) optionally, passing the permeate from step (b) through an additional membrane separation system. | 04-16-2009 |
20090272691 | METHOD OF CONDITIONING A MIXED LIQUOR CONTAINING NONIONIC POLYSACCHARIDES AND/OR NONIONIC ORGANIC MOLECULES - A method of conditioning a membrane biological reactor mixed liquor containing one or more nonionic polysaccharides and/or one or more organic molecules is disclosed. | 11-05-2009 |
20100051559 | METHOD FOR INHIBITING SCALE FORMATION AND DEPOSITION IN MEMBRANE SYSTEMS VIA THE USE OF AN AA-AMPS COPOLYMER - A method of inhibiting scale formation and deposition from a feed stream passing through a membrane system is disclosed. The method comprises: (a) controlling the pH of said feed stream within the range between about 7.0 and about 8.2; (b) optionally controlling the temperature of said feed stream within the range between about 5° C. to about 40° C. when the membrane system is an RO system, a NF system, an ED system, an EDI system or a combination thereof; (c) optionally controlling the temperature of said feed stream within the range between about 40° C. and about 80° C. when the membrane system is an MD system; and (d) adding an effective amount of a scale inhibitor to said feed stream, said scale inhibitor comprises an AA-AMPS copolymer. | 03-04-2010 |
20110108480 | PURIFICATION OF OIL SANDS POND WATER - A method of enhancing flux of tailings settling pond water from an oil sands process through a membrane separation system and purifying the water comprising is disclosed. The process comprises the following steps: (a) treating the water with an effective amount of one or more water-soluble cationic polymers, amphoteric polymers, zwitterionic polymers, or a combination thereof; (b) passing the treated water through a membrane separation system; and (c) optionally, passing the permeate from step (b) through an additional membrane separation system. | 05-12-2011 |
20140061130 | METHOD OF HEAVY METAL REMOVAL FROM WATER STREAMS - The invention provides methods and compositions for separating metals from a liquid medium, the method uses a copolymer derived from at least two monomers: acrylic-x and an alkylamine, wherein said polymer is modified to contain a functional group capable of scavenging one or more compositions containing one or more metals are disclosed. The treated liquid is then passed through a filtration system. The scavenging effect of the combination of the treatment with the filtration is unexpectedly greater than the sum of its parts. | 03-06-2014 |
20140246372 | METHOD FOR TREATMENT AND REUSE OF USED WATER STREAMS - Methods for recovering energy and water from at least one energy-rich process water stream are provided. The methods optionally incorporate the use of filtration, reverse osmosis, ion exchange, water softening, forward osmosis, and membrane distillation. The methods can be used to recover energy and water from blowdown or condensate from a water-containing industrial process, which in certain embodiments may be a boiler system. | 09-04-2014 |