US 12,145,871 B2
System for removing per- and polyfluorinated alkyl substances from contaminated aqueous streams, via chemical aided filtration, and methods of use thereof
Harikrishnan Parthasarathy, Flowery Branch, GA (US)
Assigned to WP&E Technologies and Solutions, LLC, Flowery Branch, GA (US)
Filed by WP&E Technologies and Solutions, LLC, Flowery Branch, GA (US)
Filed on Apr. 18, 2023, as Appl. No. 18/136,158.
Application 18/136,158 is a continuation of application No. 17/183,333, filed on Feb. 23, 2021, granted, now 11,661,360.
Claims priority of provisional application 63/041,099, filed on Jun. 18, 2020.
Prior Publication US 2023/0271860 A1, Aug. 31, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C02F 1/52 (2023.01); B01D 21/01 (2006.01); C02F 1/00 (2023.01); C02F 9/00 (2023.01); B03D 3/06 (2006.01); C02F 1/28 (2023.01); C02F 11/12 (2019.01); C02F 101/36 (2006.01)
CPC C02F 1/5245 (2013.01) [B01D 21/01 (2013.01); C02F 1/004 (2013.01); C02F 1/5281 (2013.01); C02F 9/00 (2013.01); B03D 3/06 (2013.01); C02F 1/281 (2013.01); C02F 11/12 (2013.01); C02F 2101/36 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system for removal of contaminants from a contaminated aqueous stream, the system comprising:
a) an agitation and flocculation system configured to receive an aqueous stream contaminated with contaminants, and configured to receive an anhydrite quantity as a primary flocculant, the agitation and flocculation system comprising an agitation and mixing subsystem for agitating the aqueous stream and mixing the aqueous stream with the anhydrite quantity such that the anhydrite quantity interacts with negatively charged contaminants to form a precipitate of calcium+contaminant complexes in the aqueous stream, the agitation and flocculation system also configured to cease agitating and mixing the aqueous stream such that a portion of the calcium+contaminant complexes settle or are redirected under the influence of gravity, and such that a portion of the calcium+contaminant complexes resist the influence of gravity and remain suspended in a partially decontaminated aqueous stream;
b) a particulate filter capture system comprising filter media, and configured to receive the partially decontaminated aqueous stream and to capture, via the filter media, the calcium+contaminant complexes that resist the influence of gravity and remain suspended in the partially decontaminated aqueous stream; and
c) a feedback system configured to react to a concentration of at least one of a group consisting of perfluoroalkylcarboxylic acids, perfluoroalkyl sulfonates, perfluoroalkyl-sulfonic acids, and perfluorosulfonamidoacetic acids in the aqueous stream, and the concentration of at least one of the group consisting of perfluoroalkylcarboxylic acids, perfluoroalkyl sulfonates, perfluoroalkyl-sulfonic acids, and perfluorosulfonamidoacetic acids in the partially decontaminated aqueous stream.