公开(公告)号：US20230002263A1

公开(公告)日：2023-01-05

申请号：US17848308

申请日：2022-06-23

Applicant: ARIZONA BOARD OF REGENTS ON BEHALF OF ARIZONA STATE UNIVERSITY

Inventor： Chen Zhou ,  Bruce Rittmann ,  Yihao Luo ,  Min Long

IPC: C02F3/34 ,  C02F3/10

Abstract: The present invention relates to systems and methods for catalytic removal of per- and polyfluoroalkyl substances (PFAS) from water and wastewater. The system and methods utilize a catalyst film and a biofilm to synergystically remove PFAS from water. In some aspects, the catalyst film reduces and defluorinates PFAS into less fluorinated counterparts of PFAS, and the biofilm metabolizes the less fluroinated counterparts of PFAS into CO2 or shorter chain PFAS.

公开(公告)号：US12168622B2

公开(公告)日：2024-12-17

申请号：US18002450

申请日：2021-06-17

Applicant: Arizona Board of Regents on Behalf of Arizona State University ,  Florida State University Research Foundation, Inc.

Inventor： Youneng Tang ,  Bruce Rittmann ,  Chen Zhou ,  Yihao Luo ,  Rosa Krajmalnik-Brown

IPC: C02F1/70 ,  B01J23/44 ,  B01J35/00 ,  B01J35/23 ,  B01J35/30 ,  B01J35/39 ,  C02F3/10 ,  C02F3/34 ,  C02F101/34 ,  C02F101/36

Abstract: Disclosed herein are systems and methods for removing trichloroethane (TCA), trichloroethene (TCE), and 1,4-dioxane (1,4-D) from contaminated liquids. The system and methods rely on catalyst reduction of TCA and TCE, where the reduced products are then degraded by microorganisms The system comprises a first reactor comprising a catalyst film of precious metal nanoparticles deposited on a first nonporous membrane and a second reactor comprising a biofilm of microorganisms that are capable of degrading ethane and 1,4-D deposited on a second nonporous membrane. The first reactor further comprises a hydrogen gas source, wherein the hydrogen gas source delivers hydrogen to the gas-phase side of the first nonporous membrane, and the catalyst film is deposited on the liquid-phase side. The second reactor further comprises an oxygen gas source, wherein the oxygen gas source delivers oxygen to the gas-phase side of the second non-porous membrane, and the biofilm is deposited on the liquid-phase side.