US 12,246,979 B2
Method and system for providing ultrapure water with flexible lamp configuration
Christopher Hall, Colorado Springs, CO (US); and Bruce Lee Coulter, Rockford, IL (US)
Assigned to Evoqua Water Technologies LLC, Pittsburgh, PA (US)
Filed by Evoqua Water Technologies LLC, Pittsburgh, PA (US)
Filed on Jun. 5, 2023, as Appl. No. 18/205,689.
Application 17/199,092 is a division of application No. 15/571,266, granted, now 10,961,143, issued on Mar. 30, 2021, previously published as PCT/US2016/030708, filed on May 4, 2016.
Application 18/205,689 is a continuation of application No. 17/199,092, filed on Mar. 11, 2021, granted, now 11,697,607.
Claims priority of provisional application 62/160,128, filed on May 12, 2015.
Claims priority of provisional application 62/156,487, filed on May 4, 2015.
Prior Publication US 2023/0312386 A1, Oct. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C02F 9/00 (2023.01); C02F 1/32 (2023.01); C02F 1/00 (2023.01); C02F 1/04 (2023.01); C02F 1/20 (2023.01); C02F 1/42 (2023.01); C02F 1/44 (2023.01); C02F 1/469 (2023.01); C02F 1/70 (2023.01); C02F 1/72 (2023.01); C02F 103/04 (2006.01); C02F 103/34 (2006.01)
CPC C02F 9/00 (2013.01) [C02F 1/325 (2013.01); C02F 1/004 (2013.01); C02F 1/008 (2013.01); C02F 1/04 (2013.01); C02F 1/20 (2013.01); C02F 1/42 (2013.01); C02F 2001/427 (2013.01); C02F 1/441 (2013.01); C02F 1/444 (2013.01); C02F 1/4693 (2013.01); C02F 1/4695 (2013.01); C02F 1/70 (2013.01); C02F 1/722 (2013.01); C02F 2103/04 (2013.01); C02F 2103/346 (2013.01); C02F 2201/3227 (2013.01); C02F 2201/326 (2013.01); C02F 2209/20 (2013.01); C02F 2301/08 (2013.01); C02F 2303/18 (2013.01); C02F 2305/023 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system for treating water comprising:
a primary actinic radiation reactor;
a source of a persulfate precursor compound disposed to introduce at least one persulfate precursor compound into the primary actinic radiation reactor;
a total organic carbon (TOC) concentration sensor located upstream of the primary actinic radiation reactor;
a persulfate concentration sensor located downstream of the primary actinic radiation reactor; and
a controller operatively coupled to receive at least one input signal from at least one of the TOC concentration sensor and the persulfate concentration sensor, the controller comprising an electronic ballast circuit including a resonant tank circuit having a power output operatively coupled to a source of actinic radiation having a continuously variable intensity disposed within the primary actinic radiation reactor, the electronic ballast circuit operable to control the continuously variable intensity of the source of actinic radiation over a continuous range of power levels by continuously measuring current supplied to the source of actinic radiation and adjusting a frequency of a drive voltage supplied to the resonant tank circuit responsive to the at least one input signal from the at least one of the TOC concentration sensor and the persulfate concentration sensor, and the measured current supplied to the source of actinic radiation.