US 12,227,440 B2
Cerium-lanthanum treatment method for reduction of contaminants in wastewater membrane bioreactors
Pamela Leigh Cornish, White Lake, MI (US); and Mason Reames Haneline, Orange, CA (US)
Assigned to NEO Water Treatment, LLC, Greenwood Village, CO (US)
Filed by Neo Chemicals & Oxides, LLC, Greenwood Village, CO (US)
Filed on Nov. 16, 2022, as Appl. No. 18/056,159.
Application 18/056,159 is a continuation of application No. 17/219,359, filed on Mar. 31, 2021, granted, now 11,530,148.
Application 17/219,359 is a continuation of application No. 16/581,561, filed on Sep. 24, 2019, granted, now 10,988,395, issued on Apr. 27, 2021.
Claims priority of provisional application 62/736,122, filed on Sep. 25, 2018.
Prior Publication US 2023/0183113 A1, Jun. 15, 2023
Int. Cl. C02F 3/12 (2023.01); B01D 61/16 (2006.01); B01D 61/22 (2006.01); C02F 1/52 (2023.01); C02F 101/10 (2006.01)
CPC C02F 3/1215 (2013.01) [B01D 61/16 (2013.01); B01D 61/22 (2013.01); C02F 1/5236 (2013.01); C02F 1/5245 (2013.01); C02F 3/1268 (2013.01); C02F 3/1273 (2013.01); B01D 2311/04 (2013.01); B01D 2311/12 (2013.01); B01D 2311/246 (2013.01); B01D 2311/2642 (2013.01); B01D 2311/2688 (2013.01); B01D 2315/06 (2013.01); C02F 2101/105 (2013.01); C02F 2209/003 (2013.01); C02F 2209/08 (2013.01); C02F 2209/10 (2013.01); C02F 2209/11 (2013.01); C02F 2209/18 (2013.01); C02F 2209/22 (2013.01); C02F 2209/40 (2013.01); Y02W 10/10 (2015.05)] 20 Claims
OG exemplary drawing
 
1. A method for treating wastewater using a membrane bioreactor comprising:
dosing a wastewater stream, as part of a membrane bioreactor system, containing a first concentration of phosphorus with a dose amount of a rare earth clarifying agent to obtain a dosed wastewater stream, the first concentration of phosphorus being greater than a target concentration of phosphorus; and
passing the dosed wastewater stream through a membrane of the membrane bioreactor system to obtain a membrane permeate stream, the membrane permeate stream having a permeate concentration of phosphorus less than the first concentration phosphorus, wherein the membrane of the membrane bioreactor system is selected from the group consisting of polyvinylidene fluoride (PVDF); polyether sulfone (PES); polysulfone (PS); polyacrylonitrile (PAN); polyvinylchloride (PVC); polypropylene; chlorinated polyethylene; polyimide; polyamide; cellulose acetate; silicone-coated polyimide; polyether ether ketone (PEEK), alumina, silica, or ceramic.