ULTRAFILTRACION PDF

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Ultrafiltration UF is a pressure-driven purification process that separates particulate matter from soluble compounds using an ultrafine membrane media. Ultrafiltration is an excellent separation technology for desalination pretreatment, reverse osmosis pretreatment, and wastewater reclamation, as well as for producing potable water. With over 70 years of separation-technology leadership and products in more than 1, ultrafiltration installations worldwide, we offer a portfolio of products designed for outstanding membrane separation, extreme productivity and efficiency, and exceptional reliability.

Learn of the role of our ultrafiltration products in the desalination of water on the Island of Cyprus. As with most conventional filtration methods, sand filters and media filtration require consistent raw water quality to deliver quality effluent, which is not always possible.

They also don't provide an absolute barrier. Traditional media filters typically remove particles to down to about 5 microns. Ultrafiltration UF , however, does not suffer from those limitations. This technology uses an ultrafiltration membrane barrier to exclude particles 0. When used as a pretreatment for reverse osmosis RO , UF also helps reduce fouling of the RO membranes, which can lead to:.

In ultrafiltration, water and low-molecular-weight substances are passed through an ultrafine membrane by the application of pressure to the system; flow through the membrane is achieved by applying a pressure gradient between the outer and inner walls of the membrane structure. Ultrafiltration membranes have pore sizes in the range of 0.

The process, however, does not reject particles smaller than the pores, such as dissolved salts or organics; nor does it reject other species such as true color, taste, and odor. Ultrafiltration membranes have a service life of three to seven years and potentially longer. They are commercially available in hollow fiber, tubular, plate, and frame, as well as spiral wound configurations.

Our ultrafiltration modules are made with high-strength, hollow-fiber ultrafiltration membranes that offer the following features:. The outside-in flow configuration is tolerant of wide-ranging feed water qualities and allows air scour cleaning. The dead-end flow offers higher recovery and energy savings. The pressurized vertical shell-and-tube design eliminates the need for separate pressure vessels and allows easy removal of air from cleaning along with integrity testing steps.

The hollow fiber ultrafiltration membranes are 1. The fibers are strong due to a combination of PVDF polymer, an asymmetric membrane with smaller pores in the active filtration area, and a high porosity substructure.

PVDF membranes offer high chemical resistance e. Superior to sand filters and traditional media filtration As with most conventional filtration methods, sand filters and media filtration require consistent raw water quality to deliver quality effluent, which is not always possible.

Rejecting particles, colloids, and macromolecules In ultrafiltration, water and low-molecular-weight substances are passed through an ultrafine membrane by the application of pressure to the system; flow through the membrane is achieved by applying a pressure gradient between the outer and inner walls of the membrane structure.

High-filtration performance, high recovery, and energy savings Our ultrafiltration modules are made with high-strength, hollow-fiber ultrafiltration membranes that offer the following features:.

The modules incorporate PVDF hollow fiber membranes in an outside-in flow configuration with a 0. The modules provide superior performance, with an industry-leading ultrafiltration membrane area with low-energy and chemical consumption, effectively minimizing the number of modules needed for your design. View a list of our industry-leading ultrafiltration products. Our technologies provide premium solutions for a broad range of markets and industries. Learn more about the markets and industries that depend on ultrafiltration.

We help ensure a steady flow of clean, safe drinking water into local communities with our water-treatment solutions. We enable the smooth and safe operation of power plants through innovative water-treatment and wastewater reuse. We help energy companies improve operational efficiency with specialized water treatment and wastewater reuse. We help improve pharmaceutical formulation and delivery with advanced filtration and specialty separation technologies. We help create high-quality and sustainable production processes through effective water treatment and wastewater reuse.

Ask us how ultrafiltration can help you achieve stable, reliable, and consistent water quality. Why DuPont. Ultrafiltration UF Applying pressure-driving purification to meet stringent water-quality standards.

Pressure-driven purification for clean water at a lower cost. Answer Center Get quick answers to technical questions in our self-help center. Ultrafiltration UF details. See more details about ultrafiltration. What Is UF? Tolerance to feedwater quality upsets. No use of pretreatment chemicals polymer, coagulant, pH adjustment and associated costs for sludge disposal. Small footprint and less weight than media filters. When used as a pretreatment for reverse osmosis RO , UF also helps reduce fouling of the RO membranes, which can lead to: Reduced chemical cleaning frequency and consequently, lower operating costs and downtime.

The potential to operate RO at higher flux, with fewer membranes and vessels — leading to lower capital cost for the RO system. High-filtration performance, high recovery, and energy savings Our ultrafiltration modules are made with high-strength, hollow-fiber ultrafiltration membranes that offer the following features: 0. PVDF polymeric hollow fibers for high strength and chemical resistance. Hydrophilic PVDF fibers for easy cleaning and wettability to help maintain long-term performance.

Outside-in flow configuration for high tolerance to feed solids and the use of air scour cleaning. Our approach to ultrafiltration. Find ultrafiltration products View a list of our industry-leading ultrafiltration products. Related Markets and Industries Our technologies provide premium solutions for a broad range of markets and industries. Power generation. Related resources. Contact us.

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