US 12,168,622 B2
Methods and systems for removing trichloroethane, trichloroethene, and 1,4-dioxane from contaminated water and wastewater
Youneng Tang, Tallahasee, FL (US); Bruce Rittmann, Tempe, AZ (US); Chen Zhou, Chandler, AZ (US); Yihao Luo, Phoenix, AZ (US); and Rosa Krajmalnik-Brown, Chandler, AZ (US)
Assigned to Arizona Board of Regents on Behalf of Arizona State University, Scottsdale, AZ (US); and Florida State University Research Foundation, Inc., Tallahassee, FL (US)
Appl. No. 18/002,450
Filed by Arizona Board of Regents on Behalf of Arizona State University, Scottsdale, AZ (US); and Florida State University Research Foundation, Inc., Tallahassee, FL (US)
PCT Filed Jun. 17, 2021, PCT No. PCT/US2021/037922
§ 371(c)(1), (2) Date Dec. 19, 2022,
PCT Pub. No. WO2021/257896, PCT Pub. Date Dec. 23, 2021.
Claims priority of provisional application 63/040,512, filed on Jun. 17, 2020.
Prior Publication US 2023/0264991 A1, Aug. 24, 2023
Int. Cl. C02F 1/70 (2023.01); B01J 23/44 (2006.01); B01J 35/00 (2024.01); B01J 35/23 (2024.01); B01J 35/30 (2024.01); B01J 35/39 (2024.01); C02F 3/10 (2023.01); C02F 3/34 (2023.01); C02F 101/34 (2006.01); C02F 101/36 (2006.01)
CPC C02F 1/705 (2013.01) [B01J 23/44 (2013.01); B01J 35/00 (2013.01); B01J 35/23 (2024.01); B01J 35/30 (2024.01); B01J 35/393 (2024.01); C02F 3/102 (2013.01); C02F 3/34 (2013.01); C02F 2101/34 (2013.01); C02F 2101/36 (2013.01); C02F 2305/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system for removing trichloroethane (TCA), trichloroethene (TCE), and 1,4-dioxane (1,4-D) contaminants from a fluid, comprising: a first reactor and a second reactor, wherein:
the first reactor and the second reactor are in fluid connection with each other;
the first reactor comprises:
a catalyst film that reduces TCA and TCE, the catalyst film comprising precious metal nanoparticles with diameters of 5-40 nm;
a first nonporous membrane comprising a gas-phase side and a liquid-phase side, wherein the catalyst film is deposited on the liquid-phase side of the first nonporous membrane; and
a hydrogen (H2) gas source, wherein the H2 gas source delivers hydrogen to the gas-phase side of the first nonporous membrane and the precious metal nanoparticles and the H2 gas catalyze the reduction of TCA and TCE; and
the second reactor comprises:
a biofilm that oxidizes 1,4-D, wherein the biofilm comprises Methyloversatilis;
a second nonporous membrane comprising a gas-phase side and a liquid-phase side, wherein the biofilm is deposited on the liquid-phase of the second nonporous membrane; and
an oxygen (O2) gas source, wherein the O2 gas source delivers oxygen to the gas-phase side of the second non-porous membrane.