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.:
Date of Patent:
Aug. 19, 2025
Filed:
Jun. 23, 2021
Purdue Research Foundation, West Lafayette, IN (US);
Akshay Krishna Rao, Folsom, CA (US);
George Maged Elias, Elmhurst, IL (US);
Stephen Mccoy Coan, Hinsdale, IL (US);
Luke Wrede, Mount Prospect, IL (US);
David Martin Warsinger, West Lafayette, IN (US);
Owen R Li, San Jose, CA (US);
Sandra Patricia Cordoba Renteria, Chacarita Segunda Etapa Santande, CO;
Purdue Research Foundation, West Lafayette, IN (US);
Abstract
A method of operating a dual reverse osmosis/pressure retarded osmosis plant, including when electricity costs less than a first predetermined price, moderate salinity water is pumped into the first portion of a pressure vessel having first and second portions separated by a water permeable/salt impermeable osmotic membrane to yield desalinated permeate in the second portion and brine in the first portion. Further, when electricity costs greater than the first predetermined price, low salinity water is pumped into the second portion and brine is pumped into the first portion to yield pressurized moderate salinity water in the second portion which is run through an energy recovery device to generate electricity. The salinity of the low salinity water is lower than the salinity of the moderate salinity water, and the salinity of the moderate salinity water is lower than the salinity of the brine.