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:
Jul. 05, 2011
Filed:
Dec. 20, 2006
Thor Thorsen, Trondheim, NO;
Torleif Holt, Trondheim, NO;
Thor Thorsen, Trondheim, NO;
Torleif Holt, Trondheim, NO;
Statkraft Development AS, , NO;
Abstract
A method and system for performing maintenance on a membrane having semi-permeable properties and is used in a pressure retarded osmosis PRO, the membrane having a high pressure first side and second side of lower pressure. A time controllable first valve or pump () is connected between an input () to the low pressure side of the membrane (') and an input () to the high pressure side of the membrane (′), said first valve or pump operable to selectively deliver a plug () of a second type of water (FW) to the first side of the membrane to lower concentration of dissolved substance (s) in water of a first type (SW) thereat, thereby creating a PRO pressure backwash function with the water of the second type (FW) from the first to the second side of the membrane pressurized on said first side by high pressure supply of water of the first type (SW) upstream of said plug () of water of the second type (SW).