Back to results
US 12,583,764 B2Granted
PFAS treatment process for liquid effluent
AssigneeSuez International
InventorsRobert Raczko, Isabelle Baudin, Naike Noyon, Zdravka Doquang
Life of this patent
Estimating the term…
Abstract
A method for controlling for PFAS removal from a liquid effluent by a control system (100), the control system including a PFAS treatment unit (10) dedicated to the treatment of perfluoroalkyls and polyfluoroalkyl substances PFAS including at least one treatment stage optionally chosen from a PFAS treatment stage, a short chain PFAS treatment stage and a long chain PFAS treatment stage. The method allows activating the PFAS treatment unit only when PFAS, in particular specific PFAS, are detected into the liquid effluent to treat. A control system (100) to implement the method is also disclosed.
Claims16
A controlled liquid effluent system for removing PFAS substances from the liquid effluent comprising:
- an analysis unit including at least one apparatus configured to perform a non targeted analysis of the liquid effluent to treat, and generate information for providing the following data:
- data representative of the presence of carbon-fluorine bonds, data representative of the presence of fluorine, data representative of the chemical formula of at least one PFAS present in the liquid effluent to treat, and data representative of an estimated total concentration of targeted PFAS, optionally at least one apparatus configured to perform a targeted analysis of the liquid effluent to treat and generate information data representative of the concentration of PFAS identified in the liquid effluent,
- a PFAS treatment unit dedicated to removal of perfluoroalkyls and polyfluoroalkyl substances PFAS, said PFAS treatment unit including at least one treatment stage chosen from a short chain PFAS and long chain PFAS dedicated treatment stage, a short chain PFAS dedicated treatment stage and a long chain PFAS dedicated treatment stage, where:
- the long chain PFAS refer to perfluoroalkyl carboxylic acids with eight or more carbons, to perfluoroalkane sulfonates with six or more carbons, and to all the other perfluoroalkyls and polyfluoroalkyl substances PFAS having a carbon chain with six or more carbon atoms,
- the short chain PFAS refer to perfluoroalkyl carboxylic acids with seven or fewer carbons, to perfluoroalkane sulfonates with five or fewer carbons, and to all the other perfluoroalkyls and polyfluoroalkyl substances PFAS having a carbon chain with five or less carbon atoms, and
- a control unit configured to:
- provide information data representative of the presence or absence of PFAS in liquid effluent to treat,
- generate at least one activating signal for activating the PFAS treatment unit when the provided information data indicate the presence of PFAS chosen from short chain PFAS, long chain PFAS and short and long chain PFAS, this signal being chosen from:
- a signal for activating said at least one short and long chain PFAS dedicated treatment stage when the provided information data include information data representative of the presence of at least one PFAS chosen from short chain PFAS, long chain PFAS and short and long chain PFAS,
- a signal for activating said at least one short chain PFAS dedicated treatment stage when the provided information data include information data representative of the presence of at least one short chain PFAS, and
- a signal for activating at least one long chain PFAS dedicated treatment stage when the provided information data include information data representative of the presence of at least one long chain PFAS, and
- transmit said at least one activating signal to the PFAS treatment unit to activate the PFAS treatment unit, and to remove at least a part of the PFAS from the liquid effluent.
9 more elements
A method for controlling removal of perfluoroalkyl and polyfluoroalkyl substances PFAS from a liquid effluent by means of a PFAS treatment unit controlled by means of a control system, the PFAS treatment unit dedicated to the treatment of PFAS including at least one treatment stage chosen from a short and long chain PFAS dedicated treatment stage, a short chain PFAS dedicated treatment stage and a long chain PFAS dedicated treatment stage, where
- the long chain PFAS refer to perfluoroalkyl carboxylic acids with eight or more carbons, to perfluoroalkane sulfonates with six or more carbons, and to all the other perfluoroalkyls and polyfluoroalkyl substances PFAS having a carbon chain with six or more carbon atoms,
- the short chain PFAS refer to perfluoroalkyl carboxylic acids with seven or fewer carbons, to perfluoroalkane sulfonates with five or fewer carbons, and to all the other perfluoroalkyls and polyfluoroalkyl substances PFAS having a carbon chain with five or less carbon atoms,
- the method comprising:
- (A) providing information data representative of the presence or absence of PFAS in a liquid effluent to treat,
- wherein the step (A) includes:
- performing on the liquid effluent to treat a non targeted analysis and generating information data for providing the following data:
- data representative of the presence of carbon-fluorine bonds, data representative of the presence of fluorine, data representative of the chemical formula of at least one PFAS present in the liquid effluent to treat, and data representative of an estimated total concentration of targeted PFAS,
- optionally:
- identifying targeted PFAS present in the liquid effluent by comparing the information data generated by the non targeted analysis with a registered list of targeted PFAS, this list including the chemical formulas of targeted short chain PFAS, targeted long chain PFAS, or both, performing on the liquid effluent to treat a targeted analysis and generating information data representative of the concentration of targeted PFAS identified in the liquid effluent,
- (B) generating at least one activating signal for activating the PFAS treatment unit when the provided information data indicate the presence of PFAS chosen from short chain PFAS, long chain PFAS, and short and long chain PFAS, said at least one activating signal being the signal chosen from:
- a signal for activating said at least one short and long chain PFAS dedicated treatment stage when the provided information data includes information data representative of the presence of at least one PFAS chosen from short chain PFAS, long chain PFAS and short and long chain PFAS,
- a signal for activating said at least one short chain PFAS dedicated treatment stage when the provided information data include information data representative of the presence of at least one short chain PFAS, and
- a signal for activating said at least one long chain PFAS dedicated treatment stage when the provided information data include information data representative of the presence of at least one long chain PFAS, and
- (C) transmitting said at least one activating signal to the PFAS treatment unit to activate said at least one treatment stage of the PFAS treatment unit, and to remove at least a part of the PFAS from the liquid effluent.
11 more elements
Dependencies are inferred from the claim text.