Patents Assigned to Siemens Pte Ltd
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Publication number: 20130334134Abstract: The inventive process scheme and its various embodiments described herein will comprise filtering a selenium containing water by reverse osmosis or nanofiltration to produce a primary permeate stream at least meeting the water stream effluent discharge requirements of the location and a concentrate stream containing the removed selenium and other species, a RO or NF concentrate treatment specific to the case which will treat and reduce the selenium content of the concentrate, optionally in conjunction with a sulfate removal process, and result in a highly concentrated sludge or other output, and a selenium depleted aqueous overflow stream, a portion of which will be combined with the primary permeate stream so that the selenium content of the combined stream does not exceed the local requirement, and the reminder of the selenium depleted aqueous overflow stream will be returned to be combined with the selenium containing water entering the inlet of the primary reverse osmosis treatment.Type: ApplicationFiled: September 23, 2011Publication date: December 19, 2013Applicant: SIEMENS PTE. LTD.Inventors: Marek Mierzejewski, Michael W. Wismer, Karthikeyan Sathrugnan
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Patent number: 8591730Abstract: An ultraviolet reactor for treating a fluid. The reactor includes a vessel having an inlet for receiving fluid and an outlet for discharging fluid. The reactor further includes an ultraviolet light source and baffle plates. The baffle plates include holes arranged in a predetermined pattern for providing plug flow in areas in the reactor near the ultraviolet light source.Type: GrantFiled: July 28, 2010Date of Patent: November 26, 2013Assignee: Siemens Pte. Ltd.Inventors: Zhee Min Jimmy Yong, David Stibitz, Bruce Lee Coulter, Michael Scott Hoosier
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Publication number: 20130288142Abstract: Reverse electrodialysis (RED) may be used to neutralize acid and caustic effluent waste streams, such as in the semiconductor industry. Power may be generated while waste streams are treated by converting chemical energy into electric energy. A bipolar membrane may be integrated into the RED system. Alternatively, an anion exchange membrane and a cation exchange membrane may be overlapped and used in place of a bipolar membrane. A cell pair with four membranes and four chambers, without a bipolar membrane, may also be implemented.Type: ApplicationFiled: October 28, 2011Publication date: October 31, 2013Applicant: SIEMENS PTE. LTD.Inventors: Rongqiang Fu, Kee Hoe Ng
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Publication number: 20130206700Abstract: Aspects and embodiments of the present disclosure are directed to apparatus and methods of filtering a fluid to reduce a level of at least one contaminant therein. The filtering of the fluid may be accomplished with a radial flow filtration column comprising a fluid chamber having an inlet, an outlet, and a side wall, an inner permeable retainer positioned in the fluid chamber, an outer permeable retainer positioned in the fluid chamber spaced apart from and surrounding the inner permeable retainer, a media bed compartment formed between the inner permeable retainer and the outer permeable retainer, a media bed comprising zero-valent iron disposed within the media bed compartment, and an adjustable element biased into the media bed compartment and configured to maintain a predetermined packing density of a media bed to be disposed within the media bed compartment.Type: ApplicationFiled: March 15, 2013Publication date: August 15, 2013Applicant: Siemens Pte. Ltd.Inventors: Chakravarthy S. Gudipati, Richard E. Woodling
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Publication number: 20120117789Abstract: An electrical purification apparatus and methods of making same are disclosed. The electrical purification apparatus may provide for increases in operation efficiencies, for example, with respect to current efficiencies and membrane utilization.Type: ApplicationFiled: November 11, 2011Publication date: May 17, 2012Applicant: SIEMENS PTE. LTD.Inventors: Li-Shiang Liang, Joseph D. Gifford, John K. Chan, Lawrence J. Salvo
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Publication number: 20120118738Abstract: An electrical purification apparatus and methods of making same are disclosed. The electrical purification apparatus may provide for increases in operation efficiencies, for example, with respect to current efficiencies and membrane utilization.Type: ApplicationFiled: November 11, 2011Publication date: May 17, 2012Applicant: SIEMENS PTE. LTD.Inventors: Li-Shiang Liang, Joseph D. Gifford, John K. Chan, Lawrence J. Salvo
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Publication number: 20120118729Abstract: An electrochemical separation system may be modular and may include at least a first modular unit and a second modular unit. Each modular unit may include a cell stack and a frame. The frame may include a manifold system. A flow distribution system in the frame may enhance current efficiency. Spacers positioned between modular units may also enhance current efficiency of the system.Type: ApplicationFiled: November 11, 2011Publication date: May 17, 2012Applicant: SIEMENS PTE. LTD.Inventors: Li-Shiang Liang, Keng Hoo Yeo, Lawrence J. Salvo
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Publication number: 20120118742Abstract: An electrochemical separation system may be modular and may include at least a first modular unit and a second modular unit. Each modular unit may include a cell stack and a frame. The frame may include a manifold system. A flow distribution system in the frame may enhance current efficiency. Spacers positioned between modular units may also enhance current efficiency of the system.Type: ApplicationFiled: November 11, 2011Publication date: May 17, 2012Applicant: SIEMENS PTE. LTD.Inventors: Li-Shiang Liang, Keng Hoo Yeo, Lawrence J. Salvo
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Publication number: 20120118731Abstract: An electrochemical separation system may be modular and may include at least a first modular unit and a second modular unit. Each modular unit may include a cell stack and a frame. The frame may include a manifold system. A flow distribution system in the frame may enhance current efficiency. Spacers positioned between modular units may also enhance current efficiency of the system.Type: ApplicationFiled: November 11, 2011Publication date: May 17, 2012Applicant: SIEMENS PTE. LTD.Inventors: Li-Shiang Liang, Keng Hoo Yeo, Zhee Min Jimmy Yong
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Publication number: 20120118728Abstract: An electrical purification apparatus and methods of making same are disclosed. The electrical purification apparatus may provide for increases in operation efficiencies, for example, with respect to current efficiencies and membrane utilization.Type: ApplicationFiled: November 11, 2011Publication date: May 17, 2012Applicant: SIEMENS PTE. LTD.Inventors: Li-Shiang Liang, Joseph D. Gifford, John K. Chan, Lawrence J. Salvo
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Publication number: 20120118744Abstract: An electrochemical separation system may be modular and may include at least a first modular unit and a second modular unit. Each modular unit may include a cell stack and a frame. The frame may include a manifold system. A flow distribution system in the frame may enhance current efficiency. Spacers positioned between modular units may also enhance current efficiency of the system.Type: ApplicationFiled: November 11, 2011Publication date: May 17, 2012Applicant: SIEMENS PTE. LTD.Inventors: Li-Shiang Liang, Keng Hoo Yeo, Lawrence J. Salvo
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Publication number: 20120118743Abstract: An electrical purification apparatus and methods of making same are disclosed. The electrical purification apparatus may provide for increases in operation efficiencies, for example, with respect to current efficiencies and membrane utilization.Type: ApplicationFiled: November 11, 2011Publication date: May 17, 2012Applicant: SIEMENS PTE. LTD.Inventors: Li-Shiang Liang, Joseph D. Gifford, John K. Chan, Lawrence J. Salvo
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Publication number: 20120118730Abstract: An electrochemical separation system may be modular and may include at least a first modular unit and a second modular unit. Each modular unit may include a cell stack and a frame. The frame may include a manifold system. A flow distribution system in the frame may enhance current efficiency. Spacers positioned between modular units may also enhance current efficiency of the system.Type: ApplicationFiled: November 11, 2011Publication date: May 17, 2012Applicant: SIEMENS PTE. LTD.Inventors: Li-Shiang Liang, Keng Hoo Yeo, Lawrence J. Salvo
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Publication number: 20110233153Abstract: Aspects and embodiments of the present invention are directed to apparatus and methods of filtering a fluid to reduce a level of at least one contaminant therein. The filtering of the fluid may be accomplished with a radial flow filtration column comprising a fluid chamber having an inlet, an outlet, and a side wall, an inner permeable retainer positioned in the fluid chamber, an outer permeable retainer positioned in the fluid chamber spaced apart from and surrounding the inner permeable retainer, a media bed compartment formed between the inner permeable retainer and the outer permeable retainer, and an adjustable element biased into the media bed compartment and configured to maintain a predetermined packing density of a media bed to be disposed within the media bed compartment.Type: ApplicationFiled: March 24, 2011Publication date: September 29, 2011Applicant: Siemens Pte. Ltd.Inventors: Davis Yohanes Arifin, Kok Wee Henry Lim, Karthikeyan Sathrugnan, Richard Woodling
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Publication number: 20110163032Abstract: A high recovery sulfate removal process comprises treating a feed water stream conditioned with antiscalant from a source with a reverse osmosis membrane system to produce a purified water permeate stream and a reject stream containing the retained or rejected ions and organic matter. The reject stream is further treated to remove dissolved and suspended species. The reject stream flows to a desaturation/clarification process. A preferred process includes a constant stirred tank reactor (CSTR) where co-precipitation agent is added followed by a clarifier. Water recycled from the clarifier overflow is blended with feed water stream. The removed solids are collected as sludge or a slurry and disposed of in a manner consistent with applicable regulations.Type: ApplicationFiled: September 17, 2009Publication date: July 7, 2011Applicant: Siemens Pte LtdInventors: Gerald Alexander, Stanley R Karrs, Richard Woodling, Karthikeyan Sathrugnan