Energy-saving and consumption-reducing transformation and optimization of the double-membrane system
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2020-04-13
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DuPont ultrafiltration membranes utilize polyvinylidene fluoride (PVDF) material and feature a double-layer hollow fiber structure. Among PVDF ultrafiltration membranes used in industrial applications, DuPont ultrafiltration membranes have the smallest nominal pore size, capable of removing almost all particles, bacteria (4-log removal rate), most viruses, and colloids. Despite the small pore size, its extremely high porosity allows for a flux comparable to microfiltration, making it a better choice than microfiltration in most cases. • DuPont ultrafiltration employs a less prone to clogging outside-in structure, offering higher dirt-holding capacity, larger filtration area, and easier, more thorough cleaning. The flow design primarily uses dead-end filtration, but the element can also be easily converted to cross-flow filtration mode. • In water treatment, ultrafiltration can be used to remove particles, colloids, bacteria, viruses, pyrogens, proteins, and high-molecular-weight organic substances from water, resulting in purified water. DuPont Ultrafiltration Membrane Advantages • Less fouling: Membranes made of H-PVDF material • Excellent filtration performance, high flux • Durable double-layer fiber structure provides good durability and damage resistance • Very small pore size: 0.03 μm • High removal rate of bacteria and viruses • Available in both dead-end and cross-flow filtration modes • Outside-in structure provides low clogging rate, high fouling load, high flux, and easy cleaning
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