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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12521677 B1

PDFFull Text
Date of Patent:
Jan. 13, 2026

Filed:

Sep. 04, 2020

Method for controlling water purification, and a water purification apparatus

Applicants:

Baxter International Inc., Deerfield, IL (US);

Baxter Healthcare SA, Glattpark, CH;

Inventors:

Peter Sendelius, Staffanstorp, SE;

Henrik Lindgren, Genarp, SE;

Carl-Henry Örndal, Eslöv, SE;

Assignees:

Baxter International Inc., Deerfield, IL (US);

Baxter Healthcare SA, Glattpark, CH;

Attorney:

K&L Gates LLP

Primary Examiner:

Allison G Fitzsimmons

Int. Cl.
CPC ...
B01D 61/12 (2006.01); C02F 1/44 (2023.01);
U.S. Cl.
CPC ...
B01D 61/12 (2013.01); C02F 1/441 (2013.01); B01D 2311/246 (2013.01); B01D 2311/2512 (2022.08); B01D 2313/18 (2013.01); B01D 2313/243 (2013.01); C02F 2209/001 (2013.01); C02F 2209/005 (2013.01); C02F 2209/05 (2013.01); C02F 2209/40 (2013.01); C02F 2301/046 (2013.01);
Abstract

A method for controlling water purification, and a water purification apparatus (). The apparatus () comprises a reverse osmosis membrane () configured to receive feed water from a feed pump (), and to produce permeate water and reject water. The method comprises measuring (S) a property indicative of an inlet water quality Cof inlet water to the feed pump (), and determining (S) a target recovery for the water purification based on the property indicative of the inlet water quality. The method further comprises controlling (S) a feed pump speed to a predetermined speed, or to a speed determined based on a relation between the feed pump speed, the inlet water quality Cand a target permeate water quality C, based on the inlet water quality. The method comprises measuring (S) a property indicative of a product water flow rate Q, wherein the product water is permeate water that is delivered for consumption, recirculating (S) a first portion of the reject water, and controlling (S) a drain flow rate Qto drain, from a second portion of the reject water, to accomplish the target recovery based on the product water flow rate Q.

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Sendelius, Peter. (2026). Method for controlling water purification, and a water purification apparatus (U.S. Patent No. 12521677). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12521677

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