Hybrid Reverse Osmosis for Water Filtration

A new type of water purifier that prevents waste of purified water in pipes. It includes a raw water pump, an ultrafiltration membrane, a reverse osmosis membrane, and storage tanks connected by valves and pipes. The raw water enters, gets filtered, and then goes through reverse osmosis. The purified water flows to storage tanks instead of directly to equipment. Circulation pumps recirculate water between storage tanks and equipment. This prevents stagnant water in pipes and equipment, reducing waste.

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Integrated reverse osmosis direct drinking water treatment process route based on tap water that provides high-quality drinking water through pipelines in areas like factories where existing water sources are poor. The process involves steps like ultraviolet sterilization, filtration, reverse osmosis, mineralization, and advanced oxidation sterilization to purify tap water for direct consumption. It aims to avoid wasteful treatment of low-quality source water by separating drinking water quality from general use water via dedicated pipelines.

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Like oilfield-produced water, a process for treating high total dissolved solids (TDS) water uses forward osmosis (FO) and a charged membrane. The process uses an FO system to draw water across a membrane from the high TDS stream into a more concentrated brine stream. The extracted water is then treated to purify it. The FO system uses a charged membrane that contains resin embedded throughout the membrane. The charged membrane can selectively extract specific ions like heavy metals, boron, mercury, and nitrates from the high TDS water while rejecting other ions.

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A drinking water purification system with multiple storage tanks to prevent back pressure damage to the reverse osmosis membrane. The system has separate tanks for storing purified water. The raw water is treated with multimedia, carbon, and precision filters before going through the reverse osmosis process. A high-pressure pump feeds the reverse osmosis membrane. The purified water goes into one tank, and when that tank is low, water is transferred to the other tank to maintain pressure. This prevents back pressure on the reverse osmosis membrane when the downstream tank is empty.

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A system and method for treating water using reverse osmosis (RO) and nanofiltration membranes allows high recovery rates without additional stages or pumps. It uses a two-mode process with a concentrate accumulator. In the first mode, feedwater is pumped through the RO unit, and the concentrate is stored at low pressure. In the second mode, the concentrate is drained while still pumping feedwater and recycled permeate through the RO unit. This maintains constant flow rates and pressures to achieve high recovery without requiring extra stages or pumps.

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Efficient water treatment system using reverse osmosis filtration to reduce water waste and improve resource utilization. The system involves multiple stages of reverse osmosis filtration with recirculation and reuse of concentrated water. It includes devices like softening, pumps, tanks, valves, and gauges to filter and treat water at different purity levels. The recirculation loop allows recovering and reusing some of the concentrated water discharged from each filtration stage. This reduces water waste compared to directly discharging all concentrated water.

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A compact, cost-effective, and easy-to-use water treatment system that provides safe and clean drinking water for domestic and industrial applications. The system has four modules: pre-treatment, reverse osmosis, post-treatment, and UV disinfection. The pre-treatment removes solids, organic matter, and chlorine. Reverse osmosis removes dissolved impurities. Post-treatment adjusts pH and adds minerals. UV disinfection provides final disinfection. This combined treatment addresses a wide range of contaminants for reliable purification.

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A shared water station that filters and purifies water using multi-stage treatment to provide high quality drinking water. The system receives tap water and filters it through quartz sand, activated carbon, and GAC to remove impurities. The filtered water is softened and further filtered before reverse osmosis. The softened water is then passed through ultrafiltration to produce purified water. This multi-stage treatment ensures effective purification of tap water.

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High recovery desalination system that combines nanofiltration (NF), reverse osmosis (RO), and forward osmosis (FO) to purify water from saline sources like seawater. The system uses an NF membrane to pretreat the feedwater and improve recovery. The NF permeate then goes through RO for final desalination. The reject from both NF and RO is sent through FO to concentrate the brine before disposal.

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Water purification system with adjustable mouthfeel that allows customization of the taste and texture of purified water. The system uses a series of filters including softening, ultrafiltration, activated carbon, and reverse osmosis. The filters are connected in sequence with a valve between the carbon filter and reverse osmosis filter. A TDS probe measures the concentration of total dissolved solids in the water. The valve can be opened or closed based on the TDS level to determine the amount of water that passes through the carbon filter before reverse osmosis. This allows adjustment of the carbon filtration stage to alter the mouthfeel of the purified water.

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Hybrid electrochemical and membrane-based water treatment systems can effectively remove silica from water with varying concentrations to produce ultra-pure water. The systems involve a sequence of treatment steps, including bulk demineralization through electrodialysis reversal, high recovery reverse osmosis, and final polishing by electrodeionization. The specific treatment steps and configurations are tailored based on the silica level in the feed water to optimize removal efficiency and economics.

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A complete set of high-fluorine and high-hardness drinking water purification equipment that can efficiently remove fluoride, hardness, and radioactive contaminants from water sources with high levels of these pollutants. The system uses a series of filters and membranes to treat the water. It starts with self-cleaning and precision filters to remove sediment and suspended solids. Then ultrafiltration removes organics and colloids. Next, nanofiltration removes divalent ions like heavy metals, calcium, magnesium, and sulfate. Finally, reverse osmosis removes monovalent ions like chloride, fluoride, sodium, and nitrate. The concentrated water from each step is used to flush the previous filter. This prevents clogging and allows high-fluorine, high-hardness water to be purified without

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Multi-stage filtration and purification system for treating tap water that provides thorough water quality improvement by using a multi-level filtration process with double-stage reverse osmosis ultrafiltration, electrolysis, UV sterilization, and monitoring. The system has multiple filtration devices connected by pipes, pumps, and valves. The stages include security filtration, primary ultrafiltration, secondary ultrafiltration, concentrated water recovery, purity detection, return valve, output valve, stirring tank, electrolysis, and UV sterilization. The multi-stage filtration allows progressive cleaning, detachment of concentrated water, monitoring, and final purification of tap water.

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Integrated reverse osmosis membrane water treatment system that provides a range of drinking water options with varying mineral contents. The system uses multiple stages of filtration including quartz sand, activated carbon, reverse osmosis, and ultrafiltration. Water is progressively filtered through the stages with each stage adding minerals. The final ultrafiltration stage concentrates the water while the others produce filtered water. The concentrated water goes to the next stage. This allows sequential production of water with increasing mineral content. The concentrated water is discharged and the filtered water is mixed in storage tanks to provide a range of options for users.

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A hybrid system combining electrodialysis (ED) and reverse osmosis (RO) to desalinate brackish water. It applies a low electric potential across the saline water in the ED cell to separate it into concentrated brine and dilute water. The RO chamber then processes the brine to remove more salt. Using the RO only on the concentrated brine avoids the high energy cost of treating the full feedwater volume.

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A system to treat seawater and produce water for injection into an oil-bearing reservoir. The system uses reverse osmosis (RO) and nanofiltration (NF) membranes to treat seawater, with the NF permeate blended with RO permeate to produce an injection of water with a salinity and hardness suitable for the reservoir. The system can adjust the blending ratio and treatment process to maintain consistent salinity and hardness despite changes in the feed seawater quality.

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A multi-stage reverse osmosis water purification system with intermediate stages and feed pumps to improve purity and yield compared to traditional single-stage systems. The system has multiple stages of reverse osmosis filtration connected by intermediate tanks and feed pumps between stages. The intermediate tanks allow recycling of partially purified water back to the previous stage for further filtration instead of waste. This improves overall water purity compared to single-stage systems. The feed pumps boost the pressure of the recycled water between stages to match the incoming pressure.

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Purifying water efficiently using a combination of nanofiltration and reverse osmosis membranes. The process involves passing a feed solution through a nanofiltration membrane to remove solute and yield a concentrated solution. This concentrated solution is then passed through a reverse osmosis membrane to extract water. Using a nanofiltration membrane first, higher solute levels can be achieved in the concentrate without excessive pressure. Monovalent ions can be added to boost osmotic pressure. The nanofiltration concentrate can also be recycled through additional membranes for further concentration.

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Process for efficiently filtering industrial and commercial wastewater streams to clean laundry waste streams/industrial waste streams, and/or oily waste streams. It uses a two-step filtration process: 1) ceramic microfiltration (CMF) to remove oil/grease and particulates, and 2) reverse osmosis (RO) with a special high-temperature/low fouling membrane to further purify the water. The CMF prefiltration prevents fouling of the RO membrane.

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Integrated pure water treatment system that provides highly purified water using multiple stages of filtration, reverse osmosis, and ion exchange. The system has a storage tank, raw water filter, reverse osmosis unit, and ion exchange unit. The raw water filter includes multi-media, carbon, softening, and precision filters to thoroughly clean the raw water. The reverse osmosis unit further sterilizes and purifies the water. The ion exchange unit removes remaining ions. This multi-stage treatment improves overall water quality compared to just reverse osmosis or ion exchange alone.

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