Patent ID: 8017014
Filing Date: 2011-09-13
Classification: B01D,C02F,Y02W

Abstract:
1. A method for improving flux in a membrane bioreactor system, the membrane bioreactor system comprising at least one anoxic reactor and at least one aeration tank, the at least one aeration tank having at least one aeration nozzle, the membrane bioreactor system comprising a submerged membrane of which the influent has a concentration of salts or inorganic oxides sufficient to cause scaling or inorganic fouling conditions, the method comprising adding an effective amount of one or more cationic, amphoteric or zwitterionic polymers, or a combination thereof to said membrane bioreactor system, wherein said membrane bioreactor system has mixed liquor suspended solids of 3,000 to 30,000 mg/L; wherein the cationic, amphoteric, or zwitterionic polymers are introduced directly into the membrane bioreactor system, including being added directly to the at least one anoxic reactor.