Patent
Apparatus for the production of fresh water from sea water by reverse osmosis
TLDR
In this article, an apparatus for the production of fresh water from seawater, intended to be immersed into the marine medium, is described, which consists of one high pressure chamber (1) containing a selective semi-permeable reverse osmosis membrane (11) and a bell chamber (14) having an internal axial piston permitting by a multiplier effect, to obtain at the interior of the chamber a pressure equal to the exterior pressure multiplied by a ratio S/s of the working surfaces of the bell chamber and the internal piston.Abstract:
The invention relates to an apparatus for the production of fresh water from seawater, intended to be immersed into the marine medium. The apparatus comprises one high pressure chamber (1) containing a selective semi-permeable reverse osmosis membrane (11) and a bell chamber (14) having an internal axial piston permitting by a multiplier effect, to obtain at the interior of the chamber (1) a pressure equal to the exterior pressure multiplied by a ratio S/s of the working surfaces of the bell chamber and the internal piston. The semi-permeable membrane communicates across a separation wall (3) of the high pressure chamber with the interior volume of the bell chamber (14). This internal volume is placed in communication with the surface by a flexible tube (25) in such a manner as to play the dual role of, on one hand, a subatmospheric gas chamber, and on the other hand means for receiving fresh water after osmosis across the membrane.read more
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Water treatment systems and methods
TL;DR: Water treatment systems and methods are provided to minimize membrane fouling and the required maintenance that results therefrom as mentioned in this paper, where a water treatment system includes a pressure vessel with a plurality of spaced-apart membranes disposed therein, and an impeller or other means for circulating feed water through the interior of the vessel and past the membranes.
Patent
Desalinization system and process
TL;DR: In this article, the head pressure of the body of sea water is utilized to force sea water through the separator means to separate the salt from the sea water, and the separators are positioned at a location a substantial distance below the surface of a body of water.
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Depth exposed membrane for water extraction
TL;DR: A DEMWAX™ water treatment system includes membrane modules (102) and a collection channel (104), which are submerged at depth and tethered to one or more anchors (100) on the ocean floor.
Patent
Seawater pressure-driven desalinization apparatus with gravity-driven brine return
TL;DR: In this paper, a large metal cylinder, with open top and bottom ends, is anchored to the sea floor offshore, and several reverse osmosis devices are attached to the side of the cylinder, each containing a membrane that will allow water molecules, but not sodium and chlorine ions, to pass through.
Patent
Water treatment systems and associated methods
TL;DR: Water treatment systems and associated methods are generally described in this article, where water treatment systems can be used to pre-treat an aqueous stream that is subsequently transported to a desalination apparatus and/or post-tracting an output stream that has been produced by a desalinization apparatus.
References
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Patent
Reverse osmosis method and apparatus
TL;DR: In this paper, the reverse side of the pump piston or diaphragm is assumed to act as a reversal of force applied to the rod of the piston rod, and a differential surge absorber provides continuity of feed solution circulation past membrane surfaces during the return pump stroke.
Patent
Wave-powered desalination of seawater
TL;DR: In this article, a water wave-powered piston pump is proposed for reverse osmosis desalination of seawater. But this pump is not suitable for use in the water wave desalinization process.
Patent
Reverse-osmosis apparatus for producing fresh water from seawater
TL;DR: In this article, the authors describe a fresh water producing apparatus to be immersed in a marine medium and of the type comprising at least one reverse-osmosis selective semi-permeable membrane.