Evgeniya Freydina

US Patent:

7563351, Jul 21, 2009

Filed:

Nov 13, 2003

Appl. No.:

10/712163

Inventors:

Frederick Wilkins - Pepperell MA, US
Evgeniya Freydina - Acton MA, US
Aytac Sezgi - Bedford NH, US
Reshma Madhusudan - Arlington Heights IL, US
Anil D. Jha - Lincoln MA, US

Assignee:

Siemens Water Technologies Holding Corp. - Warrendale PA

International Classification:

B01D 61/44

US Classification:

204524, 204525, 204533, 204536, 204632

Abstract:

A water treatment system provides treated or softened water to a point of use by removing a portion of any hardness-causing species contained in water from a point-of-entry coming from a water source, such as municipal water, well water, brackish water and water containing foulants. The water treatment system typically treats the water containing at least some undesirable species before delivering the treated water to a point of use. The water treatment system has a controller for adjusting or regulating at least one operating parameter of the treatment system or a component of the water treatment system to optimize the operation and performance of the system or components of the system. A flow regulator regulates a waste stream flow to drain and can be operated to recirculate fluid through electrode or concentrating compartments of an electrochemical device and can opened and closed intermittently according to a predetermined schedule or based on an operating parameter of the water treatment system. The flow regulator can also be charged so that ionic species can be generated in the surrounding fluid, which, in turn, can lower the pH of the surrounding fluid.

US Patent:

7582198, Sep 1, 2009

Filed:

Nov 13, 2003

Appl. No.:

10/712674

Inventors:

Frederick Wilkins - Pepperell MA, US
Evgeniya Freydina - Acton MA, US
Aytac Sezgi - Bedford NH, US
Reshma Madhusudan - Arlington Heights IL, US
Anil D. Jha - Lincoln MA, US

Assignee:

Siemens Water Technologies Holding Corp. - Warrendale PA

International Classification:

B01D 61/44
B01D 61/48

US Classification:

204522, 204524, 204525, 204533, 204631, 204632

Abstract:

A method and apparatus for producing purified water. An electrochemical system can be configured to pass product water through depletion compartments as well as a cathode compartment. An electrochemical apparatus may also be configured to pass concentrate through both concentrating compartments and an anode compartment.

US Patent:

7604725, Oct 20, 2009

Filed:

Nov 13, 2003

Appl. No.:

10/712250

Inventors:

Gary Ganzi - Lexington MA, US
Anil D. Jha - Lincoln MA, US
Frederick Wilkins - Pepperell MA, US
Evgeniya Freydina - Acton MA, US
Aytac Sezgi - Bedford NH, US
Reshma Madhusudan - Arlington Heights IL, US

Assignee:

Siemens Water Technologies Holding Corp. - Warrendale PA

International Classification:

B01D 61/44
B01D 61/48

US Classification:

204533, 204536, 204632, 204633

Abstract:

The present invention is directed to a water treatment or purification system and method for providing treated water in industrial, commercial and residential applications. The treatment system provides treated or softened water to a point of use by removing at least a portion of any hardness-causing species contained in water from a water source, such as municipal water, well water, brackish water and water containing foulants. The water treatment system includes an electrochemical device, such as an electrodeionization device, that can have at least one compartment that generates and traps hydrogen ions which can be used in another compartment of the electrochemical device such as, an electrode compartment, to reduce or at least dissolve any scale. Other applications of the system would be in the treatment and processing of foods and beverages, sugars, various industries such as the chemical, pharmaceutical, waste water treatment and power generating industries.

US Patent:

7658828, Feb 9, 2010

Filed:

Apr 13, 2005

Appl. No.:

11/104791

Inventors:

Evgeniya Freydina - Acton MA, US
Aytac Sezgi - Bedford NH, US

Assignee:

Siemens Water Technologies Holding Corp. - Warrendale PA

International Classification:

B01D 61/48

US Classification:

204519, 204524, 204533, 204536, 204628, 204632

Abstract:

The present disclosure generally relates to methods, systems, and devices for electrically purifying liquids containing species such as minerals, salts, ions, organics, and the like. One aspect of the invention provides methods of regenerating media within an electrical purification device, for example, exposing the media to one or more eluting solutions, and/or selectively desorbing ions, organics, and/or other species from the media by exposing the media to certain eluting conditions. In yet another aspect, methods of selectively removing one or more ions, organics, and/or other species from a liquid to be purified are provided, e. g. , by selective removal of one or more ions, or organics, and the like from solution that can easily precipitate, and/or cause scaling or fouling to occur. In still another aspect, the invention provides a method of treating a solution containing ions, organics, and/or other species using an electrical purification apparatus in a continuous or semi-continuous fashion, while also performing regeneration of media contained within the apparatus.

US Patent:

7820024, Oct 26, 2010

Filed:

Jun 23, 2006

Appl. No.:

11/474299

Inventors:

Evgeniya Freydina - Acton MA, US

Assignee:

Siemens Water Technologies Corp. - Warrendale PA

International Classification:

B01D 61/48

US Classification:

204632, 204525, 204533, 204536, 204518, 204627, 204524

Abstract:

The disclosed techniques involve electrical separation systems that allow recovery of species from feedstreams, typically aqueous solutions. The disclosed techniques can also provide electrical separation systems having reduced tendency to form scale especially when water is being purified to reduce the concentration of hardness-causing species.

US Patent:

7846340, Dec 7, 2010

Filed:

Nov 13, 2003

Appl. No.:

10/712685

Inventors:

Evgeniya Freydina - Acton MA, US
Anil D. Jha - Lincoln MA, US
Frederick Wilkins - Pepperell MA, US
Aytac Sezgi - Bedford NH, US
Reshma Madhusudan - Arlington Heights IL, US

Assignee:

Siemens Water Technologies Corp. - Warrendale PA

International Classification:

C02F 1/46
C02F 1/48

US Classification:

210744, 204518, 204519, 204542, 204627, 204628, 204648, 204661, 210 86, 210 87, 210 961, 210 97, 210103, 210243, 2102571, 210739, 210746, 210748

Abstract:

A water treatment system provides treated or softened water to a point of use by removing a portion of any hardness-causing species contained in water from a point of entry coming from a water source, such as municipal water, well water, brackish water and water containing foulants. The water treatment system typically treats the water containing at least some undesirable species before delivering the treated water to a point of use. The water treatment system has a reservoir system in line with an electrochemical device. The electrochemical device of the water treatment system is operated at a low current and low flow rate to minimize water splitting or polarization, which minimizes scale formation.

US Patent:

7862700, Jan 4, 2011

Filed:

Nov 13, 2003

Appl. No.:

10/712162

Inventors:

Frederick Wilkins - Pepperell MA, US
Evgeniya Freydina - Acton MA, US
Aytac Sezgi - Bedford NH, US
Reshma Madhusudan - Arlington Heights IL, US
Anil D. Jha - Lincoln MA, US

Assignee:

Siemens Water Technologies Holding Corp. - Warrendale PA

International Classification:

B01D 61/48

US Classification:

204524, 204632

Abstract:

A method and apparatus for producing purified water. Treated water may be provided for domestic use wherein the water may be treated by removing selected dissolved species while retaining properties that may improve the properties or aesthetics of the water.

US Patent:

8114259, Feb 14, 2012

Filed:

Sep 20, 2006

Appl. No.:

11/524033

Inventors:

Joseph E. Zuback - Camarillo CA, US
Gary C. Ganzi - Lexington MA, US
Evgeniya Freydina - Acton MA, US
Anil D. Jha - Lincoln MA, US
Li-Shiang Liang - Harvard MA, US
Frederick C. Wilkins - Pepperell MA, US

Assignee:

Siemens Industry, Inc. - Alpharetta GA

International Classification:

B01D 61/44
C02F 1/469

US Classification:

204518, 204520, 2102572, 210652

Abstract:

An electrically-driven separation apparatus can be used with a pressure-driven separation apparatus to provide potable water having a desired total dissolved solids (TDS).