Patents Assigned to Aquatech International, LLC
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Patent number: 11434150Abstract: Embodiments provide methods and structures for purification or volume reduction of a brine by an advanced vacuum distillation process (AVMD) to achieve higher flux by passage of vapors through an AVMD distillation unit. In one example, brine is circulated in a tank. The tank may include one or more membrane pouches that are submerged in the circulating brine or placed above the water level of the hot circulating brine. In other embodiments the membrane pouches are outside of the tank that includes the hot circulating brine but still in communication with it. The circulating brine is heated, allowing creation of water vapor. Using a vacuum, the water vapor is drawn through the membrane, where it may be condensed and subjected to further beneficial use. This process can concentrate to levels to generate crystals or solids, which can be separated and utilized.Type: GrantFiled: April 22, 2016Date of Patent: September 6, 2022Assignee: AQUATECH INTERNATIONAL, LLCInventors: Ravi Chidambaran, Pavan Raina, Narendra Singh Bisht, Santosh Venkatesh Bhinge
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Patent number: 11180397Abstract: Many processes generate wastewater streams rich in sulfate and chloride. These salt components are traditionally not recovered and are discharged to the environment. The invention recovers pure water for recycle/reuse and simultaneously generates valuable pure salts of NaCl and Na2SO4 for beneficial reuse, eliminating the waste stream. Process consists of the sequential crystallization of salt products with an intermediate purification step in which a chemical reactant is added to elevate levels of purity. The process is configured to simultaneously achieve zero liquid discharge.Type: GrantFiled: December 3, 2018Date of Patent: November 23, 2021Assignee: AQUATECH INTERNATIONAL, LLCInventors: Daniel P. Bjorklund, Vinod A. Raje, James M. Marlett, Manish Backliwal, Richard Schoen, Gregory Mandigo
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Patent number: 11008237Abstract: We provide methods, systems, and apparatus for treatment of high chemical oxygen demand wastewater using anaerobic treatment with ceramic membranes. We also provide post-treatment using microbial fuel cells.Type: GrantFiled: October 23, 2017Date of Patent: May 18, 2021Assignee: AQUATECH INTERNATIONAL, LLCInventors: Ravi Chidambaran, Pavan Raina, Nitin Chandan, Sneha Suryakant Chawande
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Patent number: 10773985Abstract: A process for removal of selenium and nitrate from waste water includes both electrochemical and bioprocessing treatment. Embodiments include use of activated walnut shell a growth media for selenium-reducing bacteria.Type: GrantFiled: November 27, 2018Date of Patent: September 15, 2020Assignee: Aquatech International, LLCInventors: Ravi Chidambaran, Pavan Raina, Nitin Chandan, Dhairyasheel Toraskar, Narendra Singh Bisht
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Patent number: 10538445Abstract: We provide a process for treatment of produced water, including but not limited to water produced by a “steam flood” process for extraction of oil from oil sands, including the removal of color from the water. This removal may be accomplished through addition of color-removal polymers and flocculents. This process may also be useful for other water treatment processes including reverse osmosis and filtration.Type: GrantFiled: August 8, 2017Date of Patent: January 21, 2020Assignee: Aquatech International, LLCInventors: Ravi Chidambaran, Narendra Singh Bisht, Pavan Raina
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Publication number: 20190263695Abstract: We provide methods, systems, and apparatus for treatment of high chemical oxygen demand wastewater using anaerobic treatment with ceramic membranes. We also provide post-treatment using microbial fuel cells.Type: ApplicationFiled: October 23, 2017Publication date: August 29, 2019Applicant: Aquatech International, LLCInventors: Ravi Chidambaran, Pavan Raina, Nitin Chandan, Sneha Suryakant Chawande
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Publication number: 20190092667Abstract: A process for removal of selenium and nitrate from waste water includes both electrochemical and bioprocessing treatment. Embodiments include use of activated walnut shell a growth media for selenium-reducing bacteria.Type: ApplicationFiled: November 27, 2018Publication date: March 28, 2019Applicant: Aquatech International, LLCInventors: Ravi Chidambaran, Pavan Raina, Nitin Chandan, Dhairyasheel Toraskar, Narendra Singh Bisht
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Patent number: 10173914Abstract: A process for removal of selenium and nitrate from waste water includes both electrochemical and bioprocessing treatment. Embodiments include use of activated walnut shell a growth media for selenium-reducing bacteria.Type: GrantFiled: February 15, 2017Date of Patent: January 8, 2019Assignee: Aquatech International, LLCInventors: Ravi Chidambaran, Pavan Raina, Nitin Chandan, Dhairyasheel Toraskar, Narendra Singh Bisht
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Publication number: 20170334758Abstract: We provide a process for treatment of produced water, including but not limited to water produced by a “steam flood” process for extraction of oil from oil sands, including the removal of color from the water. This removal may be accomplished through addition of color-removal polymers and flocculents. This process may also be useful for other water treatment processes including reverse osmosis and filtration.Type: ApplicationFiled: August 8, 2017Publication date: November 23, 2017Applicant: AQUATECH INTERNATIONAL, LLCInventors: Ravi CHIDAMBARAN, Narendra Singh BISHT, Pavan RAINA
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Patent number: 9738553Abstract: We provide a process for treatment of produced water, including but not limited to water produced by a “steam flood” process for extraction of oil from oil sands, including the removal of color from the water. This removal may be accomplished through addition of color-removal polymers and flocculents. This process may also be useful for other water treatment processes including reverse osmosis and filtration.Type: GrantFiled: March 15, 2013Date of Patent: August 22, 2017Assignee: Aquatech International, LLCInventors: Ravi Chidambaran, Narendra Singh Bisht, Pavan Raina