	US 12,297,130 B2
	Method and system for treating ultrapure water
Boris Eliosov, St. Marys, PA (US); Bruce Lee Coulter, Rockford, IL (US); and Glen P. Sundstrom, Rockford, IL (US)
Assigned to Evoqua Water Technologies LLC, Pittsburgh, PA (US)
Filed by EVOQUA WATER TECHNOLOGIES LLC, Pittsburgh, PA (US)
Filed on Jun. 29, 2023, as Appl. No. 18/216,104.
Application 17/353,735 is a division of application No. 16/333,280, granted, now 11,072,545, issued on Jul. 27, 2021, previously published as PCT/US2017/051763, filed on Sep. 15, 2017.
Application 18/216,104 is a continuation of application No. 17/353,735, filed on Jun. 21, 2021, granted, now 11,702,351.
Claims priority of provisional application 62/435,119, filed on Dec. 16, 2016.
Claims priority of provisional application 62/394,788, filed on Sep. 15, 2016.
Prior Publication US 2023/0357056 A1, Nov. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 61/18 (2006.01); B01D 61/22 (2006.01); B01D 63/02 (2006.01); C02F 1/44 (2023.01); C02F 103/04 (2006.01)

CPC C02F 1/444 (2013.01) [B01D 61/18 (2013.01); B01D 61/22 (2013.01); B01D 63/02 (2013.01); B01D 2311/25 (2013.01); B01D 2313/50 (2013.01); C02F 2103/04 (2013.01); C02F 2209/03 (2013.01); C02F 2301/046 (2013.01)]

12 Claims

9. A method of facilitating polishing of ultrapure water (UPW), comprising:

providing an ultrafiltration (UF) module having an inlet and a permeate outlet; and

connecting the permeate outlet to the inlet; connecting the permeate outlet to a pressure control valve;

maintaining a pressure of permeate exiting the permeate outlet at a predetermined value with the pressure control valve;

connecting a recirculation pump to the inlet of the UF module;

blending the permeate with a source of UPW to form a fluid; directing the fluid to an inlet of the recirculation pump;

connecting the permeate outlet to a demand source; and

measuring a pressure of the permeate downstream of the pressure control valve using a pressure sensor prior to blending the permeate with the source of UPW.